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Steel pipe for gas cylinder

 


Gas cylinder steel pipe is used in manufacturing seamless steel gas cylinders, automotive CNG cylinders and composite cylinders. It provides excellent hot rolled thin-walled seamless steel pipe for tube-type bottle. This high-pressure gas cylinder pipe has such features: quality inside and outside surface; uniform wall thickness; light mass; high productivity and yield and low cost, etc.

Implement specifications GB 18248, GB28884 and JIS 3429. Products are used for the manufacture of firefighting gas cylinder, industrial gas cylinder and vehicle-borne gas cylinder. Products can be ordered in accordance with the client’s requirements. It has been applied in seamless tube-type bottle bottom closing in key technology, adopting the gas cylinder pipe manufacture from punching drawing billet to thin-walled seamless steel pipe production. And this change is welcomed by users and has been an trend.

UsageSpecification No.Steel Grade
Seamless Steel Pipe used for Gas CylinderGB /T1824837Mn, 34CrMo4, 35CrMo,
30CrMnSiA, 30CrMo
Fire-fighting gas cylinders, industrial gas cylinders, vehicle gas cylindersJIS G342937Mn, 34Mn2V, 30CrMo, 35CrMo, STH11, STH12, STH21, STH22, or anything else
Seamless Steel Pipe used for Gas Cylinder with Large VolumeGB/T2888430CrMoE（4130X）, 32CrMoE（4142）

Products can be ordered in accordance with the client’s requirements.

30CrMoE seamless tubes are used for manufacturing seamless steel tubes for gas cylinders with a capacity of 300L~3 000L.

Chemical Component of 30CrMoE:

Grade　CSiMnPSCrMoNiCu
30CrMoE10.25-0.350.15-0.350.4-0.9≤0.02≤0.010.8-1.10.15-0.25≤0.3≤0.2
20.26-0.340.17-0.370.4-0.7≤0.02≤0.010.8-1.10.15-0.25≤0.3≤0.2

*30CrMoE 1 is equal to 4130X.

Mechanical property of 30CrMoE:

30CrMoET.S/MPaY.S/MPaE/A %Yield RatioHardness/HBW-40℃ Impact Test/J
≥720≥485≥20≤86≤269≥32

NDT: UT 100%.

JIS G3429 Seamless tubes for high pressure gas cylinder

Chemical Component of JIS G3429:

GradeCSiMnPSNiCrMo
STH11≤0.500.10-0.35≤1.80≤0.035≤0.035///
STH120.30-0.410.10-0.351.35-1.70≤0.030≤0.030///
STH210.25-0.350.15-0.350.40-0.90≤0.030≤0.030≤0.250.80-1.200.15-0.30
STH220.33-0.380.15-0.350.40-0.90≤0.030≤0.030≤0.250.80-1.200.15-0.30


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