What does PN represent in stainless steel weld neck flange?
Low-pressure small diameter wire-jointed weld neck flange, high-pressure and low-pressure large diameter weld neck flange are used stainless steel weld neck flange, the thickness of weld neck flange under different pressure and the diameter and number of connecting bolts are different. In high-pressure equipment and pipelines, lenticular or other shaped metal gaskets made of copper, aluminium, steel No. 10 and stainless steel are used. The contact width between the high pressure gasket and the sealing surface is very narrow (line contact), and the processing smoothness between the sealing surface and the gasket is relatively high.
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