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PIPING
Design, Stress Analysis and Detailing
INTRODUCTION
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Introduction:Piping is used in industry, home and vehicles for
conveying
fluids and heat transfer. Pipes are also known as tubes.
Piping
is the arteries and veins of industry. Piping may be used
for
architectural and ornament purpose also. In the present
context, we are discussing the industrial application of
piping.
Piping is used from time immemorial. Piping design can be
understood from performance and strength points of view.
Theperformance requirements of piping are dictated by the
process
designer. The strength considerations of piping include
material
selection, loads calculation, thickness selection and
supports.
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PIPING
Functions of Piping
Convey Fluids
Transfer Heat
Structural use
Architectural use
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Basic of Piping:
Design of piping used for conveying fluid andfor heat transfer
are different. Design, stress
analysis and drafting of piping require
knowledge of Applied Mechanics, Mechanics
of Materials, Materials Science and ComputerApplication.
PIPING
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PIPING
Mediums Handled
Liquids
Gases
Liquid & gas mixtures
Liquid & solid mixtures
Gas & solid mixtures
Gas, liquid & solid Mixtures
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PIPING
Difference between Pipe & Tube
Pipe is a large tube
Tube is a small pipe
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PIPING
Why Pipe is Hollow Circular?
Plumbers answer
Hollow Circular Pipes are used due toavailability
Engineers answer
Hollow Circular Pipes are used due to
economy
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PIPING
Materials
Ferrous materials are widely used.
Non-ferrous metals have niche application
Non-metallic material are used in non-
critical applications
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PIPING
Layout
Functional requirements
Safety requirements
Economic requirements
Ergonomic requirements
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POWER CYCLE PIPINGS:
Boiler integral piping.
PIPING
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Boiler integral piping
Downcomers.
Inter connecting piping between headers.Boiler feed line from
feed stop valve to economiser inlet.
Blowdown lines from boiler drum to blow down valveincluding
downstream isolating valve.
boiler soot blowing steam lines.
boiler drains to blowdown header super heater drain headerdrain
and drain fromabove headers upto and including firstisolation
valve.
blow down lines from down stream isolating valve of blowdown
valve upto blowdown vessel.
boiler drain header from downstream of the first isolating
valve upto blow down vessel.
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Turbine integral piping:
Lub oil pipng for turbine and generator.
control piping for valves.
Turbine water drainage piping.Seal steam piping
PIPING
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TG piping :
Extraction steam piping to heaters
condensate extraction pump suction lineand discharge line.
Heater drain lines and vent lines.
Flash tank vents and drains tocondenser.
Boiler feed discharge between heaters.
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Boiler Feed pump piping :
Boiler feed suction line
Boiler feed pump recirculation
Balance leak off line
Warm up piping.
PIPING
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TG PACKAGE LP PIPING :
BCW PIPING FOR TG AUXILIARIES.
RAW WATER PIPING
DM WATER PIPINGSERVICE AIR AND INSTRUMENT AIR
PIPING.
PIPING
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Miscellaneous piping :
Fuel oil supply and return lines from fueloil pump house to
boiler front
BCW piping
RAPH wash water & firefighting,systempiping
Service air and instrument piping.
Chemical dosing piping.
PIPING
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LP piping :
Circulating water piping Fire water piping
Drinking water piping
Fuel oil piping
Raw water piping.
PIPING
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Conditions for purview of IBR :
The pressure at which steam or feedwater passes through such
pipe
exceeds 3.4 Kg/cm^2 gauge (or)
Such pipe exceeds 254 mm in internaldiameter.
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PIPING
PIPING FLEXIBILITY
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Emprical formula for finding flexibility of thesystem having
only two terminal points andpipe of uniform size.
U
l
D-------- 208.3(L U)2
D = Outside dia of pipe
= Resultant expansion in mm
L = Developed length of line
axis between anchors (m)U = Anchor distance (m).
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PIPING
