4 General Technical Specification of Bhilai Steel Plant, SAIL ...

© 2007 MECON Limited
All rights reserved
General Technical Specification
c) Installation of gas pipes with air pipes to gas consumer units is allowed to be laid
in channels.
d) Channels with gas pipes should not cross other channels, In case, it is
unavoidable, air tight tie-plate should be made and gas pipe should be placed in
casing. Ends of casing should be taken out beyond the limit of tie-plate by 300
mm at both ends.
e) Channels should have provisions for natural ventilation.
12. Gas pipes in buildings should be located at places convenient for servicing,
inspection and repair. It is not allowed to lay gas pipes at places where there are
chances of damage due to shop transport.
13. For gas lines installed in hot zone, it is recommended to provide protection
against overheating of gas pipes.
14. It is allowed to fasten gas pipes to frames of furnaces, boilers and other units
provided these frames are checked for strength by calculations.
15. Gas pipes are not allowed to pass through buildings producing or having
materials liable to explode or burn and building of power distributing devices and
substations and ventilation chambers and through buildings, in which gas pipe
may be damaged by intensive corrosion.
16. Gas pipes should not cross ventilation doors, air exhauster, flue pipes and also
gas pipes should not be installed in insufficiently ventilated space and in
underground buildings.
17. Installation of high pressure gas pipes below main working platforms of shops is
not permitted.
18. Gas pipes along bridges should be made of seamless pipe and laid in the open
at a horizontal distance of one metre from ends of pavements for passing of
people and it should be within reach for servicing. Supporting elements of the
bridge should be accordingly checked for loads from gas pipes. Laying of gas
pipes in channels of bridges is not allowed. All welding joints of gas pipes in the
area of their attachment to bridge should be radiographed.
19. Gas pipes passing through walls, ceilings, and other structures of buildings of
construction shall be encased in a steel pipe having inside dia at least 50 mm
more than that of the oxygen pipe. The Gas pipe shall have no joints in the
section at such crossings. The gap between the gas pipe and the outer pipe
shall be filled with non/inflammable material, but allowing vertical and horizontal
movement.
20. The laying of moist fuel gas pipelines shall be as per IPPS: 1-06-014-95
21 Pressure pipe work for gases and liquid fuels generally shall be routed
overhead. All overhead interplant pipe work to be routed such that they will have
a minimum clearance of 6.0m between bottom of supporting structures / pipes
and road / railway track. The pipelines laid over hot tracks shall have a minimum
clearance of 10.0m. In case, protective shields are used in these places, this
clearance may be reduced to 6.0m. Buried pipes, wherever laid, shall be
provided with a minimum earth covering of 1200mm in areas subject to
Gases & Liquid Fluids
Page 3 of 51
GS-02