Stainless steel elbow pipe fittings strength grade and corresponding regulations.

1. Corresponding regulations and regulations for the actual selection and use of stainless steel elbow fittings

When the pipe fittings are actually selected or used, they must first comply with the relevant regulations and specifications, especially in the case of conveying extremely or highly hazardous fluid medium, flammable medium and high pressure gas. Under this premise, the type of pipe is determined mainly according to the use and conditions of use (pressure, temperature, fluid medium). The following is a list of relevant regulations/specifications for reference only.
1. Special equipment safety supervision method;
2. Special equipment safety inspection regulations;
3. Pressure pipe safety management and supervision regulations;
4. Special equipment quality supervision and safety supervision regulations;
5. Provisions for the design, manufacture and installation of special equipment;
6. Pressure pipeline safety technical supervision procedures;
7. Technical specifications for industrial metal pipelines;

Second, the determination of the strength grade of stainless steel elbow pipe fittings
1. Pipe fittings whose nominal pressure or specified pressure-temperature rating is expressed by the nominal pressure shall be based on the pressure-temperature rating specified in the standard, such as GB/T 17185;
2. In the standard, only the pipe fitting with the nominal thickness of the straight pipe connected to it is specified. The applicable pressure-temperature rating is determined according to the standard pipe grade specified by the standard, such as GB14383~GB14626.
3. In the standard, only pipe fittings with external dimensions, such as GB12459 and GB 13401, shall be determined by confirmatory tests to determine their compressive strength.
4. Others, pressure design or analytical analysis should be carried out according to relevant regulations to determine the basis of use. In addition, the strength rating of the pipe should be determined not less than the pressure of the entire pipeline system under the most severe operating conditions that may be encountered during operation.