Three surface finishes: original / red paint / black paint — FM/UL marked, ASTM A53 SCH40

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FM/UL Fire Protection ERW Steel Pipe

Name: FM/UL Fire Protection ERW Steel Pipe
Brand: Fluid Tech

ERW steel pipe is rolled from cold-formed steel strip or coil and resistance-welded along the seam where the edges meet, without additional welding material. The smooth internal surface improves flow rates for liquid transportation. Available per ASTM/ASME or EN standards.

StandardFM Approved / UL Listed

ASTMASTM A53 / A795 / A135

BS ENBS1387 / EN10255 / EN10224 / EN10217

EndPlain / Beveled / Grooved / Threaded

SurfaceOriginal / Black paint / Galvanized / Red paint

Length5.8m / 6m / Customized

End: Plain / Beveled / Grooved / ThreadedSurface: Original / Black paint / Galvanized / Red paintLength: 5.8m / 6m / Customized

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Fire sprinkler pipe, made for the job

Why fire protection buyers specify FM/UL ERW pipe instead of a general-purpose line.

How ERW steel pipe is made

ERW pipe is rolled from cold-formed steel strip and the edges are resistance-welded along the seam, with no additional welding material. The internal surface comes out smooth, which improves flow in a water line. It is the standard choice for fire sprinkler mains and risers because the size range and end prep match how a fire line is actually installed.

ERW for fire systems: FM and UL marked

A general ERW pipe and a fire-rated ERW pipe can look identical in the yard. The difference is the approval: this pipe carries the FM and UL marks for fire protection service, which is what NFPA 13 installations and insurers expect to see on the branch and main.

Ends and surface finishes

Order ends as plain, beveled, grooved or threaded, and the surface as original, black paint, red paint or galvanized. Red-painted fire pipe is the most common spec for visible sprinkler mains; black pairs with concealed or painted lines.

FAQ

Is this ERW pipe rated for fire service?

Yes — it is FM Approved and UL Listed for fire protection service, to ASTM A53 / A795 / A135 and EN 10255.

What end preparations are available?

Plain, beveled, grooved and threaded ends, so the pipe can feed a threaded fitting, a grooved coupling or a welded/butted connection.

What lengths do you ship?

5.8 m and 6 m are standard; customized lengths are available for specific projects.

ERW steel pipe manufacturer — fire rated, factory direct

What to look for in an ERW steel pipe manufacturer

Most ERW steel pipe manufacturer searches end at the same question: is this a general-purpose line, or is it actually rated for fire service? This pipe carries the FM and UL marks, to ASTM A53 / A795 / A135 and EN 10255, so the approval is part of the spec rather than a footnote added on request.

Factory direct from the Tianjin line

The pipe ships from the factory line in Tianjin, which is how a fire protection ERW pipe order keeps its margin honest. The standard, the size, the end and the surface are confirmed once against the drawing, and the length comes back as 5.8 m, 6 m or a customized cut for the project.

Specified alongside the fittings, not instead of them

A pipe order rarely stands alone. The same scope that calls out ERW steel pipe usually calls out the malleable iron or grooved fittings it will feed, so the pipe and the joints are confirmed as one line before anything ships.

FM/UL Fire Protection ERW Steel Pipe

Fire sprinkler pipe, made for the job

How ERW steel pipe is made

ERW for fire systems: FM and UL marked

Ends and surface finishes

FAQ

ERW steel pipe manufacturer — fire rated, factory direct

From the blog

Buying ERW Fire Protection Pipe: 5 Questions Before You Order

Spec the system. We ship it together.