JIS G3454 Carbon Steel Pipes for Pressure Service
JIS G3454 Carbon Steel Pipes for Pressure Service
JIS G3454 is a Japanese industrial standard that specifies carbon steel pipes for pressure service. These pipes are commonly used in high-temperature and high-pressure applications such as boilers, heat exchangers, and piping systems in industrial plants.
| Product Attribute | Description |
| Standard | JIS G3454 |
| Material | Carbon Steel |
| Grades | STPG370, STPG410 |
| Manufacturing Process | Seamless & Welded |
| Outer Diameter (OD) | 10.5mm to 406.4mm (Nominal Bore) |
| Wall Thickness | 2.0mm to 7.9mm (Customized Size) |
| Length | 5m to 12m (Custom lengths available) |
| End Finish | Plain End (PE), Beveled End (BE), Threaded & Coupled (T&C) |
| Surface Finish | Black Paint, Anti-rust Coating, Galvanized |
JIS G3454 Pipe Dimensions
| Nominal size | Outside diameter (mm) | Carbon steel pipes for ordinary piping <SGP> (JIS G3452) | Carbon steel pipes for pressure service <STPG>(JIS G3454) | ||||||
| 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 |
JIS G3454 Equivalent
- ASTM A106 Gr. B (Comparable to STPG370)
- DIN 1629 St 37.0
- EN 10216-1 P235TR1
STPG370 & STPG410 Chemical Composition
| Grade | C (Carbon) | Si (Silicon) | Mn (Manganese) | P (Phosphorus) | S (Sulfur) |
| STPG370 | 0.25 max | 0.10-0.35 | 0.30-1.00 | 0.035 max | 0.035 max |
| STPG410 | 0.30 max | 0.10-0.35 | 0.30-1.20 | 0.035 max | 0.035 max |
STPG370 & STPG410 Mechanical Properties
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
| STPG370 | 370 min | 215 min | 30 min |
| STPG410 | 410 min | 245 min | 25 min |
Standard & Grade
- STPG370 – Comparable to ASTM A106 Grade B, used in general piping applications.
- STPG410 – Higher strength than STPG370, used in more demanding conditions.
Application
- Industrial piping systems
- Boilers and heat exchangers
- Oil & gas refineries
- Power plants
- Chemical processing industries
