addendum number: modifying: specifications no....

November 2009 - 1 - 1623

DATE: November 17, 2009 ADDENDUM NUMBER: 1 MODIFYING: Specifications No. 1623 PROJECT: Air Release and Vacuum Valve Relocation for Treated Water Pipelines

Construction Package No. 8 BID TIME AND DATE: 2:00 p.m., November 24, 2009 FROM: THE METROPOLITAN WATER DISTRICT OF SOUTHERN CALIFORNIA

700 North Alameda Street, Third Floor Los Angeles, California 90012 (213) 217-6515

TO: All prospective bidders This addendum forms a part of the contract documents. Use Specifications No. 1623 as originally issued to submit bids, in conjunction with this addendum, and acknowledge receipt of this addendum by completing Document 00420, “Bidder's General Information,” in the specifications. This addendum consists of 2 pages of text and 19 pages of attached documents. CHANGES TO BIDDING REQUIREMENTS

1. Delete Document 00310, “Bidding Sheet,” dated August 21, 2006, and replace with the attached Document 00310, Dated November 5, 2009.

CHANGES TO SPECIFICATIONS:

2. In Section 01010, Summary of Work,” Paragraph 1.02B, after “day after Thanksgiving Day,” add “day before Christmas”

3. In Section 01010, Paragraph 1.03A, remove the information for Site No. 1268, and replace with the following:

SITE No.

FEEDER/ PIPELINE STA. NO. VALVE

SIZE

FLANGE RATING

( # )

OUTSIDE ENCLOSURE LOCATION CITY

1268* E. Orange County No. 2 249+21 (2) 8" 300 38"x28"x39"H Street Anaheim

4. In Section 01010, delete Paragraph 1.06A and replace with the following:

A. Within 90 days after receipt of the NTP, the Contractor shall complete all permitting, abatement of asbestos containing materials, potholing, removal of the exiting air-vacuum valves and replacement with new air-vacuum valves during the first shutoff valve closure for all locations except the sites requiring work outside the bird nesting season (February 15 to September 15).

5. In Section 01012, “Metropolitan Furnished Equipment,” Paragraph 1.04A, in the table change the quantity of 8” valves from 21 to: 22

6. In Section 01012, subparagraph 1.05A.1, delete the words “at least 30 calendar days,” and replace with “5 working days”

7. In Section 01012, delete subparagraph 1.05A.2, and replace with the following:

2. (Not used)

Addendum Number 1

November 2009 - 2 - 1623

8. In Section 01060, “Safety and Regulatory Requirements,” at the end of Paragraph 1.13B, add the following Paragraph 1.13C:

C. See attached document, “Public Agency Contact Information,” for contacts at various public agencies.

9. At the end of Section 01060, add the attached document “Public Agency Contact Information.”

10. Delete Section 15060, “General Mechanical Piping,” dated May 19, 2008, and replace with the attached Section 15060, dated October 19, 2009.

11. Delete Section 15075, “Brass Pipe and Fittings [Z-Pipe],” dated September 1, 2005, and replace with the attached Section 15075, dated October 7, 2009.

CHANGES TO DRAWINGS:

12. Metropolitan has made changes to the following drawing without issuing a revised drawing at this time; however, Metropolitan will issue a revised drawing showing these changes after the contract is awarded.

Reference No.

Sheet No.

Drawing No.

Description of Changes

1. G-5 B-114598

Delete General Note 39, and replace with the following: 39. All underground flanges with or without concrete encasement,

and requiring Type B coating, shall have heat shrink sleeves as specified in Section 09890.

QUESTIONS AND CLARIFICATIONS:

Requests for clarification of details on the drawings or of provisions of the specifications have been identified. The questions with the appropriate Metropolitan responses are as follows:

(1) Question: Sheet C-325.4, Section C: What coating is required for flanges and miter weld on the elbow located immediately below the vacuum valve?

Answer: According to Construction Note 1 on Sheet C-325.2, and Sheet M-1, Detail 2, Type A coating shall be used.

(2) Question: Heat shrink sleeves as specified in Section 09890 are to be used as Type B coatings for flanges on underground piping less than 48 inch diameter. Is the intention to use heat shrink sleeves on all underground flanges that are not encased in concrete?

Answer: No. Heat shrink sleeve is required on all underground flanges with or without concrete encasement. See Changes to Drawings in this addendum.

END OF ADDENDUM

BIDDER NAME: _____________________________

November 5, 2009 00310-1 1623 (construction contract) (Addendum 1)

DOCUMENT 00310 BIDDING SHEET

Price for construction of Air Release and Vacuum Valve Relocation for Treated Water Pipelines

Construction Package No. 8

Item Description Quantity Unit Unit Price

Amount

1. Mobilization for the lump sum of 1 L.S. L.S. $ 100,000

2. Perform abatement of asbestos-containing material at the existing air release/vacuum valve assemblies as specified in Section 02113.

26 Assemblies $_______ $________________

3. Construction of all work in the contract, except for work covered under the other bid items on this bidding sheet, as specified and shown on the drawings for the lump sum of L.S. $________________

Total Items 1 through 3

$________________

END OF DOCUMENT

PUBLIC AGENCY CONTACT INFORMATION

City of Anaheim Public Works – City Hall East 200 S. Anaheim Blvd. #276 Anaheim, CA 92805 Joann Wu (714) 765-5157 Tri Nguyen (714) 765-5149 (Plan Checker) City of Buena Park PW Dept. – Engineering Div. P.O. Box 5009 Buena Park, CA 90622-5009 Nabil Henein (714) 562-3685 Kenneth Kim (714) 562-3688 City of Garden Grove Engineering Department 13802 Newhope Street Garden Grove, CA 92843 Sam Kim (714) 741-5534

City of Orange Dept. of Public Works Eng. 300 E. Chapman Ave. Orange, CA 92866-1591 George Liang (714) 744-5525 City of Tustin Dept. of Public Works Eng. 300 Centennial Way Tustin, CA 92780 Katy Lee (714) 573-3177 [email protected] City of Yorba Linda Engineering Department P.O. Box 87014 Yorba Linda, CA 92885 Lorie Wolf (714) 961-7174 Mary Busch (714) 961-7170

October 2009 01060-5 1623 Addendum 1

mailto:[email protected]

October 19, 2009 15060-1 1623 (Construction contract Addendum 1

SECTION 15060 GENERAL MECHANICAL PIPING

PART 1 GENERAL

1.01 REFERENCES

A. General

1. The publications listed below form a part of this specification to the extent referenced herein. In the event of a conflict between the text of this specification and the references sited herein, the text of this specification shall take precedence.

2. Where a date is given for reference standards, that edition shall be used. Where no date is given for reference standards, the latest edition available on the date of the Notice Inviting Bids shall be used.

