:100225855(2007)0420026202:(1949-),,(,215008);;;:TH134:AResearchonconnectionformsofbodyandbonnetofhighpressurevalvesusedforpetrachemicalindustryXUNai2ming(SuzhouHighandMediumPressureValveFactory,Suzhou215008,China)Abstract:Analysesthestipulationsofconnectionformsofbodyandbonnetofhighpressurevalvesandrelatedstandards,proposestheproblemswhichshouldbepaidattentiontoandhelpfulmeasurestakentoavoidvalveleakageonadoptingtheconnectionformofsealingstructureofpressureself2tightforbodyandbonnetusedforoilandchemicalindustryvalves.Keywords:valvesusedforoilandchemicalindustry;body;bonnet;connection1(),,,,,75%[1],,,,,21987,API6004(811,1),4API600-1997(8)API600-1991(9)11113,API600-1997(10),2,A,,,,,API600-2001(11)ISO,,,,,6220074(Velan)(1),,1API600-1987(8)11113,(OS&Y),,,API600-1991(9)11113,(OS&Y),,,API600-1997(10)11113,,,,AAPI600/ISO10424-2001(11),BS1873,,BS1868,,1Velan4API600,,API600,1J.(),1998(2).2API600,S.(:2007103130)7220074