Flange selection must be based on the pressure, temperature, and medium conditions of the pipeline or equipment. Appropriate flange types, materials, and specifications must be chosen; flanges should not be arbitrarily replaced or mixed.
Flange installation must follow the design drawings and construction specifications, and be carried out according to the correct steps and methods. Arbitrary changes or omissions are not permitted.
Flange installation should be performed after the pipeline or equipment has been fixed in position. It should not be performed during the movement or adjustment of the pipeline or equipment to avoid deformation or damage to the flange.
Flange installation should be performed after the temperature of the pipeline or equipment has stabilized. It should not be performed during the heating or cooling process of the pipeline or equipment to avoid thermal expansion and contraction or stress changes in the flange.
Flange installation should be performed after the pressure in the pipeline or equipment has been released. It should not be performed during the pressurization or depressurization process of the pipeline or equipment to avoid flange rupture or leakage.
