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Idea Transcript
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Thrust Block Supports PE pipes and fittings joined by butt welding, electrofusion, or other end load bearing joint system do not normally require anchorage to withstand loads arising from internal pressure and flow. For joint types which do not resist end loads, plus fabricated fittings which incorporate welded PE pipe segments, anchorage support must be provided in order to prevent joint or fitting failure. In addition, appurtenances such as valves, should be independently supported in order to prevent excessive shear loads being transferred to the PE pipe. Static Pressure Thrust
2PA . sin φ .10-3 R= 2 where R = resultant thrust (kN)
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Velocity (Kinetic) Thrust
n
The figures in the table below are for horizontal thrusts, and may be doubled for downward acting vertical thrusts. For upward acting vertical thrusts, the weight of the thrust block must counteract the developed loads.
The velocity or kinetic thrust applies only at changes of direction.