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...
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...
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)...
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...
I've been searching the Internets for the past few days trying to find an answer to my question to no avail. There is a similar thread on the forum here I found yesterday ( i cant seem to find it today) but it doesn't quite pertain to my dilemma. I've gotten in contact with the Representative...
We have an ASME built and NB registered Heat Exchanger that we need to put new tubes in. It has seal-welded 2205 tubes in it and we would like to put 316L tubes in it (because of time constraints) using a non-R-Stamp shop (because of time constraints). This unit operates below 15psig so the...
We had a contractor install a 4" 316l branch connection with a repad on a 12" 316l Line. The repad does not have a weep hole. Apparently it welded up fine. We PT'd it to make sure there were no cracks. Typically we would have the prep area thickness tested and PTd, then the root pass PT'd...
Can the Owner-User allow an External Inspection be done by someone other than an API 653 Certified Inspector? I.e. an API 510 Certified Inspector, an NDE Technician etc.? There seems to be some conflicting statements in the Standard.
The definition of "External Inspection" in API 653 3.14: "A...
So I've found a couple threads that relate to my situation but didn't really answer it.
So . . . . We are getting ready to perform a 250psig hydrotest on a set of 2" half-pipe coils welded on the bottom head of a vessel. The pipe inlet starts near the bottom center and spirals around and...
It seems like a simple straight foreword answer, but I have not found anywhere in API 650 where it states that the fabricator must have a QA/QC Manual for Tanks in order to design and build an API 650 Tank.
We are having an issue with a fabrication company that shop-built and certified an...
Hey guys. We are going to be replacing a heat exchanger nozzle that has been in EDCL service. The original construction is c22 but we cannot get c22 so we have to go with c276. What filler metal is going to be better for the repair? C276, Inco182, or Inco625?
Thank in advance!
We have always had our registered vessels repaired per NBIC because the company required it. However, they (the company) recently voided a lot of their standards because they no longer have the capacity to keep them up and they mostly just regurgitated the codes that were already used anyway...
Hey guys,
I am creating a repair plan to replace an:
-Built 2005
-API 650 Manway Flange
-1/4" Thick
-A106 Carbon Steel
-Sulfur service
-@ ~350F
Is there anything I need to watch out for in terms of the Sulfur Service?
Thanks in advance!
Hey guys, I have a question that I cannot find a direct answer to and thought you guys may be able to help me.
We have some 16" 304ss piping that we have replaced 3 years ago because the welds/HAZ were corroding and causing leaks. We are now in the process of replacing the piping yet again...
We have a vessel that has seen an internal fire. The temperatures hit the temperature limit of the probes at 850F. The temps went from ambient to above 850 back to ambient in 4 days time. I know there is the possibility of (low possibility) Sensitization. However, corrosion resistance is not...
We have a small 8" heat exchanger bonnet that is pretty much shot except for the head. My question is, can we keep the head, and replace the two nozzles, shell portion, the flanges and the pass partition and still have it considered a repair?
I cannot find anything in the build, repair,or inspection codes that address roof distortion on atmos. tanks. I have a few tanks that have some buckling in the roofs. They are all fixed roofs. What would be considered okay, and what would deem it not fit for service? Is there a standard or...
Does the machining of the gasket surface (without welding) of a 12x16 steam drum boiler closure require an R-stamp?
We have a steam drum atop our #2 boiler the is leaking during the hydro. There is some corrosion on the closure that is causing it to get an inadequate seal.
The company that...
