GB/T 12459  弯头 DN 125-Ⅱ-Sch4090EL

DN 125-Ⅱ-Sch40 90EL

pl350(a)-6 rf b1=358

pl350-40 rf

WN 50(B)-25 RF S=≥7

BL150-6 RF

so100-16rf b1=91

BL 25-2500 RF

C-BL450-6RF6h8

so50(b)-600 rf

so50(B)-25m0r60=4 RF=8s RF B=433 B8frawsch4 RJfFkh1.6 B=Sch40Suot;-150 RF-150 RF SCH80S150 RF SCH40S