Shell Length for Internal/External Pressure
When designing a cylindrical shell for internal pressure, the basic variables needed are the diameter, pressure, material allowable stress, and weld efficiency. The length of the shell is not a…
Tag: columns
Seismic Design
Similar to our discussion of wind design last month, seismic forces should be considered in pressure vessel design. Earthquakes are rare, but if not properly accounted for, a pressure vessel…
Wind Design
UG-22 of Section VIII says that vessel designers must account for any and all expected loads on a vessel, in addition to the internal and external pressure loadings you might…
ASME Section IX – Welder Qualifications
In previous articles, we discussed weld procedures and PQR’s (qualifications of weld procedures). What about the people making the welds? Welders also must be qualified per the rules of Section…
ASME Section IX – Procedure Qualifications
Last month, we highlighted ASME Section IX weld procedures and want to dive into the procedure qualifications this month. Every weld procedure that a fabricator uses needs to be qualified…
#METALMARKETUPDATE – FEBRUARY ’23
The ISM Manufacturing Index (PMI) fell to 47.4 in January, the lowest seen since May 2020. This is the third consecutive contraction in factory activity, for what is assumed to…
