Common use of Jointing Clause in Contracts

Jointing. The socket and spigot ends of the pipes shall be brushed and cleaned. The chamfered surface and the end of the spigot shall have to be coated with a suitable lubricant recommended by the manufacturer of the pipes. Oil, petroleum bound oils, grease or other material which may damage the rubber gasket shall not be used as lubricant. The rubber gasket shall be inserted into the cleaned groove of the socket. It has to be checked for correct positioning. The two pipes shall be aligned properly in the pipe trench and the spigot end shall be pushed axially into the socket either manually or with a suitable tool specially designed for the assembly of pipes and as recommended by the manufacturer. The spigot has to be inserted up to the insertion ▇▇▇▇ on the pipe spigot. Deflection of the Pipe at the Joints Deflection of the pipe, if any, shall be made only after the lengths have fully been assembled. The deflection shall not exceed 75 % of the values recommended by the pipe manufacturer. Anchoring of the Pipeline Thrust blocks shall be provided at each bend, tee, taper, end piece to prevent undue movements of the pipeline under pressure. They shall be constructed as per design of the Employer’s Representative according to the highest pressure during operation or testing of the pipes, the safe bearing pressure of the surrounding soil and the friction coefficient of the soil. This item shall be separately payable as per the provisions under BOQ. Measurement and Payment The net length of pipes as laid or fixed shall be measured in running meters correct to a cm including the length of specials. The portion of the pipe at the joints (inside the joints) shall not be included in the length of pipe work. Payment for supply and laying, jointing shall be on length basis as measured above, and as stated below Thrust, Anti-floatation and Anchor Blocks The Contractor shall construct thrust, anti-floatation and anchor blocks, as per the enclosed drawing or as and where directed by the Employer’s Representative as an acceptable means of pipe restraint. Plain concrete of Class M 15 shall be used for such blocks.