??????
???????
1???????з???????????????????????????????????
2??????????????????????0.6??1.6Mpa???????????С????????????????????????????????????6???????????????????????λ???????????????á?
???????DSZ44H
?????????DN50??800mm
?????????PN0.6??1.6Mpa
????????????????
??????????550??
???????API 600??ASME B16.34??DL/T 531??JB/T3595
???????DL/T 531??ASME B16.10??GB/T 12221
????????DL/T 531??JB/T3595??ASME B16.25
??????飺API 598??GB/T 13927??JB/T 9092
???-???????API 598??GB/T 13927??GB/T 26480??JB/T9092??JB/T3595