Recent content by jeevesme

Oh okay. I was taking it that since the MDMT is -20 and above that it didn't need impact tested. But it seems that UHA-51(d)(3) applies only to (-a, -b, and -c)? So based on this, hypothetically, would it need impact tested if the MDMT were 32F?

We have a carbon steel vessel that has a 304L nozzle installed on the top head. We are switching out the 2" sch40 nozzle with 2205 for CLSCC resistance. The vessel has an MDMT of -20. The company performing the calculations is saying that we need to have impact testing performed for the 150#...

We have our relief valves pop tested at certain intervals depending on service. We have some valves that are in Freon service that are replaced every 5 years. We also pop test these after they are removed to see if they would have relieved at the set pressure. We have some valves that were...

What Ferrite numbers should we be at? Is there a range or specific number?

I'm not sure what the FN number is on the filler. I know they use 308h Lincoln wire. I am trying to get the weld(s) ferrite tested to see what they are. I am inclined to say it is the design as well. Each time it has cracked, it has been in the throat of the weld in the same place.

@edstainless, I'm fairly confident that we are getting out the cracks entirely. If we don't get a good PT, we go until it's basically 1/16" opening making it a root pass. The cracking has always been in the center of the weld. I was very careful with the welding and NDE (i even added PAUT...

All, We have a vessel that has had 4 repairs in the same area and just cracked again. We have repaired it using 308H filler for the past repairs. Should we use an Inco or is 308H fine? Vessel Information: Vintage- 2005 Head Thickness- .315" Head Material- 304H Design Temp- 1250F Design...

Thanks, guys. We will recommend that they install coupons to verify compatibility.

Awesome. Thank you, Ed!

Thanks, @EdStainless. This particular tank is fairly small, about 12' in diameter, and temperatures will range from 60F-100F. Would simply setting it directly on the concrete and caulking the chime suffice then? I wasn't sure if the concrete affects 2205 differently than other types of stainless.

We are having a new 2205 tank being shop fabricated that will be placed on an outdoor concrete pad. Should we have a pad of some sort between the tank and the concrete base?

A colleague is wanting to know if they can use a tank with a Butyl rubber liner in it for a high active surfactant product. This is what I found in the SDS(hope it helps). Thanks in advance. Alcohols, C10-16 CAS Number: 67762-41-8 Content (W/W): 0.2 - 0.3% Synonym: Alcohols, (C==10-16)...

@r6155, that's what I was leaning toward. I contacted a colleague ealier and he thought it would be .85. I love codes.

Our company requires that pressure vessel be built with a Joint Efficiency of a minimum .85, and if backing bars are used, they must be removed. The fab company sent me a few pages of section IV code with figure HLW-415 (d)and HLW-402 (a) highlighted. He said that this would result in a .85...

We are going to have the Part fabricated per APP 43. Thank you guys for the help.