Dear all,
Do any of the following services require normalized plates, forging and fitting ?
1. Caustic service
2. Acid service (H2SO4)
3. Lethal service
4. Hydrofluoric (HF) Acid service
5. Any other services require normalization if you know of ? (Wet sour service is yes)
I try to put all...
Dear all,
Anyone who has purchased pressure vessel outside of BC Canada and shipped to jobsite in Canada, would you please advise the following :
1. Does the purchase order package (which contains specifications, standards, vessel data sheets or drawings) require PE registered in BC Canada to...
Dear,
Please see the attached sketch. Shall the body flange between vessel and heat exchanger be TEMA R Class confined joint or a regular ASME B16.47 flange is ok ? Our heat exchanger engineer insists a custom made TEMA R Class confined joint...
Dear,
Please see the attached sketch. Shall the body flange between vessel and heat exchanger be TEMA R Class confined joint or a regular ASME B16.47 flange? Is it mandatory to be TEMA R Class confined joint...
Dear all,
Is it necessary to use full penetration weld for welding support ring, beam seat, support clips of platform/ladder/pipe to vessel wall where thickness is greater than 50 mm ?
Any difference between CS and SS ?
This question is only for general service vessel, not for special...
Dear all,
First time seeing a spec saying austenitic service bolts shall not be used in shop hydrotest. We have stainless steel vessel with stainless steel service bolts for manways and blinded nozzles. Any reasoning why SS service bolts shall not be hydrotested ?
Dear all,
We have several large diameter horizontal vessels: 21' diameter x 72' long. No lifting lugs were welded to vessels. CG and weight are known. Only sling(polyester fiber rope) will be used around the shell for lifting. Vessel vendor did not specify lifting points, but it is very easy...
Dear all,
I have a new CS vessel with several pad nozzles. Vendor painted the threaded bolt holes with primer, mid and top coats. I am afraid it can cause issue when installing stud bolt to connect to external valve at site. Shall I ask vendor to strip the paint and apply rust preventative...
Dear all,
A vessel hydrotested,U-stamped and shipped to site, then found 3 mm deep dent on external jacketed half pipe. Half pipe was made of 3" CS pipe with 6 mm minimum thickness. Photos attached. What will be the criteria to justify that it is good for service ? Thanks...
Dear all,
I have a lug supported fully insulated vessel. Operating at 100F for 10 days, then go to regeneration at 500F for 2 days, then idle for 8 days. So a full cycle is 20 days. Very easy to calculate how many cycles for 30 years. But our client is saying I need to consider Table 5.8 for...
Dear all,
We have new vessel with standard bolt length for body flanges and manway. Client requests to use longer bolting for bolt tensioner at jobsite. It is too late to replace with longer bolt for the shop hydrotest.
Can it be hydrotested with the standard bolt length, then after shipped to...
Dear all,
We have an US vessel supplier refuses to comply with EEMUA 190 for material properties and test requirements after purchase order already placed. Before PO, they did confirm they will comply.
What their claim is: plant is in US, so only need to comply with ASME Div.1 requirements...
Dear all,
We have an US vessel supplier refuses to comply with EEMUA 190 for material properties and test requirements after purchase order already placed. Before PO, they did confirm they will comply.
What their claim is: plant is in US, so only need to comply with ASME Div.1 requirements for...
Dear all,
A current project in Texas we are looing for whether code stamp U or U2 is mandatory in Texas or not. Can anyone help with source or jurisdiction stating it is not mandatory ?
Below link is NB-370, National Board Synopsis. Attached table is from the website. Does it mean code stamp...
Dear all,
I have a SA-105 manway which has a 304H SS manway plug and bolted to flange as shown in the attached sketch. Design temp for flange is 650F and gas phase. What will be the better choice for bolting and lock washer material ? 13 Cr or 304 SS ...
Dear all,
Div 2, Table 4.4.1 sets the 800 F limit for many commonly used materials for compressive stress, that means I can not use the materials that I used to use if temp is exceeding 800F unless I switch to Div 1.
The compressive stress will occur at design temperature from weight, wind...
Dear all,
Can anyone provide some guidelines how to prevent sigma phase embrittlement on welds for 304H SS.
This is for part in 1450 degF design temperature.
Dear all,
We have a slender C.S. equipment that is designed per Div 2, Class 1 to meet design pressure and specific metal thickness for heat transfer purpose. If using Div. 1, it will be too thick and not fit the purpose.
On the vessel body there is an expansion joint the material is...
Dear all,
I have a question for the code equations 4.3.46, 4.3.47 and 4.3.56.
If I am using 12 mm thk for small end, large and, and cone, it meets all equations and internal pressure.
However, our Licensor/Client asks us to use 36 mm thick based on their standard design for this specific...
Dear all,
We will have vessels built to ASME Section VIII, Div 2 code for a plant in Alberta, Canada. The vendor will be from overseas.
What will be the specific requirements from the Alberta local jurisdiction (ABSA) that the vendor shall follow ? Thanks for your help.
http://www.absa.ca/
