document no rev. positive material identification plus … · 2016-07-07 · document no rev....

Document No Rev. POSITIVE MATERIAL IDENTIFICATION

(PMI)

PLUS-PMI-01 A1

Pag. 1 of 9

Issued by: P. Maggioni Approved by:.

By signature and date on the front sheet of this Procedure by the relevant persons, the signature on each page of this Procedure are waived

REVISIONS

Rev. Date Description

A1 2016/04/01 First issue


(PMI)

PLUS-PMI-01 A1

Pag. 2 of 9

Index

1. PURPOSE ................................................................................................................................................................................... 3

2. SCOPE ........................................................................................................................................................................................ 3

3. DEFINITIONS ............................................................................................................................................................................ 3

4. REFERENCE DOCUMENTS .................................................................................................................................................... 3

5. EQUIPMENT .............................................................................................................................................................................. 4

6. TRAINING .................................................................................................................................................................................. 4

7. CALIBRATION (SPECTROTEST and NITON Instruments) ....................................................................................................... 4

8. CHECKING BEFORE USE (SPECTROTEST and NITON Instruments) ..................................................................................... 5

9. TEST EXTENT ............................................................................................................................................................................. 5

10. IDENTIFICATION AND MARKING ........................................................................................................................................ 5

11. OPERATING MODALITIES ........................................................................................................................................................ 5

12. MATERIAL VERIFICATION CRITERIA .............................................................................................................................................. 5

13. REPORTING ............................................................................................................................................................................... 6

Appendix “A” ..................................................................................................................................................................................... 7


(PMI)

PLUS-PMI-01 A1

Pag. 3 of 9

1. PURPOSE

To define the scope and method of carrying out positive materials identification (PMI). This form of testing is an effective way of determining the material types in terms of chemical composition of metallic materials.

2. SCOPE

This procedure is a standard procedure that describes the methods for carrying out PMI on metallic alloy materials, components and welds during manufacture and in service. All material / part types which receive PMI will be clearly detailed on the PMI report.

3. DEFINITIONS

PMI (Positive Material Identification)

Physical testing of materials to determine the chemical composition and positively verify material composition by determining the alloy content of a component or a weld without the need to remove samples for analysis. XRF (X-ray Fluorescence Spectroscopy)

A method of PMI using a portable X-ray fluorescence analyser to verify the chemical elements that establish the positive identification for a particular material. When activated on a test item, an XRF analyser produces short wavelength electromagnetic rays. These emitted rays interact with (excite) certain elements. As a result, the excited elements then re-emit a new wavelength within a discrete energy band that is identifiable by the analyser. When used along with material standards, the portable analyser can determine approximate chemical quantities for the target elements. OES (Optical Emission Spectroscopy) Spectrography is based on optical emission. The equipment consists of a probe which releases a spark that is used to vaporise the material being analysed. The atoms and ions in this vapour produce a spectrum which can be optically measured and then recalculated to determine the components of the material.

Mill test certificate: Is a traceable document that permits each component to be identified according to the original heat or material from which it was produced.

Record of PMI results: Is a document defined by Owner’s procedures with the results of PMI identification.

4. REFERENCE DOCUMENT

ISO 6955: Analytical Spectroscopy Methods-Vocabulary; ASTM E135: Standard Terminology Relating to Analytical Chemistry for Metals, Ores, and Relate

Materials; ASTM E322: Standard Test Method for X-Ray Emission Spectrometric Analysis of Low-Alloy Steels and

Cast Irons; ASTM E572: Standard Test Method for Analysis of Stainless and Alloy Steels by X-ray Fluorescence

Spectrometry; ASME II Part A (Ferrous Material Specification) ASME II Part C (Specification for Welding Rods, Electrodes and Filler Metals) Niton XL-2 GOLD Alloy Analyzer Operating Manual; Spectrotest TXC02 Alloy Analyzer Operating Manual API RP578 Material Verification Program for New and Existing Alloy Piping Systems;


(PMI)

PLUS-PMI-01 A1

Pag. 4 of 9

All these reference document are applied in their last valid edition and/or revision.

