Who knows what LT/LG stands for in this gasket notation?

2021-04-06View Original

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Spiral-wound gasket 0.5" CL300 LT/LG ASME B16.20 304LSS+Graphite GSWAC4CBTLAMDZZ J17061905

Reply #22021-04-06

I’ve figured it out now: it represents the sealing surface. Sealing on tongue-and-groove surfaces (TG) is divided into tongue sealing (LT) and groove sealing (LG)

Reply #32021-04-07

ASME B16.20 stipulates: “All spiral-wound gaskets shall have centering rings.” However, spiral-wound gaskets with centering rings cannot be used on tongue-and-groove flanges.

Reply #42021-04-07

So, how should we interpret this way of expressing oneself by the client?

Reply #52021-04-07

ASME B16.20 can only be used for raised-face flanges; you should ask the design unit to explain your question.

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Who knows what LT/LG stands for in this gasket notation?

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