M.O.C. Carbon Steel with Buna ‘N’ / Viton Seals. SIZES 1”NB to 48” NB Pressure Rating # 150 to 1500 Specification API-6H. Application Sealing Leaks on onshore and Offshore Pipelines. PIPELINE LEAK REPAIR CLAMPSThe integrated seal of clamp is of Fluoro-eslastomer to resist reaction of petrochemicals and resist high temperature of welding.