Stainless Steel Lap Joint Flanges

Name: Stainless Steel Lap Joint Flanges
Brand: HuaboPipe

On the English site this URL is titled Lap Joint Flange: a loose backing flange used with a stub end so the flange can rotate for bolt holes.

Specifications

Type

Lap-joint flange (backing flange), used with stub end

Size

Covered sizes to ASME B16.5; others from drawings, up to DN3000 class

Facing

Matches the stub-end face; RF common

Material

304/304L, 316/316L, 310S, 321, 2205, 2507; flange and stub end can differ if specified

Standard

ASME B16.5 for covered sizes; non-standard from drawings

Connection

Loose on the stub end; bolts to the mating flange

Inspection & delivery

MTR available; hydrotest/NDT and lead time per order

Non-standard / OEM Customization Available

We support custom manufacturing based on your drawings and samples (NPS, Material, Thickness).

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On the English site this URL is titled Lap Joint Flange: a loose backing flange used with a stub end so the flange can rotate for bolt holes. The Chinese page at the same slug is titled socket-weld (SW). This English page describes lap-joint flanges. HuaboPipe supplies them to order, usually with a matching stub end.

How to choose

Use lap-joint + stub end when joints are opened often or bolt holes must rotate. Order the stub end with the flange. Do not treat this page as a socket-weld flange.

FAQ

Do we need a stub end?

Yes. A lap-joint flange is incomplete without the matching stub end.

Maximum size?

Covered B16.5 sizes, plus larger sizes from drawings up to about DN3000.

Same as socket weld?

No. Socket weld inserts the pipe. Lap joint is a loose flange on a stub end.

Non-standard?

Yes. Send a drawing. We reply within 24 hours.