What standards should be referred to for GB2 pipes with a design pressure greater than 2.5 MPa?

GB2-class pressure pipelines with a design pressure greater than 2.5 MPa must, in accordance with relevant Chinese regulations, be designed, manufactured, installed, and inspected in compliance with the \"Regulations on the Safety Management of Pressure Pipelines\" and the accompanying standards. GB2-class pressure pipelines refer to those that transport non-corrosive, non-highly toxic liquids, gases, or vapors, have a working pressure of more than 1.6 MPa, and whose medium toxicity level is classified as D or E. If the scope of application of commonly used standards such as CJJ/T 34-2022 \"Design Standards for Urban Heating Pipeline Networks\" and GB/T 38942-2020 \"Code for Pressure Piping – Public Piping\" does not meet the design requirements, for high-pressure GB Class 2 pipelines, it is usually necessary to refer to more stringent standards, such as: 1. GB 50251-2015 \"Code for Design of Chemical Process Piping\", 2. GB 50316-2000 \"Code for Construction and Acceptance of Industrial Metal Piping Projects\", 3. ASME B31.3 \"Process Piping\" (a piping standard established by the American Society of Mechanical Engineers, which can also be used as a reference for high-pressure piping design in China), 4. GB 50938-2014 \"Code for Design of High-Pressure Valves in Petrochemical Industries\", 5. GB 50160-2008 \"Code for Fire Protection Design of Petrochemical Enterprises\". It should also be noted that for pipelines handling specific media or under special operating conditions, relevant special **standards, industry standards, or corporate standards may also need to be referred to. When designing such high-pressure pipelines, it is not only necessary to comply with the aforementioned standards, but also to obtain the appropriate design permits for pressure pipelines and pass safety reviews. Furthermore, the design firm must have the appropriate qualifications, and the designers need to possess relevant professional knowledge and experience. Please note that standards may be updated at any time; therefore, when carrying out actual design work, it is necessary to refer to the latest versions of relevant standards and consult qualified professional institutions for accurate guidance. .