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Malleable Iron Pipe Fittings Supplier for Fire Systems

Name: Malleable Iron Pipe Fittings
Brand: Fluid Tech
SKU: MIF-DN15-DN100
Availability: InStock

As a factory-direct malleable iron pipe fittings manufacturer, we supply wholesale fire sprinkler fittings to your spec: BS EN 10242 / DIN in black and galvanized, cast with the FM and UL marks for fire service. Custom thread standards, BSPT or NPT, are confirmed on the quotation, and bulk orders ship with OEM marking and your carton.

FM & UL markedBS EN 10242 / DINBlack finishGalvanized finish

90° Elbow

Fig 90 · BS EN 10242 / DIN

90° Street Elbow

Fig 92 · BS EN 10242 / DIN

45° Elbow

Fig 120 · BS EN 10242 / DIN

Female Threaded Tee

Fig 130 · BS EN 10242 / DIN

Equal Tee

Fig 130 · BS EN 10242 / DIN

90° Reducing Elbow

Fig 90R · BS EN 10242 / DIN

Part Thread Socket

Fig 220 · BS EN 10242 / DIN

Reducing Socket

Fig 240 · BS EN 10242 / DIN

M&F Reducing Socket

Fig 246 · BS EN 10242 / DIN

Coupling

Fig 220 · BS EN 10242 / DIN

Straight Cross

Fig 180 · BS EN 10242 / DIN

Y-Tee (Wye Tee)

Fig 165 · BS EN 10242 / DIN

About malleable iron pipe fittings

What a fire sprinkler spec actually requires from a malleable iron fitting, and how ours are made.

What is malleable iron?

Malleable iron starts as a brittle casting and is then annealed at high temperature so the internal structure turns into a tough, ductile form. The result is a fitting that takes torque during assembly without cracking, and holds pressure over a long service life. Our data sheet lists a working pressure range of 1.6 to 2.5 MPa and a working temperature range of -20 to 200 degrees C, with tensile strength above 330 MPa.

Sizes: DN15 to DN100

The standard range runs from DN15 (1/2 inch) up to DN100 (4 inch), which covers the full diameter run of a typical fire sprinkler branch line down to the sprinkler outlet. Every size is available in the figure styles shown above, so a branch, tee, coupling or elbow all come from one casting standard.

Black vs galvanized finish

Black finish is the traditional look of a fire system and pairs with black-painted fire pipe. Galvanized adds a zinc layer for extra corrosion resistance where the line sits in a damp or exposed location. Specify the finish per line in your bill of materials and we will match it fitting for fitting.

Thread standards: BS EN 10242 / BSPT and NPT

These malleable iron fittings are produced to BS EN 10242 (BSPT) and DIN, with the US-range equivalents built to ASTM A197 (NPT) per our technical documentation. Thread form and pitch are not interchangeable between the two systems, so match the thread standard to the rest of the line. See our BSPT vs NPT guide for the geometry.

FAQ

Are these malleable iron fittings rated for fire service?

Yes. They are cast with the FM and UL marks for fire protection service, to BS EN 10242 / DIN, with a working pressure of 1.6 to 2.5 MPa.

Which thread standard should I specify?

Match the thread standard to your pipe and the rest of the system. Ours cover BS EN 10242 (BSPT) and DIN, plus the US-range NPT equivalents. Cross-mating BSPT and NPT does not seal.

What sizes are available?

DN15 (1/2 inch) to DN100 (4 inch) across the full figure range, in black or galvanized finish.

What is the MOQ and do you offer wholesale pricing?

Wholesale orders start from carton quantities per figure, and the price steps down as the mix fills toward a full carton or container. A mixed carton of the common elbows, tees and couplings is usually the cheapest way to start a resale line. Ask for the wholesale price list and the size-to-carton map with your first inquiry.

Can the fittings be made with our own brand or logo?

Yes. OEM marking on the body, private-label cartons and the certificate copy per container are available on bulk orders. The marking and the carton artwork are confirmed on the quotation before production, so the first shipment already carries your brand.

Spec guide: choosing a malleable iron fittings supplier

The material, the thread and the mark are where a fire line stands or falls. Compare the options, find your buying situation, and check the order before it goes to production.

Option	Good for	Where it fails
Black malleable iron, BSPT	Fire lines with black-painted pipe; UK, Middle East and Asia specs where BSPT is the local standard	Not for US-spec projects that call out NPT — cross-mating BSPT and NPT does not seal
Galvanized, BSPT	Damp or exposed runs where the zinc layer adds corrosion margin	Not required on a clean indoor branch line; adds cost without benefit
Black malleable iron, NPT (ASTM A197)	US and Americas projects where the thread standard is NPT	Not for BSPT systems; the taper and pitch differ

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 a full DN15–DN100 range for resale

You buy across the size range, want the full figure styles in one order, and need consistent marks and packaging per SKU. Ask for the carton quantities and the per-figure price break before you commit.

Contractor / installer

Ordering against a project BOM

You buy to a drawing, want the thread standard and finish matched line by line, and cannot absorb a mis-shipped size on site. Send the bill of materials and the quote comes back spec-checked.

Importer / brand

Private label and bulk allocation

You import under your own brand or a project brand, and care about the marking, the carton and the document set more than the catalogue story. Ask about OEM marking and the certificate copy per container.

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.

Thread standardBSPT (BS EN 10242 / DIN) or NPT (ASTM A197) — stated on every line, not just the drawing title.
Fire marksFM / UL on the data sheet and on the quote; certificate copy ships with the goods.
Pressure range1.6 to 2.5 MPa working pressure, confirmed against the system design.
FinishBlack or galvanized, matched to the pipe finish on the same BOM line.
Size runDN15 to DN100, every figure style you actually need in the order.
InspectionThird-party inspection (SGS) available per batch; report ships with the docs.

Request a quote →

Malleable iron fittings supplier — factory direct, wholesale ready

01

Factory direct from Tianjin

The castings come from partner foundries that Fluid Tech has worked with since 2018, so you are buying from the factory side, not a reseller layer on top. Pricing reflects that, and the spec, the certification and the delivery date sit with one supplier instead of being passed between three.

02

What to check with a malleable iron fittings manufacturer

Buyers who search for a malleable iron pipe fittings manufacturer are usually checking four things before they send an RFQ: the fire marks (FM and UL, per our data sheets), the pressure range (1.6 to 2.5 MPa), the thread standard (BS EN 10242 / BSPT or the NPT range), and the size run (DN15 to DN100). All four are on this page, and the same four will be on the quote.

03

Wholesale and bulk allocation

Wholesale buyers and project buyers both work from the same warehouse stock: a full sprinkler system order and a single replacement line both ship from the northern logistics center. Bulk orders can carry OEM marking and private-label cartons, and the fittings ship with the pipe and the hangers when you send the scope as one bill of materials, which is how a branch line stops arriving with a missing tee in it.

From the blog

Selection guides and field notes on fire protection pipe, fittings and supports.

2026-09-23