????????
???????
J61Y???????????????????????????á????????????????????????????????????????????16??25??32MPa ????????425?? 450?? 500?? 540?棬???????????????糧???????????
???????J61H/Y
?????????DN20~300mm
?????????PN1.6~3.2MPa
???????????????????????????????????
???????????????綯
???????E101??JB/T3595??DL/T531
???????E101??JB/T2766??GB/T15188.1
???-???????E101??JB/T3595
????????磺GB12224??JB/T3595??ASME B16.2
