Can anyone point me in the right direction on how to calculate the thickness required due to pressure for a square duct. Pressure is extremely low, 5kPa/-2kPa. We need to add nozzles to it so I just have to make sure that the reinforcement calcs are done correctly.
Hi all,
I need some assistance/advice. I have been task with adding new instrument nozzles to a CO boiler duct. My experience is mostly in pressure vessels and heat exchangers, but since these nozzles are 2" and smaller I thought to use ASME nozzle design (I know it's overkill, but I thought it...
Hi all,
I am more a pressure vessel engineer, but I am trying to do a pre-design check on the heating taking place in a compressor room. I am trying to figure out if cooling of the room is needed as the intake air temperature should not exceed 46deg C.
My Heat Transfer/Thermodynamics is very...
Hi XL83NL,
I see API TR 9388 C is for the use of DSS in oil refining, isn't it a lot more stringent than I would need for desalination? The only concern I have is to eliminate or at least limit pitting and crevice corrosion, so I want the welding to be of a good quality.
Operating temperature...
Hi,
My company is in the desalination industry, which I only joined recently from Oil & Gas. I have very little experience in the way of manufacturing of Super Duplex 2507 piping, so I really require some good advice.
We will be manufacturing the 2507 manifolds overseas, so I need to write a...
Hi,
I have a question regarding ASME B31.3 para 341.4.
The 8" Sch. 80 SA-312 TP316L piping will be in Normal Fluid Service (water at 50deg C and 70bar) and according to para 341.4.1(b)(1) 5% or more of circumferential butt welds shall be RT-ed or UT-ed. My question is regarding a 1" branch for...
Hi,
A fabricator has welded some rectangular support pads to the shell of a tank for a client of ours, but did not adhere to specified weld clearances and has now submitted a non-conformance for us to review. The tank is designed in accordance with API 650 and 620 (conical bottom) and...
Thank you for all the responses.
dhengr, due to some other 'contractual' factors I cannot calculate these for myself, but I (and seemingly correctly based on the responses) had a concern about these pads having 90 deg corners.
Hi,
A contractor known worldwide is building 3 tanks for us in a foreign country, and they had to weld some pads to the shell for platforms and stairs clips. Drawings were only submitted after the pads were already welded to the shell, and it turns out the pads do not have rounded corners but...
Thanks for the reply DekDee. His exact wording was:
"To my understanding:
BS1501 Gr430A is Similar ASME P1 Gp1 material (Unassigned Material)
Therefore as per ASME section IX Edition 2010:
PQR attached should be acceptable for welding P1 Gp 2 (SA 516 Gr 70) to similar P1 Gp 1 (BS1501 Gr430A)...
The following welding is required:
1. BS1501-151 Gr.430A to SA-516 Gr.70
2. BS1501-151 Gr.430A to BS1501-151 Gr.430A
3. SA-516 Gr.70 to SA-516 Gr.70
The company that will do the welding say they only have a WPS/PQR available for (3.) and wish to know if they can use it for (1.) and (2.) as...
Hi,
The model being analysed is that of a lifting lug welded to the bottom ring of a support ring halfway up along the vessel.
In the FEA results I am reviewing, the overall von Mises stress plot comes out as 614.99MPa. The person doing the FEA then took a Stress Classification line at this...
I received a concession request from our tank manufacturer to install two roof nozzles (8") on a tank with a conical bottom after the waterfill test.
Reason for this is that the tank will have precision engineered rotating internals, and we want to minimise exposure to liquids etc. to limit...
