POE=Plain one end=一端平口
TOE=Thread one end=一端螺纹
BBE=Bevel both ends=两端坡口
BLE=Bevel large end=大端坡口
BSE=Bevel small end=小端坡口
PBE=Plain both ends=两端平口
PLE=Plain large end=大端平口
PSE=Plain small end=小端平口
PE=Plain end=平口
BE=Beveled end=坡口
BW=Butt welding=对焊
TBE=Thread both ends=两端螺纹
TLE=Thread large end=大端螺纹
TSE=Thread small end=小端螺纹
SW=Socket welding=承插焊
NPT=National pipe thread=美标螺纹