5. EQUIPMENT

1) Portable Optical Emission Analyzer SPECTROTEST type TXC02 The SPECTROTEST is even able to identify low alloy steel with the carbon content during the rapid arc excitation mode. The instrumentation is especially developed for handling the operation on site. By using cutting edges technology the instrument is not sensitive to vibration, temperature changes and dust. User friendly software makes the operation of the instrument easy to learn. The Approximate Analysis with Argon (spark excitation) takes less then 20 seconds. With Air (arc excitation) analysis takes less than 3 second

By using the Argon flushed pistol head and proper sample preparation results similar to laboratory analysis can be reached. With the mix up control (sorting) mode of operation the instrument will be controlled by a “YES/NO” command. If the contents of a material meets the contents of a reference sample, a “YES” or pass will be indicated. If the contents of a material does not meet the contents of the reference sample, a “NO” or fail will be indicated.

2) Niton XL-2 GOLDD Analyzer is a single unit, hand held, high performance portable X-Ray fluorescence (XRF) elemental analyzer.

6. TRAINING

Personnel applying this procedure shall be familiar with this procedure and only trained personnel are permitted to operate the Niton XL-2 GOLDD Alloy Analyser and SPECTROTEST.

PMI operators have to be suitably trained and must have used PMI equipment on a regular basis during previous 6 months.

Personnel of NDT PLUS have attended a manufacturers training course in the use of the PMI equipment. Certification of training is available on request.

PMI operators are responsible for the instrument use and for the instrument measures.

Training and continous working of PMI operators have to be recorded.

7. CALIBRATION (SPECTROTEST and NITON Instruments)

The accuracy of analysis can be influenced by different factors, like altering of individual components of the instrument or dirt on the pistol. To guarantee an optimal Approximate Analysis, the Spectrotest has to be recalibrated on a regular basis (recommended once each six months). This means, that the calibration of the instrument will be adjusted to the new intensities. A series of recalibration samples is needed to perform such a recalibration. Reference samples (to recalibrate the instrument when necessary): F5 321 316 ST 6B HAST X CDA 360 Al 2024 D2 Duplex 2205


(PMI)

PLUS-PMI-01 A1

Pag. 5 of 9

Niton Analyzers do not require calibration. Both of it may also be checked on a regular basis (for example, once each six months), using a series of known standards, provided with original Certificates of Analysis. For complete list, see Appendix A.

8. CHECKING BEFORE USE (SPECTROTEST and NITON Instruments)

At the beginning and at the end of each testing, both instruments SPECTROTES and Niton Analyzers have to be checked, using a known standard for each alloy type to be inspected. For complete Bureau Analysis Samples list, see Appendix A

9. TEST EXTENT

Extent of verification shall be the one from the client’s specifications. The elements of the basic alloy materials to be verified shall be in accordance with the client’s

specifications (*). PMI may be required for one electrode or wire sample for each lot of filler metal before welding PMI testing of weld metal (deposited or undiluted weld buttons) is an acceptable alternative to PMI

testing of an electrode or wire sample. This is applicable, also, when weld rods have the alloying elements contained in the flux, and do not meet the alloy specification until welded.

In cases where PMI testing of the completed weld is not possible because of geometry (small fillet weld and narrow root welds), PMI testing of filler metal lots is an acceptable substitute for testing of the completed weld.

10. IDENTIFICATION AND MARKING

All components and welds that are found unacceptable shall be marked immediately with a circled red “X” pending resolution.

11. OPERATING MODALITIES

According to Spectrotest “Operation Manual”: Spectrometric analysis needs proper sample preparation. The type of preparation depends on the material of the sample. For sample preparation on field, a belt grinder, one grinder, one hand disk grinder or scrub disk is usually enough. The procedure for sample preparation will be reviewed during operations on field.

According to Niton, X-Ray fluorescent elemental Analyzers “Operation Manual”: When the test surface is representative of sample, surface preparation is not required. If sample preparation is required, a belt grinder, one grinder, one hand disk grinder or scrub disk is usually enough.

Acceptance criteria of obtained results are established according to Owner’s procedure.

12. MATERIAL VERIFICATION CRITERIA

The test sample shall match the specified grade of material. The components having dimensions welds less than 1 inch, they will be evaluated using a suitable

sample size made with the same procedure. When weld metal is tested the results shall match the consumables manufacturers deposited weld

metal specification. When welding consumables are tested the results shall match the manufacturers specification data

sheet. Acceptance criteria of obtained results are established according to Ownner’s procedure. If Ownner’s procedure are not available the results will be evaluated according to the standards ASME II

pat A and ASME II part C.