B. American National Standards Institute (ANSI)

1. ANSI/NSF 61, Drinking Water System Components - Health Effects

C. American Society of Mechanical Engineers (ASME)

1. ASME Boiler and Pressure Vessel Code (BPVC)

a. BPVC Section V Nondestructive Examination

b. BPVC Section VIII Rules for Construction of Pressure Vessels

2. ASME B1.1, Unified Inch Screw Threads (UN and UNR Thread Form)

3. ASME B16.5, Pipe Flanges and Flanged Fittings

4. ASME B31.1, Power Piping

5. ASME B31.3, ASME code for Pressure piping

6. ASME B36.10, Welded and Seamless Wrought Steel Pipe

D. American Society for Nondestructive Testing Inc. (ASNT)

1. ASNT SNT-TC-1A, Recommended Practice

E. American Society for Testing and Materials (ASTM)

1. ASTM A53, Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

2. ASTM A105, Standard Specification for Carbon Steel Forgings for Piping Applications

3. ASTM A181, Standard Specification for Carbon Steel Forgings, for General-Purpose Piping

4. ASTM A182, Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

5. ASTM A194, Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High-Pressure and High-Temperature Service

6. ASTM A515, Standard Specification for Pressure Vessel Plates, Carbon Steel, Intermediate- and Higher-Temperature Service

7. ASTM A516, Standard Specification for Pressure Vessel Plates, Carbon Steel, Moderate- and Lower-Temperature Service

8. ASTM D149, Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

9. ASTM E94, Standard Guide for Radiographic Testing

10. ASTM E142, Standard Method for Controlling Quality of Radiographic Testing

11. ASTM E165, Standard Test Method for Liquid Penetrant Examination

General Mechanical Piping

1623 15060-2 October 19, 2009 Addendum 1 (construction contract)

12. ASTM F104, Standard Classification System for Nonmetallic Gasket Materials

13. ASTM F436, Standard Specification for Hardened Steel Washers for General Use

14. ASTM F844, Specification for Washers, Steel, Plain(Flat), Unhardened for General Use

F. American Welding Society (AWS)

1. AWS A5.1, Specification for Carbon Steel Electrodes for Shielded Metal Arc Welding

2. AWS A5.18, Specification for Carbon Steel Filler Metals for Gas Shielded Arc Welding

3. AWS A5.20, Specification for Carbon Steel Electrodes for Flux-Cord Arc Welding

4. AWS A5.28, Specification for Low Alloy Steel Filler Metals for Gas Shielded Arc Welding

5. AWS D1.1, Structural Welding Code Steel

G. California Plumbing Code (CPC)

H. Society for Protective Coatings (SSPC)

1. SSPC SP-1, Solvent Cleaning

2. SSPC SP-2, Hand Tool Cleaning

3. SSPC SP-3, Power Tool Cleaning

4. SSPC SP-5, White Metal Blast Cleaning

5. SSPC SP-6, Commercial Blast Cleaning

1.02 SUBMITTALS

A. Submittals shall be in accordance with Section 01300, “Submittals”.

B. Product Data: Manufacturer's data and printed recommendations shall be submitted on the following:

1. Technical data, including recommendations for storage, for all components of each piping system.

2. Welding materials.

3. Representative catalog cut for each different type of item indicating materials of construction, important dimensions, and range of pipe sizes for which that item is suitable.

C. Structural Calculations: Provide structural calculations for the design of all pipe supports, hangers, guides, seismic restraints, and anchors. The Contractor shall employ a California Registered Civil or Structural Engineer to prepare design calculations for all supports, hangers and accessories and for seismic restraint needed for piping and equipment installation. Calculations and shop drawings shall be signed by the above named engineer and submitted to the Engineer. Seismic forces shall be based upon the criteria in Section 01650, “Pipe, Duct, Cable Tray, Raceway, and Bus Duct Supports and Seismic Bracing”.

D. Shop Drawings

1. Shop drawings of pipe and fittings for each piping system shall be submitted showing complete layout plans and the following information:

a. Design Pressure and Hydrostatic or Pneumatic Test Pressure.

b. The length and designation, by number, of each shop-fabricated pipe section and fitting.

c. The complete material description and pipe-centerline location and elevation at changes in grade or horizontal alignment.

d. Details of welding, non-destructive testing, and protective coatings for each shop-fabricated pipe section and fitting.

e. Location, type, and details of all supports, hangers, guides, seismic restraints and anchors. Include magnitude of load transmitted to the structure at each location, magnitude, and direction of thermal expansion and thrust forces, and type of expansion fittings, anchor, guide, and other pipe supporting appurtenances including structural fasteners.


October 19, 2009 15060-3 1623 (construction contract) Addendum 1

E. Plans and Procedures

1. Prior to the start of fabrication, a detailed schedule for fabrication of piping and special fittings shall be submitted.

2. The following additional plans and procedures shall be submitted:

a. Welding Procedure Specifications (WPSs)

b. Welding Procedure Qualification Records (PQRs)

c. Welder Performance Qualifications (WPQs) for welders and welding operators to be employed on the work

d. Contractor Quality Assurance plan outlining testing, inspection and documentation

e. Preheat and interpass procedures, including temperatures

f. Procedure for heat treatment and stress relieving

g. Procedure for shop hydrostatic testing, submitted 10 working days prior to start of tests

h. Non-Destructive testing (NDT) procedures for shop and field testing.

F. Certifications

1. Certifications for compliance with shop cleaning, field cleaning and testing shall be submitted.

2. Certificate of qualification for each welder and record of welding procedures in accordance with ASME BPVC Section IX shall be submitted. Certifications shall include qualifying dates and name of the firm or individual certifying the qualification tests.

3. Certificate of qualification for each nondestructive testing technician and operator shall be submitted. Nondestructive testing technicians and operators shall be qualified to a minimum of NDT Level II. Development of procedures and techniques, and code interpretation shall be performed by ASNT SNT-TC-1A, Level III technician.

4. Pipe materials that are in contact with potable water or recovered water which may be treated for use as potable water shall be certified for use in potable water applications. Certification shall be provided from ANSI, NSF 61, EPA, FDA, or USDA that pipe, fittings, lubricants, and elastomeric material products are approved for incorporation into potable water systems.

5. Non-Destructive Test (NDT) reports and weld maps for shop and field testing shall be submitted.

6. Material Test Reports (MTRs) for all proposed materials.

1.03 GUARANTY

A. The Contractor shall warrant and guarantee the equipment in accordance with Section 01740.

1.04 DELIVERY, STORAGE, AND HANDLING

A. Provisions shall be made in handling, loading, unloading, and storing of pipe and fittings to avoid distortion, scratches, gouges, cracks, dents, and scuffing. Pipe and fittings shall be stored in a flat, horizontal position, protected from the elements until ready for installation.

