About the classification of gas pipelines? Low voltage, medium voltage, secondary high voltage and high voltage are divided into two types: A and B. In which specification can we find relevant contents? The concepts of high pressure, medium pressure and low pressure are still used in the specification of pressure vessels. The natural gas pipeline is divided into seven levels: high pressure A, high pressure B, secondary high pressure A, secondary high pressure B, secondary high pressure A, secondary high pressure B and low pressure.

China city gas pipeline pressure is divided into:

Low pressure: less than or equal to 0.005 MPa

Medium pressure pipeline B: more than 0.005 and less than or equal to 0.2MPa.

Medium pressure pipeline A: more than 0.2 and less than or equal to 0.4MPa.

High-pressure pipeline B: greater than 0.4 and less than or equal to 0.8MPa.

High pressure pipeline A: more than 0.8 and less than or equal to 1.6MPa.

The definition of pressure pipeline is relatively strict, not to say that there is pressure or pressure pipeline, but from the possible consequences of pipeline damage, because the country regards pressure pipeline as one of seven special equipment to regulate. It is those pipelines that transport toxic, flammable, explosive, high temperature and high pressure. Low pressure, medium pressure and high pressure are generally divided according to specific pressures.

Extended data:

Synergist for natural gas pipeline refers to a special chemical component added to increase the flame temperature of natural gas when it is used in industrial cutting. Natural gas synergist is mainly divided into compressed natural gas synergist, pipeline natural gas synergist and liquefied natural gas synergist.

Therefore, natural gas synergistic technology appeared. Through intelligent mixing equipment, synergist was added to ordinary natural gas, and then it was transformed into industrial gas suitable for high efficiency, energy saving and environmental protection.

Baidu encyclopedia-natural gas pipeline