What does LG in the flange represent regarding the sealing surface? Waiting for an answer online
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In flanges, what does LG stand for in terms of sealing surfaces, or does it have some other meaning, such as ANSI 300 SLIP-ON LG?
There are differences between ASME flanges and those according to national standards in this regard; the flange groove surfaces of ASME and ANSI standards are divided into large-groove and small-groove types. This LG refers to the large groove surface
Foreign standard sealing surface code: FF---wide-face seal； RF----Narrow-face seal (protruding face) ； RJ----Annular gasket sealing surface ； LM----large convex surface ； LF---large concave surface ； LT---Large tenon surface ； LG----Large tenon groove surface ； LN----lens surface ； SM---small convex surface ； SF---small concave surface ； ST---small tenon surface ； SG----Small tenon groove surface
May I ask in which standard it was found? I’ve run into this SG issue now, and I’m not sure how to choose the gasket. I hope you can give me some advice!