Hi,
I have a flanged (weld neck) 4"NB nozzle (set on) in XS pipe on the side of a small pressure vessel.
My customer wants to insert a measurement device in through the flange/nozzle into the vessel, but the outside diameter of the instrument is 100mm, which is bigger by about 3mm than the bore...
Hi,
I have an 2205 duplex welding procedure that allows me to do butt welds under ASME code.
Can I use this welding procedure to do the same welds in 316 stainless steel, or do I need to do a 316 specific procedure ?
The duplex procedure certificate seems to suggest that the 316 P numbers are...
I am laying out a piece of 304 stainless steel equipment with a set through nozzle on an end cap.
My client wants 100% radiography but I am unsure if/how radiography would be done on a set through nozzle in an end cap - its a 4"NB nozzle in a 10"NB end cap, all standard weight thickness.
RT on...
Hi,
I have an ASME VIII Div 1 vessel where I need to place a pad for a support over a circumferential head to shell weld.
I understand that it is acceptable, with suitable radiography, to put openings across welded seams, and by inference, a reinforcing pad for said opening which would of...
Hi,
If I have a set-on nozzle on the side of a cylindrical vessel where the hole in the vessel is smaller than the internal diameter of the set-on nozzle, do I use the actual hole diameter for the reinforcement calculations or do I stick with the internal diameter of the nozzle that is set on...
Hi,
To qualify a welder to weld a set through nozzle on an ASME VIII vessel can I rely on a butt weld procedure that covers the thickness of the vessel, or I need to do a nozzle/plate procedure ?
The nozzle is 2"NB XXS and the vessel is 10"NB XXS in 316 stainless.
I am just trying to set...
Hi,
Where a client wants a vessel made from A516-70N can you achieve that by heat treatment, or do you have to ensure that the steel has the N on the origianl mill certificate ?
I understand what Normalising is, what it does etc etc - this is really a question about certification.
Hi,
I have some piping thast is being desinged and built to ASME B31.3.
The designer has got me doing penetrant dye inspection of all the attachment welds, so support brackets, welded pads etc.
This seems excessive to me,
Can anyone point me at the justification for this as I can't find the...
Hi,
If I have a simple vessel with water in it, say 1000mm dia by 2000mm o/heads.
Under any and all operating or fault conditions that we can identify the PRV, if set at the MAWP pressure for the tank, would never operate.
However, if there is a fire the water will get heated and could turn to...
Hi,
I have been looking at an FEA analysis of a pressure vessel that is to operate at 35,000 psi.
It is a spherical vessel and the FEA shows a stress gradient across the wall of the vessel from the id to the od, with the stress level exceeding the allowable value at the id, whilst at the od the...
Hi,
I am new to CAESAR and have been looking at static and dynamic analysis of piping.
What I am seeing is lower stress levels reported for a dynamic analysis than for the static analysis on the same system.
The program seems to produce separate reports and not a "composite" report and it is...
Hi,
If I have a pipe with steam flowing in it at what I think is around 200 metres/second and I want to calculate the density of the steam do I simply use the static pressure and temperature shown on my gauges (85 Psia and 330 Deg F) and pick the appropriate specific volume from steam stables...
Hi,
We are considering a job which needs some pipework constructed to ASME B31.1.
Normally we make to ASME B31.3 and we inspect ourselves, however for B31.1 can I do the same or must I get an ASME Inspector to review and inspect ?
Hi,
We have been asked to make some pipe spools with slip-on flanges at each end of the same diameter as the pipe.
The code that we have to make to is ASME B31.3.
I understand from the code that I am supposed to x-ray 5% of butt welds (for each welder) but with slip-on flanges there is no butt...
I have a supplier who wants to weld the head (10mm thick) to the cylindrical shell (8mm thick) of a vessel he is making for us by matching the outside diameters of the head and shell.
This will give a miss-match at the internal diameter / root of the weld.
Is there any rule about this ?
I...
Hi,
I am looking into pumping mud with a reciprocating pump and have decided that I will probably need some pulsation dampening. I have been pointed towards, what looks to me, like ordinary bladder type dampeners that I would not hesitate to pick if it were a clean liquid duty.
My thought is...
Hi,
I have a side branch on my 6"NB pipe which is 42.9mm i/d and 300mm long, it is terminated in a closed valve.
It is a natural gas pipe operating at 40 Barg / 15 deg C.
I am concerned that there may be some critical flow velocities in the 6"NB pipe that would cause a resonance in the side...
Hi,
For a fixed speed plunger pump operating at say 300rpm will the pump actually operate at 300 rpm exactly, or will there be some small minor variation in the speed due to variations in the motor, drive/gear train etc and if such variations exist, will they get worse over time (I assume they...
Hi,
I have a carbon steel presure vessel with a 6"NB XXS nozzzle which is terminated in a pipe cap.
X-ray of the nozzle to pipecap weld found a defect in the weld which has been repaired.
However, x-ray of the repair has shown a defect in the repaired weld (albeit not as bad as the original...
Hi,
Can anyone tell me how to work out the Field Test Pressure for an ASME VIII Div 1 pressure vessel.
I know how to work out the shop test pressure, but am not sure if shop and field test pressures are really one and the same thing.
Thanks
