BID Document for Guest House with Boundary Wall.pdf - Integrated ...

All valves shall be provided with cap / hand lever / hand wheel as required within easy reach. Wherever
necessary operating platforms shall be provided. In general, valves installed underground shall have caps and
those fitted above ground shall be operable by hand wheels.
4.0 Bends And Fittings
Pipelines shall be laid in straight lines with gradual changes being taken up at the joints as approved by the
manufacturers / and or relevant IS code as desired E.I.C. Where a sudden change of direction cannot be
avoided bends shall be used. The location of bends tees, and other fittings shall be determined in the field in
close cooperation with the Engineer-In-Charge.
5.0 Blind Ends
All pipe ends that shall be connected to future extensions, plugs, caps or blank flanges shall be installed and
secured in place.
6.0 Valve Chambers
Valves on an underground pipeline shall be located in a Masonry chamber with Pre cast RCC slab in three
pieces consisting of edge protection M.S. structural angle L40 x 40 x 6 mm weighing not less than 3.50 kg/m,
fitted & fixed along the all corners with necessary welding of the angles and reinforcement steel as per
approved drawing and direction of the Engineer-In-Charge.
7.0 Existing Road Crossing
The Contractor shall programmed the work to reduce disruption to road traffic to a minimum, and before any
work commences in existing roads shall:
i) Obtain full permission and approval of EIC, serving notice of intent to start work as may be
necessary and observing all the Project area rules and regulations.
ii) Submit details of his proposals, and obtain approval from the Engineer-In-Charge.
iii) Suitable signs indicating that a street is closed and suitable detour signs for proper maintenance to
traffic shall be provided.
iv) Wherever necessary contractor shall make alternate routes for Project work’s traffic diversion as
directed by the concerned authority.
v) The bedding for the pipelines to be laid under the road crossing shall be in accordance with the
relevant drawings as per direction of the Engineer-In-Charge.
vi) The road way shall be reinstated to the satisfaction of EIC.
8.0 Hydraulic Testing:
Hydraulic Testing of Ductile Iron/MS/CI pipes:
All pipelines and all works shall be subject to pressure and leakage tests after being laid and installed before
commissioning.
Pressure and leakage tests shall be carried out simultaneously.
Provisions of this clause shall be read in conjunction with the provisions for testing of pipes under IS: 3114,
IS: 12288 & IS: 5822 and other Indian Standard Specifications as applicable.
The field test pressure to be applied shall not be less than the greatest of the following subject to a maximum
limit of field hydrostatic test pressure as per IS:12288:1987, IS:3114 & IS:5822 and other Indian Standard
Specifications as applicable.
(i) Maximum sustained operating pressure
(ii) Maximum static pressure plus 5 N/mm 2
(iii) Sum of the maximum sustained operating pressure (or the maximum static pressure) and the
maximum calculated surge pressure.
The pipeline shall be filled slowly from the lowest point in such a manner as to allow expulsion of air through
air release valves at highest points. The following filling rates are recommended:
Size, mm: 100 150 200 250 300 400 500 600 700 800 900 1000
Filling rate,
Ltr/sec 0.3 0.7 2.5 2.0 3.0 6.0 9.0 14.0 19.0 25.0 32.0 40.0
After filling, the pipeline shall be pressurized to the specified operating pressure and left for a period of time
to achieve stable conditions. The pipeline shall then be pressurized up to the full test pressure and the section
under test completely closed off. Care shall be taken to ensure that the pipeline is free of air. For this,
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