JIS G3454 STPG370 Seamless steel pipes
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JIS G3454 Carbon Steel Pipes for Pressure Service
This japanese Industrial Standard specifies the carbon steel pipes, hereinafter referred to as the “pipes”, used for pressure service at an approximate maximunn temperature of 350℃. The pipes for high pressure sevice shall be in accordance with JIS G 3455. Standard: JIS G 3454 JIS G 3455 JIS G 3456 Japanese Industrial Standard Uses: For conveying oil ,gas and other fluid.
JIS G3454 CS Pipe Specification
| Size | 21.3mm to 1219.2mm |
| Wall Thickness | 2-50mm |
| Length | max 12000mm |
| Standard | JIS G3454, JIS G3445, JIS G3452, JIS G3444 |
| Grade | STPG370, STPG410, STKM13A, STKM14A, SGP, STK290, STK400, STK500 |
| Steel grade | STPG 38, STPG 42 |
| Application | Carbon Steel Pipes for Pressure Service |
| Dimension Range | 10.5-660.4 mm |
JIS G3454 Carbon Steel Chemical Composition (%):
| Standard | Grade | C | Si | Mn | P | S |
| JIS G3454 | STPG 370 | ≤0.25 | ≤0.35 | 0.30-0.90 | ≤0.040 | ≤0.040 |
| STPG 410 | ≤0.30 | ≤0.35 | 0.30-1.00 | ≤0.040 | ≤0.040 | |
| JIS G3455 | STS 370 | ≤0.25 | 0.10-0.35 | 0.30-1.10 | ≤0.035 | ≤0.035 |
| STS410 | ≤0.30 | 0.10-0.35 | 0.30-1.40 | ≤0.035 | ≤0.035 | |
| STS480 | ≤0.33 | 0.10-0.35 | 0.30-1.50 | ≤0.035 | ≤0.035 | |
| JIS G3456 | STPT 370 | ≤0.25 | 0.10-0.35 | 0.30-0.90 | ≤0.035 | ≤0.035 |
| STPT 410 | ≤0.30 | 0.10-0.35 | 0.30-1.00 | ≤0.035 | ≤0.035 | |
| STPT 480 | ≤0.33 | 0.10-0.35 | 0.30-1.00 | ≤0.035 | ≤0.035 |
JIS G3454 Carbon Steel Mechanical Properties:
| Standard | Grade | Tensile strength (Mpa) | Yield strength (Mpa) |
| JIS G 3455 | STS 370 | ≥215 | ≥370 |
| STS 410 | ≥245 | ≥410 | |
| STS 480 | ≥275 | ≥480 | |
| JIS G 3456 | STPT 370 | ≥215 | ≥370 |
| STPT 410 | ≥245 | ≥410 | |
| STPT 480 | ≥275 | ≥480 |
JIS Pipe dimension is slightly different from ASTM Pipes
| Nominal size | Outside diameter (mm) |
Carbon steel pipes for ordinary piping <SGP> (JIS G3452) |
Carbon steel pipes for pressure service <STPG>(JIS G3454) |
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| Nominal thickness | |||||||||
| A | B | Thickness (mm) | Sch10 | Sch20 | Sch30 | Sch40 | Sch60 | Sch80 | |
| 6 | 1/8 | 10.5 | 2.0 | – | – | – | 1.7 | 2.2 | 2.4 |
| 8 | 1/4 | 13.8 | 2.3 | – | – | – | 2.2 | 2.4 | 3.0 |
| 10 | 3/8 | 17.3 | 2.3 | – | – | – | 2.3 | 2.8 | 3.2 |
| 15 | 1/2 | 21.7 | 2.8 | – | – | – | 2.8 | 3.2 | 3.7 |
| 20 | 3/4 | 27.2 | 2.8 | – | – | – | 2.9 | 3.4 | 3.9 |
| 25 | 1 | 34.0 | 3.2 | – | – | – | 3.4 | 3.9 | 4.5 |
| 32 | 1.1/4 | 42.7 | 3.5 | – | – | – | 3.6 | 4.5 | 4.9 |
| 40 | 1.1/2 | 48.6 | 3.5 | – | – | – | 3.7 | 4.5 | 5.1 |
| 50 | 2 | 60.5 | 3.8 | – | 3.2 | – | 3.9 | 4.9 | 5.5 |
| 65 | 2.1/2 | 76.3 | 4.2 | – | 4.5 | – | 5.2 | 6.0 | 7.0 |
| 80 | 3 | 89.1 | 4.2 | – | 4.5 | – | 5.5 | 6.6 | 7.6 |
| 90 | 3.1/2 | 101.6 | 4.2 | – | 4.5 | – | 5.7 | 7.0 | 8.1 |
| 100 | 4 | 114.3 | 4.5 | – | 4.9 | – | 6.0 | 7.1 | 8.6 |
| 125 | 5 | 139.8 | 4.5 | – | 5.1 | – | 6.6 | 8.1 | 9.5 |
| 150 | 6 | 165.2 | 5.0 | – | 5.5 | – | 7.1 | 9.3 | 11.0 |
| 200 | 8 | 216.3 | 5.8 | – | 6.4 | 7.0 | 8.2 | 10.3 | 12.7 |
| 250 | 10 | 267.4 | 6.6 | – | 6.4 | 7.8 | 9.3 | 12.7 | 15.1 |
| 300 | 12 | 318.5 | 6.9 | – | 6.4 | 8.4 | 10.3 | 14.3 | 17.4 |
| 350 | 14 | 355.6 | 7.9 | 6.4 | 7.9 | 9.5 | 11.1 | 15.1 | 19.0 |
| 400 | 16 | 406.4 | 7.9 | 6.4 | 7.9 | 9.5 | 12.7 | 16.7 | 21.4 |
Appearance
The JIS G3454 STPG370 Carbon Steel Pipes shall be practically straight, and its both ends shall be at a right angle to its axis.
The inside and outside surfaces of the IS G3454 STPG370 Carbon Steel Pipes shall be well-finished and free form defects that are detrimental to practical use.
Test
Chemical analysis
Tensile Test
Flattening Test
Bending Test
Hydrostatic Test of Nondestructive Examination
