Code For Hydrogen Pipelines - Energy.gov

Code for HydrogenPipelinesHydrogen PipelineWorking Group WorkshopAugusta, GeorgiaAugust 31, 2005Louis Hayden, PEChair ASME B31.122

Presentation Outline Approval for new code development Charge from BPTCS to B31Standards Committee for HydrogenPiping/Pipeline code development B31.12 Status & Structure Hydrogen Pipeline issues Research Needs Where Do We Go From Here?3

Code for Hydrogen Pipingand Pipelines B31 Hydrogen Section Committee to developa new code for H2 piping and pipelines– Include requirements specific to H2 service for power,process, transportation, distribution, commercial, andresidential applications– Balance reference and incorporation of applicable sectionsof B31.1, B31.3 and B31.8– Have separate parts for industrial, commercial/residentialand pipelines– Include new requirements for construction, operation, andmaintenance4

Performance-Based vs.Prescriptive Standards Performance-Based––– Prescriptive–– 5States goals and objectives to be achievedDescribes acceptable methods to determine goals andobjectives have been metFocuses on desired characteristics of final productPrescribes materials, design, construction requirementswithout stating goals and objectivesFocuses on requirements for processes to produce thefinal productASME standards include both prescriptiveand performance-based elements

Hydrogen StandardsDevelopment Project Schedule 6Task force Recommendations- CompleteBPTCS Action- CompleteTechnical Reports: Jul ’04 – Nov ’05Draft Standard Available: Nov ’05B31 Standards Committee: Nov ’05 – Nov’06Finalize Standard : Mar ’07Publish : 3rd Quarter ‘07

ASME B31.12 Structure and Basis B31.12 is divided into three subsections– Section A: Industrial Piping– Section B: Pipelines and Distribution Piping– Section C: Residential piping There is also a section for the common useand reference by sections A, B and C7

Section B: Pipeline andDistribution Piping Model document for section B isASME B31.8 Anticipated operating ranges:– Pressure: full vacuum to 3,000 psig– Temperature: - 40 F to 300 F8

Common Section This section of the code will be located atthe front of the code book and contain thefollowing information:––––Scope of the codeMaterials sectionWelding and forming sectionOperation and maintenance section The above sections will be referenced bySections A, B and C.9

Hydrogen Pipeline Issues Materials- Loss of 30% in toughness &15% burst strength- Rapid hydrogen assistedfatigue crack growth- Sustained-load cracking inHAZ of welds10

Hydrogen Pipeline Issues Materials (cont’d)- Are micro-alloyed steels moreresistant to the effects ofhydrogen environments- Do FRP pipes offer advantagesover metallic pipe in hydrogenservice11

Hydrogen Pipeline Issues Materials (cont’d)- Liner material for FRP pipe- Design analysis method forFRP pipeline system- Expected design life of FRPPipeline12

Hydrogen Pipeline Issues Public Perspective & Education- Common perception ofhydrogen- Public Education with realinformation13

Research Needs Testing of all commonly used pipelinematerials for loss of fatigue and impactstrength in a high pressure hydrogenenvironment. Research the effects ofpressure cycling on mechanical properties Testing of pipe welds for sustained-loadcracking for all commonly used pipelinematerials. Review as welded, post weld heattreated and annealed weld performance14

Research Needs Determine if FRP pipes with metallic orplastic liners are viable alternatives formetallic pipes. Test joining methods forhydrogen compatibility. Develop asimplified analysis method for these pipes. Testing of commonly used plastic pipematerials for compatibility with high purityhydrogen environments. Test bonded andfusion joints for hydrogen resistance15

Where Do We Go From Here? Near term, the ASME B31.12 Task Groupwill utilize “Design Factors” to makesystem design more conservative untilactual material test data is available Encourage Risk Analysis of converted andnew hydrogen pipeline systems Impose System Integrity Managementusing ASME B31.8S as a model16

Where Do We Go From Here? Require in-service inspection, systemmaintenance and operator training withqualification for converted and newsystems. Reference B31Q (not yetpublished) Review results of material testingprograms, operating results and servicehistories and adjust ASME B31.12 asneeded17

Where Do We Go From Here? Education of the public through ajoint effort by DOE in partnershipwith ASME.18

Hydrogen Pipeline Working Group Workshop: Code for Hydrogen Pipelines Subject: Code for Hydrogen Piping and Pipelines. B31 Hydrogen Section Committee to develop a new code for H2 piping and pipelines. Created Date: 9/29/2005 2:14:32 PM