316L Large Diameter Stainless Steel Pipes (DN300+) For LNG Cryogenic Applications

316L Large Diameter Stainless Steel Pipes (DN300+) for LNG Cryogenic Applications 

 

 

High-Performance Solution for LNG Cryogenic Pipelines

Our 316L large diameter stainless steel pipes are specially designed for DN300 and above LNG low-temperature pipeline systems, meeting the stringent safety and performance requirements of Vietnam and Indonesia's expanding LNG infrastructure.

Manufactured under ASTM A312, EN 10216-5, and JIS G3463 standards, these pipes offer excellent cryogenic toughness, outstanding chloride corrosion resistance, and minimal thermal expansion, making them the preferred choice for LNG storage, transfer, and regasification facilities.

 

Why 316L Stainless Steel for LNG pipe?

LNG pipelines utilize 316L stainless steel, which maintains excellent ductility and toughness even at temperatures as low as -196°C. It withstands the seawater and high-chloride environments found at coastal LNG terminals and offers excellent corrosion resistance. Its low carbon content reduces the risk of sensitization and intergranular corrosion during welding, ensuring reliable operation for over 20 years with minimal maintenance.
GNEE Stainless Steel offers custom large-diameter pipes from DN300 to DN1200, in both seamless and welded options, to fully meet the stringent requirements of LNG transportation.

 

ASTM A312 316L Large Diameter Stainless Steel Pipe Specification

Parameter	Specification Range	Standard Compliance
Material Grade	316L (UNS S31603, EN 1.4404)	ASTM A312, EN 10216-5
Diameter (DN)	DN300 – DN1200	Custom sizes available
Wall Thickness	4 mm – 50 mm	Schedule 10S – Schedule 160
Length	6 m – 12 m	Cut-to-length available
Type	Seamless / Welded	GTAW / SAW welding
Surface Finish	Pickled & passivated / Polished	For improved corrosion resistance
Tensile Strength	≥ 485 MPa	ASTM A312
Yield Strength	≥ 170 MPa	ASTM A312
Impact Toughness	≥ 100 J at -196°C	LNG-grade performance
Corrosion Test	1000+ hours salt spray resistance	ASTM B117

 

If you have any project requirements, please contact us to get competitive prices for 316L large diameter stainless steel pipes.

 

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Q1: Can 316L stainless steel pipes handle -196°C LNG temperatures?
A1: Yes, 316L maintains ductility and toughness even at LNG boiling temperatures, making it ideal for cryogenic service.

Q2: Are welded large diameter pipes safe for LNG transfer lines?
A2: When manufactured to ASTM A312 and tested with 100% radiographic inspection, welded pipes perform equally to seamless pipes in LNG service.

Q3: How do you protect pipes from chloride corrosion near the sea?
A3: We apply pickling and passivation, and optionally a special anti-chloride coating for extreme coastal conditions.

Q4: Can you supply custom pipe lengths for on-site installation?
A4: Yes, we offer cut-to-length service up to 12 m to match your LNG facility layout and reduce welding joints.

Q5: Do you provide certification for LNG project compliance?
A5: All pipes are delivered with EN 10204 3.2 certificates, including material traceability, mechanical test results, and cryogenic impact reports.