Flanges catalog

Welding Neck Flange

WELDING NECK FLANGE(WN flange) is circumferentially welded into the system at its neck which means that the integrity of the butt welded area can be easily examined by radiography. The bores of both pipe and flange match, which reduces turbulence and erosion inside the pipeline. The weld neck is therefore favoured in critical applications.

Standards: ANSI, MSS, API, AWWA, DIN, JIS, BS and GB.

Pressure classes range: from 150lbs to 2,500lbs.

Sizes range: From 1/2" to 84".

Materials: Carbon steel, stainless steel and alloy steel.

Printing: Carbon steel and alloy steel with yellow print, black print, oil or zinc.

Packing: Plywooden case.

* We can also manufacture special application flanges and forgings that customers require.


Welding Neck Flange Dimensions

ANSI B16.5

Class 150 lbs
Class 300 lbs
Class 400 lbs
Class 600 lbs
Class 900 lbs
Class 1500 lbs
Class 2500 lbs