Riser Weld+Ends (Click for more Info) For easier replacement of underwater risers Replacement Without Underwater Welding Need a fast replacement riser? PLIDCO’s Riser Weld+Ends avoids underwater welding. It is socket-welded at the surface to the new replacement riser and lowered into the water. The diver cuts off the old riser, stabs the new fitting over the cut-off pipe, then torques the clamping and thrust screws for a complete leak-proof seal without welding. Our Riser Weld+Ends are designed to simplify the replacement of underwater riser on offshore oil and gas lines without welding underwater. The repair fitting has additional clamping and thrust screws to provide a seal for high pressure pipelines and for resisting extreme end-pull. Special installation instructions are necessary for thin wall applications. Standard Packing: Buna-N. - Viton, Silicone and other packings available upon request. Standard body materials: - ASTM A106 Gr. C or ASTM A105/A350 Gr. LF2 Options: - NACE MR0175/ISO 15156 compliant materials. - Marine epoxy paint for corrosion protection.