B. Nonmetallic pipe shall not be stacked.

C. At all times, plastic pipe shall be supported for the full length of the pipe and protected from ultraviolet exposure. Pipe that has been damaged or distorted shall be replaced.

D. In the event that during storage coated pipe is subjected to ultraviolet exposure longer than 90 calendar days, it shall be physically inspected prior to installation in the trench. UV-degradation will be evaluated by the Engineer. Where, in the opinion of the Engineer, the degree of degradation will not affect the integrity of the coating, the Engineer may allow the installation of the pipe; otherwise, the affected section will be rejected.

E. Components of the pipe-joint sealant system shall be delivered to the jobsite in original, unopened containers with the manufacturer's name, labels, product identification, and batch numbers legibly displayed. Components shall be stored in clean, dry, protected areas in which ambient temperatures do not fall below 50° F or rise above 95° F.



PART 2 PRODUCTS

2.01 GENERAL

A. All piping shall be built and installed in accordance with the following codes, unless otherwise specified.

1. ASME B31.1 for industrial and HVAC piping.

2. ASME B31.3 for hydrocarbon and chemical piping.

B. Types and quantities are set forth in the drawings and equipment list.

C. All equipment furnished shall be new, unused, and manufactured in accordance with these specifications and the latest manufacturing practices.

D. Equipment shall be tested according to the manufacturer's specifications, and as detailed herein. The Contractor shall furnish all necessary labor, materials, and equipment required for testing and shall accomplish the required tests at no additional cost to Metropolitan.

E. Equipment inspection shall be done at the factory and/or final destination.

F. Furnish all labor, materials, equipment, and incidentals, and install complete piping systems including all hangers, supports, restraints, structural connections, concrete inserts, anchor bolts, and expansion units.

G. Product Marking

1. All material shall be marked in accordance with the applicable ASTM standards and shall include the heat number.

2. Material shall be eligibly marked at the source of manufacture.

3. Any material not containing the heat numbers shall not be allowed in fabrication and will not be acceptable.

H. Line Description

1. Each principal system of piping is identified on the drawings by a line number which designates pipe size and material. No omission in the line numbers from the drawings shall be construed to relieve the Contractor from furnishing and installing all piping called for on the drawings in accordance with the requirements noted thereon. The material specifications letters shown on the drawings are referenced to sections of these specifications in accordance with the following Table 1:

Table 1 - Line Designations

Material Specificatio

n Designation

Description

Specification

Section Reference

A Carbon Steel, Mortar-Lined, Class 150 15065 C Copper Tubing and Fittings [C-pipe] 15077

I. Joint Compound

1. Joint compound for threaded pipe joints shall be a Teflon compound, applied only to the male section of threaded joints.

a. Acceptable Products: Radiator Specialty Co., Bakerseal; or equal.

J. Joint Putty

1. Joint putty shall be a non-sag epoxy formulation.

2. Acceptable Products: Sika Corp., Sikadur No.31; Select Products, GP-3000; or equal.



K. Flanges

1. Unless otherwise shown on the drawings, the dimensions, drilling, and bolting of flanges shall be as follows:

Table 2 - Flange Code Specification by Pressure/Size/Type (see notes)

Operating Pressure

(psig) Size (NPS) Flange Type Code Class

Flange Ratings (psig)

Notes

≤ 150 ≤ 24” WNF & Hub ASME B16.5 150 275 6

≤ 150 ≤ 24” Blind, Bored Blind ASME B16.5 150 275 7,8

151 - 300 ≤ 24” WNF & Hub ASME B16.5 300 720 6

151 - 300 ≤ 24” Blind, Bored Blind ASME B16.5 300 300,720 7,8 Notes: 1) Except when otherwise stated in MWD specifications, or where otherwise shown on MWD drawings, all flange dimensions

shall comply with this table. 2) Flange material shall be per MWD specifications. Use of other material requires submittal of supporting calculations per

ASME Section VIII. 3) For operating pressures greater than listed, or for a flange size and type not listed, a specially engineered flange per ASME

Section VIII shall be used. 4) Specially engineered flanges shall be per ASME Section VIII. Supporting calculations shall be submitted for approval. 5) Flange size 42” and larger shall have 3/8” diameter o-ring per drawing. 6) Hub and WNF flanges shall not be bored. 7) Outside weld shall consist of t bevel weld and 1.4t fillet weld where t = pipe wall thickness. Inside weld shall be per drawings. 8) Does not apply to reducing flanges. Reducing flanges are specially engineered flanges. 9) Hub type flanges are limited to 40”.

Table 3 - Flange Thickness1

Size 42" 48" Thickness (in) 2 2.125

Note 1: Table 3 indicates flange thickness for Ring Type Flanges with an operating pressure between 51 psi and 150 psi, all other flange dimensions shall be per AWWA C207 Class D

2. The dimensions for drilling and bolting of flanges for pipe sizes and ratings not shown above shall be as shown on the drawings.

3. The final machining of the contact faces of flanges shall be perpendicular to the centerline axis of the pipe or fitting. Distortion, unevenness, or other irregularities in the contact faces due to welding, stress-relieving, or other cause will not be permitted. The maximum allowable layback for each welded flange shall be 3/4⁰.

4. The flange gasket surfaces shall have a V-serrated finish of approximately 32 serrations per inch approximately 1/64 inch deep, except O-ring gasket contact surfaces of flanges shall have a smooth face finish of 125 micro inches. The serrations may be either concentric or spiral (phonographic). Flange faces shall be finished to maximum roughness of 250 micro inches before serrating the flange face surfaces.

5. Flanges shall be full thickness, flat faced, and drilled. Flanges shall be spot faced or back-faced parallel to the front face.

6. Welding neck flanges, blind flanges, and slip-on flanges shall be forged steel in accordance with the requirements of ASTM A181, Class 60 or 70, or to ASTM A105.

7. Stainless steel welding neck flanges and hub flanges shall be forged steel conforming to the requirements of ASTM A182.

8. Welding neck flanges shall be bored to match the inside diameter of adjoining pipe.

9. Plate Flanges and Blind Flanges

a. Carbon steel plate flanges shall be machined from steel plate. Plate material shall be in accordance with ASTM A515 or A516, Grade 65. Plate that is in accordance with ASTM A515 or A516, Grade 70 will be



permitted subject to the preheating and interpass temperature requirements specified in this section.

b. Stainless steel plate flanges shall be machined from steel plate that is in accordance with ASTM A240.

c. Plate flanges may be fabricated from segments welded together in accordance with AWWA C207. The plates used shall have sufficient thickness to permit machining so that the finished flange will have the specified thickness with true surfaces free from defects.

d. Plate flanges shall be stress-relieved in accordance with the provisions of the ASME Boiler and Pressure Vessel Code, Section VIII, Unfired Pressure Vessels.

e. Edge rolling of bar stock to form flanges will not be permitted.

f. Blind flanges shall be forged steel conforming to the requirements for welding neck flanges or shall be plate flanges. Flange faces shall be machined flat as specified in this section.

