What should I do if this happens?
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I used gaskets for heat exchangers that complied with two standards: JB4719 and JB4718. The management decided to switch to gaskets based on standard JB4718, but when submitting the material order, I listed the models specified in JB4719. It has been found that the arrangement of the metal part and the filler part differs between the two; for example, G33 in JB4719 is different from G33 in JB4718. Does this situation pose a risk to the safe operation of the equipment, and what should be done?
It depends on what pressure rating the equipment has; for ordinary equipment it doesn’t matter, but for high-temperature and high-pressure equipment, the design drawings provided by the design institute must be followed.
Friend, what criteria are used to classify high temperature and high pressure? Please explain in detail, thank you! 2# lnfszn008
JB4719-92: Metal wound gaskets for shell and tube heat exchangers; JB4718-92: Metal clad gaskets for shell and tube heat exchangers. It has been found that the gasket of model G33 under JB4719, which is the metal wound gasket for shell and tube heat exchangers, is being ordered. These metal wound gaskets are suitable for use in shell and tube heat exchangers with a rated pressure of 0.25–6.4 MPa and operating temperatures ranging from 70–450°C. The meaning of model G33 in JB4719 is as follows: G – Gasket for the tube sheet； 3--Stainless steel material of the winding strip: 00Cr17Ni14Mo2; 3--Filling strip: flexible graphite ； You can determine it based on its pressure rating and temperature.
I mentioned this at the regular meeting, but the manager said it was no problem. I had no choice but to do as he said!