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 xxxx 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.

Jointing. The socket and spigot ends of the pipes shall be brushed and cleaned. The chamfered surface and When approaching the end of a drum length at least three coils shall be left in place when the spigot shall have stringing operations are stopped. These coils are to be coated removed carefully, and if another length is required to be run out, a joint shall be made as per the recommendations of the accessories manufacturer. Conductor splices shall not crack or otherwise be susceptible to damage during stringing operation. The Contractor shall use only such equipment/methods during conductor stringing which ensures complete compliance in this regard. All the joints on the conductor shall be of compression type, in accordance with a suitable lubricant recommended the recommendations of the manufacturer, for which all necessary tools and equipment like compressors, dies etc., shall be arranged by the manufacturer contractor. Each part 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 joint shall be inserted into the cleaned groove by wire brush till it is free of the socketrust or dirt, etc. It has to be checked for correct positioning. The two pipes This shall be aligned properly in the pipe trench and the spigot end shall be pushed axially into the socket either manually or greased with a suitable tool specially designed for the assembly of pipes and as anti-corrosive compound if recommended by the manufacturer, before the final compression is carried out with the compressors. The spigot has to be inserted up to All the insertion xxxx on the pipe spigot. Deflection of the Pipe at the Joints Deflection of the pipe, if any, joints or splices shall be made only after at least 30 meters away from the lengths have fully been assembledpole. No joints or splices shall be made in spans crossing over main roads, railway line and Small River spans. Not more than one joint per conductor per span shall be allowed. The deflection compression type fittings shall not exceed 75 be of the self centering type or care shall be taken to mark the conductors to indicate when the fitting is centered properly. During compression or splicing operation, the conductor shall be handled in such a manner as to prevent lateral or vertical bearing against the dies. After compressing the joint, the Aluminium sleeve shall have all corners rounded; burrs and sharp edges removed and smoothened. To avoid any damage to the joint, the contractor shall use a suitable protector for mid span compression joints in case they are to be passed over pulley blocks/aerial rollers. The pulley groove size shall be such that the joint along with protection can be passed over it smoothly. In case of ACSR conductors the filler compound should be used during compression. In case AAAC is used each press should over lap 25% 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 blocksprevious press.