Pipefitter
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A pipefitter or steamfitter[1] is a tradesman who installs, assembles, fabricates, maintains, and repairs mechanical piping systems. Pipefitters usually begin as helpers or apprentices. Journeyman pipefitters deal with industrial/commercial/marine piping and heating/cooling systems. Typical industrial process pipe is under high pressure, which requires metals such as carbon steel, stainless steel, and many different alloy metals fused together through precise cutting, threading, grooving, bending, and welding. A plumber concentrates on lower pressure piping systems for sewage and potable tap water in the industrial, commercial, institutional, or residential atmosphere. Utility piping typically consists of copper, PVC, CPVC, polyethylene, and galvanized pipe, which is typically glued, soldered, or threaded. Other types of piping systems include steam, ventilation, hydraulics, chemicals, fuel, and oil.[2]
In Canada, pipefitting is classified as a compulsory trade, and carries a voluntary "red seal" inter-provincial standards endorsement. Pipefitter apprenticeships are controlled and regulated provincially, and in some cases allow for advance standing in similar trades upon completion.
In the United States, many states require pipefitters to be licensed. Requirements differ from state to state, but most include a four- to five-year apprenticeship. Union pipefitters are required to pass an apprenticeship test (often called a "turn-out exam") before becoming a licensed journeyman. Others can be certified by NCCER (formerly the National Center for Construction Education and Research).
Occupational summary
Pipefitters install, assemble, fabricate, maintain, repair, and troubleshoot pipe carrying fuel, chemicals, water, steam, and air in heating, cooling, lubricating, and various other process piping systems. Pipefitters are employed in the maintenance departments of power stations, refineries, offshore installations, factories, and similar establishments, by pipefitting contractors.[3]
Scope of work
- Blueprint reading
- Detailing
- CAD drawing coordinators
- Layout
- Pipe threading
- Pipe grinding
- Plasma cutting
- Gas arc cutting
- Rigging
- Brazing
- Soldering
- Mitering
- Tube bending
- Valve installation and repair
- Mechanical pipe cutting and grooving
- Supports and hanger installation
- Preparation and installation of medical gas piping
- Welding; GMAW, TiG, SMAW, Orbital)
Trade groups
In North America, union pipefitters are members of the United Association. Wages vary from area to area, based on demands for experienced personnel and existing contracts between local unions and contractors. The United Association is also affiliated with the piping trades unions in Ireland and Australia.
Differences between pipefitting and pipelaying
Pipefitters should not be confused with pipelayers. Both trades involve pipe and valves and both use some of the same tools.[4] However, pipelayers usually work outside, laying pipe underground or on the seabed, whereas pipefitters typically work inside, installing piping in buildings, aeroplanes, or ships.[4] One author summarizes the different tasks this way:
Pipe layers operate the backhoes and trenching machinery that dig the trenches to accommodate the placement of sanitary sewer pipes and stormwater sewer drainpipes. They use surveyor’s equipment to ensure the trenches have the proper slope and install the pieces of pipe in the trenches, joining the ends with cement, glue, or welding equipment. Using an always-open or always-closed valve called a tap, pipe layers connect them to a wider system and bury the pipes.
Pipe fitters plan and test piping and tubing layouts; cut, bend or fabricate pipe or tubing segments; and join those segments by threading them, using lead joints, welding, brazing, cementing, or soldering them together. They install manual, pneumatic, hydraulic and electric valves in pipes to control the flow through the pipes or tubes. These workers create the system of tubes in boilers and make holes in walls and bulkheads to accommodate the passage of the pipes they install.[4][5]
Occupational hazards
Pipe fitters are often exposed to hazardous or dangerous materials, such as asbestos, lead, ammonia, steam, flammable gases, various resins and solvents including benzene and various refrigerants. Much progress was made in the 20th century toward eliminating or reducing hazardous materials exposures. Many aspects of hazardous materials are now regulated by law in most countries, including asbestos usage and removal and refrigerant selection and handling.[6] A major occupational hazard that pipefitters face is from welding fumes, including ultraviolet light, heavy metals, and chlorinated compounds during welding or torch cutting. Contact with previously mentioned solvents, adhesives, and epoxies during repair or installation of PVC/ABS pipes. Exposure to materials and liquids in old pipes during repair or removal.[7]
Other occupational hazards include exposure to the weather, heavy lifting, crushing hazards, lacerations, and other risks normal to the construction industry.
See also
References
- ^ "Steamfitter/Pipefitter: School of Trades and Technology". Thompson Rivers University. Retrieved 2019-02-19.
