Stainless Steel Welding Neck (WN) Flanges

Stainless Steel Welding Neck (WN) Flanges

Name: Stainless Steel Welding Neck (WN) Flanges
Brand: HuaboPipe

Stainless welding-neck (WN) flanges. ASME B16.5 for covered sizes; larger sizes from drawings, up to DN3000.

Specifications

Type

Welding-neck flange (WN)

Size

ASME B16.5 for covered sizes; larger sizes from drawings, up to DN3000

Facing

RF as usual; FF/RTJ on drawing

Material

304/304L, 316/316L, 310S, 321, 2205, 2507

Standard

ASME B16.5 for covered sizes; large-diameter from drawings

Connection

Butt weld, bore matched to pipe

Inspection

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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A welding-neck (WN) flange is butt-welded to the pipe. The bore is matched to the pipe, which is better for pressure, vibration or temperature cycling. HuaboPipe supplies stainless WN flanges. Standard sizes follow ASME B16.5; larger sizes are made from drawings, up to DN3000.

How to choose

Choose WN for higher pressure, thermal cycling, vibration or welds that will be radiographed. Choose SO when fit-up speed matters and pressure is moderate. The bore must match the pipe; send OD and wall with the inquiry.

FAQ

Maximum WN size?

Up to DN3000. Large sizes are made from drawings.

WN vs SO?

WN is butt-welded and handles stress better. SO is fillet-welded and faster to install. Use WN on critical lines.

What should we send with the inquiry?

Standard/class if applicable, DN, pipe wall, material and facing. If it is not a catalog size, send a drawing.

Can you supply 2205 / 2507?

Yes, to order. Lead time and inspection follow the drawing.