JIS G3429 Seamless Steel Tubing For Gas Cylinder
JIS G3429 seamless steel tubing for gas cylinder
JIS G3429, specification for seamless steel tube for High pressure gas vessel or container. It covers 5 grades of seamless gas pipe for high pressure purpose.
Grade: STH11, STH12, STH21, STH22
Outer Dimensions: 19.05mm ~ 114.3mm
Wall Thickness:2.0mm ~ 14 mm
Length: max 16000mm
Application:High pressure gas cylinder with excellent crush resistance, original tube for liquefied gas container.
| Classification | Symbol of |
| Mn steel pipe | STH 11, STH12 |
| Cr-Mo steel tube | STH21, STH22 |
| Ni-Cr-Mo steel tubing | STH 31 |
JIS G3429 tubing Chemical composition:( %)
| Grade | C | Si | Mn | P | S | Ni | Cr | Mo |
| STH11 | ≤0.50 | 0.10-0.35 | ≤1.80 | ≤0.035 | ≤0.035 | / | / | / |
| STH12 | 0.30-0.41 | 0.10-0.35 | 1.35-1.70 | ≤0.030 | ≤0.030 | / | / | / |
| STH21 | 0.25-0.35 | 0.15-0.35 | 0.40-0.90 | ≤0.030 | ≤0.030 | ≤0.25 | 0.8-1.2 | 0.15-0.30 |
| STH22 | 0.33-0.38 | 0.15-0.35 | 0.40-0.90 | ≤0.030 | ≤0.030 | ≤0.25 | 0.8-1.2 | 0.15-0.30 |
| STH31 | 0.35-0.40 | 0.10-0.50 | 1.20-1.50 | ≤0.030 | ≤0.030 | 0.5-1.0 | 0.3-0.6 | 0.15-0.25 |
JIS G3429 pipe tolerances:
| Outside diameter | Wall thickness | Length | Wall thickness disparity |
| 1% | +30% | >+30mm | Within 20% of the nominal wall thickness |
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FAQ:
Q: Are you trading company or manufacturer?
A: We are a professional steel pipes materials manufacturer.
Q: How long is your delivery time?
A: Generally it takes 7-14 days if the goods are in stock or 30-60 days if there is no stock, this mainly depends on quantity.
Q: Do you provide free sampleas?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment?
A: Payment<=1000USD, 100% in advance. Payment>=1000USD, 30% T/T in advance ,balance before shippment.
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