Integral flange 1,Material: Stainless Steel, Carbon Steel, Alloy Steel 2, ... : From1/8" to 64" 3,Standard: ANSI,DIN,BS etc. Integral flange Production standard: GB/T9112~9124-2000 JB/T81-94 ... .0 Class: 150LB 300LB 600LB 900LB 1500LB 2500LB Classification of type: 1,PL SO WN SW TH PJ/RJ PJ/SE ... with polyethylene film steel cases or as customer’s request. Integral flange