About the selection of pipelines
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The pipe material of DN100 PN2.0 is No. 20 steel. What are the specifications of general pipes? What is the outer diameter and inner diameter? Please give some expert guidance!
Wall thickness calculation requires design temperature and design pressure.
Metric pipe: ￠108X4.0 British pipe: ￠114.3X6.3
The outer diameter is determined and the inner diameter is determined by the wall thickness
The outer diameter is standard OD=114.3MM. The inner diameter must be calculated based on the design temperature and pressure to calculate the wall thickness. (Due to different design parameters, the wall thickness is divided into several series.) Only by knowing the wall thickness can the inner diameter be known.
The outer diameter of the pipe is divided into small diameter and large diameter. Different standards have different requirements. If the pipe with PN=100 complies with the ASME standard, its outer diameter is 114.3mm.
Metric pipe: ￠108X4.0 This specification is enough for general media. If the environment or medium is corrosive, use British pipes.: ￠114.3X6.3 The inner diameter is 100
According to the American standard, the outer diameter should be 114.3, and according to the national standard, it should be 108. Calculate the wall thickness according to your requirements, and you will know the outer diameter.
The nominal pressure level specified by the national standard is: 0.6MPa, 1.0MPa, 1.6MPa, 2.5MPa, 4.0MPa, 6.4MPa. I have never seen a 2.0MPa grade. The national standard DN100, PN2.5 pipe outer diameter is 108, and the thickness is: Not less than 3.5, but the commonly used pipe thickness of DN100 is 4mm, so you choose 108 * A 4-inch tube is enough, with an outer diameter of 108 and an inner diameter of 100.