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2008-04-15_REVISION - M1980244 (235)
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2008-04-15_REVISION - M1980244 (235)
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Last modified
6/15/2021 5:52:06 PM
Creation date
5/21/2008 3:07:19 PM
Metadata
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Template:
DRMS Permit Index
Permit No
M1980244
IBM Index Class Name
Revision
Doc Date
4/15/2008
Doc Name
VOL V APP 8 Appendix C.5 Riser Pipe Calculations
From
CC & V
To
DRMS
Type & Sequence
AM9
Media Type
D
Archive
No
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sI <br />SUIT" WILLIAMS CONSULTANTS. INC. <br />r <br />El' <br />C <br />PROJECT: JOB NO: SHEET -OF <br />requa VLF 1125 <br />FEATURE: BY: DATE: <br />Riser Pipe Design ALD 2/18/08 <br />DETAILS: CHKD BY: DATE: <br />Pipe Axial Load DTW 2/20/08 <br /> D.D. = 24" = 2' <br /> Axial thrust = shear traction (ore settlement) + pipe self weight <br /> I.D. = 23 1/4" = 1.937' <br /> Area = O.D. - I.D. = n * (2/2) - Ti * (1.937/2)Z= 0.195 ft2 <br /> Yield Strength = 35,000 psi (Typical for mild steel) <br /> Yield Load = 35,000 Ib/in2 * 144 inz/ft2 * 0.195ftz = 982,800 Ibs <br />Pipe Self Weight: <br /> From the Roscoe-Moss Table: <br /> 24" O.D. x 23 1/4" I.D. pipe = 94.62 Ibs/ft <br /> Total Weight = 50 ft * 94.62 Ibs/ft = 4,731 Ibs <br /> Shear Traction: 79,947 Ibs <br /> F = 79,947 Ibs + 4,731 Ibs = 84,678 Ibs <br /> 84,678 Ibs < 982,800 Ibs <br /> Therefore the design does not need to reduce shear traction. <br />Unlined: <br /> Average Stress = 1/2 * [40 ft * 121] * 0.43 = 1,040.6 psf <br /> T = 1,040.6 psf * tan(17•) = 318.1 psf <br /> <br /> Shear Force = 318.1 psf * 251.3 ftz = 79,947 Ibs <br />FOS Buck ling: <br /> 79,947 Ibs + 4,731 Ibs = 84,678 Ibs <br /> 982,800 Ibs / 84,678 Ibs = 11.61 without compression joints
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