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Steel pipes for high pressure is used.
pressure in pipes
Pressure has nothing to do with pipes freezing. It is just exposure to cold.
There is no difference they are both cool
0.2 x(dia of pipe)x(length of pipe) For examble if you have 100mm diameter pipe and 50 m length .. 0.2x0.1x50= 1 litre and this is your allowable value
low pressure lines
Should be the same, when your home was originally built, it was pressure tested (without water). This assures that there is no leaks in the entire home, if the plumber knew what he/she was doing they designed the system to have the larger dimension pipes closer to the water meter and if designed correctly the furthest pipes from the water meter are the smallest dimension pipes in the house. This assures that when valves are opened in different parts of the house there is a greater likelihood of a maintained service pressure. Of course if you open a downstairs faucet (say a kitchen sink) and are doing laundry (in the basement) and then try to take a shower in an upstairs bathroom you will notice a drop in pressure.
GLASS REINFORCED PLASTIC (GRP) PIPES give all details relating to the specifiaction,process of manufacture,testing norms,usage and manufacturers of Glass Reinforced Pipes in India
You have air in your pipes, possibly a ruptured bladder in the pressure tank
The physical containment of fluids or gases under pressure. This can include tanks, pipes and hoses.
You should check your sink pipes if there is something clogging the pipes and creating that pressure. If you are unable to locate the problems, you should contact a plumber to inspect your sink.
Balvant Rajani has written: 'Long-term performance of ductile iron pipes' -- subject(s): Water-pipes, Iron pipe, Testing