Selection of pipeline materials for chemical plants

The selection of material for pipes in chemical processing plants should take into account factors such as the properties of the medium, operating conditions, environmental conditions, as well as cost and feasibility. In China, the selection of pipeline materials for chemical processing plants is primarily based on the following specifications and standards: 1. **GB 50316-2016 “Code for Design of Piping Systems in Chemical Enterprises”**: This is the most commonly used specification for the design of chemical pipelines at present. It outlines the basic requirements for pipeline design, material selection, pipeline components, accessories, as well as the selection of pipe supports and hangers. 2. **TSG D0001 “Regulations on the Safety Management of Pressure Pipelines”**: This is one of the safety regulations for special equipment; it is used to standardize the safety management and inspection of pressure pipelines, ensuring their safe operation, and it includes basic requirements regarding the selection of materials for such pipelines. 3. **SH Standards (Shanghai Local Standards)**: The SH standards include SH 3408, SH 3409, etc.; these standards apply to different types of chemical equipment and pipelines and possess certain local characteristics. 4. **HG Standards (Chemical Industry Standards)**: The HG standards include numerous specific specifications for chemical industry equipment and piping, such as HG 20582 \"Selection Standards for Steel Low-Pressure Industrial Piping\", and they are standards designed specifically for piping and equipment used in the chemical industry. For devices that comply with the SH standard and the HG standard, the specifications for selecting pipeline materials are generally similar, but there may be differences in some specific standards or requirements. Therefore, when making a specific material selection, it is necessary to take into account the actual processing conditions, the properties of the medium, and the specific requirements of the device, while also referring to the latest applicable ** or industry standards. In addition, it is necessary to consider the \"Specifications for Construction and Acceptance of Chemical Engineering Projects\", as well as other relevant **standards and industry standards, such as ASME (American Society of Mechanical Engineers) specifications, DIN (German Industrial Standards) and other international standards, when dealing with specific materials or special processes (such as corrosion resistance, high temperatures, high pressures, etc.). When carrying out specific design and material selection, professional engineers or designers are required to conduct detailed calculations and analyses, and make decisions by referring to the aforementioned standards and actual operating conditions. At the same time, the economics and safety of the pipelines must be considered to ensure the reliability and durability of the pipeline system. .

There is a difference; design institutes usually choose it for you

**SH standard (Shanghai local standard): This is a petrochemical standard