Marking and Sampling

MARKING

After manufacturing process, all pipes are marked and dated from permanent marker. Supervisor record all these marked numbers in front of tagged numbers and after wards these are stored in computer by date and marked number wise with the weight of cages.

RANDOM TEST PIPES

The curved pipes are randomly selected and tested on the testing machines. The pipes undergo the following tests in accordance with IS 458:2003. Three Edge Bearing Test, Hydrostatic Test and Permeability Test.

SAMPLING AND INSPECTION

In any consignment, all the pipes of same class, same size and belonging to the same mix of concrete shall be grouped together to constitute a lot, For ascertaining the conformity of the material to the requirements of these specifications, samples shall be tested from each lot separately. As per IS 458:2003,Table No 22-

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