What is the pressure on the PE pipePE pipes have different pressures according to different uses. The water supply pipe 100 and the mining pipe 100 are divided into five levels: 0.6Mpa; 0.8Mpa; 1.0Mpa; 1.25Mpa; 1.6Mpa.
Gas pipe 100 is divided into: ≤0.6MPA, ≤1.0mpa
The gas pipe PE80 is divided into: ≤0.2MPA, ≤0.4mpa
How much pressure the PE pipe can hit depends on its pipe diameter and wall thickness. In addition, the pressure test is to meet the pressure requirement of 1.5 times.
The tensile strength of PE pipe has nothing to do with the wall thickness, and there is no calculation formula. The tensile strength of the PE pipe is the maximum tensile force per unit area when a fracture occurs after being stressed. Tensile strength refers to the resistance to the maximum uniform plastic deformation of the material. Before the tensile specimen is subjected to the maximum tensile stress, the deformation is uniform, but after exceeding it, the metal begins to shrink, that is, concentrated deformation occurs.
For brittle materials with no (or very small) uniform plastic deformation, it reflects the fracture resistance of the material. The symbol is Rm (GB / T 228-1987 old national standard specifies the tensile strength symbol is σb), the unit is MPa.
Welding of PE pipes, butt welds of PE pipes, this method provides the highest reliability and diameter range and pressure process: heating the end of the pipe, using a tool called "mirror image" under the definition of contact pressure and temperature ". The ends are quickly contacted and kept under pressure during the cooling process.
PE pipes include medium density polyethylene pipes and high density polyethylene pipes. According to the wall thickness, it is divided into SDR11 and SDR17.6 series. The former is suitable for transporting gaseous artificial gas, natural gas, and liquefied petroleum gas, and the latter is mainly used for transporting natural gas.
Compared with steel pipes, the construction process is simple and has certain flexibility. The main thing is that it is not used for anti-corrosion treatment, which will save a lot of processes. The shortcoming is that the instrument is not as good as steel pipe. Special attention should be paid to the safety distance of thermal heating during construction, and it should not be exposed to the sun in the air, and it is sensitive to chemicals to prevent damage caused by leakage of sewage pipes.