JIS G3429 is a Japanese national standard specifically for seamless steel pipes for high-pressure gas containers. The implementation standard of this steel pipe is JIS G3429-2017, and its main purpose is to manufacture seamless steel pipes for high-pressure containers. This standard covers a variety of steel pipe grades, including STH11, STH12, STH21, STH22, STH31, etc. The chemical composition of these steel pipes also meets specific requirements to ensure that they are suitable for the manufacture of high-pressure gas containers.
Products Data
JIS G3429 High Pressure Gas Cylinder Tube Chemical Composition:
| Class | C | Si | Mn | P | S | Ni | Cr | Mo |
|---|---|---|---|---|---|---|---|---|
| STH11 | 0.50 max | 0.10~0.35 | 1.80 max | 0.035max | 0.035max | - | - | - |
| STH12 | 0.30~0.41 | 0.10~0.35 | 1.35~1.70 | 0.030max | 0.030max | - | - | - |
|
STH21 |
0.25~0.35 |
0.15~0.35 |
0.40~0.90 |
0.030max |
0.030max |
0.25 max |
0.80~1.20 |
0.15~0.30 |
|
STH22 |
0.33~0.38 |
0.15~0.35 |
0.40~0.90 |
0.030max |
0.030max |
0.25 max |
0.80~1.20 |
0.15~0.30 |
| STH31 | 0.35~0.40 | 0.10~0.50 | 1.20~1.50 | 0.030max | 0.030max | 0.50~1.00 | 0.30~0.60 | 0.15~0.25 |
Tolerances of JIS G3429Seamless Steel Tubes
| Tolerance | Data |
| Outside diameter: | 0.01 |
| Wall thickness: | 0.3 |
| Wall thickness disparity: | Within 20% of the nominal wall thickness |
| Length: | >+30mm |
Products display
JIS G3429 Seamless Steel Tubing For Gas Cylinder
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GNEE mainly produces and deals in carbon steel pipes and alloy steel pipes. Our pipes include liquid conveying pipes, structural pipes, hydraulic support pipes, boiler pipes and bearing pipes. We usually have more than 5,000 tons of pipes in various sizes and standards. Our stock pipe sizes range from 20mm to 406mm outer diameter and 2mm to 70mm wall thickness.
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