os-c401_2010-10.pdf

(1626 KB) Pobierz
OFFSHORE STANDARD
DNV-OS-C401
FABRICATION AND TESTING
OF OFFSHORE STRUCTURES
OCTOBER 2010
D ET N ORSKE V ERITAS
1504364166.008.png 1504364166.009.png 1504364166.010.png
 
1504364166.001.png 1504364166.002.png 1504364166.003.png 1504364166.004.png
FOREWORD
DET NORSKE VERITAS (DNV) is an autonomous and independent foundation with the objectives of safeguarding life,
property and the environment, at sea and onshore. DNV undertakes classification, certification, and other verification and
consultancy services relating to quality of ships, offshore units and installations, and onshore industries worldwide, and
carries out research in relation to these functions.
DNV service documents consist of amongst other the following types of documents:
— Service Specifications. Procedual requirements.
— Standards. Technical requirements.
— Recommended Practices. Guidance.
The Standards and Recommended Practices are offered within the following areas:
A)
Qualification, Quality and Safety Methodology
B)
Materials Technology
C)
Structures
D)
Systems
E)
Special Facilities
F)
Pipelines and Risers
G)
Asset Operation
H)
Marine Operations
J)
Cleaner Energy
O)
Subsea Systems
The electronic pdf version of this document found through http://www.dnv.com is the officially binding version
© Det Norske Veritas
Any comments may be sent by e-mail to rules@dnv.com
For subscription orders or information about subscription terms, please use distribution@dnv.com
Computer Typesetting (Adobe Frame Maker) by Det Norske Veritas
If any person suffers loss or damage which is proved to have been caused by any negligent act or omission of Det Norske Veritas, then Det Norske Veritas shall pay compensation to
such person for his proved direct loss or damage. However, the compensation shall not exceed an amount equal to ten times the fee charged for the service in question, provided that
the maximum compensation shall never exceed USD 2 million.
In this provision "Det Norske Veritas" shall mean the Foundation Det Norske Veritas as well as all its subsidiaries, directors, officers, employees, agents and any other acting on behalf
of Det Norske Veritas.
Offshore Standard DNV-OS-C401, October 2010
Changes – Page 3
CHANGES
• General
As of October 2010 all DNV service documents are primarily published electronically.
In order to ensure a practical transition from the “print” scheme to the “electronic” scheme, all documents
having incorporated amendments and corrections more recent than the date of the latest printed issue, have been
given the date October 2010.
An overview of DNV service documents, their update status and historical “amendments and corrections” may
be found through http://www.dnv.com/resources/rules_standards/.
• Main changes
Since the previous edition (October 2009), this document has been amended, most recently in October 2010.
All changes have been incorporated and a new date (October 2010) has been given as explained under “General”.
D ET N ORSKE V ERITAS
1504364166.005.png
 
Offshore Standard DNV-OS-C401, October 2010
Page 4 – Contents
CONTENTS
CH. 1 INTRODUCTION .............................................................................................................................. 7
Sec. 1 Introduction ........................................................................................................................................ 8
A. General ............................................................................................................................................................................ 8
A 100
Introduction........................................................................................................................................................... 8
A 200
Objective ............................................................................................................................................................... 8
A 300
Organisation of contents ....................................................................................................................................... 8
B. Normative References..................................................................................................................................................... 8
B
100
General .................................................................................................................................................................. 8
B
200
Offshore service specifications and rules ............................................................................................................. 8
B
300
Offshore Standards................................................................................................................................................ 8
B
400
Other references .................................................................................................................................................... 9
C. Informative References ................................................................................................................................................... 9
C
100
General .................................................................................................................................................................. 9
D. Definitions....................................................................................................................................................................... 9
D 100
Verbal forms ......................................................................................................................................................... 9
D 200
Terms .................................................................................................................................................................. 10
D 300
Abbreviations...................................................................................................................................................... 11
D 400
Latin symbols...................................................................................................................................................... 11
D 500
Greek symbols .................................................................................................................................................... 12
CH. 2
TECHNICAL PROVISIONS.......................................................................................................... 13
Sec. 1
Welding Procedures and Qualification of Welders....................................................................... 14
A. Introduction ................................................................................................................................................................... 14
A 100
General ................................................................................................................................................................ 14
A 200
Wide gap welding .............................................................................................................................................. 14
A 300
Welding processes .............................................................................................................................................. 14
B. Welding Procedures ...................................................................................................................................................... 14
B
100
General ................................................................................................................................................................ 14
B
200
Preliminary welding procedure specification, pWPS ......................................................................................... 15
B
300
Welding Procedure qualification test (WPQT)................................................................................................... 15
B
400
Welding procedure qualification record (WPQR) .............................................................................................. 15
B
500
Welding procedure specifications (WPS) ........................................................................................................... 15
C. Welding Procedure Tests, C-Mn Steel
and Low Alloy Steel ..................................................................................................................................................... 16
C
100
General ................................................................................................................................................................ 16
C
200
Butt welds on plates ............................................................................................................................................ 16
C
300
Butt welds in pipes.............................................................................................................................................. 20
C
400
Full penetration T-, Y-, and K- joints ................................................................................................................. 21
C
500
Tubular joints/ Branch connections .................................................................................................................... 22
C
600
Fillet welds.......................................................................................................................................................... 23
C
700
Re-testing ............................................................................................................................................................ 23
C
800
Validity of a WPS ............................................................................................................................................... 23
C
900
Fracture mechanic (FM) testing ......................................................................................................................... 27
D. Welding Procedure Tests, Aluminium.......................................................................................................................... 29
D 100
General ................................................................................................................................................................ 29
D 200
Butt welds ........................................................................................................................................................... 29
D 300
Fillet welds.......................................................................................................................................................... 32
D 400
Re-testing ............................................................................................................................................................ 32
E. Welding Procedure Tests, Stainless Steel ..................................................................................................................... 33
E
100
General ................................................................................................................................................................ 33
E
200
Supplementary requirements for austenitic stainless steel.................................................................................. 33
E
300
Supplementary requirements for ferritic-austenitic stainless steel (duplex)....................................................... 33
F. Qualification of Welders ............................................................................................................................................... 34
F
100
General ................................................................................................................................................................ 34
F
200
Standards for qualification testing ...................................................................................................................... 34
G. Testing........................................................................................................................................................................... 34
G 100
General ................................................................................................................................................................ 34
G 200
Tensile testing at ambient temperature ............................................................................................................... 34
D ET N ORSKE V ERITAS
1504364166.006.png
 
