According API 650, Table 7.1a, Minimum Preheat Temperature (MPT), if 32mm < Thickness <= 40mm; then MPT is 10°C for Material Groups I, II, III & IIIA and MPT is 40°C for Material Groups IV, IVA, V & VI.
Paragreph 7.2.1.3 shall be take count.
Material Groups are indicated in Table 4-4a.
Jayadev1979,
If your vessel need stamping & registration, Appendix 13 of ASME Code Section VIII, Division 1 is an option, that Appendix include REINFORCED VESSELS OF RECTANGULAR CROSS SECTION (par 13-8).
I suggest you contact to a manufacturer that holding an ASME Certificate of Authorization...
Syahar1975,
Because the EGW process will be used, only one pass is required for vertical welding.
I think the extra work proposed is not necessary, because for 23 mm thickness single-V-bevel could be used. I have seen that double-V-bevel is normally recommended by EGW equipment manufacturers...
Dear Sirs,
I work for a company that produces tanks, vessels, structures, etc. Our client have contracted a third companie for the Quality Control of theirs products.The supervisor say that all NDT procedures (VT, PT, RT or UT) must be signed by a Level III Inspector, he say that it is a...
sgarro... Do you sure that material spec is ASTM A506 Gr 70?... I think that ASTM A516 Gr 70 is correct specification, also I suggest you will be indicate us the final service for this steel penstock.
Some applications include the water conduction for hydropower generation (fall water), if it...
Thanks IFRs, I attached a sketch for clarity. Area with red cloud on drawing show the condition about my question.http://files.engineering.com/getfile.aspx?folder=c0c72459-d67b-4d34-95e8-b71724f6f3ed&file=Bottom_plate_layout.dwg
In API-650 11th Ed, paragraph 5.1.5.5 says: Three-plate joints in the tank bottom shall be at least 300 mm from each other and from the tank shell. Do I understand that distance is referred to the inside of tank shell?
I have this case: distribution of plates for butt-welded tank bottom (shop...
Only for complement to JStephen, annular plates are locate in periphery of tank bottom and the shell rests over these ones. Skecth plates could be located over annular plates for complete the bottom tank without bearing the tank shell. See API 650 11th Edition, Add 2008, paragraphs 5.1.5.4, 5.4...
Metengr,
I know that the heat is harmful for duplex stainless steel, so I want minimize the heat input on the weld seam. With ceramic backing, I avoid the heat input for both back grind and back weld.
Sirs,
Please if somebody could send me information or comments about the advantages or disadvantages of use the ceramic backing for welding on duplex stainless steel (ASTM A240 type 2304). We construct storage tanks for mining industry and the weld for both sides are possible, but we thinking...
Thanks Sirs,
I'm not pressure vessel engineer design, I work for a construction company, a client sent us a detail drawing for this job, my problem is... how request bids to flange suppliers?, obviously they need data about material, dimensions and ratings standards.
The reply of SnTMan and...
