ansi b16.5 rasied face weld neck flange

A weld neck flange (WN flange) seems like a flange has a neck for weld with the pipe.it is easily to recognized by their neck.The weld neck flange is connected with the pipe from the neck in butt welding method, that means the neck should be have same material and same outer diameter and wall thickness with the pipe. 

Welding Neck Flange Size:1/2"~48"
pressure class:150 300 400 600 900 1500 and 2500  pn: 6 10 16 64 and 160,5K-40K
Welding Neck Flange material
CS (carbon steel): 20#,20G,Q235B
AS (alloy steel):Q345(16Mn),12CrMoV,15CrMo,09MnNiD
SS (stainless steel):304,304L,316,316L,312,202,317
SA105M,SA234-WPB
Face type

RF(raised face)    M(male face)
FM(female face)      T(tongue face)
G(groove face)       RJ(ring joint face)etc.

Production pictures of Welding Neck Flange

Production process of Welding Neck Flange

Package pictures of Welding Neck Flange