一段话21? 3.openings with service covers shall be cleaned and fitted with their service covers ,gaskets and bolting. 并配备工作法兰盖、垫片以及螺栓连接件 (根据上文,cover应该是指flange cover。service修饰后边三项的。比如试压中垫片一般会受损,需要换用test gasket,试验结束后正常运行中应换上service gasket---工作垫片)。 -------------------------fyi查看更多