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The supplier shall give the S.O fourteen (14) days notice in writing of date on which any of the samples will be ready for testing or inspection at the place of manufacture or at an approved laboratory.

The S.O shall attend the appointed place within the said fourteen days or the test may proceed in his absence.

The supplier shall in any case submit to the S.O within seven days three certified copies of the test readings.

5.11.2 Routine Tests

For routine tests, the S.O or his representatives shall have access at all reasonable times for inspection and testing of the pipes being ordered by SAJH. The manufacturer at his own expense, supply and maintain in proper condition all necessary dimensional gauges, prepare the necessary test pieces, appliances and supply labour for test specified.

All tests shall be done prior to delivery.

5.11.3 Type Tests

The supplier shall either provide the necessary facilities and a qualified chemists to carry out their test at the factory or retain the services of an independent testing authority approved by the client.

Copies or Type Test Certificates shall be submitted to the S.O for inspection. All expenses incurred in carrying the Type Tests at the factory or by an independent testing authority shall be borne by the Supplier.

The S.O reserves the right to collect test samples from the factory forward to an independent testing authority for test. The costs of such additional tests shall be borne by the Supplier.

5.11.4 Sampling

The number of sample to be tested by the Supplier at his own expense shall be selected in proportion to the number of pipes each size and class of production within the same day of 24 hours.

Test shall be carried out not earlier than 15 hours after the pipes have been extruded.

The proportions described are as Table 5.3.

Table 5.3 – Testing Proportion

Tests Proportion Routine Test Heat reversion Resistance to Acetone Short-term Hydraulic Impact Strength @ 20° C Type Test

Resistance to Sulphuric Acid Impact Strength of 0 deg. C Opacity

Effect on Water Long-term Hydraulic

Not less than 1 sample per 50 pipes from production within same day 24 hours

-Ditto- -Ditto- -Ditto-

One complete test each once a year for each Formulation used, or whenever a change is made in the formulation or method of manufacture of the pipes whichever is move often.

5.12 Routine Tests

5.12.1 Heat Reversion Test on uPVC Pipes

Heat Reversion Test shall carried out as described in Appendix ‘A’ to MS 628:1982. The change in the length of the sample between the scribed mark shall nor exceed 5.0 percent and the sample after testing shall show no faults such as cracks, cavities or blisters. A specimen shall be taken from each machine at least once in every 8 hours running, and shall meet the requirement specified.

5.12.2 Resistance to Acetone Test on uPVC Pipes

Resistance to Acetone Test shall be carried out as described in Appendix ‘B’ to MS 628:1982. The sample shall show no declamination or disintegration. Flattening and/or swelling of the sample shall not be deemed to constitute failure. A specimen shall be taken from each machine at least once in every 8 hours running and shall meet the requirements.

5.12.3 Factory Hydrostatic Test on uPVC Pipes

When tested by the method described in Appendix ‘G’ to MS 628:1982 the pipes shall withstand the appropriate Factory Hydrostatic Test pressure for at least 1 hour without failure as shown in Table 5.4.

Table 5.4 – Factory Hydrostatic Test Pressure

Class Nominal size of pipes Min. 1 hr interval Factory Hydrostatic Test Pressure

(bar) C D E All sizes All sizes All sizes 32.4 43.2 54.0

One specimen shall be taken at random from each machine at least once every 8 hours running or once in every 300 metres run, whichever is the greater quantity of pipe and shall meet the requirement.

5.12.4 Impact Strength Test at 20 degrees C on uPVC Pipes.

Impact Strength Test at 20 degrees C shall be carried out as described in Appendix ‘F’ to MS 628:1982.

SPECIFICATION FOR PIPEWORKS 60

Initially, sufficient specimens shall be taken at random from each machine so that at least one is taken per shift and at least 14 strikes made per extrusion run. If no specimen fails (defined as fracturing or cracking through its complete wall thickness), no further test specimens need to be taken. If of the initial 14

strikes, one, two or three specimens fail, further specimens shall be taken at random and tested to ensure a total of at least 42 strikes. If during the test, more than four specimens fail the test shall be discontinued.

A batch is defined as a continuous extrusion run of one size and class of pipe from one extrusion compound up to a maximum of 8 hours duration.

If the first 14 strikes cause no failure fracturing or cracking the pipes represented by the specimen shall be deemed to comply with the specification. If the first 14 strikes cause four or more failure the pipes represented by the specimens shall be deemed not to comply with the specification.

If because of one, two or three failure, it is found necessary to increase the number of strikes to 42, the pipes represented by the specimens shall be deemed not to comply with this specification if out of the 42 strikes five or more failures occur.