JIS G3454 STPG370 ERW Steel Pipe

JIS G3454 STPG 370 is a standard-grade carbon steel pressure pipe specifically designed for dependable performance in high-temperature industrial piping applications.

Key Characteristics:

1.Material Type:Carbon steel

2.Primary Application:Pipes intended for pressure purposes in elevated temperature environments (e.g., steam, hot water, heated fluids).

3.Grade Designation Breakdown:

STP: Stands for "Steel Tube for Pressure service ."

G:Indicates the pipe is intended for use at elevated temperatures ("G" from the Japanese word for high temperature, "Kouon").

370: Specifies the minimum tensile strength of the material, which is 370 MPa (or N/mm²).

Typical Chemical Composition & Mechanical Properties:

Carbon (C): ~0.25% max (ensuring good weldability and formability).

Manganese (Mn): ~0.30-0.90% (contributes to strength).

Phosphorus (P) & Sulfur (S): Low levels (controlled as impurities for better toughness).

Yield Strength: Minimum 215 MPa.

Excellent Weldability: Suitable for common welding methods.

Common Applications:Boiler systems (for steam and hot water lines). Heat exchangers and condensers. Industrial piping systems carrying high-temperature fluids. General service process piping in refineries and chemical plants where temperatures are elevated.

Comparison & Equivalent:

It is functionally similarASTM A106 Grade Bin international/American standards, though the exact chemical and mechanical specifications differ slightly. STPG370 is a reliable, cost-effective choice for medium-temperature pressure piping where high alloy steels are not required.

Supplied Experience

We have supplied JIS G3454 STPG 370 ERW & SMLS pipe to South Korea market since 2021 year

Size:25A *SCH80 40A*SCH80 50A *SCH80 65A *SCH80 350A*9.5MM