丝口法兰

Wire flange

WN对焊法兰

WN butt welding flange

S0带颈平焊法兰

S0 with neck flat welding flange

PL平焊法兰

PL flat welding flange

开槽法兰

Slotted flange

碳钢、不锈钢丝口接头

Carbon steel wire mouth joint

BL法兰盖

BL flange cover