HG/T 20592  法兰 IF 80-25 T¨�-

IF80-25 T¨�-

SO 1/2"-300 RF-

B WN 800-900 RF Sch80

B WN 1150-150 RF S=10

LWN 25-2500 FF S

WN 500(B)-25 FM

1 CFM 1400-0.25 δs=8

PL32(A)-6 RF b=3

47065.4 A621

HG/T20592 WN150(B)-25FMFRF Sch80.3( B=Srf80Sc0300-1.620δ0=16620δ0=18n8-113102mhg20