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JIS G3456 Carbon Steel Pipes For High Temperature Service
JIS G3456 standard specifies the carbon steel pipes are mainly used at a temperature over 350℃. The pipe shall be classified into three grades, STPT 370 STPT410 STPT480. Looking forward to your enquiry!
Description
Tianjin Wanlei Steel Pipe Co., Ltd. is one of the leading manufacturers and suppliers of jis g3456 carbon steel pipes for high temperature service in China, featured by quality products and low price. If you're going to wholesale durable jis g3456 carbon steel pipes for high temperature service made in China, welcome to get pricelist and free sample from our factory.
JIS G3456 Carbon Steel Pipes For High Temperature Service
Pipe under JIS G3456 standard is suitable for high temperature with hollow round section. It is often exposed to high temperature and high pressure conditions when used, so it has high lasting strength, high antioxidant and mechanical properties. For example superheated tube of high pressure and ultra-high pressure boilers, gas-guide tube, main steam pipe are made of high temperature seamless steel pipes.
Grade: STPT 370, STPT410, STPT480
The method of manufacture of JIS G3456 carbon steel pipes for high temperature service
The pipe shall be manufactured from coarse-grained killed steel by the seamless or electric resistance welding process. However, the pipe of grade STPT480 shall be manufactured by the seamless process. The pipes by hot-finished shall be heat treatment as per requirement between purchaser and manufacturer. But the pipes by cold-finished must be heat treated for low temperature annealing or normalizing.
Chemical composition and mechanical properties
Grade | C | Si | Mn | P/S | Tensile Strength | Yield Strength | Elongation % |
STPT 370 | ≤0.25 | 0.10-0.35 | 0.30-0.90 | ≤0.035 | ≥370 MPa | ≥215 MPa | 30% |
STPT 410 | ≤0.30 | 0.10-0.35 | 0.30-1.00 | ≤0.035 | ≥410 MPa | ≥245 MPa | 25% |
STPT 480 | ≤0.33 | 0.10-0.35 | 0.30-1.00 | ≤0.035 | ≥480 MPa | ≥275 MPa | 25% |
Pipe end and packing of JIS G3456 carbon steel pipes for high temperature service
End type: plain ends, bevel ends, screw thread, grooved. When the purchaser requires, the end of pipe may be beveled with 30°-0°/+5°. Root face shall be 1.6mm +/- 0.8mm. Otherwise, the end of pipe usually are plain.
Ends packing: plastic caps for OD1/8 to 24in, ends protector for larger size.
Surface of JIS G3456 carbon steel pipes for high temperature service
1. The pipe shall be practically straight, and its both ends shall be at right angles to the axes.
2. The inside and outside surfaces of the pipe shall be well-finished, and free from detrimental defects to use.
3. The body of pipe can be varnished painting, galvanized, anti-corrosion(3LPE, 3PP......).
Dimensional control of seamless steel pipe
All dimensions will be supplied according to standard; In addition, the following tolerances apply:
(a) Pipe body: +/- 0,75%
(b) Length: -0 / +100mm
(c) Wall thickness: +15%, -12,5%
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