Offsite Pipe Rack Final

< DESIGN SHEET FOR OFFSITE PIPE RACK >

x-xxxx-xxxx Rev. 0 Page 1 of 2

DESIGN SHEET FOR OFFSITE PIPE RACK

Rev.NO. Date Format No. EIL 1641-1919 Rev. 1

Purpose

Prepared by

Checked by

Approved by

Copyright EIL – All rights reserved

< DESIGN SHEET FOR OFFSITE PIPE RACK > 1.0


Check list

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

SR NO. i)

LOADING/INFORMATION EQUIPMENT LAYOUT +GAD'S +CIVIL FURNISHED/NOT FURNISHED INFORMATION INFORMATION DRAWINGS

(√) / (X) a) b) c) d) e) f) e) f) g) h) i)

j)

k) l)

m)

n)

o) p)

q)

Pipe Rack layout Cross Sections and Location Width and Span Portal Spacing Tier Elevations Longitudinal beam Elevations Requirement of intermediate beams Equipment placed on rack Monorails Space allocation for Electrical and Instrument trays/ducts Transfer line size,schedule,insulation thickness,location,elevation,location and type of supports (rigid/ spring) and location of cross guides. Flare and O/H vapour line sizes,schedule,insulation thickness,location and elevation Location and size of platforms for equipments supported on pipe rack Air fin cooler floor(if required to be in RCC construction in place of steel grating based on Piping Design basis. Requirement of additional metal inserts

Size, schedule,insulation thickness,location and elevation of pipes above 30'' dia to be supported on extended column/framework above top tier. 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 calculating wind forces. Size, schedule,insulation thickness,location and elevation of cooling tower lines if above 30'' dia.

TO BE FURNISHED BY PIPING

r)

ii) iii) iv)

Piping and platform arrangement at battery limit. Electrical requirment of cable trees and tiers,platforms ladders,stairs,etc. Instrumentation requirement of cable ducts,platforms ladders,stairs,etc. Capacity of monorails if any

Electrical

Instrum -entation Rotating Eqpt.



INTRODUCTION

1.0 1.0 2.0

This document presents the design for offsite pipe rack. N-S GRIDS E-W GRIDS STRUCTURAL DISCRIPTION

2.0 1.0

TRANSVERSE FRAME SPACING

=

2.0

NO. OF BAYS

=

3.0

NO.OF TIERS

=

4.0

TIER ELEVATIONS

=

5.0

INSTRUMENT TRA (NOS & ELEVATIONS)

=

6.0

ELECTRICAL TRAY (NOS & ELEVATIONS)

=

7.0

WALKWAY LEVEL (NOS & ELEVATIONS)

=

8.0

EQUIPMENT PPLATFORM LEVEL

=

9.0

STAIR CASE

=

10.0

EXPANSION JOINT

11.0

i)

LOCATION

=

ii)

PROVISION OF FUTURE BRACKETS

=

BRACED BAYS NOS = LOCATION =

< DESIGN SHEET FOR OFFSITE PIPE RACK > 1.0

BASIC DESIGN INPUT /DATA

1.1

METEOROLOGICAL DATA

1.2


SEISMIC ZONE

:

CATEGORY)

:

PLANT ELEVATIONS

HIGH PAVING POINT FINISHED GROUND LEVEL NATURAL GROUND LEVEL

HPP : FGL : NGL :

1.3

SOIL/PILE DATA (REFER GEOTECHNICAL REPORT DOC NO.XXXXXXXXXXXXX

2.0

MAERIAL DATA STRUCTURAL STEEL (CONFORMING TO IS 2062):

f y

BOLTS ( as per IS 1367) High strength Bolts Ordinary Bolts

MPA

: Property Class-8.8 : Property Class-4.6 : HYSD TMT steel bars of Grade Fe 500

Reinforcement bar (Conforming to IS 178

Modulus of elasticity of Reinforcement Steel

: 250

Es

: 200000 MPA Refer Clause 38.1 of IS 456

Concrete

Sub Structures & Superstructure Density of RCC Density of PCC Modulous of Elasticity of Concrete

Anchor Bolts

Friction Coefficient

fck : ycon : ycon : Esc : (Refer

30 MPA 25 kn /m3 24 kn /m3 5000√fckMPA clause 6.2.3.1 of IS 45

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

Concrete to Soil

: 0.5



1.0 Design Considerations/ Philosophy

Important Elevations Ground Water table elevation Bottom of Steel Column Elevation Foundation depth below HPP Bottom of Foundation Elevation

GWT : BOPC : : BOF :

2.0 Framing Arrangement

Transverse Frame Longitudinal frame

: Moment Connected Structural Steel fra : Braced Vertical and Plan Bracing Members (structural steel)

