Products & Services

T . D . W I L L I A M S O N , I N C .

Piping Solutions

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Pipeline Pigs

1TDW Pigging Products®

Tough Urethane

TDW offers pigs that clean, de-water,separate batches, and serve a host of other purposes. New materials, new con-figurations, and new approaches to piggingare regularly developed as TDW continuesto re-invent the pigging industry.

The OptionAll™ Pig does just that—offers you options. Its standard com-ponents can be assembled to make a multitude of configurations in sizes 4"through 14" (100 -350 mm). Made ofTDW's durable Formula BTTB™ Urethane, it can be used to batch, clean, de-water,run in dual-diameter lines, or run in bi-directional lines.

VANTAGE ® V — Available for 16" (400mm) and larger lines, this pig consists ofone basic body and cup or disc design forbatching and displacing. Brushes or bladescan be added for cleaning. Two-, three-, or four-cup configurations can be added.

VANTAGE ® + Pigs are multi-purposepigs. The basic unit with three cups servesas a batching and displacement pig. It'savailable in sizes 2" through 14" (50 -350mm). The 2” through 8” (20-200 mm),may be equipped with two cups and wirebrushes. The 10" through 14" (50 -350mm) may be equipped with steel wirebrushes or urethane blade cleaning elements.

WCK – The WCK Cleaning Pig has dual-diameter capability that permits cleaning ofmultiple sizes of pipe in one run. Standardcleaning versions are available in 6 "through 14" (150 -350 mm), and dual-diameter versions are available in sizes 6" x 8" (150 x 200 mm) through 14” x 16"(350 x 400 mm).

BiDirectionAll Pig is designed to beused in pipeline construction during hydro-static testing for displacement applications.This pig is bidirectional and designed toallow the user to hydrotest and displacewater without having to remove the pig. Itcan be easily converted to a cleaning pig.

Tough Urethane

FJR & JRN Cleaning Pigs combine the ability to traverse sharp bends withmaximum cleaning capabilities and long service. In sizes 2" through 6" (50-150mm), they come equipped with wire brushes and urethane cups.

Gauging Pigs are made for detectingobstructions in new pipelines to assurepassage of cleaning pigs. They areequipped with durable urethane cups and gauging flanges. The SG-2 is availablein sizes 6" through 14" (150-350 mm). The LG-2 is available in sizes 16" through36" (400-900 mm). Aluminum gaugingflanges are optional.

TDW's PitBoss™ Cleaning Pig is designed to remove deposits from pits to allow corrosion inhibitors and bio-cides to deter corrosion in the pipeline.PitBoss is available in sizes 4" (100 mm)and larger and in dual-diameter configurations.

The ULTRA™ Pig 16" through 36" (400-900 mm) is unsurpassed for efficient,economical, product batching or line displacement. It has all-urethane construc-tion (except bolts, nuts, and washers).

UNISPHERE™ Pigs are seamless, liquid-cast, polyurethane balls used forheavy-duty service in the removal of liquidhydrocarbons and water from pipelines and piping systems. "Spheres" are filledwith liquid, usually glycol or lightweight oil, and are available in sizes 4" through56" (100 -1400 mm).

REDSKIN™ Urethane Foam Pigs 2"through 24" (50-600 mm) are tough, abrasion-resistant, polyurethane foam. Awire brush model is available with patentedvariable bypass. The WHITESKIN™

Urethane Foam Pigs 2" through 42" (50 -1050 mm) are designed for air removalprior to hydrostatic testing, dewatering,and drying after hydrostatic testing.

TDW Pigging Products

PIG-SIG IVand PiggingSystems

The PIG-SIG® IV Scraper Passage Indicator notifies the operator that a pig has passed a designated location. It sur-passes all previous models due to its simplicity and modular concept. This field-rugged and reliable indicator is available in four configurations:

visual flag indicator, manual reset visual rotary cap, manual reset electrical signal, automatic reset combination electrical signal, automatic reset and visual flag, manual reset

As the pioneering leader in pigging technology and number onesupplier of pigs, TDW designs, engineers, and fabricates completepigging systems. They consist of launchers, receivers, closures,handling equipment, skids, PIG-SIG pig passage indicators, spherelaunch pins, valves, and piping. Standard or custom-designed systems can be provided.