Offshore Standard DNV-OS-C401, October 2010
Contents – Page 5
G 300
Bend testing ........................................................................................................................................................ 35
Sec. 2 Fabrication and Tolerances............................................................................................................. 37
A. General .......................................................................................................................................................................... 37
A 100
Objective and scope ............................................................................................................................................ 37
B. Fabrication Planning ..................................................................................................................................................... 37
B
100
General ................................................................................................................................................................ 37
B
200
Quality system and workmanship....................................................................................................................... 37
C. Inspection ...................................................................................................................................................................... 37
C
100
General ................................................................................................................................................................ 37
D. Material Identification, Cutting and Forming ............................................................................................................... 38
D 100
Material identification......................................................................................................................................... 38
D 200
Cutting and forming............................................................................................................................................ 38
E. Tolerances ..................................................................................................................................................................... 39
E
100
Tolerances for alignment and straightness ......................................................................................................... 39
F. Assembly, Welding, Heat Treatment and Repairs ........................................................................................................ 43
F
100
Assembly and welding........................................................................................................................................ 43
F
200
Post weld heat treatment (PWHT) ...................................................................................................................... 46
F
300
Repairs ................................................................................................................................................................ 47
F
400
Flame straightening............................................................................................................................................. 48
Sec. 3 Non-Destructive Testing .................................................................................................................. 49
A. General .......................................................................................................................................................................... 49
A 100
Scope................................................................................................................................................................... 49
B. Non-Destructive Testing (NDT) ................................................................................................................................... 49
B
100
General ................................................................................................................................................................ 49
B
200
NDT procedures.................................................................................................................................................. 49
B
300
Personnel qualification ....................................................................................................................................... 49
B
400
Extent of NDT .................................................................................................................................................... 49
B
500
Acceptance criteria for NDT............................................................................................................................... 52
Sec. 4
Other Tests........................................................................................................................................ 54
A. General .......................................................................................................................................................................... 54
A 100
Scope................................................................................................................................................................... 54
B. Testing of Tightness...................................................................................................................................................... 54
B
100
General ................................................................................................................................................................ 54
C. Structural Tests ............................................................................................................................................................. 54
C
100
General ................................................................................................................................................................ 54
Sec. 5
Corrosion Protection Systems ......................................................................................................... 56
A. General .......................................................................................................................................................................... 56
A 100
Scope................................................................................................................................................................... 56
A 200
General ................................................................................................................................................................ 56
A 300
Application of coating ........................................................................................................................................ 56
A 400
Fabrication and installation of sacrificial anodes................................................................................................ 56
A 500
Fabrication and installation of impressed current systems ................................................................................. 57
Sec. 6 Miscellaneous .................................................................................................................................... 58
A. Use General................................................................................................................................................................... 58
A 100
Scope................................................................................................................................................................... 58
B. Bolts .............................................................................................................................................................................. 58
B
100
Bolts and nuts...................................................................................................................................................... 58
C. Mechanical Fastening ................................................................................................................................................... 58
C
100
Contact surfaces in slip resistant connections..................................................................................................... 58
CH. 3
CERTIFICATION AND CLASSIFICATION .............................................................................. 59
Sec. 1
General .............................................................................................................................................. 60
A. General Requirements................................................................................................................................................... 60
A 100
Introduction......................................................................................................................................................... 60
D ET N ORSKE V ERITAS
1504364166.007.png
 

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin