JIS G3454 STPG370 carbon steel pipe is a steel pipe produced according to the Japanese national standard JIS G3454, mainly used for pressure pipes used below 350℃.
GNEE supplies JIS G3454 STPG370 carbon steel round pipes including a variety of outer diameters and wall thicknesses, such as 15mm, 20mm, 25mm, etc., with wall thickness ranging from SCH 20 to SCH 80.
JIS G3454 STPG370 seamless steel pipe is widely used in pipeline systems that need to withstand pressure and the working environment temperature does not exceed 350℃, such as pressure pipes in the petroleum, chemical, natural gas, pharmaceutical, food and other industries.
Chemical Composition of JIS G3454 STPG 370 steel pipe
| Letter symbol of grade | Chemical Composition % | ||||
| C | Si | Mn | P | S | |
| STPG 370 | 0.25 max. | 0.35 max. | 0.30 ~0.90 | 0.040 max. | 0.040 max. |
Mechanical Properties of JIS G3454 STPG 370 carbon pipe
| Letter symbol of grade |
Mechanical Properties | |||||
| Tensile strength | Yield strength | Elongation % | ||||
| kgf/m㎡ {N/ m㎡} | kgf/m㎡ {N/ m㎡} | No.11 and No.12 test pieces | No. 5 test pieces | No. 4 test piece | ||
| Longitudinal | Transverse | Longitudinal | Transverse | |||
| STPG 370 | 38 {373}min | 22{216} min | 30 min | 25 min | 23 min | 28 min |
Carbon thick wall steel pipe JIS G3454 STPG 370
The dimensions shall be expressed as follows.
Nominal diameter × Nominal wall thickness
Example: 50A × Sch 40, 2 B × Sch 40
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Transportation inspection
Each pipe that passes the inspection shall be marked with the following items. However, smaller pipes or other pipes specified by the buyer may be bundled together by marking each bundle in an appropriate manner. In both cases, the order in which marked items are arranged is not specified.
(1) Grade letter symbol (STPG 370)
(2) Alphabetical symbols indicating manufacturing processes
(3) Overall dimensions
(4) Manufacturer's name or its identifying brand
(5) The letter symbol Z indicating supplementary quality requirements
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