Shallow trench C-900 Pipeline restraint
Shallow trench C-900 Pipeline restraint
(OP)
Hello to all and TIA.
I have an application for a temporary pipeline of C-900 PVC pipe. The run is 1300 ft long, the trench is three ft deep the back fill WILL NOT be compacted as it needs to be removed. Should I require the contractor to restrain all the joints?
I have an application for a temporary pipeline of C-900 PVC pipe. The run is 1300 ft long, the trench is three ft deep the back fill WILL NOT be compacted as it needs to be removed. Should I require the contractor to restrain all the joints?





RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
There is a potential of a higher than normal flow and velocity in the pipe. Therefore due to this and water hammer it was decided that we should restrain all the joints
RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
RE: Shallow trench C-900 Pipeline restraint
Don't bother with calculating the required restrained length because with uncompacted backfill there won't be enough skin-friction to count on; restrain every joint. For a pipeline that's only 1300-ft long the incremental project cost of restraining every joint will be insignificant.
DIPRA (Ductile Iron Pipe Research Association) distributes a free thrust restraint program, and a very nice pamphlet on this topic - the principles of thrust restraint are basically the same for PVC and ductile iron.