Hello everyone, 20 year ME/PM background in oil/gas where I've been only exposed to a couple canned project management tools, homemade excel based scheduling tools and failed attempts at MS project. We have a robust erp system with accurate labor hour buckets for manufacturing and currently...
I was assuming one continuous circular weld but I agree it would be very approximate without calculating the ID and OD of the weld at the pipe cap.
Are you using roark for the shear thru plate calculation at the pipe OD?
...of 4.5"OD nozzle pipe) X (0.177) = 2x14.14x0.177= 2.50 in^2
Using ER70S-6 wire at 70,000psi, solve for F=OtA=(tensile strength of weld)*(Effective Area of weld) = 70,000*5= 175,000 lbf
Plate and Pipe Cap Thickness:
If I cant force UG-34 by calculating a flat head (assuming the pipe cap...
...ASME pressure vessel. see below link for a visual.
Link
Nozzle Pipe Cap: SA234, 6" XH (0.438" wall thickness)
Pressure: 200 PSI for hydro of 1.3*200= 277 PSI
Nozzle Pipe: 4" 0.337" Sch 80 SA-106B Pipe
Reinforcement plate: 1/2"thk circular plate. OD: 7.25" that has a 4.5" ID to allow the...
I'm using API 661 7th edition which is the 2013. And I agree...just curious why or what the intent was in targeting low ally Cr-Mo original. The carbon steel I get....they want the bottom barrel, low to no spec jobs tested to something cheap that gives a "base" line for metal properties.
I am hoping to gain alittle more on the intent of the Brinell hardness testing for what they classify as "chromium steels." I assume someone is making very specialized Cr steel pressure vessels, but why just those 3 types? It seems like the intent is check tensile/yield strength of the plate...
TGS4- when you mention having customers stop using arbitrary nozzle load tables, which i agree, but once this gets implemented into 2019, how are you expecting OEMs to handle API Nozzle Load tables. Take full exception or just beef up the coolers? Its not uncommon for us to sell 20-40 lease...
Hey molten. I think you may have misunderstood. The request is inlet and outlet process nozzles to be 150# but vents and drains to be 300#. Typically I have always kept flange ratings the same, so I would update all to 300#
TGS4, I agree, only between the AI and Manufacturer as they are the jurisdiction.
but i have question on your "TGS4 (Mechanical)25 Apr 19 23:01
SnTMan - only with respect to contractual requirements. That is not a Code requirement. Unfortunately."
What are you saying is not a code...
I've always been taught that you want to keep all nozzle connections on a pressure vessel the same for safety and engineering 101 principles. I currently have a customer that wants all nozzles 1-2" to be 300#, and all 4-8" to be 150# when specified as minimum pressure,say 50psi. I always...
Hey everyone, I just ordered a hard print that will be here in a week or two but can someone tell me the requirements listed by this Annex J? I am currently trying to satisfy a pressure vessel for SK CRN. Looks to be a (new)requirement I was not aware of under the Special Circumstances...
As a fabricator for a customer that is not going to provide gasket/piping forces/etc till the units are shipped(some even by packages that have no end user yet and are for rental fleets), how does API's nozzle load tables play into affect? Is the idea that we should no longer quote arbitrary API...
LOL, I had semi assumed this but I also thought maybe I could just use the mean inner and outer diameter of the gasket dimensions.... What else have I not considered ;)
...loads will have a API Nozzle load Fyaxial= 760ft-lbf and then M1z and m2x of 600ft-lbs each. Fm=1.2 gives us P2901= 506 psi. But the Pm = 16m/(pi*G^3)= 593 psi. Without even solving for Pf, I'm already failing at 2 X API Nozzle loads and forced to provide 1X only or redesign to 300# flange...
...anything designating the equations to be used for this specific usage. Obviously, there are general torque calculations such as Require Torque = K * D * P (where K is the lubrication of the threads coefficient, D nominal diameter of the plug, P clamping load) but I am unsure this simplified...
Hey everyone. I have an old 80's heat exchanger I am reviewing and it was ASME nameplated for -60F MDMT. This is alittle colder than I have dealt with so I am seeking advice. The box's plate/nozzle pipe/flanges have been impact tested per UG-84 to -60F MDMT but I am curious about the...
Thanks David. This matches my logic...one additional item I found was under asme sec ii for art under table 1, it list a500 as an appurtenant material to a36. Therefore, yes it would need to meet 15ft/lb under 1inch thick unless exempt per ucs-6 or ug-20f which states p1 material under 1/2in...
Ironic: Although material wise there is some cost increase, welding and manufacturing will be dramatically increased for a SA-516 plate box. Welding, handling, how its constructed. RMT can be drilled and tapped in one pass in 20-40ft sticks then cut to the proper length, end plates welded on...
