Gasket labeling
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The drawing indicates: GASKET, SPIRAL WOUD, 06CR19NI10-GRAPH, IR:304, OR:CS, CL600, T=4.5MM, HG/T20631. I would like to ask what IR:304 and OR:CS mean Literally speaking, 304 can be used or carbon steel can also be used, but it seems not entirely accurate. Who knows? Could you explain it?
IR is the inner ring, inner ring； OR is the outer ring.
The gasket tape has inner and outer rings; IR:304, OR:CS means that the inner ring is made of 304 material while the outer ring is made of carbon steel. Take a look at HG20631; it explains several types of wound gaskets