文档介绍：不同截止阀的结构特点、形式及设计标准
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截止阀种类                          截止阀结构形式                                        采用设计标准
                                                                                                                   GB/T 12235-2007API 6D
                                                                                                                   ASME -2004
                                                                                                                    BS 5160-1989
                               1、流道:角式、直通、直流(Y型)三种            BS 1873-1999
                               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           JIS B2071-1999
                               结构,少数口径较小的截止阀采用暗杆                 JIS B2072-1999
                               结构                                                                             JIS B2081-1999
                                                                                                                    JIS B2082-1999
                                1、流道
                                JB/T 7746-1995:缩孔
                                BS5352-1999:通孔或缩孔