... Delivery Time 3.OEM Provided 4.Sales Service Steel and Stainless Steel Forged Flanges1. Material: Steel, Stainless Steel according to ASTM, DIN,JIS, EN, ISO ... , GB standards2. Process: Casting, Machining,Assembly and Surface treatment ... according to customers' required.6. Certificate: ISO9001 Steel and Stainless Steel Flanges