Hi. Working on a tank repair where we are replacing all floor plate due to soil side corrosion. Upon removal of old plate there is a layer of rust scale left behind which is quite brittle. Disturbing cause powdering and settling into aggregate foundation material. Question is: Will this rust...
We are making modifications to an existing API storage tank and would like to hot tap 4"-10" nozzles. Drawing indicate material as SA 131 Gr C, but I do not see that listed in the material group tables of API-650. Can someone tell me what group this material would fall into?
Any help would be...
U-1 Scope says that the vessels are exempt for provisions of the code if they fall under certain guidelines one of which is:
(c) (2) Based on the Committee’s consideration, the following classes of vessels are not included in the scope of this Division …..
(-h) vessels not exceeding the design...
This is for application above the water spray in an HCl scrubber. Temperature will be below 100F. There may be trace solvents (PPM) in the HCl gas stream, but don't know the exact composition of any HCl that may be entrained in the scrubbing water mist.
If there is water failure the vapor...
We are replacing an HCl scrubber that has an existing Teflon demister pad that has Hast B grid (at least that is what the drawings indicate).
We want to know if Hast C276 will work in this low HCl concentration, low temperature, environment.
We know that Hast B is better for boiling HCl (lower...
I have a question re: interpretation of API 650 5.10.4.7 - Roof support column base plate requirements, specifically as pertains to vertical movement.
Code indicates that the design shall "allow the columns to move vertically relative to the tank bottom without restraint in the event of tank...
I have a project where we need to increase the size of an existing nozzle in a column. This nozzle with be larger than any nozzle originally supplied with the column so it will be an alteration rather than a repair. The plant had done this previously approx. 15 years ago and at that time they...
Duwe6: Thanks for the quick reply.
I should have also mentioned that part of the problem is that the pressure test cap interferes with the internal tray clips. They actually will want to cut out old nozzle, weld in new, install cap, pressure test, cut out cap, install new tray clips, then PWHT...
A client is modifying an existing CS column by removing an existing nozzle and replacing with a larger nozzle. When previous work of this kind was performed on this vessel in 1999 they welded a larger OD pipe cap to the inside of the column in order to perform a local hydrotest of the nozzle...
I have a model where I entered an element and indicated a bend. I then went back and inserted a branch element at a previous tee location. When I go back to the first element and continue the model does not show a bend at the intersection and when the model is run reports the error in the...
I am working a stress analysis of an existing hot piping system where numerous supports have been painted over the years. Pipe slides/guides where paint has filled gaps between pipe shoes and steel.
I am looking for suggestions when modeling in Caesar II. I assume one way is to define a...
Does anyone out there have a copy of ANSI B16.5-1981? I need to know if there was a differentiation in the pressure/temperature ratings between SA182 F304H and SA182 F304L.
Any help would be appreciated.
Thanks.
I am doing App 2 flg calcs for a slip on flange with no hub. I can deal with h=0, and I know that factors FL and VL and f are fixed when g0 = g1. But what value do I use for g1? Is there a minimum value that I am missing when I read the code section? This value is used to determine the...
I am running calcs for a Pfaudler glass-lined reactor built in 1982 to ASME Sec VII Div 1 1980, 1981 Addendum, and Code Case 1251.
I cannot find information on this code case, and do not see it listed when I search the IHS web site.
Does anyone know what this case relates to, or where I might...
