PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
PACKAGE : I Bid Document VOLUME : II - Public Health Engineering
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After satisfactory test, the contractor shall remove water from the pipeline and clean<br />
it after testing at his own cost, without flooding adjoining areas.<br />
Duration of Hydraulic Test:<br />
The test is for 1 hour only. The rate of allowable leakage is given on per day basis.<br />
The leakage observed within one hour shall be converted to per day basis and<br />
compared with criteria given.<br />
Maximum field test pressure for pipes with flexible joints:<br />
Table : 1 on page 11 of IS:12288 wherever is applicable.<br />
11.8 Interconnection work.<br />
The interconnection work between the existing main and the proposed main to be<br />
laid under this contract shall proceed from the new main to the existing main.<br />
Before actually proceeding with the interconnection work, the Contractor shall<br />
make ready necessary tools and plants required for the work at site, such as pump<br />
sets, shoring materials etc. He shall also keep ready at site necessary pipes, jointing<br />
materials, specials and valves required for the work. The Contractor shall keep<br />
necessary skilled workmen of sufficient strength at site and once the work<br />
commenced, the entire interconnection work shall proceed without interruption by<br />
engaging labour for carrying out the work on a continuous basis both day and night<br />
till the work is completed. The work shall be executed as per programme drawn up<br />
by the Engineer and shall be completed within the time ordered by the Engineer, for<br />
each individual interconnection. The work shall be carried out under the direction<br />
of the Engineer from the beginning to end.<br />
Laying of specials, valves (except straight pipes from the branch of the new main to<br />
the connecting point in the existing main) including conveying specials etc. from<br />
the stores or site of stacking, excavating, timbering, pumping out water from the<br />
trenches, lowering, aligning, jointing specials and valves, cutting the existing mains,<br />
dealing with water, inserting the necessary branches, jointing, testing, refilling etc.<br />
is included in the item of providing, laying and jointing DI/MS pipes. Any ancillary<br />
work either of Temporary or Permanent nature required for interconnection and not<br />
covered by schedules shall be executed by the Contractor at no extra cost.<br />
GTS : General Technical specification. Page 90
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