Industry Standards
- Astm – American Society For Testing And Materials
- Ansi – American National Standards Institute
- Api – American Petroleum Institute
- Mss – Manufacturers Standarization Society Of The Fittings Industry
- Awwa – American Water Works Association
- Ks – Korean Industrial Standards
- Jis – Japanese Industrial Standards
- Bs – British Standard
Flanges
- So – Slipon
- Wn – Weldneck
- Bl – Blind
- Ff – Flat Face
- Rf – Raised Face
- Rtj – Ring-type Joint
Fittings
- Bw – Buttweld
- Smls – Seamless
- Sw – Socketweld
- Npt – National Pipe Thread
- Bspt – Bristish Standard Pipe Thread
Gaskets
- Rf – Raised Face
- Ff – Full Face
- Rtj – Ring Joint Gasket
- Spw – Spirol Wound Gasket
- Ir – Inner Ring
- Or – Outer Ring
- Caf – Asbestos
- Cnaf – Non Asbestos
Valves
- Nrv – Non Return Valve
- Prv – Pressure Reducing Valve