TENDER DOCUMENT FOR SUPPLY INSTALLATION & COMMISSIONING OF DAIRY EQUIPMENTS

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1) The surface of the pipe to be insulated should be properly cleaned.
2) Hot bitumen should be applied uniformly @ 1.5 kg. per sq. mm. on the surface
of the pipe.
3) A similar layer of bitumen should be applied on the inner surface and on the
edges of the insulation section.
4) The sections should then be stuck to the coated pipe with joints staggered.
Adjacent sections should be tightly pressed together.
5) All joints should be properly sealed with bitumen.
6) A thick vapour seal of hot bitumen @ 2.5 kg per sq. mm. should be applied
uniformly on the outer surface of the pipe sections and allowed to dry.
7) The chilled water and Glycol lines, after insulation must then be covered with
22 gauge aluminium sheet with proper grooves and overlaps and secured in
position with 12 mm. self tapping Parker screws.
8) In case the insulation sweats or the specified/required insulation properties are
not attained, the entire insulation in such region shall be redone with fresh
material, entirely by the erector at his own cost.
50.2 Insulation of Steam condensate & Hot water pipe lines :
All the steam and hot water pipes shall be insulated with 50 mm. thick mineral
wool or equivalent. The insulation shall be carried out in the following manner:
1) Cleaning of surface to be insulated. Applying a coat of red oxide primer and
fixing glass wool/mineral wool of suitable thickness tightly to the pipe, butting
all joints to be tied with lacking wire.
2) The insulation should be covered with GI wire netting.
3) The steam and hot water lines, after insulation must be covered with 22 gauge
aluminium sheet with proper grooves and overlaps and secured in position with
12 mm. self tapping Parker screws.
4) In case the insulation does not have the desired insulation properties, the entire
insulation will have to be redone at the erector‟s cost to give the desired results.
5) In case of condensate return piping, all the steps mentioned above shall be
executed except that the thickness of insulation shall be 30 mm.
50.3 Insulation of chilled water tank (if specified in the Purchase Order) :
a) The surface is cleaned with the help of brushes to remove any loose particles.
(Signed & sealed by the tenderer
in token of acceptance of above)
(RCDF)
Jaipur