Glossary and Abbreviations

MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations Definition ABS Acrylonitrile Butadiene Styrene Automat...
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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

ABW Adapt. ACR Adj. AEX AFF Alum. AR ASH3 AT ATC ATV AV AW AWN AWG AWS AWWA B&S B2H6 Bal. BCF BCL3 BD BE Bf. BF3 BFP BOD BP BR BTU Bush. BW C C2F6 C2H2F4 C2HF5 C3F8 C4F8 CA ©MCAA 2005

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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.

©MCAA 2005

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MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations

Definition

Diff. Dir. Disch. Dn. Drng.

FV Ga.

Diffuser Direct Discharge Down Drainage Dry Vacuum Cleaning Chilled Drinking Water Recirculating Chilled Drinking Water Supply Drainage, Waste and Vent Ecentric Equipment Cooling Water Electric Elbow Electropolished Expansion External Float & Thermostatic Flux Cored Arc Welding Floor Drain Flow Element Type of Fluoropolymer Tubing and Fittings for a Wide Range of Uses. Ferrule Flammable Exhaust Figure Female Iron Pipe Flow Indicating Transmitter Flexible Flange/ Flanged Fuel Oil Return Fuel Oil Supply Fuel Oil Vent Female Pipe Thread Floor Sink Flow Switch Foot Flow Transmitter Fitting Flush Valve Gage

gal. GEH4 GEX

Gallon Germane General exhaust

DVC DWR DWS DWV Ecc. ECW Elec. Ell. EP Exp. Ext. F&T FCAW FD FE FEP Ferr. FEX Fig. FIP FIT Flex. Flg. Flgd. FOR FOS FOV FPT FS FS ft. FT Ftg.

©MCAA 2005

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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

©MCAA 2005

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MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations

Definition

IPS

Iron Pipe Size Industrial Waste Industrial Waste Neutralization Joint Laboratory Compressed Air Lateral Lavatory Pound/ Pounds Pounds Per Hour Level Element Liquid Level Indicating Transmitter Lubricating Oil Lubricating Oil Vent Liquid Oxygen Lawn Sprinkler Supply Level Transmitter Lubricated Laboratory Vacuum Level Medical Compressed Air Manual Medical gases -- Vac, air, O2, N20 Gas-Medium Pressure Malleable Iron Male Iron Pipe Mechanical Joint Molybdemium Male Pipe Thread Mounted Multiple Medical Vacuum Nitrogen Nitrogen Nitrous oxide Normally Closed Neon Neoprene Nitrogen Trifluoride Natural Gas No Hub Ammonia

IW IWN Jnt. LA Lat. Lav. lb. lbs. Lb/Hr. LE Liq. LIT LO LOV LOX LS LT Lubr. LV Lvl. MA Man MED GAS MG MI MIP MJ Moly. MPT Mtd. Multi MV N N2 N2O NC NE Neo NF3 NG NH NH3 ©MCAA 2005

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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

PIT PIV PJ PN2 PN2 / HPN2 Pneu. Pos. PR & TRV Pres. PRV PSI PT PTFE PV / PVAC PVC PVDF ©MCAA 2005

Process Vacuum Poly Vinyl Chloride Polyvinylidene Fluoride Revision 3

MECHANICAL CONTRACTORS ASSOCIATION OF AMERICA, INC. Glossary and Abbreviations Abbreviations

Definition

PW RA RD Red. Reg.

Purified Water Unit used to measure surface roughness Roof Drain Reducing Regulator Regular Gasoline Roof Leader Round Reverse Osmosis Rising Stem Soil Sink Sanitary Submerged Arc Welding Steam condensate Schedule Screwed Scrubbed Exhaust Storm Drain, Rainwater Drain Standard Dimensional Ratio Sulfur Hexafluoride Safety Shower Single Hub Silicon tetrachloride Silicon tetrafluoride Dichlorosilane Silane Trichlorosilane Steam in Place Slip-Joint Solvent Exhaust Shielded Metal Arc Welding Slip On Solenoid Sock O Let Automatic Fire Sprinkler Spigot Square Sanitary Stack Stainless Steel

RG RL Rnd. RO RS S S SAN SAW SC Sch. Scrd. SCX SD SDR SF6 Sfty. SH SH SICL4 SIF4 SIH2CL2 SIH4 SIHCL3 SIP SJ SLX SMAW SO Sol. SOL SP SPIG sq. SS SS

©MCAA 2005

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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.

©MCAA 2005

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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

©MCAA 2005

Revision 3