DNVGL-ST-F101 Submarine pipeline systems

1 The electronic pdf version of this document, available free of chargefrom , is the officially binding GL ASSTANDARDDNVGL-ST-F101 Edition October 2017 Amended December 2017 Submarine pipeline systemsFOREWORDDNV GL standards contain requirements, principles and acceptance criteria for objects, personnel,organisations and/or operations. DNV GL AS October 2017 Any comments may be sent by e-mail to service document has been prepared based on available knowledge, technology and/or information at the time of issuance of thisdocument. The use of this document by others than DNV GL is at the user's sole risk. DNV GL does not accept any liability or responsibilityfor loss or damages resulting from any use of this document. Changes - currentStandard DNVGL-ST-F101 . Edition October 2017, amended December 2017 Page 3 Submarine pipeline systemsDNV GL ASCHANGES CURRENTThis document supersedes the October 2017 edition of in this document are highlighted in red colour.

2 However, if the changes involve a whole chapter,section or sub-section, normally only the title will be in red December 2017 Design - materials engineering [ ] Reference for gauging requirements has been October 2017 Introduction Rigid risers have been excluded and will be covered in the next revision of DNVGL-ST-F201. This affectsseveral places. Requirements to technology qualification of new technologies. Defect has been defined Design loads Minor editorial changes and updates Previous section 4G400 and 5C500 have been merged into [ ] and updated. Design limit state criteria Minor editorial changes and updates [ ] has been re-organised except for mitre bend angle that has been reduced from three to twodegrees. [ ] has been modified. More guidance is given in general (see also Table 8-1 and [ ]).

3 Somespecific requirements for replacing the system pressure test (old table 5-1) has been removed. [ ] The format has been modified slightly. The resistance safety factor, sc, has now got an additionalindex for the relevant limit state. The reason is that the number of sc s are increasing. This also impliesthat has become sc,dc. [ ] Name of some limit states and headings have been modified to make it consistent with Table 5-7. [ ] The criterion has been re-formulated (but is identical) except for the pressure term modified inline with Safebuck JIP. [ ] Requirements to fracture and fatigue have been updated and are stated in [ ]. Forrecommended practice on how to perform this, new revision of DNV GL-RP-F108 is pointed to. Appendix Ais removed. [ ] The term sensitive welds has been introduced. [ ] References to other standards have been updated.

4 [ ] New. From installation JIP. Changes - currentStandard DNVGL-ST-F101 . Edition October 2017, amended December 2017 Page 4 Submarine pipeline systemsDNV GL AS Construction linepipe Changes and modifications to the following: Steel making and plate rolling essential variables [ ] Hydrogen content [ ] Hydrostatic testing [ ] Subsection [ ], [ ], [ ], [ ]. Added clarifications and more requirements to coiled line pipe [ ] Requirements to explosion welded clad plates added [ ] Requirements to dimensions and geometrical measurements have been updated based on a specificworkshop with the industry. Further, a minimum diameter of 60 mm has been specified. Dimensionalrequirements to smaller pipes have been modified and harmonized with common coil tubing pipes [ ] Supp. F; Guidance note to DWTT added, acknowledging challenges with inverse fracture for hightoughness materials and supporting a similar statement in API RP 5L3.

5 [ ] Supp. P; Has been modified. [ ] Supp. U; Modified to include both approaches to achieve Suffix U; retrospective documentationand as part of production testing. Restructuring of content to better clarify requirements. Construction - components and pipeline assemblies Restructuring of content to better clarify requirements. Table 8-1 has been modified. DNVGL-RP-0034 is acknowledged as an alternative material specification for forged CMn steel. Documentation Some requirements to documentation in other sections have been moved to this section. A reference toDNVGL-RP-O101 is also included. Sec. 13 Commentary (informative) [ ] Roadmap for use of this standard with pipe-in-pipe systems based on workshop series JIP- Fracture limit state of girth welds Empty - moved to new revision of DNVGL-RP-F108.

