The cryogenic piping standard is a comprehensive system that covers material selection, design, manufacturing, installation, testing and other aspects. Here are some key takeaways from the cryogenic piping standard:
Material selection
The commonly used materials for low-temperature pipelines mainly include low-temperature carbon steel, stainless steel, nickel alloy, etc. These materials need to have good toughness and corrosion resistance at low temperatures to ensure stable operation of pipelines under extreme conditions.
Devise:
Temperature Control and Stability
Cryogenic pipes typically operate at low temperatures, so the temperature must be tightly controlled and stable to prevent damage to pipes and accessories.
Strength calculation and safety factor
The design of low-temperature pipelines needs to meet the strength requirements, including the influence of internal pressure, external load and temperature stress, etc., to ensure that the pipeline has sufficient strength and stiffness under the action of low temperature and external force.
Pipe connection and sealing
The connection method (such as welding, threading and flange, etc.) should be reasonably selected in the design, and corresponding sealing measures should be taken to ensure the reliability and tightness of the connection.
Manufacturing and testing:
The manufacturing process needs to follow relevant standards, including material inspection, processing, welding, etc. After the manufacturing is completed, the pipeline should be tested for performance, such as thermal conductivity, pressure resistance, working temperature, etc., to ensure product quality and performance.
Installation
During the installation process, it is necessary to consider the layout, flexibility, vibration control and other factors of the pipeline, and strictly follow the relevant standards and specifications. In addition, construction personnel should receive appropriate safety training to understand the characteristics and safety requirements of cryogenic pipelines.
Standards and specifications
The design, manufacture and installation of cryogenic pipes also need to comply with a series of national and international standards and specifications, such as GB/T 20801 (Code for Pressure Piping – Industrial Piping), ASME B31.3 (“Process Piping”), etc. These standards and specifications provide guidance and basis for the design, construction and operation of cryogenic pipelines.
Overall, cryogenic piping standards are designed to ensure the safe, reliable, and efficient operation of cryogenic piping under a wide range of extreme conditions. As technology continues to evolve and advance, these standards will be updated and improved. In practical application, appropriate standards and specifications should be selected according to the specific situation and strictly followed.