Connection between Steel columns and base plate

: Fixed

Steel beams in transverse direction Steel beams in longitudinal direction

: Fixed : Pinned

Braced bay in longitudinal frame

:

Secondary beams

: Pinned

GUIDE No. x-xxxx-xxxx Rev. 0


Page 1 of 2

1.0 LOAD CALCULATION 1.1 DEAD LOAD (D)

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

:

-Y 1.0

=

1.2

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). Sample Calculation Dead load intensity

kN/m2

UDL on main Frame beams = Dead load intensity x Eff. span Effective Span(m) 6 7 6.5

UDL on Main Frame Beams(kn/m) 7.2 8.4 7.8

The UDL is applied on the platform Beams at El Fire Proofing Load(Fp)

( as applicable)

1.2 Cable Tray load (Dc) i) Electrical Cable Tray L (as furnished by electrical departm = Sample Calculation Electrical Cable Tray Load (say) per tier = Dead Load= Electrical Cable Tray Load x No. Of Tiers = 1.22 = UDL on Beams= Dead Load x Effective Span = 4.9 x 6 = Elevation (mm) e.g.

Effective Span o. of Tier Dead Load (m) kN/m2 6 4 4.9

kN/m2

1.22 4.9 29.4

L on Bea (kN/m) 29.4

kN/m2 kN/m2 kN/m2

ii)

Instrument Cable Tray Load Instrument Cable Tray Lo (as furnished by Instrumentation department)

e.g. Sample Calculation Instrument Cable Tray size (1200 W x 400 D ) Instrument Cable Tray Load (say) per Duct

= = Dead Load= Instrument Cable Tray Load / Width = 8.82 / 1.2= UDL on Beams= Dead Load x Effective Span = 7.35 x 6 = Elevation (mm)

Effective Span (m) 6

kN/m2

=

900 8.82 7.35 44.1

Width (m) 1.2

Dead Load kN/m2 7.35

L on Bea (kN/m) 44.1

P/F elevation (m)

EQE(kg)

xxx

50000

N Load o Per . Support o (kN) 4 122.5

1.3 Equipment Load 1.3. Equipment Empty Load (EQE) uipment Tag n Reference Drawing No.

e.g

11-EE-201

xxx

1.3. Equipment Operating Load (EQO) uipment Tag n Reference P/F Drawing No. elevation e.g

11-EE-201

xxx

xxx

1.3. Equipment Hydrotest LoadLoad (EQT) e.g uipment Tag n Reference P/F Drawing No. elevation (m)

11-EE-201

xxx

1.4 Pipe Loads 1.4. Pipe Operating Load (PO)

xxx

EQO(kg)

N o

Load Per

60000

4

147

EQT(kg)

70000

N Load o Per . Support o (kN) 4 171.5

kg/m kN/m kN/m2 kN/m

Piping Loads are applied as per Civil Information Drawings.( Refer Drawing no.xxxxxxx Dia of Pipes (inchSpan(m) >30'' 12 <30 '' 6

As Applicable

Pipe Operating Load is applied as UDL for pipes less than 12" dia and an additional Point Load for pipes of dia 12" and above. Calculation of Point Load : EL Pipe Di Pipe Span Point UDL Load mm inch kg/m m (kN) 6 23.81 6500 26 533 12 147 6 5.17 6 25.70 28 575 12 178 6 6.99 20 351 6 14.85

1.4. Piping Loads On the Longitudinal Beams

Same as above. 1.4. PIPE FRICTION (PF) Pipe friction load on each pipe tier, in longitudinal direction is considered as 10% of pipe operating load.

1.4. PIPE ANCHOR LOAD (PA) ( as per civil information drawing) 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 1.4. PIPE GUIDE LOAD (PG) ( as per civil information drawing)

1.5 LIVE LOAD CATEGORY (LL)

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. Sample Calculation : Live load Intensity

=

2.5

kN/m2

Effective Span UDL on beams = Live load Intensity X Eff. Span Elevation (mm) e.g.

Effective Span Live Load (m) kN/m2 6 2.5

= =

m kN/m

UDL on Beams (kN/m) 15

1.6 BUNDLE PULL LOAD Equipment Tag No. And Drawing Reference Platform Elevation = Bundle Weight =2700 kgs = Length of Saddle = No. of Saddles = Spacing of Saddles = Bundle Pull at fixed Support = (Considering 100 % bundle Pull at fixed Side conservatively) Bundle Pull per post = Center of Bundle above saddle = Push Pull due to removing of bundle = 1.7 WIND LOAD IN Z DIRECTION (W Z)

5 12.5

26.46 0.6 2 3 27

kN m m kN

13.5 0.78

kN m

Offsite Pipe Rack Final

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