Standards for classifying pressure pipelines:
1. Vacuum pipeline P<0MPa.
2. Low-pressure pipeline 0≤P≤1.6MPa.
3. Medium-pressure pipeline 1.6<P≤10MPa.
4. High-pressure pipeline 10<P≤100MPa.
5, Ultra-high-pressure pipeline P>100MPa.
From China issued the "Pressure Piping Safety Management and Supervision Regulations," after the "pressure pipeline" has become a special term for the pipeline subject to monitoring. In the "Pressure Piping Safety Management and Supervision Regulations" in the second article, the pressure pipeline is defined as: "in the production, life in the use of special equipment that may cause a greater risk of ignition and explosion or poisoning".
Expanded
Pressure piping operations are generally outdoors, laying methods of overhead, along the ground, buried, and often even high-altitude operations, environmental conditions are poor, quality control requirements are high. As the quality control link is interlocked, organic combination, a link a little negligence, resulting in quality problems.
And welding is a key work in the construction of pressure pipeline, the quality of its good and bad, high and low efficiency directly affects the safe operation of the project and manufacturing schedule, so the process quality control is more important.
According to the construction requirements of the pressure pipeline, it is necessary to strengthen the management of personnel, equipment, materials, process documents and the environment. Targeted to take strict measures in order to ensure the welding quality of pressure pipelines, to ensure the realization of high-quality welding projects.
Baidu Encyclopedia - Pressure Piping