Download Engineering Spec for Positive Material Identification PDF

TitleEngineering Spec for Positive Material Identification
TagsPipe (Fluid Conveyance) Specification (Technical Standard) Calibration Structural Steel Verification And Validation
File Size199.8 KB
Total Pages8
Document Text Contents
Page 1

EPC HARWEEL CLUSTER PHASE 2 FACILITIES

(PDO Contract No. C31-0615)

ENGINEERING SPECIFICATION

FOR

POSITIVE MATERIAL IDENTIFICATION (PMI)

PEC JOB NO: JI - 182
ENGINEERING SPECIFICATION FOR

POSITIVE MATERIAL IDENTIFICATION
HWL 0 0003 405 I D 4 A

Page 2

PETROFAC INTERNATIONAL LTD.

ENGINEERING SPECIFICATION FOR PMI

PETROFAC JOB NO. : JI-182

PETROLEUM DEVELOPMENT OMAN

HARWEEL CLUSTER PHASE 2 FACILITIES

PDO CONTRACT NO. C31-0615

TABLE OF CONTENTS PAGE No.

Page 2 of 5 Doc. No.: HWL-0-0003-405-1D4A

Page 3

PETROFAC INTERNATIONAL LTD. PETROLEUM DEVELOPMENT OMAN

ENGINEERING SPECIFICATION FOR PMI HARWEEL CLUSTER PHASE 2 FACILITIES

PETROFAC JOB NO. : JI-182 PDO CONTRACT NO. C31-0615

2. PURPOSE OF PMI
The purpose of PMI is to ensure that the nominal composition of the material specified has been
correctly supplied and installed.

I. SCOPE

3. REFERENCES

RevA

EEMUA 149 Code of Practice for the Identification and
Checking of materials of construction in
pressure systems in process plants

DEP 31.38.01.31 -Gen Shop and Field Fabrication of Piping
HWL-0-0003-406-1 D-4-0 Engineering Specification for Marking and Color Coding

of Piping Materials
ASTM A 751 Standard Test Methods, Practices and Terminology for

Chemical Analysis of Steel Products.
ASTM E 1473 Test Methods for Chemical Analysis of Nickel, Cobalt

and High Temperature Alloys

Rev A I SPE 771302 Materials, Examination and Certification Requirements
for Valves in General Services

This document specifies the basic requirements for conducting positive material identification
(PMI) tests on alloy steel materials in the shop. PMI i s intended to be conducted on all 55316, SS
31 61, 6% Mo, Alloy 825 and Alloy 625 components in piping systems.

4. DEFINITIONS

RevA I Alloy Steel Material : All 55316, SS 316L, 6%Mo, Alloy 825 and Alloy 625 material in any form (Plates, pipes, forgings, castings, welds, clad pipe, lined pipe, welding electrodes etc.)

This document covers the extent of parts to be checked, requirements, approved testing
methods, acceptancelrejection criteria, and marking requirements for PMI.

Positive Material ldentification (PMI) : The method to determine the nominal composition of a
mechanical component.

PEC : Petrofac

Vendor : Mills, Material Manufacturer, Material Component and Finished Product Supplier, Mill
Stockist etc.

5. EXTENT OF VERIFICAl'ION
5.1. PMI shall be performed by the material manufacturer, fabricator, supplier (for example, mill

stockist), or authorized third-party representative. It i s the responsibility of the vendor to ensure
that the implementation and conduct of the PMI program i s performed in accordance with this
document.

5.2. The test methods outlined in this document are intended to identify the nominal composition of
alloy materials. These test methods are not intended to establish the conformance of a material
to a particular alloy specification.

Page 3 of 5 Doc. No.: HWL-0-0003-405-ID-4-A

Page 4

5.4. PMI of weld material shall be performed in the same manner as for the adjacent base metal.

PETROFAC INTERNATIONAL LTD. PETROLEUM DEVELOPMENT OMAN

ENGINEERING SPECIFICATION FOR PMI HARWEEL CLUSTER PHASE 2 FACILITIES

PETROFAC JOB NO. : JI-182 PDO CONTRACT NO. C31-0615

5.5. PMI shall not be considered as a substitute for required mill test reports listing chemical
composition. Mill test reports shall not be considered as confirming alloy verification.

