Civil/Structural Engineers need to know how difficult to design pipe support with a safe & economical design to support the piping loads, especially when final piping drawings are not available. ...
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Civil/Structural Engineers need to know how difficult to design pipe support with a safe & economical design to support the piping loads, especially when final piping drawings are not avai…Deskripsi lengkap
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PETRONAS pipe support
pipe support
PETRONAS pipe supportDescrição completa
Specification for Pipe Support
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Piping Engineer/Designer can refer to this to design Pipe support.Full description
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EstandaresFull description
pipe supportDescripción completa
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Block 07
Calculation sheet
Two 400mm pipes are used to handle the condenser water of Block 07(supply & return). We use a base platform at at LL3 to cater the total weight of the pipes. 1. Calculations for base platform Data
- Selected beam for base platform
150x150 B D t Ix-x
Data sheet is attached (Annex 01) 150 150 7 1623
mm mm mm cm c m4
Figure 1 : I - Beam detail - Yield strength of steel
S 275
16 mm 275 275 Mpa Mpa
- Technical data for anchor bolts are taken from fischer catalog - Condensor water riser height (m) - Linear density of pipe (4 ( 400mm),sch 40 with water
46.667 m 237.3 kg/m
Data sheet is attached (Annex 02)
Refer attached drawing (Annex 03) data sheet attached (Annex 04)
Notes/Assumptions: - Self weight of I - beam is negligible - Load on the platform is considered as an UDL - Concreate wall is considered as cracked concreate - Beam is considered as simply supported beam B
w
1
D i
db
Ch th
Si i
dh
Block 07
Calculation sheet
A R A
l
RB
x
Figure 2 : Forces on base platform at LL3 a. Calculation for the beam Nos of beams Beam length Load per pipe with water Nos of pipes Total load With 1.5 safety factor (2W) UDL (w)
5 2.5 108.64 m 2 217.27 kN 326 kN 130.40 kN/m 26.08 kN/m 9 Nos
UDL (w) per beam Nos of brackets Considering vertical forces on the beams R A = RB (=wl/2)
32.60 kN
2
Maximum bending moment on the beam (wl /8) Maximum bending stress of the beam (σ = -My/I)
20.38 kNm 188.31 Mpa
< 275 Mpa
OK
b. Base plate design (refer ASD procedure) Allowable bearing stress on the MS plate (0.7 f'c) 192.5 Mpa f'c is compressive strengh of steel (=275Mpa) Required plate area (Axial force/bearing stress) 0.0008468 m2 N'xB' 0.03 0.029 m N and B are the diamentions of the base plate Considering vertical Ø 250 mm pipe, 300 x 300 x 16 mm plate is selected. Plate thickness according to the Allowable Stree Design (ASD) Procedure (tp= max{m or n} (fp/√(0.25Fy))) 0.0041 m OK 4.18 mm < 16 mm
2
D i
db
Ch th
Si i
dh
Block 07
Calculation sheet
The base plate is checked for bending Note/ Assumptions: - Plate is considered as cantilevered beam - Axial force due to pipe riser act on the base plate as an UDL.
UDL (w)
543.33 kN/m 2
Ø 250
Maximum moment (wl /8) Bending stress Therefore plate does not fail due to bending
0.04 kNm 3.32 Mpa
< 0.75x275 Mpa
OK
wl
Figure 3 : Bending moment on base plate
c. Anchor bolts for vertical wall Note: - Nos of required bolts are calculated considering shear load - Fischer model FAZ ll 16 is considered for the analysis. - Friction force between concrete wall and the end plate has not been considered.
Data sheet is attached (Annex 05)
3
D i
db
Ch th
Si i
dh
Block 07
Fischer model FAZ ll 16
Permissible shear load V perm
Calculation sheet
bolts per beam RA (RA/Vpe Required (kN) min bolts rm)
31.4 32.60
2
10
OK
RA C2
C1
Figure 4 : Shear force on side plate of the base platform at LL3
