One-stop fire protection supply · Tianjin, China · est. 2018
FM / UL / CE / LPCB / VDS
FM/UL Fire Protection ERW Steel Pipe Manufacturer
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 Manufacturer

As a factory-direct ERW steel pipe manufacturer, we supply wholesale FM/UL fire protection ERW pipe, rolled from cold-formed steel strip and resistance-welded along the seam without additional welding material. The smooth internal surface improves flow, and custom ends, finishes and project branding are confirmed on the quotation.

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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Seamless Steel PipeASTM A106 / A53Malleable Iron FittingsBS EN 10242Pipe HangersFM / UL

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.

What are the wholesale and MOQ terms?

Wholesale orders start from 1 ton per size, and a mixed-size order toward a full container gets the better per-ton price. Distributors usually open with the common main and branch sizes; the size-to-container map on the quotation shows where the price break lands. Samples are available on request, freight collect.

Can the pipe carry our own brand or project marking?

Yes. On a bulk order the ERW pipe can ship under your brand or a project brand, with OEM marking on the banding and the FM/UL certificate set included in your name. The marking is confirmed on the quotation before production.

Spec guide: buying FM/UL ERW fire protection pipe

The fire mark is the line between a pipe and a fire pipe. Compare the finish and end options, find your buying situation, and check the order before it goes to production.

OptionGood forWhere it fails
Red painted, groovedVisible sprinkler mains; grooved joints without field threadingNot for lines specified threaded or black
Black, threadedConcealed or painted lines with threaded malleable iron fittingsNot the standard visible-main look in most markets
Galvanized, plain endDamp or exposed service; cut and coupled on siteCosts more than black or painted for indoor runs

Which buyer are you?

Three common ways people buy this line. Pick your lane and the quote comes back with the right questions already answered.

Distributor

Stocking fire-rated ERW across sizes

You carry fire pipe in volume and want the FM/UL marks, consistent ends and the mill cert in the file before the container lands. Ask about the size-to-container map.

Contractor / installer

Ordering to the fire line drawing

You buy the pipe against a BOM and need the ends to match the couplings or fittings on the same line. Send the four spec fields and the quote comes back matched.

Importer / brand

Fire-rated pipe under a project brand

You import for a project or brand and need the FM/UL marks and the cert set to travel with the shipment. Ask about marking and the document package.

Before you approve production

Six things to check on the quotation, the sample or the pre-shipment report. Hand this list to whoever approves the order.

  • StandardASTM A53 / A795 / A135, with EN equivalents — stated per line.
  • Size & wallNominal size and schedule per the drawing, confirmed against OD and wall.
  • EndPlain, beveled, grooved or threaded, matched to the joint type.
  • SurfaceOriginal, black, red or galvanized.
  • Length5.8 m, 6 m or customized per project.
  • InspectionMill cert included; SGS third-party inspection available per batch.
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ERW steel pipe manufacturer — fire rated, factory direct

01
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.

02
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.

03
Wholesale pipe, specified alongside the fittings

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. Wholesale buyers get the same spec discipline with carton or per-ton pricing and OEM marking on the bulk allocation.

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Spec the system. We ship it together.

Send your bill of materials or drawing — we confirm spec, cert and lead time, then ship the full package.

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