ASTM A795 / A795M —— Standard Specification for Black and Hot-Dipped Zinc-Coated (Galvanized) Welded and Seamless Steel Pipe for Fire Protection Use
This specification covers black and hot-dipped zinc-coated (galvanized) welded and seamless steel pipe for fire protection use. The pipe may be bent, but it is not intended for bending made at ambient temperature wherein the inside diameter of the bend is less than twelve times the outside diameter of the pipe being bent. The steel shall conform to the required chemical composition. Each length of pipe shall be subjected to a hydrostatic test without leakage through the pipe wall. As an alternative to the hydrostatic test, and when accepted by the purchaser, each pipe shall be tested with a non-destructive electrical method. Finally, flattening test shall be performed on the pipe in accordance with, electric-resistance-welded pipe, and furnace-welded pipe.
ERW steel pipe is formed by rolling strip and welding the seam, with tighter dimensional tolerances and less weight. The weld seam is heat treated after welding that no untempered martensite remains, and the weld flash can be removed from both inner and outer surfaces.
ASTM A795 ERW steel pipe is a specific type of pipe that conforms to the ASTM A795 standard, which is commonly used in water-based fire protection systems for water distribution or trim applications, such as wet, dry, pre-action or deluge sprinkler systems.
Specification of ASTM A795 ERW Steel Pipe:
Certificate: UL certified/FM certified
Standard: ASTM A795 Grade B, Type E
Length: 6m/5.8m/11.8m/12m, customized
Ends: Plain (square cut) / beveled to 30°/ roll groove per AWWA C606 / NPT thread per ANSI B1.20.1 / BSPT per ISO 7-1
Surface: red paint/red epoxy resin or polyester/hot-dip galvanizing/black paint, etc.
Chemical Compositions (%) and Mechanical Properties of ASTM A795 ERW Steel Pipe:
|
C |
Mn |
P |
S |
Si |
Cu |
Cr |
Mo |
V |
|
≤0.30 |
≤1.20 |
≤0.35 |
≤0.35 |
- |
- |
- |
- |
- |
|
Tensile Strength / psi (MPa) |
Yield Strength / psi (MPa) |
Longitudinal Elongation(%) |
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|
≥60000（415） |
≥35000（240） |
≥19 |
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When using ASTM A795 ERW steel pipes in fire protection applications, it is essential to follow the relevant building and fire codes, including those set by organizations like the National Fire Protection Association (NFPA) and local authorities. These codes stipulate specific installation and testing requirements for fire protection systems. It is also crucial to work with reputable suppliers and manufacturers to ensure that the pipes meet the necessary standards and performance expectations for your specific application.