Launchers and Receivers are designed to insert and remove pigs in an operating pipeline. Launchers and receivers are fabri-cated slightly larger than the pipeline and are installed adjacent to the pipeline, connected through valving systems. They areequipped with: PIG-SIG pig passage indicators to identify when the pig has left or entered the trap; a bypass or kick-out valve that controls pipeline flow through the trap; vent and drain outlets; and a closure door for pig insertion and removal.

Launchers and receivers can be a simple piping arrangement, or complex enough to include automatic valving features, timedreleases of pigs or spheres, and/or handling of multiple pig sizes.

TDW Closures offer outstanding design features. A large, cross-sectional diameter O-ring located on the periphery of the closure hub provides positive sealing as well as protection fromdamage by tools, pigs, or debris. Every TDW closure is equippedwith a pressure-warning lock to indicate internal pressure beforethe door is opened.

The threaded closure, sizes 4" through 14" (100-350 mm), threads to a hub that is welded to the end of the trap. Handles are installed to make closure turning easy. A hinge arm, connecting the door with the hub, is standard on 10" through 14" (250-350mm) threaded closures to facilitate handling.

TDW provides clamp-ring, quick-opening closures in sizes 4"through 60" (100-1500 mm). This closure employs a hinged door,which is secured to the hub with clamp rings.

All Systems GoAll Systems Go

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3TDW Pipeline Surveys

®

TDW Pipeline Surveys offers a complete line of on-stream, in-line, inspection services. Included are pre-inspection cleaning,geometry surveys, and bend radius measurement surveys.

The TDW mechanical KALIPER ® Surveyor was originallydeveloped in 1970 and has proven to be a very reliable inspectiontool with more than 150,000 miles (240,000 km) of pipelineinspections.

Operators of transmission pipelines need internal pipelineinspection tools that will report the magnitude and location ofreductions that result from dents, buckles, out-of-roundness,gouges and flat spots.

In on-stream pipelines and new construction, operators need this information faster than mechanical surveys can provide. The Electronic KALIPER® Surveyor, developed by T.D. Williamson, Inc., in 1985, can provide these results on siteat run completion.

Our exclusive software programs and operating procedures arethe key to an internal inspection instrument that can: distinguishbetween bends and pipe reduction; distinguish between sharpreductions and out-of-roundness; locate and evaluate known orsuspected damage; and provide on-site analysis for rapid faultlocations. The Electronic KALIPER Surveyor offers the best inproven successful internal pipeline geometry measurement.

A survey using the RMT™ Surveyor (Radius MeasurementTool) takes the guesswork out of pipeline bend measurement.Results categorize pipeline bends, specifying bend radius andangle. The RMT is designed to accurately define them as well,without interpretation or costly calibration digs.

The RMT Surveyor is durable, microprocessor controlled, hassolid-state memory, will traverse all 1-1/2D bends, and provides"on-the-spot" preliminary data analysis.

Pipeline SurveysInternal ConditionsInternal Conditions

TDW Services

Temporary Bypass

TDW Services

Stay In the FlowStay In the Flow

Typical ApplicationsTransmission PipelineDistribution SystemsIndustrial Plants and Process PipingRefineries and PetrochemicalWater and Waste Water SystemsNuclear Power PlantsOffshore Platforms and Subsea Applications

HOT TAPPING AND LINE STOPPINGHOT TAPPING AND LINE STOPPING

STOPPLE® Plugging Machine

Typical STOPPLE® Plugging Installation

TDW Services, the service division of T.D. Williamson, S.A.,provides hot tapping and temporary pipeline plugging equipmentand personnel for maintenance solutions to the piping andpipeline industries. These are offered on a “per job” basis orthrough maintenance contracts to companies choosing to out-source these services. TDW has service centers strategicallylocated around the world. Service technicians and specializedequipment are available for planned or emergency operations.

TDW Services' equipment includes a full line of drilling andtapping machines, plugging machines, fittings, and accessoryequipment. For unique applications, TDW Services provides engineering and technical support to design and fabricate specialized equipment and procedures.

TDW Services offers pipeline hot tapping for branch connections to pipe systems, tanks, and pressure vessels. TDW also provides STOPPLE® plugging services to isolate sections of pipe systems to permitrepair, alterations, replacements or additions without shutdown. Services can be in subsea envi-ronments as well as on land.

