Seal vs. Strength Welds
Heat exchanger tube end welds can be specified as strength welds or seal welds. What is the difference? The tube to tubesheet joint is a critical component of the exchanger…
Category: ASME Code, TEMA and API Facts
Collar Studs in Heat Exchangers
What are collar studs, and when are they used? Collar studs are threaded studs with a larger central hub attached (see diagram). They are commonly used on exchangers with removable…
Fatigue Analyses
When a vessel (or part of a vessel) is subjected to pressure loads that repeatedly cycle from low to high, the fatigue life of the vessel may need to be…
ASME Code Committees
New editions of the ASME Code are published every two years, with hundreds of updates, edits, and amendments. With 13 different sections and thousands of total pages, it is a…
Code Stamp Exceptions
Section U-1 of the ASME code lists certain types of pressure vessels that do not require a code stamp. For example, any pressure vessel that has an internal or external…
Non-Code States
The ASME Code is not a law. What makes it required? It is up to each jurisdiction to pass laws that require boilers or pressure vessels operating in that jurisdiction…
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