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DESIGN SHEET FOR OFFSITE PIPE RACK

Rev.NO. Date Purpose Prepared by Checked by Approved by

< DESIGN SHEET FOR OFFSITE PIPE RACK >

GUIDE No.

Format No. EIL 1641-1919 Rev. 1 Copyright EIL – All rights reserved

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1.0 Check list

SR NO. LOADING/INFORMATION

i) PIPING

(√) / (X)

a) Pipe Rack layoutb) Cross Sections and Locationc) Width and Spand) Portal Spacinge) Tier Elevationsf) Longitudinal beam Elevationse) Requirement of intermediate beamsf) Equipment placed on rackg) Monorailsh)i)j)k)l)m)n)o)p)q)r)

ii) Electricaliii)

iv) Capacity of monorails if any

Rotating Eqpt.

< DESIGN SHEET FOR OFFSITE PIPE RACK >

GUIDE No.

Please ensure that the following design input data are available before proceeding for design.

TO BE FURNISHED BY

EQUIPMENT LAYOUT +GAD'S +CIVIL INFORMATIONINFORMATION DRAWINGS

FURNISHED/NOT FURNISHED

Space allocation for Electrical and Instrument trays/ductsTransfer line size,schedule,insulation thickness,location,elevation,location and Flare and O/H vapour line sizes,schedule,insulation thickness,location Location and size of platforms for equipments supported on pipe rackAir fin cooler floor(if required to be in RCC construction in place of steel grating based Requirement of additional metal insertsSize, schedule,insulation thickness,location and elevation of pipes above 30'' dia to be Load category giving udl for each pipe rack and tier.The dia of largest pipe including insulation thickness if it is more than 10m for Size, schedule,insulation thickness,location and elevation of cooling tower lines if Piping and platform arrangement at battery limit.Electrical requirment of cable trees and

tiers,platforms ladders,stairs,etc.Instrumentation requirement of cable ducts,platformsladders,stairs,etc.

Instrum --entation

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1.0 INTRODUCTION

1.0 This document presents the design for offsite pipe rack.

2.0 N-S GRIDSE-W GRIDS

2.0 STRUCTURAL DISCRIPTION

1.0 TRANSVERSE FRAME SPACING =

2.0 NO. OF BAYS =

3.0 NO.OF TIERS =

4.0 TIER ELEVATIONS =

5.0 INSTRUMENT TRAYS (NOS & ELEVATIONS) =

6.0 ELECTRICAL TRAYS (NOS & ELEVATIONS) =

7.0 WALKWAY LEVEL (NOS & ELEVATIONS) =

8.0 EQUIPMENT PPLATFORM LEVEL =

9.0 STAIR CASE =

10.0 EXPANSION JOINT

i) LOCATION =

ii) PROVISION OF FUTURE BRACKETS =

11.0 BRACED BAYS

NOS =LOCATION =

< DESIGN SHEET FOR OFFSITE PIPE RACK >

GUIDE No.

LENGTH OF PIPE RACK PORTAL SPACING(AS PER LAYOUT) 6M/8M 6M/8M8M/10M 8M10M/12M 8M12M/14M/16M 8M

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1.0 BASIC DESIGN INPUT /DATA

1.1 METEOROLOGICAL DATA

SEISMIC ZONE :

WIND(BASIC DESIGN WIND SPEED,TERRAIN CATEGORY) :

1.2 PLANT ELEVATIONS

HIGH PAVING POINT HPP :FINISHED GROUND LEVEL FGL :NATURAL GROUND LEVEL NGL :

1.3 SOIL/PILE DATA (REFER GEOTECHNICAL REPORT DOC NO.XXXXXXXXXXXXXXXXXXXXXXXX)

2.0 MAERIAL DATA

: 250 MPA

High strength Bolts : Property Class-8.8Ordinary Bolts : Property Class-4.6

:

Modulus of elasticity of Reinforcement Steel : 200000 MPA(Refer Clause 38.1 of IS 456)

Concrete

Sub Structures & Superstructure fck : 30 MPADensity of RCC : 25 kn /m3Density of PCC : 24

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GUIDE No.

STRUCTURAL STEEL (CONFORMING TO IS 2062):

fy

BOLTS ( as per IS 1367)

Reinforcement bar (Conforming to IS 1786 ) HYSD TMT steel bars of Grade Fe 500

Es

yconcyconc kn /m3

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< DESIGN SHEET FOR OFFSITE PIPE RACK >

GUIDE No.

Modulous of Elasticity of Concrete : MPA(Refer clause 6.2.3.1 of IS 456)

Anchor Bolts :

Friction CoefficientConcrete to Soil : 0.5

Esc 5000√fck

Bolts shall be turned from mild steel rounds conforming to IS 2062 grade-A

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1.0 Design Considerations/ Philosophy

Important Elevations

Ground Water table elevation GWT :Bottom of Steel Column Elevation BOPC :Foundation depth below HPP :Bottom of Foundation Elevation BOF :

2.0 Framing Arrangement

Transverse Frame : Moment Connected Structural Steel frames

Longitudinal frame : Braced

: Fixed

Steel beams in transverse direction : FixedSteel beams in longitudinal direction : Pinned

Braced bay in longitudinal frame :

Secondary beams : Pinned

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GUIDE No.