Pipe systems that can be serviced include steel, PE, cast iron, ductile iron, concrete, and asbestos cement. Hot taps range from1/4" to 66" outlet size (6-1,675 mm) in pressures to 2,200 psi(150 bar) and temperatures to 700°F (370°C). Pluggers are avail-able in sizes 1/4" through 96" (6-2,440 mm) in pressures to 2,200 psi (150 bar) and temperatures to 650°F (340°C).

5T.D. Williamson, S.A.

Hot Tapping & PluggingLine InterventionLine Intervention

Hot tapping is a method for accessingthe inside of an operating pipeline, usingeither a drill or a circular cutter. It is donefor any number of reasons, includingattachment of a branch connection to the line, installation of an internal probe ormonitor, or to stop flow in a line for maintenance and repair purposes.

TDW manufactures a range of drillingand tapping machines that will cut 1/2"through 60" (13-1500 mm) holes in pipe-lines and piping. Standard machines have a maximum operating pressure of 1,480psi at 100°F. All meet NACE MR0175-97.

The T-101 Drilling Machine is used for making 1/2" through 4" (12.7 -100 mm)taps in pipelines, piping, and tanks. It canbe operated either manually or with an airmotor. The standard model has an 18"extension of the drill/cutter. The T-101 XLmodel is available in 1/2" through 6" (12.7-150 mm) with a drill/cutter extension of28". Twist drills are used up to 1-7/16" (37 mm) and hole saws or cutters are used from 2" through 6" (50-150 mm).

The 904 Drilling Machine is a higherpressure (balanced) version of the T-101XLmachine. It is rated at 2,220 psi (150 bar).At this higher pressure, it is limited to a maximum of 4" (100 mm) taps. (For special requirements, such as higher pres-sure or temperature, consult the factory.)

The 360 Tapping Machine makes pipetaps 2" through 6" (50 -150 mm) and tank taps through 4" (100 mm). Pipe sizefour times the cutter diameter should beconsidered a tank tap. This machine can be operated either by hand or with an airmotor. The tapping machine has a boringbar travel of 24" (600 mm). Maximumoperating pressure is 1,480 psi at 100°F(100 bar at 38°C).

The 660 Tapping Machine can be either air or hydraulically operated and is used for making pipe taps from 3" to 12" (80-300 mm). The 760 Tapping Machine ishydraulically operated and is used for making pipe taps from 3" to 16" (80-400mm). The 860 Tapping Machine is alsohydraulically operated and is used for making pipe taps from 3" to 20" (80- 500mm). All models feature a split frame forlower maintenance costs and ease of packing replacement.

The 1200 Tapping Machine, which uses hydraulic power, is used to make 12" through 36" (300-900 mm) taps. It isavailable with the standard 72" (1830 mm)boring bar travel, or the 1200 XL modelcomes with 108" (2740 mm) travel. It has a dedicated, diesel-driven, hydraulicpower unit, which can also be used withSTOPPLE® Plugging Machines andhydraulic SANDWICH® Valves.

The 936 Tapping Machine is a higherpressure (balanced) version of the 1200XL.It will work in pressures up to 2,220 psi(ANSI Class 900) in sizes 12" through 36" (300-900 mm). It is available with the standard 108" (2740 mm) boring bar travel.

The 2400 Tapping Machine can make hot taps from 30 " through 60" (760-1500 mm) at pressures to 1200 psi(82 bar). It is hydraulically powered with an electronic remote-control system.

®

T.D. Williamson, S.A.

STOPPLE® Plugging Systems serve astemporary block valves to isolate a sectionof line for relocation, repairs, or additionswithout interrupting service. A bypass canbe installed, keeping the line in service and product flow moving to the customer.The line can be elevated, under ground, or under water.

The machine consists of three major sections: a hydraulic cylinder or jack-screw, a plugging head housing, and aplugging head. Hydraulic cylinders areavailable to operate 6" through 48" (150-1,200 mm) plugging heads. Jackscrew versions are available to operate in sizes 4" through 6" (100-150 mm) pluggingheads. Maximum operating pressure is1,480 psi (100 bar). Maximum operatingtemperature is 180°F (82°C).

The SANDWICH® Valve is dsignedspecifically for use with TDW's STOPPLEPlugging Machines. Its unique constructionprovides a minimum face-to-face dimen-sion, minimizing cutter, and plugging headtravel. It is intended for removal and reusewhen the operation is complete. Availablein sizes 4" through 48" (100-1,200 mm),the valve flanges are designed to meetANSI/ASME 150, 300, 600, or 900 classstandards. The 4" through 22" (100-500mm) valves are manually operated. The 24"through 48" (60-1200 mm) are equippedwith a hydraulic actuator.

