Use of International Standard NACE MR0175-ISO15156 Canadian Association of Petroleun Industry.pdf

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GUIDE
Use of International Standard
NACE MR0175/ISO15156
International Standard NACE MR0175/ISO15156 -
Petroleum and Natural Gas Industries – Materials for use
in H
2
S-containing Environments in Oil and Gas
Production
December 2005
2005-0042
The Canadian Association of Petroleum Producers (CAPP) represents 150
companies that explore for, develop and produce natural gas, natural gas liquids,
crude oil, oil sands, and elemental sulphur throughout Canada. CAPP member
companies produce more than 95 per cent of Canada’s natural gas and crude oil.
CAPP also has 130 associate members that provide a wide range of services that
support the upstream crude oil and natural gas industry. Together, these members
and associate members are an important part of a $100-billion-a-year national
industry that affects the livelihoods of more than half a million Canadians.
Review by December 2008
Disclaimer
This publication was prepared for the Canadian Association of Petroleum
Producers (CAPP) by the members of the CAPP Pipeline Technical Committee.
While it is believed that the information contained herein is reliable under the
conditions and subject to the limitation set out, CAPP does not, guarantee its
accuracy. The use of this report or any information contained will be the user’s
sole risk, regardless of any fault or negligence of CAPP or its co-funders.
2100, 350 – 7
th
Ave. S.W.
Calgary, Alberta
Canada T2P 3N9
Tel (403) 267-1100
Fax (403) 261-4622
904, 235 Water Street
St. John’s, Newfoundland
Canada A1C 1B6
Tel (709) 724-4200
Fax (709) 724-4225
Email: communication@capp.ca Website: www.capp.ca
TABLE OF CONTENTS
1
2
3
4
Objective .......................................................................................................................3
Background...................................................................................................................3
2.1
Abbreviated Terms ..........................................................................................4
NACE MR0175 / ISO 15156 Interpretation and Maintenance .................................4
From NACE MR0175 to NACE MR0175/ISO15156 ...............................................5
4.1
Significant changes to previous MR0175: .....................................................5
4.1.1 Responsibilities for Various Users of the Document........................5
4.1.2 Changes that affect only the Carbon Steel Alloys ............................6
4.1.3 Changes that affect only the Corrosion Resistant Alloys .................6
4.1.4 Other Options for Material Qualifications.........................................8
4.1.5 Requirements for Marking (Part 2, Section 9; Part 3, Section 7).....8
Part 1 - General Principles for Selection of Cracking-Resistant Materials..8
5.1.1 Scope of the Standard - Equipment and Component Design (Section 1)
..............................................................................................................9
5.1.2 Service Conditions: Evaluation and Definition (Section 6) .............9
5.1.3 Pre-Qualified Materials Selection Guide (Section 7) .......................9
5.1.4 Material Qualification Alternatives and Implementation (Section 8)9
5.1.5 Materials Qualification Documentation (Section 9) .......................10
Part 2: Cracking-Resistant Carbon and Low Alloy Steels ..........................10
5.2.1 Scope of the Standard - Equipment and Component Design (Section 1)
............................................................................................................10
5.2.2 Carbon and Low Alloy Steels in H2S environments (Section 6)...10
5.2.3 Qualification and Selection (Section 7) ...........................................11
5.2.4 Evaluation for resistance to HIC and SWC (Section 8)..................11
5.2.5 Marking (Section 9) ..........................................................................11
5.2.6 Annexes .............................................................................................12
Part 3: Cracking-Resistant CRAs and Other Alloys....................................12
5.3.1 Scope of the Standard - Equipment and Component Design (Section 1)
............................................................................................................12
5.3.2 Corrosion Resistant Alloys in H2S environments (Section 5) .......12
5.3.3 Qualification and Selection (Section 6) ...........................................12
5.3.4 Purchasing Information and Marking (Section 7)...........................13
5.3.5 Annexes .............................................................................................13
Select Qualification Method (Refer to Appendix C, Figure C.1)...............14
6.1.1 Scope of MR0175/ISO 15156 ..........................................................14
5
Structure of New Document........................................................................................8
5.1
5.2
5.3
6
End User’s Application Guideline for MR0175/ISO 15156 ...................................14
6.1
i
6.2
6.3
6.1.2 Existing Facilities vs. New Projects.................................................14
6.1.3 Existing Facilities..............................................................................15
6.1.4 New Projects......................................................................................15
6.1.5 Alternative Materials Qualification..................................................15
Qualification By Field Experience
(Refer to Appendix C, Figure C.2)
.....16
6.2.1 Material Qualification by Field Experience ....................................16
6.2.2 Describe and document the materials to be qualified .....................16
6.2.3 Describe and document the service environment............................16
6.2.4 Compile the Service History for a minimum of 2 years .................16
6.2.5 Inspection of the in-service material................................................17
6.2.6 Intended Service Environment <= Documented Service Environment
............................................................................................................17
6.2.7 Report and file documentation .........................................................17
Qualification by Laboratory Testing (Refer to Appendix C, Figure C.3)..18
6.3.1 Material Qualification by Laboratory testing..................................18
6.3.2 Select material type and refer to the applicable part of NACE/ISO
standard..............................................................................................18
6.3.3 Select the laboratory qualification option that best fits the application
............................................................................................................18
6.3.4 Identify the Qualification Required .................................................18
6.3.5 Select the Test Method......................................................................18
6.3.6 Establish the Test Conditions ...........................................................18
6.3.7 Specify the Acceptance Criteria for each test method ....................19
6.3.8 Report the Test Results .....................................................................19
7
8
9
10
11
12
13
Other Issues ................................................................................................................19
References...................................................................................................................19
Participants and Acknowledgements ........................................................................19
Appendices .................................................................................................................21
10.1
MATERIAL SELECTION/QUALIFICATION WORKSHEET ...............34
Equipment/Pipeline Location ....................................................................................34
Material Selection/Qualification ...............................................................................34
Service Conditions .....................................................................................................34
13.1
13.2
13.3
Acceptability Bases for Selection for SSC/SCC Resistant Materials (CLAUSE
7:MR0175/ISO 15156-1) ..............................................................................35
35
Qualification Requirements/Testing Conditions .........................................35
ii
1
Objective
The NACE MR0175/ISO 15156 International Standard for the selection of crack-
resistant materials for use in H2S-containing environments has had a significant
impact on various aspects of the oil & gas industry in Canada. For this reason,
CAPP Pipeline Technical Committee felt it was important to create a supporting
document, which could be used by industry as a reference tool to:
•
•
•
provide a brief overview of the NACE/ISO publication, outlining the most
significant changes and their implication to the industry,
provide guidance and assistance on how to apply the new publication using
simple to follow flowcharts, and clarification examples,
provide sample forms which could be used to meet the intent of the
publication.
This document is not intended to supersede the NACE MRO175/ISO 15156
International Standard. It is intended to serve a as a Guide for working with and
complying with the NACE MRO175/ISO 15156 International Standard. In the
case of any inconsistencies between the NACE MRO175/ISO 15156 International
Standard and the guidance provided in this document, the International Standard
should be adhered to.
2
Background
The first edition of the NACE Standard MR0175 was published in 1975 by the
National Association of Corrosion Engineers, now known as NACE International.
The objective of NACE Standard MR0175 was to establish limits of H2S partial
pressure for precautions against sulfide stress cracking (SSC). It was also
designed to provide guidance for the selection and specification of SSC-resistant
materials when the H2S thresholds were exceeded. In more recent editions,
NACE MR0175 has also provided application limits for some corrosion-resistant
alloys, in terms of environmental composition and pH, temperature and H2S
partial pressure.1
In a joint, cooperative effort, the members of NACE and the European Federation
of Corrosion (EFC) became co-leaders of the ISO/TC 67/WG 7 project. This
effort introduced fundamental changes to the MR0175, incorporating industrial
practices and testing methodologies previously not addressed by MR0175.2. The
first full edition of MR0175/ISO 15156 was published in 2003.
As stated above, the new standard addresses issues which were not considered in
the previous versions of NACE MR0175-2002 and which may have significant
implications for the users of the document. For example, the new standard:
•
acknowledges, in addition to sulphide stress cracking, other potentially
catastrophic failure mechanisms resulting from sour environments. Such
mechanisms are specified in MR0175/ISO 15156-1:2001 as chloride stress
corrosion cracking, hydrogen-induced cracking and stepwise cracking, stress
December 2005
Guide on the Use of International Standard NACE
Page 3

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