Hi folks,
I have an existing PQR performed with alloy 800 plate and welding consumables. All of the mechanical tests were performed at room temperature.
I now have a new project that I am considering using this PQR and deriving a wps from. However, the design temperature of the new project is...
Hi folks,
Thank you for the replies. It seems from some of the replies that I did not phrase my question correctly.
Design pressure is 2980 psi, ASME test pressure is 3874 psi and PED test pressure is 4,261 psi. I am not seeking to calculate or check the test pressures as these have already...
Good afternoon folks,
I would like to ask a question if possible please relating to the use of ASME VIII Div 1 for calculating component thicknesses at hydrotest.
We are currently designing a shell and tube heat exchanger to ASME VIII Division 1 and the design pressure is 2980 psi on the...
Hi folks,
Just a quick question to ask if there are any specific concerns that need to be cosnidered when welding Carbon Steel components together for nozzles, dished ends etc in Nitrogen service. Design temp is minus 20 deg C and the operating pressure is less than 4 barg.
We are using P1 or...
Hi folks,
As an experienced manufacturer of more than thirty years I can confirm that no AI or U Stamp team will ever allow us to manufacture to anything other than the mandatory edition of the code at the time of order placement. Twice during our three year audits we have been asked to display...
Hi folks,
Our company is well used to checking through certification of ASTM materials for ASME U Stamp applications. However, my question is as follows;
Our client wishes to utilise ASTM A270 tube for a polished heat exchanger. He could get the material dual certified to ASTM A269 (the...
Hi folks,
Just finished manufacturing a pressure vessel in Chrome Moly material including PWHT. Prior to hydro the client wants to add a welded earthing boss to the foot of the vessel i.e. not the pressure envelope.
Would I be ok to preheat the area of welding and the boss then weld as per my...
Hi folks,
I am about to start manufacturing a pressure vessel in Copper Nickel 70/30 material. We have lots of existing qualifications for the 70/30 material but the end user now wants us to weld test pieces and gain qualification for 4mm fillet welds joining the following;
P1 material to the...
Hi folks,
I have received a question from one of our inspectors relating to the use of marker pens on Stainless Steel and Titanium. Can anyone please advise if there are any standards relating to good practice etc when using markers on these materials. In particular, are low chloride markers OK...
Hi all,
Just a quick question as posed to me today by a coilleague. What would happen if you poured a bucket of cold water directly onto a stainless steel butt weld the intstant that the welding has been completed?
Is the answer the same for most grades in the 300 series of stainless steels or...
Hi folks,
I am currently looking at a possible project where we need to weld some 40" NB nozzles onto the side of a vessel which is 56" NB. Is there any references, books or websites that would offer guidance on placing internal 'star' stiffeners into the vessel prior to welding the nozzles so...
Hi folks,
Could someone give me a quick pointer to advise me if it is possible to design eccentric cones to ASME VIII Div 1. Is there an example calculation with formulas in the codebook etc.
Any help you could offer would be greatly appreciated.
Chas
Hi folks,
A lot of good information supplied by many people across the forum. Chaulklate is spot on for the relationship between user knowledge and trusting input/output data. I run S&T design courses for our new employees and still struggle to get across the message that the software is a tool...
Hi folks,
I am looking to put out enquiries for Carbon Steel forged rings for us to machine into girth (body) flanges on some heat exchangers. Does anyone know of some good reliable US or European suppliers who can supply rings up to 85" OD x 7" thk in A105N material.
Any help you could offer...
Hi,
First confession - I am not using compress.
What I am doing is designing lugs for local loading on a heat exchanger shell and I am trying to find a good worked example of resolving lifting forces and moments for chain angles of 30 degrees and 60 degrees etc. I have already designed the...
