Welding symbols and abbreviations

Piping material specifications

Abb. Desciption Abb. Desciption
BE Beveled End BW Butt Weld
CS Carbon Steel Dia Diameter
EFW Electric Fusion Welded ERW Electric Resistance Welded
FF Flat Face Flg. Flange
FS Forged Steel Galv. Galvanized
Gr. Grade Hex. Hexagon
ID Inside Diameter In. Inch
LR Long Radius Max. Maximum
Min. Minimum No. Number
NPS Nominal Pipe Size NPT National Pipe Thread
OD Outside Diameter OS&Y Outside Screw and Yoke
PE Plain End Press. Pressure
Rad. Radius Red. Reducer
RF Raised Face Rtg Rating
RT Radiographic Test RTJ Ring Type Joint
SAW Submerged Arc Weld Sch. Schedule
Scrwd. Screwed SE Screwed Ends
SMLS. Seamless SS Stainless Steel
STD Standard SW Socket Weld
Temp. Temperature Thrd Threaded or Thread
WE Weld End WN Weld Neck
Weld. Welding