http://www.micronsteel.com/ansi-b169-buttweld-fittings/ansi-asme-b16-9-elbow-manufacturers.html
We have specialization to manufacturer customized asme b16.9 elbow per customers' specifications.Micron Steel and Tubes Supply large amount of High Qua
Deskripsi lengkap
diskolasi sendi siku
dislokasi elbow
gDeskripsi lengkap
gFull description
jurnal
Full description
Full description
Deskripsi lengkap
Full description
DESIGN OF COLUMN DAVIT MDC NO :
Client
:
Page :
JOB NO :
Consultant :
Rev. :
Made By :
Eqpt. No. :
Date :
(Design of Davit as per "PRESSURE VESSEL DESIGN MANUAL" by Dennis R Moss)
L1 BOOM fh
fv
fv
M1 L3
COLUMN OD
MAST
M2
L2
R
L4
Nominal Size of Pipe Outside Diameter of Pipe
NPS D
Schedule of Pipe Thickness of Pipe (Considering 12.5% - Manufacturer's Tolerance) L1 Length of Boom
L2 Radius R WB Weight of Boom WM Weight of Mast Weight of Curvature Portion WR Length of Mast
[ [ [ [
inch inch
] ] ] ]
3 3.500 Sch. 80 0.264
[ [ [ [ [ [
inch inch inch lbs lbs lbs
] ] ] ] ] ]
25.591 35.433 9.626 19.497 26.995 11.520
DESIGN OF COLUMN DAVIT MDC NO :
Client
:
Page :
JOB NO :
Consultant :
Rev. :
Made By :
Eqpt. No. :
Date :
DESIGN OF COLUMN DAVIT AS PER " PRESSURE VESSEL DESIGN MANUAL " BY DENNIS R MOSS. Weight of Boom & Curvature PortionWB+WR
W1 WD WL D tp
[ [ [ [ [
lbs lbs lbs inch inch
] ] ] ] ]
31.016 58.011 716.502 3.500 0.264
I
[
inch 4
]
3.539
A
[
inch 2
]
2.686
Z
[
inch 3
]
2.022
Radius of Gyration 4 Outside Radius of Davit PipeD / 2
r a
[ [
inch inch
] ]
1.148 1.750
LOAD ON DAVIT Vertical impact factor Horizontal impact factor (0.2 - 0.5) Vertical force = Cv X WL Horizontal Force = Ch X WL
Cv Ch fv fh
[ [ [ [
lbs lbs
] ] ] ]
1.5 0.5 1,074.752 358.251
Bending moment in mast at top guide of support
M1
[ lb-inch ]
40,594.288
2fvL1 + 0.5W1L1 + fhL2 Axial load on Davit mast
fv + WD
P
[
lbs
]
1,132.764
Axial Stress
P/A
fa
[
psi
]
421.736
M 1 ( L2 - R ) L2
M2
[ lb-inch ]
29,566.173
Bending Stress at M1
M1 / Z
fb1
[
psi
]
20,074.801
Bending Stress at M2
M 2 D æö 2 ç÷ I ç÷ èø3K 3 b
fb2
[
psi
]
73,039.005
-
[ [ [ [
psi psi psi
] ] ] ]
SA106 Gr. B 35,000.000 21,000.000 23,100.000
-
[
-
]
0.020
-
[ [
-
] ]
0.869 0.889
WB+WM+WR
Total Weight of Davit Maximum Rated Capacity Outside Dia of Davit Wall Thickness of Davit
p ( D 4 --( D
Moment of Inertia
2t p )4 )
64
p ( D --( D 2
Cross Sectional Area
2t p ) )
4
p ( D --( D 4
Section Modulus
2
4
2t p ) )
32 D D +(D 2
tp)
2
BENDING MOMENT IN DAVIT MAST (Considering Type B Davit)
Bending Moment
where, a = tpR / D2
0.208 2
where, b = 6 / (5+6a )
1.141 2
where, K = 1 - (9 / (10+12a )) Material of construction for mast Yield Stress of the Davit material Allowable axial stress in the mast=0.6XSy Allowable bending stress in the mast=0.66XSy Ratio fa / Fa Ratio (Greater of fb1 & fb2) / Fb f a Greater ( fb 1orfb 2 ) + Fa Fb
