Equipment flange standards
Thread Content
What are the standard specifications for valves, pipeline filters, and the flanges used to connect pumps? Is HG/T20592 the standard that is applied in all cases?
In a typical system, it is best to follow one standard. Equipment, pipes, and flanges should be kept as uniform as possible; otherwise, it becomes very troublesome and errors are likely to occur.
Pipe flanges: Standard HG/T20592-2009; Equipment flanges: Standards NB/T 47008–47010-2017
It is based on this, your question~ in accordance with the pipe flange standards
This is the European standard; this is the one commonly used. However, depending on customer requirements, American or Japanese standards may also be used. Each standard size is different.
For example, which standard is used to determine the flange thickness of ball valves? If HG/T20592 is applied, the thicknesses of SO, WN, and PL valves with the same pressure and specifications differ
Specify the flange connection standards at the time of ordering, including the type of sealing surface, nominal pressure, and nominal diameter; require the manufacturer to do this
In fact, there is indeed a slight difference between HG/T20592-2009 and the 1997 version regarding flange thickness; once you specify your requirements, the manufacturer will naturally follow those specifications~
For example, let’s say I want to purchase a ball valve made of carbon steel with a nominal diameter of DN50 and a nominal pressure of 1.6 MPa. Nominal diameter: DN50; Quantity: 1 unit; Material: Carbon steel. Remarks: The flange connected to it must comply with the standards HG/T20592-2009, Flange PL50(B)-16 RF, Q235B 50(B); here, “B” refers to the B-series pipe diameter (outer diameter of 57 mm), in accordance with European standard specifications. Is this detailed enough? Do you understand?
HG/T20615 is also
I see. Recently, there was a safety inspection at the factory, and the people from the safety inspection team found that the thickness of our valve flanges and the flanges of the pipes connected to the valves were different. They said that these two types of flanges follow different standards, which poses a safety risk. What’s your opinion on this issue?