What Are the MS ERW Pipe Specifications for Fire Lines
2026-08-28
What Are the MS ERW Pipe Specifications for Fire Lines
MS ERW Pipe Specifications for Fire Lines
MS ERW fire line pipes are mild steel pipes manufactured through electric resistance welding (ERW) and widely used in fire sprinkler, hydrant, and other fire protection systems. When choosing an ERW pipe for fire fighting, buyers should consider pipe size, wall thickness, material grade, applicable standards, pressure requirements, surface treatment, and connection type.
What Standards Are Used for MS ERW Fire Fighting Pipes?
Different markets may require different standards for fire protection piping. Common standards include:
- ASTM A53: Covers seamless and ERW carbon steel pipe, with Grade B commonly used in fire protection applications.
- ASTM A795: Specifically covers black and hot-dipped galvanized steel pipe for fire protection systems.
- EN 10255: Covers non-alloy steel tubes suitable for welding and threading, commonly including S195T.
- IS 1239: Commonly used in India for mild steel pipes in water and gas applications.
- IS 3589: Mainly applies to larger-diameter steel pipes for water and sewage systems.
The required standard should be confirmed according to the project specification and local fire protection regulations.
What Are the Common Sizes and Wall Thicknesses?
Pipe dimensions depend on system design, water flow, pressure, and pipe location. For ASTM A53 Grade B ERW pipe, common sizes include NPS 1 to 6 inches.
ASTM A795 fire fighting pipe is commonly specified with different Schedule classifications:
- SCH 10: Thin-wall and lightweight, commonly used for sprinkler branch lines.
- SCH 40: Standard wall thickness, widely used for fire risers and main fire lines.
- SCH 80: Heavy-wall pipe, suitable for higher-pressure applications.
EN 10255 pipes are also available in Medium and Heavy wall thickness series. The final wall thickness should be selected based on pressure, pipe diameter, connection method, and project requirements.