L. Flange Gaskets

1. Flange gaskets shall be compatible with the intended service, in accordance with the specific piping material section of these specifications.

M. Flange Stud and Bolting Materials

1. General

a. Flanges shall be connected by the use of stud with a nut on each side unless otherwise approved by the Engineer.

b. Threads for studs, bolts and nuts shall be in accordance with ASME B1.1.

c. Threads for studs and bolts 1 inch and less in diameter shall be coarse-thread series and threads for bolts 1.125 inches and greater in diameter shall be the 8-pitch thread series.

d. The fit shall be Class 2 free fit; except that Class 3 medium fit shall be provided in holes tapped for studs.

e. Studs shall be used when attaching together flanges unless otherwise shown on the drawings, where bolts are specified, bolts shall have heavy hexagon heads and heavy hexagon nuts.

f. The length of studs and bolts, excluding anchor bolts, shall provide a projection of not less than 0.25 inch nor more than 0.5 inch through the nut when it is drawn tight; however, in exposed locations the projection shall not be more than 0.25 inch.

2. Carbon Steel Fasteners

a. Carbon steel fasteners shall be used only with carbon steel piping subject to a continuously dry environment. Otherwise, stainless steel fasteners shall be used as specified under “Stainless Steel Fasteners” herein below.

b. The studs and bolts for flanged connections and joint harnesses shall be machined from steel in accordance with the requirements of ASTM A193, Grade B7, except that the requirements specified herein shall control where at variance with ASTM A193. Studs shall be threaded full length, and each shall be furnished with 2 nuts.

c. Nuts shall be in accordance with the requirements of ASTM A194, Grade 2H, heavy series.

d. Carbon steel bolts installed in holes 1/8 inch or more oversize, as measured on the diameter, shall be provided with hardened steel washers in accordance with the requirements of ASTM F436 at each contact surface.

e. Anti-seize compound shall be used on carbon steel fasteners, and shall be Husk-ITT, Husky 2000; or equal.

N. Liquid Penetrant Checking Compound

1. Products for liquid penetrant inspection shall be water-washable and nonflammable.

2. Penetrant and developer shall be from the same manufacturer and shall be in accordance with ASTM E165.

3. Acceptable Products: Shop Vac Corp., Spotcheck; American Gas and Chemical Co. Ltd., Flaw-Finder, Met-L-Chek; or equal.



2.02 ACCESSORIES

D. Pipe Penetration Modular Mechanical Seals

1. The mechanical modular seal shall fill the annular space between a pipe and wall sleeve, preventing groundwater from entering an underground structure. The seal shall consist of mechanically interlocked solid synthetic links and shall form a hydrostatic, watertight seal up to 20 psig with a temperature operating range of -40 to 250°F.

2. Seal components and materials of construction:

a. Seal element shall be EPDM, 1828 psi tensile strength as tested per ASTM D412.

b. Pressure plates shall be a composite plastic or nylon polymer, 27,000 psi tensile strength.

c. Bolts and nuts shall be Type 316 stainless steel.

3. The Contractor shall provide pipe OD and sleeve ID to seal manufacturer for seal sizing. Seals shall be selected and installed per manufacturer’s recommendations.

4. Acceptable Manufacturers: PSI Thunderline Link-Seal; APS Innerlynx Modular Mechanical Seal.

E. Insulating Flange Kits

1. Insulating flanges shall be installed as shown on the drawings and per Sections 13984, “Insulating Joints” and 13985, “Pipe Bonding and Test Stations”.

F. Flange Spray Guards

1. Flange spray guards shall be installed where indicated on the drawings.

a. Guards shall be fabricated of teflon-coated fiberglass fabric, with teflon-coated fiberglass tie-down cords.

b. Guards shall be rated for 450° F.

c. Guards shall be UV-stabilized and suitable for outdoor service.

d. Guards shall include a pH indicator to indicate leakage.

e. Acceptable Products: RAMCO SPRA-GARD; or equal

G. Insulating Unions

1. Insulation unions shall be per Section 13984, “Insulating Joints”.

2.03 WELDING

A. General Requirements

1. Welding shall be performed by qualified welders having adequate experience in the methods and materials to be used. Welding and brazing procedures, welders, and operators shall be qualified in accordance with the ASME BPVC, Section IX. Welders or welding operators shall have been qualified for the process involved within the past 6 months, in accordance with ASME BPVC, Section IX, Article QW-322. The Contractor may provide documentation confirming the welder meets the welding continuity requirements per ASME Section IX.

2. Test Specimens

a. The Contractor shall conduct specimen testing of its welders to determine their ability to produce welds that are in compliance with these specifications.

b. Testing shall be made in the presence of the Engineer in accordance with the qualification procedure described herein, using machines and electrodes similar to those that are to be used on the work.

c. The test specimen shall be welded in the same position as that in which the welder is qualifying to work, and the same number of passes shall be used as are specified for the work.

d. In lieu of conducting tests, the Engineer may require that each welder be qualified by a testing agency at the Contractors own expense and approved by the Engineer and using the qualification procedure of ASME BPVC, Section IX.



e. The Engineer may require additional test specimens as the work progresses and may demand the removal of a welder whose work is questionable, regardless of the results of the test welds at the Contractors expense.

3. Identification

a. Each welder shall be assigned an identification symbol to identify his or her welding work.

b. Only 0.25- or 0.375-inch low-stress steel stencil stamps shall be used.

c. The welder's symbol shall be stamped 1 inch from the weld.

d. If more than one welder completes a joint, stamped symbols shall move outward from the weld in chronological order; the welder completing the weld shall have the furthest symbol.

e. A complete weld map, with all welders' symbols and joint numbers shall be maintained as part of the Contractors Quality Assurance Program.

B. Preparation

1. Prior to welding, the surfaces of members to be welded shall be deburred, ground smooth and thoroughly cleaned by grinding or abrasive blasting in accordance with SSPC SP-1, SSPC SP-2, SSPC SP-3, SSPC SP-5, or SSPC SP-6, as applicable. The area of cleaning, measured from the welding edge, shall be a distance of no less than 1 inch for scale and rust and no less than 3 inches for oil and grease.

2. Grease and oil shall be removed with an approved solvent in accordance with all local regulatory requirements. The use of gasoline, kerosene, or other petroleum solvent will not be permitted. Grease and oil shall be removed prior to abrasive blasting.

