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

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U-loop Compensator
General Technical Specification
U-loops shall be provided in piping system using elbows/ bends as per piping material
specification.
U-loops shall be in horizontal plane and loops for many pipes running in parallel may be
provided at same location parallel to each other.
Loops shall be in the same plane as the pipe route. However, in some cases, where
there may be obstruction due to other parallel pipes, U-loop plane may be raised to clear
the pipes by providing bends.
Loops in vertical plane can be provided in exceptional cases if horizontal loop is not
possible due to layout considerations. Provision shall be made in piping for draining of
condensate, venting, etc.
Bellow Compensator
Bellow type expansion joints shall be made from SS sheet and can be single or multi
layer with number of convolutions.
Loads due to Compensators
Loads on anchor points due to bellow compensators shall be considered based on the
feed back from supplier / manufacturer.
02.06. VALVES AND MEASURING DEVICES
Valves shall be provided on pipe work for isolation of pipe sections and equipment,
control of pressure, flow and level of fluids, venting, draining, pressure relief, etc. They
shall be suitable for the service conditions in all respects and located suitably
considering ease of operation and maintenance. Generally the following practice shall be
followed;
- Stop valves :
On all pipelines both at the sources and consumers also in the branch pipes to
individual buildings and shops with a nominal diameter of 100 mm and above (if
required, for smaller diameter as well).
- Isolating and by-pass valves for flow meters, filters, etc.
- Check valve on all pipelines requiring unidirectional flow.
- Quick action safety shut-off valve on fuel oil, gas/ air lines to furnaces and
heaters as well as before each consumer or group of consumers.
- Pressure regulating valves with isolating, by-pass and relief valves for all
pressure reducing installations.
- Manual drain valves at low points and manual vent valves at all high points of
pipe work.
- Regulating valves with integral pressure gauge for all oxygen outlet points, fuel
gas outlet, etc.
- All valves shall be provided with the operating handle/ lever/ wrench within easy
reach. Where necessary, operating platforms shall be provided. Valves located
in inaccessible locations such as basements, tunnels, etc. Shall have remote
actuation by means of electric motors, solenoids, etc.
Gases & Liquid Fluids
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GS-02