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Within industry, piping is a system of pipes used to convey fluids (liquids and gases) from one location to another. The engineering discipline of piping design studies the efficient transport of fluid.Industrial process piping (and accompanying in-line components) can be manufactured from wood, fiberglass, glass, steel, aluminum, plastic, copper, and concrete. The in-line components, known as fittings, valves, and other devices, typically sense and control the pressure, flow rate and temperature of the transmitted fluid, and usually are included in the field of piping design (or piping engineering), though the sensors and automatic controlling devices may alternatively be treated as part of instrumentation and control design. Piping systems are documented in piping and instrumentation diagrams (P&IDs). If necessary, pipes can be cleaned by the tube cleaning process.
Piping sometimes refers to piping design, the detailed specification of the physical piping layout within a process plant or commercial building. In earlier days, this was sometimes called drafting, technical drawing, engineering drawing, and design, but is today commonly performed by designers that have learned to use automated computer-aided drawing or computer-aided design (CAD) software.
Plumbing is a piping system with which most people are familiar, as it constitutes the form of fluid transportation that is used to provide potable water and fuels to their homes and businesses. Plumbing pipes also remove waste in the form of sewage, and allow venting of sewage gases to the outdoors. Fire sprinkler systems also use piping, and may transport nonpotable or potable water, or other fire-suppression fluids.
Piping also has many other industrial applications, which are crucial for moving raw and semi-processed fluids for refining into more useful products. Some of the more exotic materials used in pipe construction are Inconel, titanium, chrome-moly and various other steel alloys.

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  1. M

    Unvented cylinder D2 pipework installation to toilet waste pipe

    Hi guys, just want to get advice, i want to replace venten to unvented cylinder, is it ok to install D2 pipe to toilet waste pipe see picture? as there is no easy options to get it outside.
  2. C

    Chasing wall for basin pipework under window in bungalow

    I’m fitting a small basin on a floating countertop (30x40cm) and will be chasing the internal clinker block wall to around 100mm wide to accept a 32mm waste and two 15mm copper pipes. There is no option to box the pipes in whatsoever due to space. I’m looking to fill the cavity with foam rather...
  3. F

    How dangerous is air testing pipework

    I've air tested pipework for years, typically 4 bar for 30 minutes. I've never had an issue with any pipework that has passed that test, occasionally you get a small leak from the air test typically old cap ends/scratched pipe which shows up easily on the test without having to inspect anything...
  4. I

    Bathroom Renovation: Full removal, tiling, new fixtures

    Size of bathroom 230cm x 210cm Height 230cm Birmingham Area Initial problem Burst pipe underground in bathroom, concrete. Have had this dug up & made safe for now, have had affected pipe cut & put end caps on. Work required Full bathroom remove old tiles walls and floor. Renew tiling. New...
  5. H

    small heatrae megaflow pipework query

    Hi all , i came across a heatre mega flow today and couldn't get my head round something , it was heated via a boiler through the coil but the puzzle is that there was a secondery return from the hot water circut that also acted as the cold feed in seprated by a NRV to stop the hot going back...
  6. C

    Unknown lead (?) Pipework to building exterior

    Hello all, I'm preparing an estimate for a bathroom renovation in a block of flats. As always I'm trying to flag up / plan for and cost as many possible unknowns as possible in advance. One thing that I've not seen before is the ~50mm pipework connecting into the soil stack (see picture). My...
  7. H

    Pipework changes needed to replace a conventional boiler to a combi ?

    What pipework changes are needed to replace a conventional open vented gravity boiler to a combi boiler ? Would toilet flush/cisterns need replacing ?
  8. W

    Can I have single zone central heating when pipe installed for 2 zone?

    A bit of clarification - I have extended a 3 bedroom semi detached and at the time central heating pipes were going in I told the plumber could I have 2 zones - one for bedrooms upstairs and another for the living areas downstairs. Now the plastering has been finished and I am costing the combi...
  9. irishwildman

    Outdoor Gas Meter Pipework

    hi i am currently moving home and i have been told by a plumber that the enc pipework into/out of this gas box would not pass a gas safety test. I have also been given a safety certificate to say that there is nothing wrong with the pipework. Can anyone advise thanks
  10. R

    New render and pipework

    Do I arrange new pipework to be fitted (downpipes and sink and washing machine waste pipes) before or after new render is applied?
  11. C

    Pumping over on vented system, despite cleaning, new pipework and ..

    … praying to the plumbing God, Bob Pictures and layout details attached, so be patient. 21 year old oil fired system in pretty good nick. I noticed some minor pumping over from the vent (occasional burst of water, and the odd dribble). Didn’t think much of it as I was about to replace the...
  12. I

    Is this pipework acceptable???

    Hi, we've had our central heating system put back into the ground after all the pipework being in the attic. I don't know anything about plumbing so I paid up when the job was finished (£1000) my husband and father in law came home and were not happy with the pipework! The pipes are way above...
  13. K

    Is this pipework correct for a shower

    We are having a shower fitted and the pipework in our loft looks very fragile, is this correct?
  14. J

    Old pipework size in bathroom

    Hi I've had to cut hot and cold feed to re route for bathroom feeds. The 22mm Copper pipe hot feed is slightly smaller then my 22mm Copper. Solder fittings just slip over it and are really loose so I gather this is old imperial pipe, so I shall use a 3/4 to 22mm coupler. However on the...
  15. S

    Boiler bypass pipework – correct design?

    A plumber recently told me my bypass pipework is poorly designed as it’s offering a low path of resistance v the motorised valve T junctions, and therefore is passing water constantly. I have noticed that, some minutes after the CH starts up, this bypass pipe gets hot along its entire length up...
  16. McDoosh

    Vaillant EcoTec - 10mm pipework to radiators?

    Hi, just about to bite the bulklet on a new boiler and radiators, Vaillant EcoTec Plus 32kW. Is 10mm pipework to the radiators sufficient? Thanks
  17. M

    Where should I connect my garden tap pipe?

    Hi everyone, I'm about to install a garden tap pipe on a new build, but I'm a bit confused with the pipework I'm seeing under the kitchen sink. Here is a picture of what I'm seeing: Pipe A - Cold water pipe. Pipe B - Behind the wood plank, B connects to a valve that shuts down the entire...
  18. chloeradhsaw

    Cutting Barrel Steel Pipework For new cylinder

    I have a hot water cylinder which has low carbon steel pipework to it - I have tried to add some pictures I need to replace the cylinder because it is leaking and I am not able to find anyone who is comfortable to work on this this because it is barrel steel - Has anyone worked on this kind of...
  19. M

    28mm to 22mm pipework

    Hi All, I am in the process of renovating a property and have the floorboards up installing cabling etc, however it is the plumbing that I have to question and would like some advice if possible. The issue has been bugging me for ages as the house is my later fathers and I have always wondered...
  20. B

    [Chemical] flush of existing pipework after lead pipe replacement?

    Hi there, Have bought an old house and am having the old lead water mains pipe replaced and a new stopcock location/piping installed after massively high readings from water testing by the water company. Also buying new plastic water tank to start afresh so to speak. Pipework/joinery looks to...
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