Questions about steam pipes

It should belong to pressure pipelines. . . .

Yes, pressure pipelines refer to tubular devices that use a certain pressure to transport gases or liquids. They are defined as those with a maximum operating pressure of 0.1 MPa (gauge pressure) or more, where the medium is a gas, liquefied gas, steam, or a liquid that is flammable, explosive, toxic, corrosive, and has a maximum operating temperature equal to or higher than its standard boiling point; furthermore, such pipelines have a nominal diameter of 50 mm or more. Except for pipes with a nominal diameter of less than 150 mm and a maximum operating pressure of less than 1.6 MPa (gauge pressure), as well as the pipes that form part of the equipment used for transporting non-toxic, non-flammable, and non-corrosive gases. Among them, the safety supervision and management of oil and gas pipelines shall also be carried out in accordance with laws and regulations such as the Work Safety Law and the Oil and Gas Pipeline Protection Law. In the above new definition of pressure pipelines, those pipes used for transporting non-toxic, non-flammable, and non-corrosive gases, with a nominal diameter of less than 150 MM and a maximum operating pressure of less than 1.6 MPa (gauge pressure), are excluded from this definition. In this definition, steam and gases are considered two distinct concepts; therefore, low-pressure steam in the DN50 to 150 range is still classified as a pressure pipeline.

Upstairs is correct – it’s the definition updated last year, the definition under the new Work Safety Law.

Thank you for the reply from above; it cleared up my doubts. It seems to be a pressure pipeline

So, are asphalt pipes considered pressure pipes?

Of course, it belongs to low-pressure pipelines.

According to the latest catalog of special equipment, as defined in the announcement issued by the General Administration of Quality Supervision, Inspection and Quarantine regarding the revision of the “Catalog of Special Equipment” (No. 114 of 2014), a pressure pipeline refers to a tubular device that uses a certain pressure to transport gases or liquids. It is defined as a pipeline with a maximum working pressure of 0.1 MPa (gauge pressure) or more, carrying gases, liquefied gases, steam, or liquids that are flammable, explosive, toxic, corrosive, and have a maximum working temperature equal to or higher than their standard boiling point, and with a nominal diameter of 50 mm or more. Except for pipes with a nominal diameter of less than 150 mm and a maximum operating pressure of less than 1.6 MPa (gauge pressure), as well as the pipes that form part of the equipment used for transporting non-toxic, non-flammable, and non-corrosive gases. Among them, the safety supervision and management of oil and gas pipelines shall also be carried out in accordance with laws and regulations such as the Work Safety Law and the Oil and Gas Pipeline Protection Law. It definitely belongs to pressure pipelines

If you check using the relevant standards, you’ll get an approximate result; it should be above 0.1