Hello all,
Had a question regarding if a code hydrotest is required on a new heat exchanger bundle? With regards to Section VIII, would the requirements be different based on the type of bundle it is? For example, a U-tube bundle that has rolled only tubes would require no welding vs a U-tube...
We have some site requirements that specify tubes in heat exchangers and air coolers be strength welded when tube diameters are greater than or equal to 1 1/2". Speaking with some manufacturers, they don't seem to have an issue with rolling tubes in 1 1/2" or larger tubes. Other than higher risk...
Hello everyone,
Looking to see if anyone has material properties and chemical composition of this material spec? Having a hard time finding it anywhere. I found that it was superseded by ASTM A447 at some point. I have the specification for that material, but the material properties changed a...
Hello everyone,
I'm in search of the flange pressure-temperature rating tables for class 150 & 300 flanges in the 1955 B16.5 or B31.3 codes. I wasn't aware tables were in B31.3 in that time, but my pipe spec references both (see attached pic). It would be greatly appreciated if someone could...
Hello everyone,
I have a heat exchanger channel built in 1971 out of SA-357. I'm having a hard time figuring out what material this is online. There is a note on the drawing saying "Material: P-5." Yes, very vague. All of the nozzles are SA-335-P5 & SA-182-f-F5 so I assume it is all 5 Cr...
Hello everyone,
I have a 1970s built reactor with vessel material listed as A-387-B N&T. Is this material equivalent to today's A-387-12?
I appreciate the time in advance!
Edit: To clarify, I ask this because I've seen conflicting responses on different forums between A-387-11 and A-387-12...
We have wedgeplug valves in our FCC slurry and bottoms pumparound systems. There are a few valves that are having issues sealing and have had bonnet leaks in the past. We are evaluating repairing or replacing some of these valves.
I would like to focus on the bottoms pumparound system for this...
Hello everyone,
I'm looking at evaluating an increase in max dP of an elephant stool (Outlet collector ring) in a reactor. Evaluating the stiffener ring based on the original calculations from the manufacturer, they reference Roark's Table 35. This reactor was built in 1977 so I'm assuming they...
Hello everyone,
We will be smart pigging the convection section of a box furnace and we need to take a tube sample (weld to weld). My question is if the tubes within a furnace are considered pipe and designed to B31.3 or designed to the code of the furnace? Additional question, what are box...
