文档介绍：各种截止阀的结构形式和设计标准截止阀种类                     截止阀结构形式                                      采用设计标准                                                                                                    GB/T12235-2007API6D                                                                                                              -2004                                                                                                                   BS5160-1989                              1、流道:角式、直通、直流(Y型)三种           BS1873-1999                              2、阀体与阀盖的连接:法兰                                   MSS-SP-42-1999 铸钢截止阀         3、连接端:法兰或对焊                                          JPI-7S-46-1999                              4、可以采用多种型式的阀瓣,常规为明杆           JISB2071-1999                               结构,少数口径较小的截止阀采用暗杆                 JISB2072-1999                               结构                                                                             JISB2081-1999                                                                                                                   JISB2082-1999                               1、流道                               JB/T7746-1995:缩孔                              BS5352-1999:通孔或缩孔                                 (class150~800);                               通孔(class1500)                                                   JB/T7746-1995