... oil and gas pipe flange ,galvanized pipe flange ,hydraulic pipe flange 1. Type: oil and gas pipe flange,galvanized pipe flange,hydraulic pipe flange 2. Material ... , BS, DIN, UNI, EN, GB, AWWA, API, MSS,4. Size: 15 mm to 5000 mm5. Pressure: 150bls to 2500bls6. Marking: According ...