ASME Section IX – Weld Procedures
All welds on pressure vessels must be made by qualified welders, using qualified weld procedures. Section IX of the ASME Code specifies all the requirements for those qualifications. A weld procedure,…
Tag: engineering
“The Perfect Order” – #MetalMarketUpdate – January 2023
This bit of wisdom came from a long-time friend and co-worker who received this sage advice from a leader in the Corps of Cadets at Virginia Polytechnic Institute: “If you…
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…
#METALMARKETUPDATE – JANUARY ’23
The ISM Manufacturing Index (PMI) fell for the second straight month to 48.4 in December, following a score of 49 in November. The reading shows further contraction in factory activity,…
“It’s Supposed To Be Screwed Up” – #MetalMarketUpdate (December 2022)
We sometimes ask ourselves “why are there so many problems?!” in our daily work efforts. Perhaps the better question to ask ourselves is “how do I navigate the challenges in…
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…