6 Mechanical testing and corrosion testingMinor changes and modifications, to the following: References to DNVGL-RP-F108 added Reference to BS 8571 for SENT added Clarifications to all-weld tensile testing. WeldingIn general only minor updates on reference standards and some changes to clarify paragraphs. [ ] Batch testing modified to be sampled in same positions as WPQ [ ] Maximum heat input variation for multiple pieces more clarified [ ] Added requirement for heat input range to be stated on WPS Changes - currentStandard DNVGL-ST-F101 . Edition October 2017, amended December 2017 Page 5 Submarine pipeline systemsDNV GL AS [ ] Maximum interpass temperature for welding of solid CRA and in root and hot pass for lined/ clad carbon steel increased to 1500C. Non-destructive testing [ ] Fully revised requirements for pipe body inspection (usually applicable for plate mills for SAWL).

7 [ ] Added requirement to use 2 angles in AUT setup for inspection of longitudinal imperfections. Automated ultrasonic girth weld testing [ ] Added requirement to evaluate impact on sensitivity of long seam weld [ ] Added requirement for inspection of CRA welds and materials [ ] Added requirement for monitoring wall thickness upon AUT inspection of SMLS pipe girth welds. [ ] Accommodate for use of adaptive focal laws [ ] Added requirement to include SDH reflector for TOFD in reference block [ ] Revised acceptance criteria for porosity, Table E-1 [ ] Added workmanship acceptance criteria for fatigue sensitive welds [ ] Added generalised requirements to number of imperfections within scope of AUT qualification [ ] Reduced requirements to CCW scanning of defective welds in AUT qualification, now 1 weld isrequired.

8 [ ] Added requirement to demonstrate stability upon repeated inspection in AUT validation. Requirements for shore crossing and onshore sections Updated on land fall, now referred to as shore crossing based on the Crossway JIP by AtterisEditorial correctionsIn addition to the above stated changes, editorial corrections may have been made. Changes - currentStandard DNVGL-ST-F101 . Edition October 2017, amended December 2017 Page 6 Submarine pipeline systemsDNV GL ASAcknowledgementsThe present revision of DNVGL-ST-F101 is mainly reflecting feed-back from experience by several companiesthat are hereby acknowledged. The comments improved the quality and content of this standard significantlyand the effort spent by the commenting companies is impressive and hereby revision includes results from the following JIP's sponsored by the listed companies.

9 Their contribution ishereby JIPThe following companies, listed in alphabetical order, are acknowledged for their contributions to the JIPABBHHINOVT echnipAllseasJFE SteelPetrobrasTideway Offshore SolutionsBureau VeritasKW/PetrofacSaipemVBMSEMASMcDermot tStatoilWoodGroup KennyHeermea Marine ContractorsNexansSubsea7 WoodsidePipe-in-pipe workshop series JIPThe following companies, listed in alphabetical order, are acknowledged for their contributions to the JIPG enesisITPS hellTechnipHMCP etrobrasSubsea7 Vision oil and WilliamsonWood Group KennyCrossway JIP performed by JIP peformed by Atkins. ContentsStandard DNVGL-ST-F101 . Edition October 2017, amended December 2017 Page 7 Submarine pipeline systemsDNV GL ASCONTENTSC hanges 1 Alternative methods and Structure of 2 Safety Safety philosophy Risk basis for 49 Section 3 Concept and design premise Concept Design System design 4 Design - Functional Environmental Construction Interference Accidental Design load 5 Design limit state System design Design Limit ContentsStandard DNVGL-ST-F101 .

10 Edition October 2017, amended December 2017 Page 8 Submarine pipeline systemsDNV GL Special pipeline Supporting Installation and 6 Design - materials Materials selection for line pipe and pipeline Materials Corrosion 136 Section 7 Construction Carbon Manganese (C-Mn) steel Corrosion resistant alloy clad or lined steel Hydrostatic Non-destructive Dimensions, mass and Marking, delivery condition and Supplementary 8 Construction - components and pipeline Component Mechanical and corrosion pipeline Hydrostatic Documentation, records, certification and 9 Construction - corrosion protection and weight External corrosion protective Concrete weight Manufacture of galvanic Installation of galvanic 10 Construction ContentsStandard DNVGL-ST-F101 .