NORSOK M-101 ENG.pdf

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NORSOK STANDARD
M-101
Edition 5, October 2011
Structural steel fabrication
This NORSOK standard is developed with broad petroleum industry participation by interested parties in the
Norwegian petroleum industry and is owned by the Norwegian petroleum industry represented by The Norwegian
Oil Industry Association (OLF) and The Federation of Norwegian Industry. Please note that whilst every effort has
been made to ensure the accuracy of this NORSOK standard, neither OLF nor The Federation of Norwegian
Industry or any of their members will assume liability for any use thereof. Standards Norway is responsible for the
administration and publication of this NORSOK standard.
Standards Norway
Strandveien 18, P.O. Box 242
N-1326 Lysaker
NORWAY
Copyrights reserved
Telephone: + 47 67 83 86 00
Fax: + 47 67 83 86 01
Email: petroleum@standard.no
Website: www.standard.no/petroleum
NORSOK standard M-101
Edition 5, October 2011
Foreword
Introduction
1
2
Scope
Normative and informative references
2.1
Normative references
2.2
Informative references
Terms, definitions and abbreviations
3.1
Terms and definitions
3.2
Abbreviations
Selection of steels
4.1
Design classes
4.2
Selection of steel quality level
Qualification of welding procedures and welders
5.1
Welding procedure specification (WPS)
5.2
Qualification of welding procedures
5.3
Welding procedure qualification record (WPQR) - Range of approval
5.4
Examination of the test weld
5.5
Welder and welding operators qualifications
Fabrication and welding requirements
6.1
General
6.2
Drawings for fabrication
6.3
Welding coordination
6.4
Welding inspection and qualification of welding inspectors
6.5
Forming
6.6
Assembly
6.7
Preparation for coatings
6.8
Preparation and fit-up of weld bevels
6.9
Welding processes
6.10 Welding consumables
6.11 Preheat and interpass temperature
6.12 Production welding
6.13 Post weld heat treatment (PWHT)
6.14 Grinding
6.15 Peening
Production tests
Fabrication tolerances
Non-destructive testing (NDT)
9.1
General
9.2
Qualification of non-destructive testing (NDT) operators
9.3
Extent of visual examination and non-destructive testing (NDT)
9.4
Visual examination and finish of welds
9.5
Radiographic testing
9.6
Ultrasonic testing
9.7
Magnetic particle and penetrant testing
9.8
Acceptance criteria
10.1
10.2
10.3
10.4
10.5
Repair
Definitions
Correction of welds containing defects
Repair by welding
Repair welding procedure
Correction of distortion
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Annex A (Informative) Details for high fatigue utilisation
Annex B (Informative) Correlation between steel quality level, MDS number and steel
grade/designations
NORSOK standard
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NORSOK standard M-101
Annex C (Normative) Qualification of welding consumables by data sheets
Annex D (Normative) Welding consumable documented by batch testing
Annex E (Normative) Fabrication tolerances
Annex F (Informative) Weld inspection, typical check points
Annex G (Normative) Components in stainless steel and Ni-alloys
Edition 5, October 2011
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NORSOK standard
Page 4 of 62
NORSOK standard M-101
Edition 5, October 2011
Foreword
The NORSOK standards are developed by the Norwegian petroleum industry to ensure adequate safety,
value adding and cost effectiveness for petroleum industry developments and operations. Furthermore,
NORSOK standards are, as far as possible, intended to replace oil company specifications and serve as
references in the authorities’ regulations.
The NORSOK standards are normally based on recognised international standards, adding the provisions
deemed necessary to fill the broad needs of the Norwegian petroleum industry. Where relevant, NORSOK
standards will be used to provide the Norwegian industry input to the international standardisation process.
Subject to development and publication of international standards, the relevant NORSOK standard will be
withdrawn.
The NORSOK standards are developed according to the consensus principle generally applicable for most
standards work and according to established procedures defined in NORSOK A-001.
The NORSOK standards are prepared and published with support by The Norwegian Oil Industry Association
(OLF), The Federation of Norwegian Industry, Norwegian Shipowners’ Association and The Petroleum Safety
Authority Norway.
NORSOK standards are administered and published by Standards Norway.
Annex A, B and F are informative. Annexes C, D, E and G are normative.
Introduction
Edition 5 of this NORSOK standard has been necessary due to an extensive change in referenced
international standards. In addition new annexes have been included. Some corrections and improvements
have also been implemented
NORSOK standard
Page 5 of 62

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