scope of work - Vizag Steel

Work Desc :
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SCOPE OF WORK TENDER NO :
TENDER No : 72211-0
Common shutdown jobs, Capital repair jobs and Maintenance of Heat
Exchangers in Utilities Department of VISAKHAPATNAM Steel Plant
Removal of the existing valve and keeping at designated location
Fixing the serviced valve in position & testing for leak tightness
1.4 Scope of work for erection of new copper pipes at PRS-I (Item no.6
of BOQ)
a) Preparatory arrangements to be done before starting of the job as per
the directions of VSP Engineer
b) Obtain work permit / shut down & drop the quick shut off valve,
Pressure control valve, vent lines etc and the existing copper pipe
carefully & place them at the location shown by VSP Engineer.
c) The down stream & upstream flanges are to be isolated from the
process as well as electrically by fixing the 350 NB cl-600 dummies, if
required.
d) The pipes are to be cut by grinding wheel/plasma cutting machine
at the location shown by VSP Engineer. Plasma cutting machine may be
supplied by VSP free of cost, de-pending upon availability.
e) The pipe edges are to be prepared for high pressure pipe welding
of radiography quality.
f) The new pipe pieces along with flanges are to be tack welded by TIG
welding.
g) After matching of the flange holes with new pipe flanges, full
welding of the joints to be carried out by TIG welding.
h) The pipes are to be cleaned for oxygen service.
i) The valves, pipes, quick shut off valve, pressure control valve are to
be degreased & fixed.
j) The downstream & upstream valve flanges are to be tightened.
k) The vent lines are to be fixed back.
l) Then leak checking and rectification, radiography are to be carried
out.
m) Other than DC welding machine, equipment, consumables, DP test kit
required for TIG welding is in VSP's scope.
n) TIG welding & radiography is to be measured separately.
1.5 Scope of work for oxygen service cleaning & degreasing of seamless
piping size: 250 NB (item no.7 of BOQ)
a) Each pipe length / pipe fitting is transported to cleaning site. To be
cleaned thoroughly by brush/cloth and blown with ompressed air.
b) The pipe length / fitting is to be taken to steam tapping point and
to be cleaned it's internal & external surfaces thoroughly with steam.
c) After steam cleaning, it shall be dried with nitrogen for atleast
30minutes and offered for inspection.
d) Degreasing of pipe internal shall be done by CTC using polyester
cloth only & then blown with nitrogen for atleast 30 minutes.
14 of 39 Signature of the Tenderer