Coated line pipe prepared for new energy transmission service

SPECIAL GRADE 03 — HYDROGEN & NEW ENERGY

Hydrogen transmission pipe — ASME B31.12 / CGA G-5.6 / AIGA 033/14

Pipe for pure hydrogen service, hydrogen blending into gas networks and new-energy transmission projects, engineered to the three hydrogen pipeline standards with controlled chemistry, hardness and full non-destructive examination.

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At a glance

ASME B31.12 CGA G-5.6 AIGA 033/14 API 5L PSL2 X42/L290 – X65/L450 Blending & qualification

WHY HYDROGEN IS DIFFERENT

Three effects drive the material choice

Hydrogen changes the rules for pipeline material. Hydrogen embrittlement, hydrogen corrosion and leakage are the three effects that drive the design: steel grade, heat treatment, welding procedure and inspection are selected around those risks. Pipe supplied for hydrogen service carries the chemistry and hardness controls the project standard requires, together with welding procedure qualification and heat treatment records.

Pure hydrogen transmissionHydrogen blending into gas gridsAmmonia & methanol plants Green hydrogen exportRefinery & petrochemical H2New-energy gas transmission

Design standards	ASME B31.12, CGA G-5.6, AIGA 033/14
Typical grades	API 5L PSL2 X42/L290, X46/L320, X52/L360, X60/L415, X65/L450
Chemistry	Low carbon and low sulphur, restricted carbon equivalent (CE / Pcm) per project
Hardness	Hardness limits agreed per project specification
Testing	Charpy impact testing, UT / RT weld inspection, hydrostatic test
Documents	EN 10204 3.1 mill certificate, WPS / PQR records, heat treatment records

FBE coated pipe ready for hydrogen transmission service — Coated pipe prepared for buried transmission service

Hydrogen pipeline standards

Standard	Scope
ASME B31.12	Hydrogen piping and pipelines (United States)
CGA G-5.6	Hydrogen pipeline system (Europe)
AIGA 033/14	Hydrogen pipeline system (Asia)

Pipe for hydrogen or blended service is quoted against the project's nominated design standard. Material, welding and inspection requirements are confirmed in writing before production.

Hydrogen transmission pipe — questions buyers ask

Which steel grades are used for hydrogen pipelines?

Pure hydrogen service is normally specified in API 5L PSL2 grades up to X52/L360 or X65/L450, with low carbon, low sulphur and restricted carbon equivalent and hardness. Higher grades such as X70 or X80 require project-specific qualification for hydrogen service.

Which standards apply to hydrogen pipelines?

ASME B31.12 covers hydrogen piping and pipelines in the United States, CGA G-5.6 covers hydrogen pipeline systems in Europe, and AIGA 033/14 covers the Asian Industrial Gases Association hydrogen pipeline system. Project specifications normally name one of these as the design basis.

Can the same pipe be used for hydrogen blending?

Blending into existing natural gas networks is assessed case by case: blend percentage, operating pressure, existing grade and toughness govern. Blended service normally requires API 5L PSL2 pipe with a certified Charpy impact result.

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Send the standard, outside diameter, wall thickness, grade, quantity and destination port. If you only have a tender document or a piping class, send that instead — we will read it and come back with the pipe specification.

Sales e-mail	info@yuxindapipe.com
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Works & port	Tianjin, China — 40 minutes from Tianjin Port
Working hours	Monday–Saturday, 08:30–20:00 (GMT+8)
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