- ^ https://tradesecrets.alberta.ca/trades-occupations/profiles/0074/ Steamfitter/Pipefitter Trade Profile. Alberta Trade Secrets. 1995-2010.
- ^ "Explore Careers by Occupation". Job Bank. 2017-01-31. Retrieved 2017-02-23.
- ^ a b c Will Charpentier, "Pipe Layers vs. Pipe Fitters", Demand Media.
- ^ "Naperville Plumber". Saturday, 30 July 2022
- ^ Davenport, C. (2024, March 19). U.S. Is Banning the Last Type of Asbestos Still in Use. New York Times, A13. https://link.gale.com/apps/doc/A786785917/OVIC?u=lom_waynesu&sid=summon&xid=dd996db6
- ^ Construction Safety Association of Ontario. "Occupational Health Risks: Pipe Trades" (PDF).
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External links
- Pipe Hangers & Support
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concepts
- Air gap (plumbing)
- Backflow
- Compatibility (chemical)
- Corrosion
- Drain (plumbing)
- Drinking water
- Fuel gas
- Friction loss
- Grade (slope)
- Greywater
- Heat trap
- Hydrostatic loop
- Leak
- Neutral axis
- Onsite sewage facility
- Pressure
- Sanitary sewer
- Sewer gas
- Sewage
- Sewerage
- Siphon
- Storm sewer
- Stormwater
- Surface tension
- Tap water
- Thermal expansion
- Thermal insulation
- Thermosiphon
- Trap (plumbing)
- Venturi effect
- Wastewater
- Water hammer
- Water supply network
- Water table
- Well
- Brazing
- British Standard Pipe (BSP)
- Cast iron pipe
- Chemical drain cleaners
- Compression fitting
- Copper tubing
- Crimp (joining)
- Drain-waste-vent system
- Ductile iron pipe
- Flare fitting
- Garden Hose Thread (GHT)
- Gasket
- Hydronics
- Leak detection
- National Pipe Thread (NPT)
- Nominal Pipe Size (NPS)
- O-ring
- Oakum
- Pipe (fluid conveyance)
- Pipe dope
- Pipe support
- Plastic pipework
- Push-to-pull compression fittings
- Putty
- Sealant
- Sewage pumping
- Soldering
- Solvent welding
- Swaging
- Thread seal tape
- Threaded pipe
- Tube bending
- Water heat recycling
- Atmospheric vacuum breaker
- Automatic bleeding valve
- Automatic faucet
- Backflow prevention device
- Ball valve
- Bleed screw
- Booster pump
- Butterfly valve
- Check valve
- Chemigation valve
- Chopper pump
- Circulator pump
- Cistern
- Closet flange
- Concentric reducer
- Condensate pump
- Coupling (piping)
- Diaphragm valve
- Dielectric union
- Double check valve
- Eccentric reducer
- Expansion tank
- Faucet aerator
- Float switch
- Float valve
- Floor drain
- Flow limiter
- Flushing trough
- Flushometer
- Gate valve
- Globe valve
- Grease trap
- Grinder pump
- Hose coupling
- Manifold
- Needle valve
- Nipple (plumbing)
- Pinch valve
- Piping and plumbing fitting
- Plug (sanitation)
- Pressure regulator
- Pressure vacuum breaker
- Pressure-balanced valve
- Pump
- Radiator (heating)
- Reduced pressure zone device
- Reducer
- Relief valve
- Riser clamp
- Rooftop water tower
- Safety valve
- Sewage pump
- Street elbow
- Submersible pump
- Tap (valve)
- Thermostatic mixing valve
- Trench drain
- Vacuum breaker
- Vacuum ejector
- Valve
- Water tank
- Zone valve
- Accessible bathtub
- Bathtub
- Bidet
- Dehumidifier
- Dishwasher
- Drinking fountain
- Electric water boiler
- Evaporative cooler
- Flush toilet
- Garbage disposal unit
- Hot water storage tank
- Humidifier
- Icemaker
- Instant hot water dispenser
- Laundry tub
- Shower
- Sink
- Storage water heater
- Sump pump
- Tankless water heater
- Urinal
- Washing machine
- Washlet
- Water dispenser
- Water filter
- Water heater
- Water softener
and control
trades,
and services
organizations
and standards
- Fire sprinkler system
- Piping
- Template:HVAC
- Template:Public health
- Template:Sewerage
- Template:Toilets
- Template:Wastewater