I need help, guys. Please explain pressure pipelines to me
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I find Baidu’s definition of pressure pipelines a bit hard to understand. I hope the experts here can explain it in simpler terms; giving some examples would also be helpful. Thank you all
It’s just that one paragraph; read it several times and try to distinguish the various elements. 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 or more (gauge pressure), where the medium can be a gas, liquefied gas, steam, or a liquid that is flammable, explosive, toxic, corrosive, and whose maximum operating temperature is equal to or higher than its standard boiling point. Additionally, such pipelines must 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
This post was last edited by Qise Haifeng on 2021-2-8 at 10:05. Generally speaking, pipes with a diameter of 50 mm or more can be classified as pressure pipes. However, there are certain restrictions for pipes of 50 mm or more in diameter; for instance, pipes carrying gases, liquefied gases, steam, or substances that are flammable, explosive, toxic, or corrosive are considered pressure pipes. If the medium is a non-toxic liquid, then liquids with a maximum operating temperature equal to or higher than their standard boiling point – such as condensate water when the operating temperature is above 100 degrees – and with a diameter of 50 mm or more, are also classified as pressure pipes； Fire water, with normal operating temperature; even if the pipe diameter is greater than 50 mm, it is not a pressure pipeline. There are two additional exceptions: one is gases that are non-toxic, have a nominal diameter of less than 150 mm, and a maximum operating pressure of less than 1.6 MPa; such gases do not constitute pressure pipelines. These two conditions apply simultaneously. For example, nitrogen or purified air is non-toxic, has a diameter of 100 mm, and an operating pressure of 1.0 MPa – in this case it is not a pressure pipeline. However, if its diameter is 200 mm with the same operating pressure of 1.0 MPa, then it is considered a pressure pipeline. Another exception is the pipelines to which the equipment itself belongs, that is, the piping associated with the equipment. The boundaries in this regard are not very clear, but it is quite obvious in the case of boiler pipelines; for many boiler installations, it is possible to cover both the piping belonging to the boiler and most of the pressure pipelines together as part of the boiler installation process. The relevant procedures for such installations follow those for boiler installation, including notifications and supervision inspections.
Thank you very much, thanks:handshake
Check the pressure at a glance； Second, check the diameter ； Third, look at the medium: lol
Check the pressure at a glance； Second, check the diameter ； Third, look at the medium: lol
Do both need to be met, or is meeting just one of them sufficient?
Do both need to be met, or is meeting just one of them sufficient?
Do both need to be met, or is meeting just one of them sufficient?
A comma or “or” – either one is sufficient. “And”, both conditions must be satisfied simultaneously. Pressure, pipe diameter, and medium are in a ‘and’ relationship.