Rev A

5.6. All Alloy materials in all services shall undergo 100% PMI. The extent of PMI for valve components
shall be in accordance with the relevant MESC specification. All Alloy welds including weld
overlay for Cladding shall be subjected to 100% PMI. Following elements shall be examined for
PMI

5.3. PMI shall be performed at the point in time that ensures that proper materials have been used in
the fabrication of an identifiable assembly (such as valves). This i s typically at the supplier's shop
during fabrication or assembly. PMI shall start at the original supplier premises (mills,
forginglcasting shops, stockists etc.). All the wel.ding consumables used in the
manufacture/fabrication of a component shall also be subjected to PMI.

Rev A

6. ALLOY VERIFICATION
6.1. When PMI i s performed by the supplier or a third-party agency, the fabricator or supplier shall

certify that all PMI tests have been performed by qualified personnel in accordance with the
approved procedure. The fabricator or supplier shall also certify that all PMI has been performed
at the point in time that will ensure the correct material has been used.

Rev* I A certificate of verification shall be included in the Manufacturers Record Book (MRB) as part of
final documentation.

6.2. The vendor shall ensure that all involved parties fully understand the PMI requirements which
include the verification method to be used, the period during fabrication when verification will
be conducted, and the method of marking verified material.

6.3. A PMI procedure shall be issued to PEC for approval. This procedure shall, as a minimum include
the following
w Name and Manufacturer of the equipment to be used.
w Description of PMI equipment operating principle.
w Calibration procedure and frequency.

w Timing of the Test (after manufacturing, before fabrication/assembly for shop fabricated
items, after fabrication).

w Detail procedural steps including any surface preparation requirements.
@ Procedure to be followed in case the material does not conform to the intended chemical

composition.
w Radiation safety operation and emergency procedures (as applicable)
w Statement of personnel competency or qualification.
w Documentation / Records Et Formats

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Page 5

PETROFAC INTERNATIONAL LTD. PETROLEUM DEVELOPMENT OMAN

ENGINEERING SPECIFICATION FOR PMI HARWEEL CLUSTER PHASE 2 FACILITIES

PETROFAC JOB NO. : JI-182 PDO CONTRACT NO. C31-0615

6.4. The PMI procedure shall be subject to review by PEC as follows.
The vendor 1 contractor shall submit the alloy verification procedures to PEC for review,
including complete descriptions of the methods and equipment to be used and personnel
qualification procedures.
PEC will review the procedures and qualifications and witness sample alloy verification tests
to the extent necessary to confirm that the procedures, equipment, and personnel are
capable of providing consistent and accurate results.
PEC will check procedures to ensure that positively identified materials are traceable to the
purchase order and/or any required material documentation or mill test reports.
PEC shall have the right to witness the performance of any PMI test.
If the performance of any verification activity i s unacceptable to PEC, or i f any material has
been incorrectly identified, all further tests shall be subject to approval by PEC until such
time as the problem i s corrected.

6.5. Shop-fabricated piping commodities requiring PMI shall have the verification testing done in the
vendor's shop. Alloy verification of weld overlays (Cladding) shall be conducted on similar basis
as that of the solid alloy component.

7. VERIFICATION METHODS
7.1. The instruments or methods used for the examination shall be suitable for identifying the

material by quantitative measurement of the major alloying elements required in the applicable
material specification or welding procedure specification. The preferred method is X-ray emission
analysis with a calibrated portable instrument. The material manufacturer, supplier, or
fabricator performing the verification shall submit procedures for PEC approval. Any X-Ray
emission analyser, such as Texas Nuclear analyser Model 9266 or equivalent with computerised
read-out is acceptable.

7.2. Spark emission spectrography or other methods that leave burn marks on the component shall not
be used. Instruments utilized for conducting PMI shall be subject to review and approval by PEC.

7.3. The selection of the test methods shall ensure that PMI testing as required by this specification
w i l l not cause damage to the component being examined, which would cause it to fail
prematurely in service. The following information regarding the test equipment must be supplied
for approval.
Make and Model
Range of each element
Accuracy of the Instrument expressed as ( +/- )% for each element
Calibration method and certificate
Certificate of Analysis for all calibration standards.

8. ACCEPTANCE CRITERIA
8.1. Materials shall contain the amount of alloying elements specified in applicable ASTM

specification. Welding electrodes and wires shall be within the amount of each alloying element
specified in ASME Section IIC. Alloys, including castings, shall be acceptable i f the alloying
elements are each within the minimum and maximum values permitted by the material
specification.

9. REJECTION CRITERIA
If the PMI test results fall outside the acceptable range using the methods described in Section 7,
the concerned items shall be rejected. The supplier shall be responsible for segregating rejected
items and assuring that they are properly identified to prevent their unauthorized reuse or
removal.

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NOTE : UOI : UNIT OF ISSUE

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