Specifications Part 1 - Water Supply, Sewerage and Tube Well Works

3.12.3.1 Flanged joints find their application in vertical inlet and outlet of pipes of overhead reservoir, suction pipes of pump where perfectly air tight joint is requiredto avoid air being sucked in and also where there are vibrations. Flangedjointing is extensively employed for outside work.3.12.3.2 Overhead pipe lines and also for connection in vertical and confined positions,but are usually not employed for pipe line work below ground like gravity mainsetc. Flange joints are expensive and are thus only used for indoor work andunder other situations requiring the use of flanged joints as mentioned above.3.13 MeasurementThe net length of pipes as laid or fixed should be measured in running meterscorrect to a cm. specials should be excluded and enumerated and paidseparately. The portion of the pipe within the collar at the joints should not beincluded in the length of pipe work.3.14 RatesThe rate shall include the cast of the material and labour involved in all theoperation described in the item.Urban Administration & Development Department Page 41