pipe supports and restraints.ppt
TRANSCRIPT
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Pipe Suppor ts and Restraints
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Function of supports and restraints:
To carry load
To ensure that material is not stressed beyond a
safe limit
Holdup of liquid can occurred due to pipe sagging
(allow draining)
To permit thermal expansion
To withstand and dampen vibrational forces applied
to the piping
Piping comp onents: pipe supports and restraints
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Supports:
Absorb system weight
Reduce:
longitudinal pipe stress
pipe sag
end point reaction loads
Piping comp onents: pipe supports and restraints
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Restraints
Control, limit, redirect thermal movement
Reduce thermal stress
Reduce loads on equipment connections
Absorb imposed loads
Wind Earthquake
Slug flow
Water hammer
Flow induced-vibration
Piping comp onents: pipe supports and restraints
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Support and Restraint Selection Factors:
Weight load
Available attachment clearance
Availability of structural steel
Direction of loads and/or movement
Design temperature Vertical thermal movement at supports
Piping comp onents: pipe supports and restraints
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Piping components: pipe suppor ts and restra ints (r ig id supp ort)
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Piping components: pipe suppor ts and restra ints (hanger support)
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Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
Rigid hangers are normally used at locations where no vertical
movement of the piping occurs.
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Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
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Flexib le Suppo rts
Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
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Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
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Flexib le Suppo rts
Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
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Flexib le Suppo rts
Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
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Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
Pi i i d i (f l ib l )
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Piping com ponents: pipe supp orts and restra ints (f lexib le supp ort)
Pi i t i t d t i t ( h id )
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Anchor
Full fixation Permits very limited (if any) translation or
rotation
Guide
Permits movement along pipe axis
Prevents lateral movement
May permit pipe rotation
Piping com ponents: pipe sup ports and restra ints (ancho r, guide)
Pi i t i t d t i t (R t i t A h )
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Piping com ponents: pipe supp orts and restra ints (Restraints - Anch ors)
Pi i t i t d t i t (R t i t G id )
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Piping com ponents: pipe sup ports and restra ints (Restra ints - Guide)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Piping can be arranged
On piperacks
Near grade on sleeper
In trench
Near steelwork or equipment
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Pipeway:
Is the space allocated for routing several parallel
adjacent lines Group lines in pipeway
Piperack
Is a structure in the pipeway for carrying pipes andis usually fabricated from Steel, Concrete & steel,also provide protected location for ancillaryequipment (pump, utility station, )
Piperack shape termed tee-head support
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement / supp ort def in i t ion)
Pi i t i t d t i t (P i i d t t / t d f i i t i )
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Piperack consist:
Bent: Connected shape frame
Stanchion:
The vertical member of bents are
termed stanchion
Piperack arrangement:
Single deck
Double deck,
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement / supp ort def in i t ion)
Pi i t i t d t i t (P i i d t t )
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Arrangement of pipe on suppor t :
Usually 2 < NPS < 12 mounted on piperack and
larger pipes are mounted on sleeper
Mounted large diameter pipe near stanchion for
uniform distribution of load
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Pi i t i t d t i t (P i i d t t )
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Hot pipe usually insulated and mounted on shoes
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents pipe s pp orts and restra ints (Pip ing and s ppo rt arrangement)
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Other type of shoes
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Use bracket or outrigger for
Installation of electrical and instrument tray
Pipes with slope
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Group requiring expansion loop at one side ofthe pipe rack
Design hanger for 2 and larger pipe
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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For better stress distribution in the pipe wall,saddle used on large line and used for lines that
twist over when moving
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Provide guide for long straight pipes subject tothermal movement
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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The smallest size of pipe run on a piperack 2
If necessary, suspend pipe smaller 2 from 4 andlarger
For making horizontal branch, change height of pipe
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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The most economic beam section desired for thepiperack
If more room is needed, make double or triple piperack
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
20 -25 ft
> 6 ft
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Categorize piperack, for example if using double deck,place utility service piping on the upper level of thepiperack
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Utility service
process
Determine by lifting equipment required access
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Dont install pipe on stanchion, this will preventadding another deck
Consider sufficient space beside piperack
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
10 ft
Piping com ponents: p ipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Ensure that nozzles on equipment are free fromtransmitted by the piping
Equipment suppliers will state max. loadingpermissible at nozzles
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Dummy leg length
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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For line smaller than 2 and non-critical arrangesupports in the field
Pocketing of liquid due to sagging can be eliminatedby sloping the line so that the difference in heightbetween adjacent supports is at least equal to tripledeflection at the midpoint
As a rule of thumb, spans for insulated lines shouldbe reduced by approximately %30 from those foruninsulated pipes
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Support piping from overhead, in preference tounderneath
Install flange, with 12 minimum clearance fromsupporting steel
>12
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
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Keep weld joints at least 3 from supporting steel orother obstruction
To carry the weight of the piping use a FOS = 3
In general, one hanger or other support should bespecified for each side of a valve.
>2
Piping com ponents: pipe supp orts and restra ints (Pip ing and suppo rt arrangement)
http://rds.yahoo.com/S=96062883/K=pipe+support/v=2/l=IVI/*-http://www.battelle.org/pipetechnology/FLOWLOOP/figures/PipeSupport.jpg -
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Field support
For line smaller than 2 and non-critical, arrangesupports in the field
Finding location of support
Pip ing c omponents: p ipe supp or ts and rest ra in ts (p ip ing suppor t document )
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Pip ing c omponents: p ipe supp or ts and rest ra in ts (p ip ing suppor t document )
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Piping comp onents: pipe supports and restraints (pip ing sup port drawing)
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