Pipe Laying Sample Clauses

Pipe Laying. 1 Carefully lower pipe into the trench. Do not drop or dump materials into the trench. .2 Lay and join pipes, fittings and valves as specified herein and according to manufacturer's published instructions. .3 Lay pipe and fittings on prepared bed, true to line and grade indicated, within following tolerances: .1 Horizontal Alignment: 50 mm. .2 Vertical Alignment: the lesser of 12 mm or one half the rise per pipe length. .4 Commence laying at outlet and proceed in upstream direction with bell ends of pipe facing upgrade. .5 Prevent entry of bedding material, water or other foreign matter into pipe. Use temporary water-tight bulkheads when pipe laying is not in progress.