3. Abrasive blasting and other cleaning shall be done prior to tack-welding..

C. Welding Process Restrictions

1. Subject to prior approval of the Engineer, gas metal arc-welding (GMAW) of the shielded spray and pulsed-current weld processes, and using materials in accordance with AWS A5.18 and AWS A5.28, are acceptable. Procedure qualification shall include the type of material, joint design, filler-wire designation, shielding gas, welding position, and sequence of application. Short-circuiting GMAW shall not be used.

2. Gas tungsten arc-welding (GTAW) with an internal inert-gas purge shall be used for the root and second pass using materials in accordance with AWS A5.9, AWS A5.18, or AWS A5.28. Carbon dioxide shall not be used as a shielding gas for stainless steel welding. Only nitrogen and argon are acceptable as purging gases for stainless steel.

3. The oxygen-fuel welding (OFW) process shall not be used.

4. Fully automatic submerged arc-welding (SAW) shall be used only with approved electrode wires and fluxes equivalent to F7A2-EM12K, as specified in the welding procedure qualification record. Individual weld layers exceeding 0.375 inch in thickness shall not be deposited.

5. Without prior approval of the Engineer, SMAW shall not be used for the root pass in stainless steel weldment from one side.

6. Covered arc-welding electrodes shall be in accordance with AWS A5.5 or AWS A5.1, low hydrogen type, classification No. E70XX.

7. Electrodes in accordance with AWS A5.20 shall be used for flux-corded arc-welding (FCAW), classification E71T-X, low hydrogen. Auxiliary gas shielding is mandatory.

D. Temperature and Heat Treatment Restrictions

1. The minimum metal temperature for welding shall be 50° F, unless a higher value is specified in AWS D1.1.

2. The preheat temperature shall be determined by temperature-indicating crayons, contact pyrometers, or other suitable devices.

3. Preheating and interpass temperatures shall be maintained for all welding procedures, including rewelding made necessary due to defects, in accordance with the qualified welding procedure.



4. Postweld heat treatment, if required by the Engineer, shall be in accordance with the ASME BPVC and only after all welding for piping work has been completed. In no case shall the postweld heat treatment temperature exceed the tempering temperatures for normalized and tempered materials. Welds suspected of sensitization shall be full solution annealed at 1900° F and quench cooled.

5. The minimum hold time for postweld heat treatment shall be one hour for ferritic steels. The heating rate shall be limited to 400° F per hour, maximum, above 600° F of the stress-relief temperature. The cooling rate from the stress-relief temperature shall be 400° to 600° F per hour.

6. Preferably, postweld heat treatment shall be done in a furnace. Stacking of components in the furnace will not be permitted. Localized postweld heat treatment not done in a furnace may be accomplished by electric resistance or induction heating, subject to the following restrictions:

a. A full circumferential band shall be heated to the required temperature.

b. The thermal gradient at the extremities of the heat band shall not exceed 150° F per foot.

c. The heater band shall extend on each side of the joint by 5 times the wall thickness.

7. Calibrated recording instrumentation shall be used to document all stress relief.

E. Attachments

1. Nozzle and coupling attachments shall be Type 316L material, set-in type, as detailed on the contract drawings. Drilled-through set-on-type is acceptable, provided a full penetration weld is achieved and the corresponding pipe is stainless steel.

a. The root pass and outer weld shall be subjected to liquid-penetrant examination.

b. The Contractor shall perform visual inspection on both internal and external surfaces.

2. Weldolet, Thredolet, or equal attachments shall be Type 316L material, set-on type, as detailed in the contract drawings.

3. Holes in pipe shall be bored to the inside diameter of the Weldolet.

4. A 0.125-inch root opening at the lowest point shall be provided to ensure complete joint penetration.

5. Both root and cover passes shall be inspected by liquid penetrant examination.

6. Fittings shall be welded out to the first break in contour, or flush with the outer edge of the fitting. Partial weld-out will not be permitted.

2.04 CARBON STEEL WELDING

A. Welding shall be by the unvarying arc welding process that excludes the atmosphere during the process of deposition while the metal is in a molten state. The size and type of electrode to be used and the current and voltage required shall in all cases be subject to the approval of the Engineer. The type of wire and flux to be used for automatic processes shall also be subject to the approval of the Engineer.

B. Rusted or otherwise damaged electrodes shall not be used; violation of this provision shall be sufficient cause for rejection of the work. Used flux from automatic welders shall be sifted free of fines and coarse pieces and shall have mill scale completely removed before reusing.

C. Welds shall be of uniform composition, neat, smooth, full strength, and ductile. Each weld shall be made with a technique that will ensure uniform distribution of load throughout the welded section, with a minimum tendency to produce eccentric stress or distortion in the weld or in the adjacent metal. The maximum height of the weld reinforcement shall be 3/32 inch

D. Where possible for hand butt-welds and other hand welds, but excepting plain 90-degree fillet welds, the edges of the plate shall be prepared so that there will be sufficient angle in the welding grove to prevent side-arcing of the electrode and to permit penetration at the deepest point of the groove. These welds shall be back-chipped from the side of deepest penetration on the reverse side before welding is done on the front side. Each hand pass and each back-chipped welding groove shall be subject to inspection before the ensuing pass is made.



E. For hand welds, no more than 0.125 inch of metal shall be deposited in each pass. Each pass shall be thoroughly cleaned to afford visual inspection. Each pass shall be thoroughly fused into the sides; fillet weld passes shall not be permitted to pile up in the center of the weld. Undercutting is not permissible.

F. When welding is resumed after the normal welding process is interrupted for any reason, special care shall be taken to get full penetration and thorough fusion between the previously deposited weld metal and the weld metal and plates. Where welding is interrupted by faulty machine operation, that portion of the weld shall be removed by chipping before resuming the welding operation, subject to approval of the Engineer.

G. Pipe sections that show irregularities in shape after welding may be rerolled to make them cylindrical. Reforming by hammering will not be permitted. Pipe sections that have abrupt changes in curvature at longitudinal weld seams shall not be reformed unless the welds are subsequently removed and the pipe rewelded following the reforming operation.

2.05 BRAZING

A. Brazing of copper and brass pipe and fittings shall be in accordance with Section 15077, “Copper Tubing and Fittings [C-Pipe]”, and ASME BPVC, Section VIII, Part UB.

2.06 SHOP FINISHES AND CLEANING

A. Shop finishes and cleaning shall be in accordance with the specific piping material section of these specifications.

2.07 SOURCE QUALITY CONTROL

A. The Engineer shall have access to all phases of fabrication for inspection and shall be notified a minimum of 2 weeks prior to start of fabrication. Materials or fabricated parts that are discovered to be defective or that are not in accordance with these specifications shall be subject to rejection at any time of fabrication.

