VALVE TERMS AND PIPING SYMBOLS
VALVE & FITTING INDUSTRY ABBREVIATIONS
AFS................American Foundrymen's Society
AGA.............. American Gas Association
ANSI..............American National Std. Institute
ASME........... American Society of Mechanical Engineers
ASTM............ American Society of Testing & Materials
AWWA.......... American Water Works Association
BB................. Bolted Bonnet
BFV.............. Butterfly Valve
BHN............. Brinell Hardness Number
BTU............. British Thermal Unit
BW.............. Butt Weld
BWE............Butt Weld Ends
C................. Celcius Degrees
CxC............ Copper to Copper
CDA........... Copper Development Association
CI................ Cast Iron
Cr 13.......... 13% Chromium Stainless Steel
CSA............ Canadian Standards Association
DD.............. Double Disc
DI................ Ductile Iron
F................. Fahrenheit Degrees
FE.............. Flanged End
FF............... Flat Faced
FM ..............Factory Mutual Laboratories
FOB........... Free On Board
GPM.......... Gallons Per Minute
Hg............. Hydragyrum (Mercury)
HB............ Brinell Hardness
HRC......... Rockwell C Hardness
IBBM....... Iron Body Bronze Mounted
ID............. Inside Diameter
IPS........... Iron Pipe Size
ISNRS................ Inside Screw Non-Rising Stem
ISO...................... International Standards Organization
ISRS................... Inside Screw Rising Stem
MSS................... Manufacturers Standardization Society
MTR................... Material Test Report
NPT................... National Pipe Taper (Pipe Thread)
NSR................... Non-Rising Stem
OD...................... Outside Diameter
OS&Y................. Outside Screw and Yoke
PN....................... Pressure Nominal (Metric)
PSI...................... Pounds Per Square Inch
PSIA................... Pounds Per Square Inch Absolute
PSIG................... Pounds Per Square Inch Gage
P–T..................... Pressure – Temperature
Rc....................... Rockwell "C"
RF....................... Raised Face
RPM.................... Revolutions Per Minute
RS........................ Rising Stem
SB....................... Screw-In-Bonnet
SE....................... Screwed Ends
SJ........................ Solder Joint
SS....................... Stainless Steel
STD.................... Standard
SWP................... Steam Working Pressure
TRIM.................. Certain Valve Parts – Stems, Seats, Etc.
UB....................... Union Bonnet
UL........................ Underwriter's Laboratories
WOG.................... Working Pressure: Water, Oil and Gas
WSP.................... Working Steam Pressure
WWP................... Water Working Pressure