Unique features of SANDWICH Valvesinclude: bi-directional attachment; over-sized bore; internal bypasses for pressureequalization; positive shutoff; and drainconnections in end flanges.

To accommodate a SANDWICH Valve,tapping fittings are either bolted on orwelded to the line. A tapping/drillingmachine is attached to the fitting through a valve and the tap is made.

STOPPLE® Plugging Fittings, 4" through48" (100-1,200 mm), are also full branch fittings. They are equipped with LOCK-O-RING® Flanges, which are drilled, faced,and pressure rated to match ANSI/ASMEClass 150, 300, 600, or 900 (SI PN 20, 50,100, or 150) RTJ or RF facing finish.

LOCK-O-RING® Flanges and Plugspermit recovering the tapping valves after a STOPPLE Plugging operation. They canbe used in new construction to permitfuture expansion of a pipeline or piping system. Providing a pressure-tight sealover the tapped hole, LOCK-O-RING Fittings can elminate the need for valvesuntil the line needs to be plugged. LOCK-O-RING Flanges are drilled, faced, and pressure-rated to match ANSI/ASMEClass 150, 300, 600, or 900 (SI PN 20, 50, 100, or 150) RTJ or RF facing finish.

THREAD-O-RING™ Fittings, 2" through 3" (50 -80 mm) sizes, are used during TDWSTOPPLE plugging operations as purgeand equalization fittings. They can also beinstalled during new construction and usedfor blowdown connections at high pointsduring line-fill operations or for insertionof corrosion probes.

STOPPLE® Fittings with side out-lets are used with plugging machines to temporarily plug a line without shutdown.They are equipped with LOCK-O-RINGflanges, which are drilled, faced, and pressure rated to match ANSI/ASME Class 150, 300, 600, or 900 (SI PN 20, 50,100, or 150) RTJ or RF facing finishes.

Tapping Fittings are full-branch or reducing-branch split tees designed for use when installing branch lines. They are equipped with ANSI/ASME Class 150, 300, 600, or 900 (SI PN 20,50, 100, or 150) RTJ or RF flanges.

7T.D. Williamson, S.A.

Distribution SystemsLine InterventionLine Intervention

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TDW Plugging Systems are a versatileand simple means of stopping off pipelinesand gas mains while maintenance or repairwork is done. SHORTSTOPP® PluggingMachines are easy to operate, and many of the fittings, adapters, and housings used with them are interchangeable.

The SHORTSTOPP® 60 Plugging System is designed for pressures up to 60 psi (4 bar) and can be used on 1-1/4”through 12” (30-300 mm) pipe.

The SHORTSTOPP® 500 PluggingSystem can be used on 1-1/2" through 12"(30-300 mm) pipe . It will plug 1-1/2" (38mm) at 275 psi (19 bar) and 2" through12" (50-300 mm) lines at 500 psi (35 bar).As a completion machine, the SHORT-STOPP 500 has a full-range capability, set-ting 1-1/2" through 12" completion plugs.

The SHORTSTOPP® II Plugging Systemis rated at 150 psi (10 bar) and can beused on 1-1/4 " through 12" (30-300 mm)pipe. It can plug plastic as well as steel fittings. SHORTSTOPP is available for size-on-size or folding head plugging. The folding head uses a smaller fitting,therefore reducing cost.

The PSO (Positive Shut-Off) PluggingSystem is an answer to increased gassecurity concerns. Using an expandableseal, the PSO can plug distribution lines to 75 psi (5 bar) and is designed to provide a 100% seal. The PSO is availablein 2” to 12” (50-300 mm) sizes.

The T-203 Tapping Machine is used formaking 4" through 12" (100-300 mm) taps.The machine is used primarily with theSHORTSTOPP ® Plugging System. The T-203 Tapping Machine is rated at 740 psi(50 bar) at 100°F (38°C). It will operate to a maximum of 180°F (82°C) at 675 psi(46 bar).

The BACKSTOPP™ System is designed for emergency repair of pipeline leaks thatare the result of external damage, withoutplacing personnel in the excavation.

