I was asked the other day "what are the inspection requirements for fin fan coolers"? I responded that they were ASME Sec. VIII pressure vessels and the requirements are the same. My question is, Are they considered pipeline components and not subject to the same requirements? Are they...
I am about to transport a pressure vessel that was used to separate hydrocarbons and natural gas. It has been out of service for years but the question of de-gassing has been raised. Am I required to De-Gas prior to shipment? Can I just blind flange the vessel and transport? the vessel will...
Gents,
Having worked for RCS for 17 years, this is definitely not a corrosion coupon "retractable" holder. Looking at the end, it appears this might be a check valve. If it is, this is for injection purposes. If you look into the end and see pins for an electrical connection, then this is a...
Thanks for the assistance. That is all that I need to put some teeth into my proceedure. They guys in the field see that it is in the spec but they want something concrete from code. I am creating a whole lot of work for them.
For years I have been doing Pressure Vessel Inspections and have gone by what was taught when i learned. I was taught to assure that all bolted joints had at least three exposed threads beyond the nut. Where does this come from. I have been looking but not found it yet. Is there a place in...
I am trying to wire up a modern alternator into a vintage Ford. I know where to connect the "Bat" terminal but I am not sure where to connect the Field and Stator Terminals. I know one goes to the Block for sensing but the other I am not sure and which goes where. There is little information...
To get a good profile of thickness, you can use UT methods such as B-Scan or C-Scan. Both will help you guage the average thickness as well as capture minimums and profiles. I prefer B-scan as it is quicker and simpler. Many machines such as the Panametrics Epoch 4, and RCS TMI-150 are very...
I am inspecting a propane storage bullet which was built with "0" corr. allowance. Can I perform an "Alteration" to this vessel in order to recalc it using the latest stress values and give it some corrosion allowance? We just performed an internal visual inspection, magged the welds, and UT'd...
Look for a company using the TMI-150 Ultrasonic B-Scan. Properly set up you can see the interface between the clad and the steel. I used this instrument for 12 years to inspect the clad on Pulp Digesters and it was fairly accurate. We had to play to get the velocy correction but it is fairly...
Gentlemen,
I have been tasked with the inspection of an Anhydrous Ammonia Storage Vessel. I remember that the biggest concern was SCC in the welds but am Unsure of the extent of the testing required. It has been a while. My questions is simple.
To what extent do I need to Shear Wave the...
James,
There is an instrument on the market which I personally have used on Clad Digesters and could read the thickness of the steel and the clad overlay separately. The unit is the TMI-150 B-Scan. It was produced and sold by Rohrback Cosasco Systems. Many Testing companies have this scope...
Gents,
in the national board code it says that when welding on a coded vessel which is "OF ROUTINE NATURE" is performed, the R-1 requirements are waived. Does the repair of a seal welded tray on a contactor fit this? We have a chimney tray with a possible bad seal weld, do we need...
Do you have tanks in similar service? One of the things that you can do is compare tanks of similar service to the ones out of compliance. If the other tanks are in good shape, you can opt against inspecting them at this time based on collected data. After you establish this, you can schedule...
A conversation with a "CODE" shop the other day raised the question of U versus R stamps. The code shop insisted that a "U" stamp is acceptable for repairs instead of an "R" stamp. I disagree but others in my group do not. What is the concensus of the forum...
