... Flanges are drilled (machined) with the wall thickness of the flange having the same dimensions of the matching pipe. The lighter ... : 150#, 300#,400 #,600#,900#, 1500# & 2500 #.StandardANSI : ANSI B16.5, ANSI B16.47, MSS SP44, ANSI B16.36, ANSI B16 ... , DIN2638, DIN2673B.S : BS4504 , BS4504, BS1560, BS10 Stainless Steel Blind Flange,Slip on Flange,ANSI B16.5