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Unformatted text preview: f joint with mortar. This
is allowed only upto working pressure of 3 kg/cm2.
11.1 Unless specified otherwise, jointa between pipes
shall be of the spigot and socket type, so manufactured, that when fitted with the correct $ize rubber Non-pressure pipes for drainage, sewerage and culverts, shall be tested for 0.14 N/mm2.
7 IS 784:2001
13.3 Permeability 13.6 Repair of Core and Coat Test on Coating Pipes not satisfying any of the tests, which may be
arising due to occasional imperfection in manufacture or damages during handling, may be treated /
repaired and shall be accepted if they satis~ the tests.
The curing of the repaired concrete or mortar maybe
done using curing compound. The drop of water level, in the specimens of pipes selected, when tested according to the method described
in IS 3597 shall not exceed 2 cm3 at the end of two
hours and the final permeability between fourth and
fifth hour shall not exceed 0.3 cm3. When a higher result is obtained, the test shall be repeated on twice the
number of pipes originally tested and the lot shall be
accepted, if all pipes pass the test. Where retest is not
satisfactory, all pipes from that lot may be tested individually and only those with satisfactory results shall
be accepted. No additional treatment of any type shall
be allowed on the pipe before permeability testis done. 14
ACCEPTANCE CRITERIA FOR 14.1 Pressure Pipes for Water Supply and Sewerage Basic requirement, unless the design proving and
manufacturing process test in 13.1 is satisfactorily
carried out, no acceptance tests shall be undertaken.
This has to be done for every new diameter of pipe
and for one pressure. The criteria for acceptance is the final permeability.
The test shall be done immediately after the
hydrostatic factory test. In case this is done later, the
pipe shall be kept wet for 48 hours prior to test. All the pipes manufactured under relatively similar
conditions in respect of raw-materials and processing
operation, shall be grouped together to constitute a lot. 13.4 Three Edge Bearing Test (for Pipes for Drainage, Sewerage AND and Culverts) Pipes designed for drainage, sewerage and culverts when
subjected to three edge bearing test in accordance with
IS 3597 shall meet the requirement as given in Table 2. Each lot shall be taken separately for sampling and
evaluation, for conformity to the requirements of this
standard, if the conditions mentioned in 5.1, 5.2,5.3,
11.1, 11.2 and 12.2 are satisfied (even after repairs).
Scale of sampling shall be as given in Table 3. 13.5 Dimensional Characteristic
The pipe selected shall be checked for conformity to
the dimensional requirements as given below: 14.2 For non pressure pipes for drainage, sewerage
and culvert, only permeability test from Table 3
besides dimensions and three edge load bearing test
is necessary. a) Socket and spigot diameters of the pipes as given
b) Dimensional requirements as given in 5. Table 2 Three Edge Bearing Test Loads...
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This document was uploaded on 10/01/2013.
- Fall '13