B. Contractor shall establish a Quality Assurance program that ensures compliance to requirements of this specification. The program shall document the all welds are made by qualified welders/operators and that all welds are mapped and have been tested to meet the requirements of this specification.

C. The Engineer will audit the Quality Assurance program to ensure compliance to this specification

D. Nondestructive Examination: Each weldment shall be examined and measured to ensure conformance to these specifications as follows:

1. General a. Weld examination shall include shop fabrication and field welding. b. Nondestructive testing shall be in accordance with ASME Section V and VIII.

c. If the Engineer determines that the method of nondestructive testing specified cannot be used under conditions encountered in the work, an alternate method of inspection will be determined by the Engineer.

d. There shall not be evidence of oxidation in the weld metal.

e. Welds shall be free of cracks, pinholes, porosity, slag, and undercut.

f. Welding that is not acceptable and defective welds shall be chipped out and rewelded, and the affected joints shall be checked again by nondestructive testing for acceptance of the repaired welds.

g. Nozzle and branch connection (including weldolet, sockolet, threadolet, and coupling) root welds shall be backgouged to sound metal and examined by the liquid-penetrant method prior to final welding.

h. All welds shall be 100% visually inspected.

2. Radiography

a. All girth and mitered groove welds are to be tracked and random radiography tested as follows:

(1) The first weld a welder produces shall be radiographed. This radiograph does not count towards a welder’s percentage of welds radiographed.

(2) Thereafter, 5% of the welds each welder producers shall be randomly radiographed as directed by the Engineer.



(3) The acceptance criteria shall be per ASME Section VIII, UW-51.

(4) Progressive sampling for examination will be conducted as described in ASME B31.3 341.3.4

b. Butt-welds on NPS-2 diameter or smaller shall be subject to 100% radiography.

3. Liquid Penetrant Testing

a. All butt welds shall be liquid penetrant tested at the root and cover passes and shall be subject to inspection by the Engineer.

b. The cover pass for all socket welds shall be liquid penetrant tested.

c. All plug welds shall be liquid penetrant tested.

d. When joints are modified to provide tapered transition reinforcement at joint offsets, the weld-metal buildup shall be examined over the full surface of the deposit by liquid-penetrant examination.

e. Welds not tested by the soap and compressed air test shall be tested by the liquid-penetrant inspection method (on all root and final weld passes).

f. Where temporary attachments have been made, the base metal shall be tested by liquid penetrant and shall be inspected for base metal tears.

g. Welds shall be evaluated in the basis of the requirements provided in subparagraph 2.07.D.1.e herein above. No defects are allowed.

4. Soap and Compressed Air Testing

a. Slip on flanges and joints susceptible to this test shall be tested by the soap and compressed air method.

b. As soon as practicable after completion of the welding of joints that are to be tested by the soap and compressed air test, the Contractor shall subject each joint to a soap test by forcing compressed air, at approximately 15 psi, into each joint. While the joint is under pressure, every portion of every welded seam forming a part of the joint shall be swabbed with a heavy soap solution or an approved, commercial, bubble-producing leak-test fluid and shall be carefully examined for leakage.

c. The Contractor shall provide the apparatus and materials for making the tests, shall drill and tap the necessary holes, and shall plug-weld the holes after testing. The plug welds shall be penetrant tested.

2.08 PIPE SUPPORTS AND ACCESSORIES

A. The Contractor shall provide pipe supports for all piping systems shown on the drawings. All pipe supports shall be hot-dipped galvanized unless otherwise noted.

1. All supports and bracing shown on the drawings are intended only to convey design intent. Support and bracing locations are the responsibility of the Contractor. Not all pipe supports and bracings are shown on the drawings. The absence of pipe supports and bracing on the drawings shall not relieve the Contractor for the responsibility for providing them.

2. Pipe hangers, supports, and restraints design and construction shall be coordinated with all electrical, plumbing, and HVAC hangers and supports to prevent conflicts. Electrical, plumbing, and HVAC supports may be combined with piping supports only where permitted by applicable codes. Refer to Sections 01650, “Pipe, Duct, Cable Tray, Raceway, and Bus Duct Supports and Seismic Bracing,” 15140, “Plumbing and Fire Protection Piping Supports and Anchors,” 15890, “Ductwork and Accessories,” and 16110, “Raceways,” for additional requirements, as applicable.

B. Design Responsibility

1. The Contractor shall engage the services of an independent registered professional engineer ordinarily engaged in the business of pipe support systems analysis, to analyze system piping and service conditions, and to develop detailed support and seismic restraint systems, specific to the piping material, pipe joints, valves, and piping appurtenances proposed for use.

a. The proposed support system engineer shall have at least 5 years of experience in the analysis and design of similar systems, including the use of commercial and custom pipe supports and in the use of commercial pipe



stress software programs. Provide a detailed resume, including references from projects within the past 5 years. The use of support systems engineer shall be subject to the approval of the Engineer.

2. The proposed systems engineer shall attend a conference with the Engineer, scheduled prior to any support systems design.

3. Submit a draft report to the Engineer for approval.

a. After the work is installed, but before it is filled for start-up and testing, the support system design engineer shall inspect the work and shall certify its complete adequacy. Each system shall be inspected and certified in the same way.

b. Submit a report, including all field modifications and including all certificates.

c. The report shall bear the stamp of a professional engineer registered in California and shall be subject to the approval of the Engineer.

4. Prepare for and attend a post-analysis review and presentation, after the Engineer’s review of the report. Revise per the comments and issue as Final Report.

C. Design Requirements

1. The support system design shall include:

a. Criteria by piping system.

b. Summary of Contractor-selected related components including joints, class, valves, appurtenances, etc., and commercial supports and especially including pipe materials.

c. Dead weight and dynamic analysis, including system thermal effects and pressure thrusts. Computer-based software system equivalent to ADLPIPE.

(1) Each system shall be presented in an isometric graphic and shall show the resolved and resultant force and moment systems, as well as all recommended hangers, supports, anchors, restraints, and expansion/flexible joints or expansion loops.

d. All aspects of the analysis and design shall comply with the provisions of ANSI B31.1 and the referenced standards.

e. Support arrangements shall be coordinated to eliminate interference with similar systems to be installed under HVAC, Plumbing, and Electrical; to account for structural expansion joints; and to maintain access for both personnel and for the removal of equipment. Support systems shall not include the use of monorail or bridge crane support. Nor shall they rely on the horizontal structural struts.

2. Seismic Restraints

a. Seismic restraints shall be designed and provided to resist pipe movements and loads occurring as a result of an earthquake or other seismic event. Unless otherwise specified, all piping shall have bracing to resist seismic loading caused by forces applied at the individual pipe’s center of gravity. Seismic design requirements shall be in accordance with Sections 01640, “Equipment Anchorage,” and 01650, “Pipe, Duct, Cable Tray, Raceway, and Bus Duct Supports and Seismic Bracing.”