The POLYSTOPP® Plugging Systempermits maintenance or repair to poly-ethylene pipe without interrupting flow.Maximum working pressure is 7 bar withexceptions in size 200 mm OD. It accom-modates sizes 90-250 mm. STEELSTOPP™II is a tapping and plugging system for 90-250 mm steel pipe.

The SHORTCUTT® Valve is a full-opening temporary valve designed foruse with a TDW T-101 Drilling Machine, T-203 Tapping Machine, and SHORTSTOPPPlugging Machine. SHORTCUTT Valves,sizes 4" through 12" (100-300 mm), havemaximum operating pressures of 245 psi at180°F (17 bar at 82°C) and 275 psi at100°F (19 bar at 38°C). The SHORTCUTT500 Valve is available in 2" and 3" (50 mmand 76 mm), is 500 psi (35 bar) rated, andis compatible with the SHORTSTOPP 500equipment.

The PS2000 XL® PE Drilling Machineis a manually operated drilling machine used to cut holes in 100-200 mm poly-ethylene pipe.

The P2000 Plugging System Machineis a manually operated drilling and plug-ging system used to tap and plug 90-250mm polyethylene piping. The system usesPiedfort-designed electrofusion fittings.

The P100 is designed for hot tapping of 40-100 mm steel pipe through pluggingfittings and tees in pressures up to 25 bar.One machine acts as both the tapping andplugging machine.

The M80/C90 tapping and plug-ging system is designed for tapping andplugging medium pressure (6 bar) gas and water distribution lines. It is manu-factured in Piedfort.

The MAB System is designed to stop flow in a gas distribution line byinserting gas bags into the line through a tapped hole, then inflating it until the bag seals against the pipe wall, stoppingflow. It is designed for use in 80-400 mmat a maximum of 50 mbar.

The SHORTSTOPP® Welding Fittings are designed to provide a means of plugging off pipe with SHORTSTOPPequipment. The threaded fittings for 1-1/4" through 3" (33-80mm) mains consist of a pipe cap, completion plug, and steel nipple. The fitting welds only to the top of the pipe, whichrequires less welding and a smaller bell hole. The larger sizeSHORTSTOPP® Welding Fitting for 4" through 12" (100-300 mm) lines features a reusable bolt-on adapter flange. Maximum working pressure is 285 psi (20 bar) at 100°F (38°C), and 245 psi (17 bar) at 180°F (82°C) .

The 3-WAY™ Tee Fitting is used with SHORTSTOPP®

equipment to relocate mains, tie-in equipment, connect laterals, extend lines, and make crossovers without shutdown or temporary bypass. Sizes are available for 1-1/4" through 12"(30- 300 mm) and are rated the same as the welding fittings.

The SPHERICAL 3-WAY™ Tee Fittings are full-encircle-ment, low-profile fittings with an outlet that can be positioned on the side or bottom. Sizes 2" and 3" (50 and 76 mm) have athreaded completion plug and cap. Sizes 4" through 12" (100-300 mm) have a completion plug and a blind flange. Bothfittings meet ANSI/ASME Class 150 (SI PN 20) service ratings.

M-STOPP™ Fitting is low-profile, full-encirclement fittingdesigned to provide a means of plugging off pipe with other manufacturers’ equipment. The fitting is available in sizes 3 "through 12" (80-300 mm) and can be provided to ANSI/ASMEClass 150, 300, or 400 at 100°F. The M-STOPP Fitting outlet can be positioned to the side or bottom of the pipeline for branch connections.

SHORTSTOPP® 300D Fittings, 4" (100 mm) and larger, are full-encirclement fittings with flanges drilled, faced, and pressure-rated to ANSI/ASME Class 300 (SI PN 50) standards.Fittings, 2" and 3" (50 and 80 mm), have threaded necks and a cap is installed. They are available in split tee, 3-WAY Teeor spherical 3-WAY Tee configurations.

The Mechanical SHORTSLEEVE™ is a full-encirclement split sleeve requiring no welding. The 2" (50 mm) size has a maximum operating pressure of 175 psi at 150°F (12 barat 63°C) and a maximum operating temperature of 180°F at 165 psi (82°C at 11 bar). The 4" through 12" (100-300 mm) sleeves are designed for use on cast iron pipe. Maximum operating pressure is 175 psi (12 bar) at 150°F (6°C). The maximum operating temperature is 180°F at 165 psi (82°Cat 11 bar).

