... , 321H, Rst37.2, C22.8 OD: up to 5,500mmType: Socket-weld,Welding neck,Slip on etcUsed in:Oil Field, Offshore ... Forging, Shaft ForgingSpecial design availableMarking: according to customers' requirement Production with anneal solution for stainless performancePerfect Quality, On Time Delivery! Flange