you can take the car as sample
before the car key has turn on, the engine is not running, you go to check the brake, windshield, tie, enigne, eletrical system....is installed well or not and the defect of component, this procedure is cold commisonning
after you turn on, the engine is running, then you check again to detect the flaw. this is hot-commissioning
you will always like to know the engine is installed well before you run it and make sure it run well the drive the car.
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Installation of a system or machinery up to the point of being able to start running is erection. Commissioning is preparing for running or taking into use of the installed system or machinery by making preliminary tests and checks (pre-commissioning) and initially running the system or machinery or taking it into use while checking and setting all of its running parameters in accordance with its design (hot commissioning).
the hot water valve shut off valve shuts off the hot water. The cold water valve shuts off the cold water. ;()
A cold drawn seamless pipe has better dimensional tolerance, a higher surface finish and better mechanical properties than an equivalent hot finish seamless pipe. For applications that can make use of the thinner pipe walls and closer tolerances, a cold drawn seamless pipe is the better option.
Cold molding is the process of curing laminates such as fiberglass and carbon fiber at normal temperatures. Hot molding I when the laminate are cured in an oven or autoclave.
No, cold water is piped into the hot water tank and is heated by electricity or gas, it then flows out to the hot water taps.