... sell products to customers in pertroleum and gas fields. Following the principle of“Sincere Operation,Quality First and Customer Preferential ... flange,slip on flange,blind flange Material:carbon steel,stainless steel and alloy steel fange Standard:ANSI,JIS,BS,DIN,UNI, ... :Require Painting:yellow,black.oil and Zn Inspection:in-house and the third party High Quality Stainless Steel Special Forged Flange