Piping Related Abbreviations (W)

WCB is an abbreviation of Wrough Carbon grade B
WCB is covered by ASTM A216 standard, which specification covers carbon steel castings for valves.

WOL is an abbreviation of WeldOLet.
Weldolet® is the most common of all branch connections and is a registered name by Bonney Forge Corporation

WPQ is an abbreviation of Welder Performance Qualification

WPS is an abbreviation of Welding Procedure Specification

WT is an abbreviation of Wall Thickness.
The Wall Thickness in piping terms is defined as schedule (SCH or S) and stands for the wall thickness of pipes, fittings, and some flanges.