Vertical and Plan Bracing Members (structural steel)

Connection between Steel columns and base plate

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1.0 LOAD CALCULATION

1.1 DEAD LOAD (D)

: -Y 1.0

Sample CalculationDead load intensity = 1.2

UDL on main Frame beams = Dead load intensity x Eff. span

Effective Span(m)

6 7.27 8.4

6.5 7.8

The UDL is applied on the platform Beams at El

( as applicable)

1.2i) Electrical Cable Tray Load (as furnished by electrical department) =

Sample Calculation= 1.2225

Dead Load= Electrical Cable Tray Load x No. Of Tiers = 1.225 x 4 = 4.9

UDL on Beams= Dead Load x Effective Span = 4.9 x 6 = 29.4

Elevation Effective Span No. of Tiers Dead Load UDL on Beams(mm) (m) kN/m2 (kN/m)

e.g. 6 4 4.9 29.4

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GUIDE No.

The self weight of the member will directly be calculated by STAAD.PRO

Dead load of platforms (including grating and grating supported beams) is assumed as 1.2 kn/m2 and applied as uniformly distributed load on the transverse beams of platform accordingly.(Grating supporting beams are not modelled).

kN/m2

UDL on Main Frame Beams(kn/m)

Fire Proofing Load(Fp)

Cable Tray load (Dc)

kN/m2

Electrical Cable Tray Load (say) per tier kN/m2

kN/m2

kN/m2

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< DESIGN SHEET FOR OFFSITE PIPE RACK >

ii) Instrument Cable Tray LoadInstrument Cable Tray Load =

e.g. Sample CalculationInstrument Cable Tray size (1200 W x 400 D )

= 900 kg/m= 8.82 kN/m

Dead Load= Instrument Cable Tray Load / Width = 8.82 / 1.2 = 7.35

UDL on Beams= Dead Load x Effective Span = 7.35 x 6 = 44.1 kN/m

Elevation Effective Span Width Dead Load UDL on Beams(mm) (m) (m) kN/m2 (kN/m)

6 1.2 7.35 44.1

1.3 Equipment Load

1.3.1 Equipment Empty Load (EQE)Equipment Tag no. EQE(kg)

e.g 11-EE-201 xxx xxx 50000 4 122.5

1.3.2 Equipment Operating Load (EQO)Equipment Tag no. EQO(kg)

e.g 11-EE-201 xxx xxx 60000 4 147

1.3.3 Equipment Hydrotest LoadLoad (EQT)e.g Equipment Tag no. EQT(kg)

11-EE-201 xxx xxx 70000 4 171.5

(as furnished by Instrumentation department)

kN/m2

Instrument Cable Tray Load (say) per Duct

kN/m2

Reference Drawing No.

P/F elevation (m)

No. of S

Load Per Support

(kN)

Reference Drawing No.

P/F elevation (m)

No. o

Load Per Support

(kn)

Reference Drawing No.

P/F elevation (m)

No. of S

Load Per Support

(kN)

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1.4 Pipe Loads

1.4.1 Pipe Operating Load (PO)

Piping Loads are applied as per Civil Information Drawings.( Refer Drawing no.xxxxxxxx)

Dia of Pipes (inch) Span(m)>30'' 12 As Applicable<30 '' 6

Pipe Operating Load is applied as UDL for pipes less than 12" diaand an additional Point Load for pipes of dia 12" and above.Calculation of Point Load :EL Pipe Dia Span

mm inch kg/m m (kN)6500 26 533 6 23.81

12 147 6 5.1728 575 6 25.7012 178 6 6.9920 351 6 14.85

1.4.2 Piping Loads On the Longitudinal Beams

Same as above.

1.4.3 PIPE FRICTION (PF)

1.4.4 PIPE ANCHOR LOAD (PA)( as per civil information drawing)

Pipe UDL

Point Load

Pipe friction load on each pipe tier, in longitudinal direction is considered as 10% of pipe operating load.

Anchor loads of 5 kN each are typically applied at 1/3rd span locations at all pipe supporting tiers and on all bents. ( except for those tiers where flare and steam line anchors are present).

50 % of the anchor load is considered as thermal component (conservatively) and added withwind or seismic load in respective load combinations.

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1.4.5 PIPE GUIDE LOAD (PG)( as per civil information drawing)

1.5 LIVE LOAD CATEGORY (LL)

Sample Calculation :Live load Intensity = 2.5

Effective Span = 5 mUDL on beams = Live load Intensity X Eff. Span = 12.5 kN/m

Elevation Effective Span Live Load UDL on Beams(mm) (m) (kN/m)

e.g. 6 2.5 15

1.6 BUNDLE PULL LOADEquipment Tag No. And Drawing ReferencePlatform Elevation =Bundle Weight =2700 kgs = 26.46 kNLength of Saddle = 0.6 mNo. of Saddles = 2Spacing of Saddles = 3 mBundle Pull at fixed Support = 27 kN(Considering 100 % bundle Pull at fixed Side conservatively)Bundle Pull per post = 13.5 kNCenter of Bundle above saddle = 0.78 mPush Pull due to removing of bundle =

1.7

Live load on Operating and Maintenance platforms is taken as 5.0kN/m2 and Access Platforms and Walkways is taken as 2.5kN/m2 and applied as uniformly distributed load on the Platform supporting beams accordingly.

kN/m2

kN/m2

WIND LOAD IN Z DIRECTION (WZ)