POLYSTOPP® Fittings provide a means for tapping and plugging live polyethylene lines for the installation of branch connections as well as for repair. Available in sizes 90,110 125, 160, 180, 200, 225 and 250mm.

T.D. Williamson, S.A.

9

GasLeakDetection

Gazomat

No Need GoesUndetected

GAZOMAT™, a member of the TDWgroup of companies, has a complete product line for the surveillance and management, detection, and localization of leaks in gas distribution networks.

The leak detection units, VSR, VLS andDIGITEC 2000, are designed to be mobileand maneuverable. They provide maximumaccuracy and safety due to the shortresponse time and sensitivity of the detection cell. Accurate and user-friendlyresults are available for analysis and interpretation by the supervising engineer.Survey data are recorded and managed in a computer-aided monitoring system.

The work team of the high speed gasleak detection vehicle, VSR, is comprisedof the driver and one operator. The vehiclefollows the gas pipeline at an averagespeed of 20 km/h. The air/gas sample isconsecutively conveyed through a watertrap, filter, and oxidizer furnace prior toanalyzing the sample in a flame ionizationdetector.

VSR : Véhicule Surveillance Réseau

VLS, the small gas leak detection vehicle, is equipped with a flame ionization detector(similar to the VSR), or a semiconductordetector for manufactured gas. The in-struments analyze the environment sampling. A portable terminal registers the results while information is transferred into a microprocessor back at the office. The software runs under a Windows environment for easy analysis, and the files are transferred in ASCII format. Thecomplete system can be installed on different vehicles.

VLS : Véhicule Léger de Surveillance

DIGITEC 2000 is based on the same gas detection technology as the VSR. The system is monitored by a Windows®

environment, which provides an entirelycomputer-aided monitoring of gas pipelinesurveying. Survey data are continuouslysaved to a hard disk and can be copied to diskette for processing and analyzingpurposes. Recordings can be edited on acolor printer, which is part of the package.The compact equipment is easily adaptableto other types of vehicles.

IONIFLAM and DF6 are portable units for detection of leak areas. These productsoffer the user either flame-ionization orsemi-conductor technology. Both are lightweight and responsive to extreme concentrations.

IONIFLAM is a detection method entirelycompatible with the VSR vehicle for high-speed gas leak detection and a continuouspipeline survey. The equipment can also beused for pipeline survey while the operatoris walking.

DF6 is an instrument for systematic gas leak detection based on the Catex+technology with the advantages of digital processing and management.

DF6 : Détection Fuites 6

For pinpointing the exact location of the leak and thus limiting the size and costof the intervention, Gazomat developed theCATEX+ and its supporting equipment—a calibration bench and a drilling trolley. The portable Catex+ detection unit com-bines catalytic combustion and thermalconductivity technologies in a micro-processor-based unit. It is fully certifiedand complies with the required Europeansafety standards. Catex+ is complementedby a multi-purpose calibration bench, capable of calibrating multiple detectionunits in various operating languages.

®

No Need GoesUndetected

T.D. Williamson, Inc.

Also AvailableWhen You Need ItWhen You Need It

TDW Technical Training Classes are concise, hands-on courses in the operation and maintenance of TDW hot tapping and plugging equipment. Training curriculums include low and intermediate pressure, high pressure,and maintenance. On-site training schools are available worldwide.

Technical Training Classes are designed to meet specific objectives in five areas: 11)) To promote the safe and efficient use of the equipment during operation; 22)) To increase installation efficiency; 33)) To promote regular maintenance of the equipment; 44)) To increase disassembly and assembly efficiency whenrepairing equipment; and 55)) To troubleshoot problems with increased efficiency.

TDW Equipment Repair and TDW Cutter Repair & Exchange Service ensures that your TDW equipment is available and operating efficiently. The repair center will expedite your repairs, and cutters can be made "job ready" through the cutter exchange program.

The M-2 Plastic THINSULATOR® Spaceris a high-density, injection molded, poly-ethylene product. This material strengthpermits the THINSULATOR Spacer to be compact, allowing more clearancebetween pipe and casing. It slides easilyinside the casing and is abrasion resistant.

The U-SEAL™ allows maximum flexibilityfor carrier pipe movement and concentricinstallations. The seal is held firmly in place by stainless steel bands and clamps.It comes in sizes 2" (50 mm) and larger.

