Can stainless steel container flanges be designed in accordance with JB/T4700～4703-2000?
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Many heat exchangers can be seen, as well as container flanges made of 304, 316, 304L, and 316L materials; these are designed in accordance with JB/T4700–4703-2000. However, stainless steel materials are not mentioned within the scope of application of the standards; is such a design reasonable? Also, for many flanges of stainless steel containers, the design institutes do not provide drawings; instead, they follow the standards specified in JB/T4700–4703-2000. What do people think about this issue?
It should be possible, but the maximum allowable operating pressure cannot be taken directly from the standards
The standards can be written directly on the diagram; however, design calculations should be carried out during the design process.
The drawings provided by the design institute use the standard sizes for the stainless steel container flanges, without any calculations being done.
This standard has been revoked; the new standards NB/T47020~47027-2012 should be selected based on the operating conditions of the equipment.
The scope of application for this standard is limited to carbon steel and low-alloy steel.
Yes, flanges made of stainless steel lining are also used. For pure stainless steel flanges, the dimensions specified in this standard can be referred to; however, they must pass strength calculations before they can be used.
Whether the design institute has performed the calculations or not, you can only check whether there are any calculation items for flanges in their calculation documents
According to this standard, once the dimensions of the corresponding flange are calculated based on the design parameters and found to be satisfactory, it can be used!