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,
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...
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...
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...
Hi,
I have the following problem: The design of a new tank calls for steam tracing to be welded by continuous welding on both sides to the bottom cone of a tank which will need to ensure product inside the tank does not cool down if there is a failure.
The cone is 12mm think SA-516 Gr.60N...
In our specification to the tank supplier we specified "No marking shall be on the process side of material" as the tank is in Sour Service. However we have internals that will have to be identifiable in contact with the liquid with no unexposed sections that can be stamped.
Is low stress...
I am reviewing PQR's at the moment, and I have almost non-existant experience in ASME IX.
My question is regarding the Preheat (QW-406) section on the PQR. The PQR is for a GTAW/SMAW butt weld and the material is SA-516 Gr. 70 thickness 50mm.
On the PQR the manufacturer specified a preheat...
Hi,
Please help me with the following questions regarding field pressure testing (Vessels are ASME VIII Div. 1):
1. The supplier of a vessel to a client of ours managed to ship the vessel to site without final release inspection, and now the vessel requires major repairs (i.e. a 1200mm flange...
Hi,
My question is regarding the "uniform thickness for a minimum length adjacent to the tubesheet" requirement specified in 13.4.6.2 and 13.4.6.3 for integral tubesheets.
My calculation ends up stating that I need a minimum channel length adjacent to the tubesheet of 498mm for the channel...
Hi,
Can someone please advise on the galvanic (corrosion) potential between 16Mo3 and 15NiCuMoNb5 in feedwater?
Can somone also advise where I can find a table listing material galvanic corrosion potential values specifically with regards to EN (European) materials?
Hi,
My questions are w.r.t. EN 13445-2 and 4.
Design - HP Heater
Shell Side - Steam - Design Pressure 2 550kPa - Design Temp 350deg C
Tube Side - Water - Design Pressure 30 700kPa - Design Temp 230deg C
Design Code is EN 13445.
Channel Material 15NiCuMoNb5
Shell Material - 16Mo3
We have a...
Hi, I just want ask which EN forged material is considered the equivalent of P355NH, is it P305GH?
The issue is that we are buying Tube Sheets designed in accordance with EN 13445, but the designer specified WSTE 355 in forging material. From my searchings P355NH is stated to be equivalent...
We are in the process of tendering for LP Heaters, and the client specified hardness testing of the U-tubes to be done according to A249. The tubes we want to use will be 15mm OD and 0.8mm wall thickness.
Now, in A249 it is stated in Table 4 Tensile and Hardness Requirements that it is "not...