The ZZ--SSEEAALL™™ is a thick, heavy-duty casing seal for installations where an extra rugged seal is desired. Stainless steel bands hold the seal firmly in place. Z-SEAL casing seals come in sizes 2" (50 mm) and larger.

CCeenntteerriinngg CCrraaddlleess are used to center the pipe in the end of the casing, and theyinsulate the pipe from the casing.

The CCoonncceennttrriicc SSuuppppoorrtt™™ IInnssuullaattoorr hasnonconductive runners and key block forhigh-compression strength. High-tensilecable is plastic coated for added insulation protection. Ample clearance is allowed by smaller runners to permit free move-ment into the casing. It is available in sizes 2" (50 mm) and larger.

The WEDGE-LOCK® Pipe Plug providesa temporary means for plugging off pipeends or tapped vessel openings to allow foroperations such as pressure testing vesselsor sections of pipe, pigging operations, andclosure installations. The WEDGE-LOCKPlug eliminates vapor hazards and is avail-able in sizes 2" through 14" (50-350 mm).Special clamps are available to support thepipe in higher pressure applications.

TDW offers a full line of equipment tojoin and service polyethylene (PE) pipe forgas distribution, water works, and otherindustrial applications.

CentreFuse® Machines cover all buttfusion needs, from 1/2" CTS through 18"DIPS and equivalent metric sizes. The keyfeature of the CentreFuse line is that itemploys centerline butt fusion technology,supplying symmetrical bead developmentaround the entire circumference of the twopipe ends.

Customer Services

2TDW Pigging Products®

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Visit our website: www.tdwilliamson.com

Pub: 00-181-0500

TDW Corporate Offices8506 East 61st StreetTulsa, Oklahoma 74133-1919Tél: (918) 447-5001Fax: (918) 447-5050

TDW Tulsa Manufacturing Plant6801 South 65th West Avenue Tulsa, Oklahoma 74131-2444

Tél: (918) 447-5100Fax: (918) 446-6327

TDW Polyethylene Products (PEP)6801 South 65th West Avenue Tulsa, Oklahoma 74131-2444

Phone: (918) 447-5160Fax: (918) 447-5154

TDW Pigging Products10727 East 55th Place Tulsa, Oklahoma 74145

Tél: (918) 447-5400Fax: (918) 664-7091

T. D. Williamson S.A.6, rue du TravailB-1400 Nivelles BELGIUMTél: (32) 67/28.36.11Fax: (32) 67/28.36.01

T. D. Williamson (U.K.) LimitedFaraday Road, Dorcan WaySwindon, Wiltshire ENGLAND SN3 5HFTél: (44) 1-793/603600Fax: (44) 1-793/603601

TDW Pipeline Surveys2929 West 21st Street Tulsa, Oklahoma 74107

Tél: (918) 447-5500Fax: (918) 582-1423

T. D. Williamson (France) S.A.Electroma • Piedfort • Gazomat • AquamatSiége socialZ.I. 11, rue de l’Atome - BP 81F-67802 Bischheim Cedex FRANCETél: (33) 388.19.72.38Fax: (33) 388.19.72.19

T. D. Williamson (France) S.A.Electroma • Piedfort • Gazomat • AquamatService Commercial11, avenue DubonnetImmeuble Le Doublon - 7˚ étageF-92400 Courbevoie FRANCETél: (33) 1 49 05 07 20Fax: (33) 1 49 05 43 95

Williamson International Corp.9 Sungei Kadut CrescentSingapore 728687REPUBLIC OF SINGAPORETél: (65) 364-8520Fax: (65) 364-8521

TDW Services, Inc.USAPhone: (918) 447-5100Toll Free: 1-800-828-1988Fax: (918) 446-0398Canada

Phone: (905) 873-2272

ISO Certified 9001 and 9002

® Registered trademarks of T.D.Williamson, Inc. in the United States and foreign countries asapplicable. TM Registered trademarks of T.D.Williamson, Inc. in the United States and foreigncountries as applicable.

Products in this publication are patented in the United States and in foreign countries, or havepatents pending in the United States and in foreign countries.

© Copyright 1998 All Rights reserved T.D.Williamson, Inc.

BACKSTOPP is a registered trademark of NIGAS. Windows is a registered trademark of MicroSoft,Incorporated.

Central/South America

Phone: (918) 447-5100Europe/Africa/Middle East

Phone: 32-67/ 28-36-11Asia/Pacific

Phone: 65-364-8520