这是今天看到一份资料里对此法兰连接的解释: 4 o2 P: n/ I( WRing-type joint (RTJ)—a flange with a circumferential groove machined " s! j( F) x; L. Q- N* hinto the flange face, which requires an oval or an octagonal circular ring- g0 ?+ G7 g2 C2 ]+ h
gasket to make the pressure seal. & v+ Q( M- D5 o# Q- @希望对有同样问题的朋友 有帮助:)