GB/T 9121.4-1988 English PDF
Basic dataStandard ID: GB/T 9121.4-1988 (GB/T9121.4-1988)Description (Translated English): Loose plate steel pipe flanges with weid-on collar with raised face for PN 2. 5MPa (25 bar) Sector / Industry: National Standard (Recommended) Date of Issue: 4/25/1988 |