Note: (*) The technique used (X-RAYS fluorescence with a portable instrument) cannot detect elements lighter than Sulfur. Therefore carbon cannot be detected.


(PMI)

PLUS-PMI-01 A1

Pag. 6 of 9

13. REPORTING

All analysis checks shall be the subject of a typed test report, which shall be issued on completion of the examination. If another reporting format is required, it shall be specified by the client or contract. In such instances, the client shall supply the relevant report sheets and copies of all completed reports will be retained on file. The test report sheet shall generally contain, as a minimum, the following information:

Client Client Reference No Part Identification Date of Test Report No Procedure No, and Revision Equipment used Material type Operator name and Signature.

Where required, or advised by the client, notes referring to any inaccuracies will be made in the Comment box at the end of the report.


(PMI)

PLUS-PMI-01 A1

Pag. 7 of 9

Appendix “A”

List of standards used to check instruments, for ferrous material

Material Sample Certification body Note CARBON STEEL AISI 4140 IARM 30F ARMI 42CrMo4

CARBON STEEL IRSID1759 IRSID 41CrAIMo7 (1% Al)

CARBON STEEL N°456 BAS C-B-Nb-Sb...





STAINLESS STEEL NSA3 MBH N

STAINLESS STEEL BS 86E BSC RA 330

STAINLESS STEEL 17005 MBH Austenitic

STAINLESS STEEL BS 93E BSC Grade 440C

STAINLESS STEEL BS 81P BSC Grade 304L

STAINLESS STEEL BS 84J BSC Grade 316L

STAINLESS STEEL 13M BS 185 MBH 15-5 PH

STAINLESS STEEL 13X NSC2 MBH Type AISI 200

STAINLESS STEEL 14211 MBH With W

STAINLESS STEEL 342 BCS Ferritic

Material Sample Certification body Note

Acciai N°215 BCS High C-1% Acciai N°401 BCS Low alloy steels Acciai N°402 BCS Low alloy steels Acciai N°404 BCS Low alloy steels Acciai N°405 BCS Low alloy steels Acciai N°406-2 BCS Low alloy steels Acciai N°407 BCS Low alloy steels Acciai N°408 BCS Low alloy steels Acciai N°409 BCS Low alloy steels Acciai N°410 BCS Low alloy steels Acciai N°432 BCS C,Nb Acciai N°433 BCS C,Nb Acciai N°434 BCS C,Nb Acciai N°435 BCS C,Nb Acciai BS 18A BSC 11% Mn Acciai BS 71A MBH Aisi Gr41L45-Pb Acciai BS 74 E MBH Pb,Te Acciai 12M BS 67B MBH Low Alloy Acciai 14M BS34D (H13) MBH - Cr-Mo-V Acciai BS H12 BSC -5%Cr-Mo- W Acciai 14M BS37D (Aisi D2) MBH -C 1,5% Cri 1 %-Mo-V Acciai 14M 30B MBH -4%Cr- 17%W-V Acciai T2/2 MBH -4%Si-Ti Acciai N°483 BCS -2,9%Cr- 9%W-2%Co Acciai N°484 BCS -5%Cr- 10%Co-20%W Acciai N°486 BCS -4,5%Cr- 5,8%W-1,8V-

5,2Mo Acciai N°487 BCS -3,9%Cr- 8%Co-1,8%W-9,4Mo Acciai B6 BAS Low Alloy Cr l %- Ni1,5%


(PMI)

PLUS-PMI-01 A1

Pag. 8 of 9

List of standards used to check instruments, for non ferrous material.

Sample Certification body Description CDA937 ARM 80Cu-10Sn-10Pb 31X7835.1 MBH CuZn39Pb3 06-1410 LPB Cu-10Sn-2Pb 07-3342 LPB CuBe2 08-4256 LPB Cu-10Ni-1Si B20738 LPB Bronzo Al Ni Fe 32X CA12 MBH Bronzo Al


(PMI)

PLUS-PMI-01 A1

Pag. 9 of 9

document no rev. positive material identification plus … · 2016-07-07 · document no rev....

Documents