3. All supports and appurtenances shall be of approved standard design, unless otherwise acceptable to the Engineer, and shall be adequate to maintain the supported load in proper position under all operating conditions. Any reference to a specific figure number of a specific manufacturer is for the purpose of establishing a type and quality of product and shall not be considered as proprietary.

4. All items shall be designed with liberal strength and stiffness to support, restrain, and allow expansion of the respective pipes under the maximum combination of peak loading conditions to include pipe weight, liquid weight, liquid movement and pressure forces, thermal expansion and contraction, vibration, insulation, valve weight, fittings, and all probable externally applied forces.

5. All of the equipment specified herein is intended to support, restrain, and allow expansion of the various types of pipe and piping systems shown on the drawings. It shall be the responsibility of the Contractor to develop final details and any details associated with special conditions not already covered to meet the system conditions (in particular system temperatures and pressures) specified in the respective Divisions 2, 11, 13, and 15.



6. Supports shall be sufficiently close together such that the sag of the pipe is within limits that will permit drainage and avoid excessive bending stresses from concentrated loads between supports.

7. Complete design details of the pipe system components shall be submitted for review and approval as specified under Submittals article herein above. No support shall be installed without the written approval of the Engineer.

8. All pipe and appurtenances connected to equipment shall be supported in such a manner as to prevent any strain being imposed on the equipment. When manufacturers have indicated requirements that piping loads shall not be transmitted to their equipment, submit certification stating that such requirements have been complied with.

9. All pipe and tubing shall be supported as required to prevent significant stresses in the pipe or tubing material, valves, fittings, and other pipe appurtenances, and to support and secure the pipe in the intended position and alignment. All supports shall be designed to adequately secure the pipe against excessive dislocation due to thermal expansion and contraction, internal flow forces, and all probable external forces such as equipment, pipe, and personnel contact. Any structural steel members required to brace any piping from excessive dislocation shall conform to the applicable requirements of Section 05500, “Miscellaneous Metals,” and shall be furnished and installed under Section 15060, “General Mechanical Piping.”

10. Contractor may propose minor adjustments to the piping arrangements in order to simplify the supports, or in order to resolve minor conflicts in the work. Such an adjustment might involve minor change to a pressure pipe centerline elevation so that a single trapeze support may be used. Elevations of drain lines shall not be modified without the permission of the Engineer.

11. Where flexible sleeve, split ring, vibration, or other couplings are required at equipment, tanks, etc., the end opposite to the piece of equipment, tank, etc., shall be rigidly supported to prevent transfer of force systems to the equipment. No fixed or restraining supports shall be installed between a flexible coupling and the piece of equipment.

12. Pipe supports shall not induce point loadings but shall distribute pipe loads evenly along the pipe circumference.

13. Supports shall be provided at changes in direction and elsewhere as shown in the drawings or as specified herein. No piping shall be supported form other piping or from metal stairs, ladders, and walkways, unless specifically directed or authorized by the Engineer.

14. Pipe supports shall be provided to minimize lateral forces through valves, both sides of flexible split ring type couplings and sleeve type couplings, and to minimize all pipe forces on pump housings. Pump housings shall not be utilized to support connecting pipes..

PART 3 EXECUTION

3.01 INSTALLATION

A. Preparation: Before beginning installation, the interior of pipe, fittings, and appurtenances shall be thoroughly cleaned of scale, dirt, and foreign substances. The surfaces of exposed piping shall be kept free of marks and blemishes to provide an appearance and finish to the satisfaction of the Engineer. Provision shall be made to avoid abrasion of surfaces to be exposed.

B. Alternative Piping

1. The Contractor shall not install any alternative piping until he has obtained written approval from the Engineer.

2. Any installed piping not approved and subsequently found unsatisfactory shall be removed at the expense of the Contractor.

C. Laying

1. Each piping system shall be installed accurately to the indicated alignment and grade, to the satisfaction of the Engineer, and in accordance with approved shop drawings.

2. The routing of tube or pipe lines may be changed to avoid obstructions only with the prior approval of the Engineer.



D. Threaded Joints

1. Where piping is assembled with threaded joints, unions shall be installed in lateral alignments with mains and on the upstream and downstream sides of equipment, even when the unions are not shown on the drawings.

2. Unions shall be installed in accessible locations.

E. PVC Piping Systems: In PVC piping systems, Designation A or E pipe shall be used where shown on the drawings for miscellaneous short spools adjacent to valves or other equipment.

F. Galvanic Isolation: Galvanic isolation shall be provided between piping of dissimilar materials by means of insulating flanges or insulating unions in accordance with Section 13984, “Insulating Joints”. For purposes of galvanic isolation, piping Designations A, T, and GG are similar carbon steels; piping designations E, O and LL are similar stainless steels; and piping Designations B, C, and Z are similar copper alloys.

G. Embedment

1. Piping of Designations B, C, O and BB shall not be embedded or encased in concrete unless otherwise specified or ordered.

2. Where a portion of piping of Designations B, C, O or BB is shown as embedded or encased in concrete, that portion shall be of an alternative material as listed below, but in all cases subject to the Engineer's approval.

Table 4

Piping Designation as Shown Alternative Material for Embedded

or Encased Portions B or C Z or E

BB R, U, Y, or E * O E

*Choice based on service fluid compatibility with pipe interior

H. Cathodic Protection: Buried pipe with Type D or E coating, as defined in Section 09875, “Pipe Coating Systems (Type B and Type D),” shall have a supplemental cathodic protection system installed in accordance with Section 13990, “Cathodic Protection System – Galvanic Anode,” and shall have insulating flanges, dielectric unions, or dielectric couplings installed where pipes are above ground or become exposed.

3.02 FIELD WELDING

A. Field welding shall be as specified under the Welding article herein above.

3.03 FIELD QUALITY CONTROL

A. Testing of field welding shall be in accordance with the tests specified under Source Quality Control article herein above.

3.04 PIPING SYSTEM CLEANING

A. Cleaning shall be performed as required during assembly, and prior to pressure testing.

B. The following piping systems shall be cleaned by purging with oil-free, dry, compressed air: oil, fuel, gas, service air, instrument air, and water-free chlorine. Piping for water-free chlorine shall be certified clean by a qualified third party approved by the Engineer.

C. Piping systems for water service and water treatment chemicals in liquid form shall be flushed out with clean, potable water. Piping shall be dried thoroughly after flushing.

3.05 PRESSURE TESTING OF PROCESS AND SERVICE PIPING

A. Testing of plumbing, drainage and venting systems shall be performed with water or air in accordance with the requirements of the UPC.

