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Common problem
Common-problem
Specification and pressure regulation of water supply pipe
At present, the production standards of water supply pipes mainly include British standard, American standard, Japanese standard, international standard and national standard (GB). However, Chinese manufacturers mainly produce according to the national standard (GB) because the national standard products are more in line with the national conditions and the quality is more stable.
The nominal inside diameter of the feed water pipe is 15mm, the nominal diameter of the feed water pipe is 22±0.3 and the nominal thickness of the pipe is 2.0±0.4(domestic DIN specification).
The nominal diameter of the feed water pipe is 20mm, the nominal diameter of the feed water pipe is 26±0.3, the nominal thickness of the feed water pipe is 3.0±0.5(domestic DIN specification).
The nominal inside diameter of the feedwater pipe is 25mm, the nominal outside diameter of the feedwater pipe is 32±0.3 and the thickness of the pipe is 4.0±0.6(domestic DIN specification).
The nominal diameter of the water supply pipe is 40mm, the nominal diameter of the water supply pipe is 50±0.3 and the nominal thickness of the pipe is 5.3±0.8(domestic DIN specification).
The nominal inside diameter of the water supply pipe is 50mm, the nominal outside diameter of the 2 "inch water supply pipe is 63±0.3 and the thickness of the pipe is 6.0±0.9(domestic DIN specification).
The nominal diameter of the feed water pipe is 80mm, the nominal diameter of the feed water pipe is 90±0.3 and the nominal thickness of the feed water pipe is 7.3±1.1(domestic DIN specification).
The nominal diameter of the feed water pipe is 100mm, the nominal diameter of the 4 "inch is 110±0.4, the pipe thickness is 8.0±1.2(domestic DIN specification).
The outer diameter of the feed water pipe is 225±0.7 and the thickness of the pipe is 12.0±1.8(domestic DIN specification).
The nominal inside diameter of the water supply pipe is 300mm, the nominal outside diameter of the 12 "inch water supply pipe is 315, the pipe thickness is 14.0±2.1(domestic DIN specification).
Pressure specification for feed water pipes
The pressure of the feed water pipe is expressed as nominal pressure (Mpa), and 1Mpa≈10kg/cm is the pressure of the conveying medium of the pipe under the temperature of 20℃, which can reflect the safe capacity of the feed water pipe to bear pressure. There are five kinds of pressure, namely 0.6mpa, 0.8mpa, 1.0mpa, 1.25mpa and 1.6mpa.
