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Pipe Fittings, Flanges & Hose Assemblies

Fittings split into three belts with different strengths: Mengcun for carbon-steel elbows/tees/reducers and flanges to ASME or DIN, Wenzhou for stainless sanitary and instrumentation tube fittings, Yuhuan for small brass and plated utility fittings. Mixing them in one container is normal; the specification risk is standard-confusion (e.g. SCH20 vs SCH40, PN vs Class 150).

Industrial belt

Cangzhou / Mengcun (Hebei) for steel butt-weld fittings and flanges; Wenzhou (Zhejiang) for stainless sanitary tube fittings; Yuhuan (Zhejiang) for brass and mixed-material fittings

Typical products

Butt-weld elbow / tee / reducerForged fittingSlip-on / weld-neck flangeStainless sanitary fitting & ferruleHose clamp / camlock couplingHydraulic bite-type fitting

Materials

ASTM A234 WPB / WPCA105 / A350 LF2 forgingsSS 304 / 316 / 316L / 2205Brass HPb59-1

Surface finishes

Black / phosphateHot-dip galvanisedPickled & passivatedPolished Ra ≤ 0.8 (sanitary)

Standards you will quote against

ASME B16.9 / B16.5 / B16.11DIN 2605 / EN 1092-1GB/T 124593-A / EHEDG for sanitary (where claimed)

Specification reference

Attribute	What to specify
Size range	DN15–DN600 butt-weld; 1/2"–4" forged; DN10–DN1200 flanges
Schedule	SCH20 / SCH40 / STD / XS / SCH80 / XXS (declare the mapping)
Facing	RF, FF, RTJ, tongue-and-groove
Bolt circle	Per EN 1092-1 or ASME B16.5 — never mix
Wall tolerance	±12.5% on nominal per B16.9 for most sizes
Marking	Heat number, standard, material grade, size stamped on each piece
MTR	Mill test report EN 10204 3.1 on request

Typical MOQ: Standard sizes 1–5 tonnes per item; flanges typically 50–200 pcs per size; custom castings 300–500 pcs. Typical lead time: 20–40 days for standard items; galvanising or machining adds 7–15 days.

Factories listed in this category

No factory page is published in this category yet. The specification table above is already usable for quotation; factory pages are added under this category URL as they are onboarded.

Questions buyers ask

Can I combine carbon-steel fittings and stainless sanitary fittings in one shipment?

Yes, buyers routinely consolidate Mengcun carbon-steel goods with Wenzhou stainless goods through one consolidator. Keep them on separate packing lists and declare materials per line, and avoid storing stainless against hot-dip galvanised parts during sea freight to prevent contact corrosion.

What does PN16 correspond to in ASME classes?

PN ratings and Class ratings are not one-to-one; the mapping depends on temperature. A PN16 EN flange and a Class 150 ASME flange often share bolt holes only approximately, so request the drilling drawing when replacing across standard systems rather than assuming equivalence.