MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations
Definition
ABS
Acrylonitrile Butadiene Styrene Automatic buttweld Adaptor Air Conditioning Refrigeration Tubing Adjustable Acid exhaust Above Finished Floor (reference to dimensions) Aluminum Argon Arsine Analyzer Transmitter Automatic Temperature Control Atmospheric Vent Acid Vent Acid Waste Acid waste neutralization Air, Water and Gas American Welding Society American Water Works Association Bell & Spigot Diborane Balance Bead and Crevice Free Boron Trichloride Blow Down Beveled End Butterfly Boron Trifluoride Back Flow Preventer Bottom of duct Back Pressure Bronze British Thermal Unit Bushing Buttweld Cup Halocarbon 116 -- hexafluoroethane Halocarbon 134a -- 1,1,1,2-tetrafluoroethane Halocarbon 125 -- pentafluoroethane Halocarbon 218 -- perfluoropropane Halocarbon c-318 -- octafluorocyclobutane Compressed Air
MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations
Definition
CDA CEX CF4 CFM
Clean Dry Air Corrosive Exhaust Halocarbon 14 -- Tetrafluoromethane Cubic Feet Per Minute Halocarbon 32 -- Difluoromethane Halocarbon 41 -- Methyl Fluoride Methane Halocarbon 23 -- Trifluoromethane Cast Iron Clean in Place Check Class Chlorinated Water Chlorine Gas Control Carbon Monoxide Clean-Out Carbon Dioxide Coaxial Double Contained Tubing Combination Compression Concentric Connection Corporation Corrugated Coupling Chlorinated Poly Vinyl Chloride Cryogenic Clean Steam (white steam) Carbon Steel Center Chemical Valve Manifold Box Cold Water Double Diesel Fuel Drinking Fountain Double Hub Deionized Ductile Iron Deionized Water Diameter Inch Diaphragm
CH2F2 CH3F CH4 CHF3 CI CIP CK Cl. CL CL2 Cntrl. CO CO CO2 COAX Combo. Comp. Conc. Conn. Corp. Corrug. Coup. CPVC CRYO CS CS Ctr. CVMB CW Dbl. DF DF DH DI DI DI WTR Dia. Diaphr.
MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations
Definition
GMAW
Gas Metal Arc Welding Good Manufacturing Practices Gallons Per Minute Grooved Gasket Grease Trap Gas Tungsten Arc Welding Gasoline Vent Hydrogen Sulfuric acid Hydrogen bromide Hydrogen chloride or hydrochloric acid if liquid Helium Heat exhaust Hexagon Hydrofluoric acid Gas-High Pressure House Nitrogen (usually coming off of bulk storage tanks) Handle Horizontal Horse Power High Purity Ultra High Purity High purity nitrogen (usually bottle gas dedicated to service) House Vacuum Heating Ventilating and Air Conditioning Hot Water Hot Water Recalculating Heat Exchanger Hydraulic Invert Elevation Instrument air Iron Body Bronze Mounted Industrial Cold Water Industrial Hot Water Inside Diameter Industrial Hot Water Inch Increaser Indicator Invert (Isopropyl alcohol) Solvent used in cleaning piping
GMP GPM Grvd. Gskt. GT GTAW GV H2 H2SO4 HBR HCL HE HEX Hex. HF HG HN2 Hndl. Horiz. HP HP UHP HPN2 HV HVAC HW HWR HX Hyd. IE IA IBBM ICW IHW ID IHW in. Incr. Indic. Inv. IPA
MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations
Definition
NLG NO NO NPT NPW NRS
Non-Leaded Gasoline Nitric Oxide Normally Open National Pipe Thread Non Potable Water Non Rising Stem Oxygen Outside Diameter Oil Free Air Operator or Operated Welding with Orbital Welding Machine Orifice Outside Screw & Yoke Oxygen Process Cooling Water Pumped Discharge Line Plain End Cross-Linked Polyethylene Type of fluoropolymer tubing and fittings for a wide range of uses Fluoropolymer tubing and fittings for a wide range of uses. Many Options available for different processes Premium Gasoline Phosphine Pressure Indicator Used to clean interior surface of piping, by blowing a saturated IPA nonparticulate paper through the inside of tubing. Repeat process until WAD comes out clean Pressure Indicating Transmitter Post Indicator Valve Push Joint Pure Nitrogen (usually bottle gas dedicated to service) High Purity Nitrogen (usually bottle gas dedicated to service) Pneumatic Positive Pressure Relief & Temperature Relief Valve Pressure Pressure Relief or Reducing Valve Pounds Per Square Inch Pressure Transmitter Type of fluoropolymer tubing and fittings for a wide range of uses
O2 OD OFA Oper. OW Orif. OS&Y OX PCW PD PE PEX PFA PFA / PTFE / FEP PG PH3 PI PIG / WAD
MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations
Definition
SST
Stainless steel / stainless steel tubing. Usually 304l or 316l grade stainless Sub-Soil Drain, Footing Drain Storm Street Standard Weight Steam Strainer Suction Surgical Vacuum Service Weight Soft Water Solvent waste Socket Weld Thermometer Threaded & Coupled Temperature Element Tempered Hot Water Tempered Hot Water, Recirculation Process Equipment / Tool Gas Panel Threaded Thread O Let Trap Primer Traverse Trap Temperature Relief Valve Temperature Transmitter Thermal Well Thermal Expansion Typical Ultra high purity Utility nitrogen (usually coming off of bulk storage tanks) Utility or house nitrogen usually coming off of bulk storage tanks Ultra pure water Urinal Utility Vacuum Vacuum Vent Variable Air Volume Mechanical joining method Vertical Vibration
SSD ST St. Std Wt Stm. Strnr. Suct. SV SV SW SW SW T T&C TE Temp. HW Temp. HWR TGP Thd. TOL TP Trav. Trp. TRV TT TW TX Typ. UHP UN2 UN2 / HN2 UPW UR UTIL V V Vent VAV VCR Vert. Vib.
MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations
Definition
Vlv.
Valve Valve manifold box. Usually contains multiple gas sticks Volumn Vent Thru Roof Waste With Without Water Closet Weld End or Weight Element Water for Injection Wall Hydrant Weld Neck Waste Oil Water Oil Gas Weld O Let Waste Oil Vent Water - Potable Weight Weight Transmitter Wet Vacuum Cleaning By Xenon Extra Heavy Extra Strong Double Extra Heavy Wye One Reduction Two Reduction Three Reduction 50/50 Solder Joint 95/5 Solder Joint
VMB Vol. VTR W W/ W/O WC WE WFI WH WN WO WOG WOL WOV WP Wt WT WVC x XE XH XS XXH Y 1-R 2-R 3-R 50/50 95/5