I am checking a Compress calculation report and the designer modeled a 50 ft seam/seam tower with just a single shell course instead of multiple shell course, e.g. 5 shell cans that are 10 ft long.
Will the period of vibration be the same?
I am designing a 300 ft tall x 26 ft diameter tower. The tower would need a thick skirt and thicker bottom shell sections due to vortex shedding...around 1 5/8" thick. Without considering vortex shedding, the skirt and bottom sections would just require 1 1/4" thk sections.
Alhtough the Client...
One of the lift options in the Pressure Vessel Design Manual 3rd edition by Dennis Moss is the Shell Flange Lug shown on pages 391 and 397. Has anybody used a shell flange lug in lifting a vertical vessel? How is it possible to lift a vessel in the vertical position?
According to client, sizing of fillet welds for nonpressure parts, like platform clips or pipe support clips, shall be based on UW-18(d). Is this correct?
"Unless the sizing basis is given elsewhere in this
Division, the allowable load on fillet welds shall equal the
product of the weld area...
According to UCS-66, attachments that are essential to the structural integrity of vessel shall be evaluated for impact testing. Are vacuum stiffening rings considered to be one of these attachments?
Are stiffening rings required to be evaluated for impact testing per UCS-66?
Vessel MDMT is...
Hello all.
Our customer's spec states that Vessel MAWP shall be the Design Pressure. Customer wants their vessel U-stamped and registered for MAWP = design pressure.
Customer spec also states that MAWP shall be limited by the lesser of shell, head or flange rating and in no case shall the MAWP...
