Equipment flange
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What standards are used for manufacturing flanges on general equipment? For example, flanges on vacuum units, pumps, valves, and other devices that require flange connections； Can it match the pipe flanges specified in HG/T20592? For example, whether the thickness of the flanges on the equipment is the same as that of the pipe flanges, and whether the size of the screw holes, the screw pitch, and the diameter are all identical
There is a standard specifically for device flanges
Which one specifically? Is there one standard for all devices, or are the standards different for different devices? I would also appreciate your advice: lol
NB/T47020~47027-2012 Pressure Vessel Flanges
Standard equipment flanges are only available in carbon steel and low-alloy steel; there are no stainless steel versions. The flanges of equipment with the same specifications and pressure rating have smaller external dimensions compared to pipe flanges.
Yes, that’s exactly what causes a mismatch with the pipe flange, and as a result it can’t be used. How can this problem be solved? I would also appreciate some guidance from experts
Flanges range from GB/T 9113-2010 to GB/T 9124-2010; the appropriate standard is selected based on the design, with national standards taking precedence in theory! In the petrochemical industry, equipment was imported in large quantities in the past, which is why American and European standards were commonly used; nowadays, international standards such as those set by ISO are also adopted as much as possible. By keeping these standards clear, mistakes can be avoided. The key is to communicate with clients in a timely manner.
First, have the manufacturer provide the equipment specifications and nozzle interfaces, and then verify their compatibility in advance.
Check whether it is the equipment head or the pipe end