Pipe Lines

Excavation 

1. Before the excavation for pipe line trenches is commenced, mark the route of pipe  lines actually on the ground  and get the alignment and exact position for the laying of pipe lines/fittings, valves, valve chambers, washout etc, approved by the Engineer-in-Charge. 
2. Insist on all excavated earth being  kept  one metre away from the trenches. 
3. Ensure that the trenches  are excavated in perfect straight lengths, the angles being formed with square or easy bends. The curve of the bend must be  such that pipe does not require the application of undue force to adopt it to the curve. 
4. See that the bottom of trench is smoothly graded to provide support to the pipes. 
5. Before the pipes  are lowered into the trench, hollow  (grips and pockets) are to be cut in the bed to receive the socket or flanges to allow adequate room for making and caulking of joints. 
6. Get the soft spots in the bed of trench properly rammed, and in case of rock, get the bed levelled with  hard moorum as specified. 
7. Have the excavated trenches, checked by the Engineer-in-Charge land record this fact  with date in the Works Diary and the Works Passing Register. 
8. If there are any ordered deviations, those should be measured before starting to lay the pipe line. Get the measurements of trench  checked by the Engineer-in-Characterful  Manager.