B. Pneumatic Pressure Testing of Process and Service Piping

1. The following piping systems shall be tested pneumatically: oil, fuel, gas, service air, instrument air, water-free chlorine, LOX, supplemental nitrogen gas, oxygen gas, ozone-in-oxygen gas, ozone off-gas / vent gas, and contactor maintenance air.



2. Testing for Oil, Fuel, Gas, and Air Piping

a. Prior to testing, precaution shall be taken to isolate or otherwise protect each instrument from pressures that exceed the normal operating pressure of the instrument.

b. Each system shall be tested with soap and compressed air at 150 psi. Every portion of every joint shall be swabbed with a heavy soap solution or with an approved commercial bubble-producing, leak-test fluid and shall be carefully examined for leakage. Joints that exhibit leaks shall be repaired. Repairing and testing shall be repeated as often as necessary to provide a system in which there will be no visible signs of leakage nor a drop in the 150 psig test pressure in 2 hours.

C. Hydrostatic Testing of Process and Service Piping

1. Preparation

a. The Contractor shall furnish meters for measuring the water used; all necessary certified backflow prevention devices as appropriate; valves and fittings for making connections to outlets; and hoses, piping, pumps, and other materials required to convey water to the test locations.

b. The Contractor shall provide suitable calibrated tanks or flowmeters for the measurement of leakage, and shall furnish the piping, gauges, pumps, electrical power, labor, and anything else required for filling the pipeline to be tested and for obtaining and maintaining the required water pressure.

c. Prior to the test-filling of process piping, the pipeline shall be backfilled between field-welded joints, flanges, and outlets to restrain the pipeline during hydrostatic testing. Until the hydrostatic test has been accepted by the Engineer, field-welded joints, flanges, and outlets shall be left visible and accessible for inspection except as otherwise directed by the Engineer. The piping shall not be enclosed in a manner that will prevent inspection during the test.

d. Pipelines that do not have valves shall be closed with blind flanges or caps on the ends of the sections to be tested.

e. Pipelines shall be properly braced before tests are conducted. On lines that require thrust blocks, the thrust blocks shall have been placed and the concrete shall have set to the satisfaction of the Engineer before the test is conducted.

f. At the end of the test section of pipeline, the Contractor shall provide adequate anchorage to restrain the pipe during the test. The design of the anchorage shall be submitted for approval. These anchorages shall be removed upon completion of the test.

g. Just prior to hydrostatic testing, the piping shall be cleaned or flushed out with clean water to the satisfaction of the Engineer so that it is free from obstructions, dirt, or other foreign matter.

h. The Contractor shall provide the labor, material, and equipment required to obtain, use, and dispose of the water used for test purposes. The quality of water shall be acceptable to the Engineer.

i. Water used for hydro testing shall be chlorine free, with less than 50 ppm chlorides.

j. After a test section has been filled with water, it shall be allowed to stand under pressure for sufficient time to allow air to escape before testing. Air and vacuum valves or corporation stops shall be installed to remove air from high points of the pipeline.

k. The Contractor shall be responsible for damage to the pipe as a result of pressure imposed during the pipe-filling operations and during testing. At the end of testing, the pipeline shall be restored to a condition satisfactory to the Engineer.

2. Safety

a. A safety relief valve shall be added to the system to protect equipment from accidental overpressure during the hydrostatic testing of lines and equipment. This valve shall be set at 10 percent above the calculated hydrostatic test pressure.

b. Permanently installed instrumentation shall be removed from the pipe prior to testing. As determined by the Engineer, pumps and other permanently installed equipment that might be damaged during testing shall also be removed or isolated.



3. Test Requirements

a. Hydrostatic test pressures shall be based on the lowest point of the line or section of line being tested.

b. Leakage will not be allowed.

c. Unless stated otherwise the hydrostatic pressures shown in Table 5 shall be applied for duration of at least 2 hours.

Table 5 - Hydrostatic Test Pressure

Pipe and Fitting Type Metropolitan Designation Code for Piping

Hydrostatic Test Pressure (psig)

Copper tubing C 1.5x Design Pressure

d. Regardless of the rate of leakage, detectable leaks shall be stopped. The Contractor shall excavate as necessary, including the removal of backfill already placed, to locate and repair leaks or other defects that may develop during testing. After making the repairs necessary to secure the required water tightness in the pipe or in its appurtenances, the Contractor shall replace the excavated materials, refill the affected reach of pipeline, and then repeat testing until the test results are found to be satisfactory. The Contractor shall be responsible for dewatering necessary as a result of defects.

e. The Contractor shall be responsible for purging all pipe, valves, tanks, and appurtenances after the hydrostatic test is completed. Closed-loop (hydronic) system piping shall be completely dried after testing and shall be kept clean and dry until charged with conditioned cooling/heating water.

END OF SECTION


SECTION 15075 BRASS PIPE AND FITTINGS [Z-PIPE]

PART 1 GENERAL

1.01 REFERENCES

A. General

1. The publications listed below form a part of this specification to the extent referenced.

2. Where a date is given for reference standards, the edition of that date shall be used. Where no date is given for reference standards, the latest edition available on the date of Notice Inviting Bids shall be used.

B. American National Standards Institute (ANSI)

1. ANSI B16.15, Cast Bronze Threaded Fittings, Classes 125 and 250

2. ANSI B120.1, Pipe Threads, General Purpose (Inch)

C. American Society for Testing and Materials (ASTM)

1. ASTM B43, Standard Specification for Seamless Red Brass Pipe, Standard Sizes

2. ASTM B62, Standard Specification for Composition Bronze or Ounce Metal Castings

1.02 SUBMITTALS:

A. Product Data: The Contractor shall submit material specifications and catalog cuts including recommendations for delivery, storage, and handling.

B. Certification: Written certification that all materials and testing are in accordance with the requirements of this section shall be furnished.

PART 2 PRODUCTS

2.01 MATERIALS

A. Unless otherwise specified or shown on the drawings, materials shall conform to the following:

1. Pipe

a. Brass pipe shall be seamless red brass pipe, standard sizes, extra strong , conforming to ASTM B43 temper H58.

b. Threadings; Pipe threads shall be per ANSI B1.20.1.

2. Fittings

a. Fittings for use with brass pipe shall be bronze or brass, 250 psi, screwed in accordance with ASTM B62 and ANSI B16.15.

PART 3 EXECUTION

3.01 INSTALLATION

A. All brass piping and fittings shall be installed as shown on the drawings and in accordance with Section 15060. Brass piping and fittings in buried service shall be wrapped with 20 mills of PVC tape. Wrapping shall be performed after all testing.

3.02 CLEANING

A. Piping shall be cleaned in accordance with Section 15060.

3.03 TESTING

A. Field hydrostatic or pneumatic testing shall be in accordance with Section 15060.

END OF SECTION

addendum number: modifying: specifications no....

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