Glossary

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