Recent content by fakhfakh

You have to calculate/check the MAWP for each component of a PV including bolts. The lowest will be governing the MAWP of the item.

Dear All When checking the strength of reinforcement of connection elements (nozzle to shell/head), can some one explain why the calculation is based only on half the section? (For example: Strength of Nozzle wall shear = 3.14/2 .Dn.tn.S)

Dear All, I don't find till now even at the well known suppliers someone who gives a positive reply to the solution annealing of the complete vessel. I know that every thing is possible but in my opinion if the cost of this required HT will be close to the cost of the item it self there should...

Thanks for all

Thank you. How can we apply fun cooling on that big vessel (16m long, 1.6m Dia) ? I thought about but did not find some one having that facility on place

Dear All, Ou client requires to perform heat treatment after the manufacturing of a pressure vessel to ASME VIII Div 1 Mtrl: SA 240 310S Thick: 26 to 28mm Welded The Code do not require neither prohibit a PWHT Normally such type of mterial needs a heat treatment to a temperature 1050-1100°C...

Dear All, I've a doubt that pitting corrosion is applicable to carbon steel like SA516Gr70. Pitting corrosion is applicable to stainless steel. Carbon steel is subjected to surface corrosion Is this correct ?

Hello Accordng to ISO 9001 2015, what is required to do when planed objectves are not achieved?

Dear All, Is it prohibited by ASME Section VIII Div1 that a repad be formed at a temperature 300 to 400°C ? This repad SA516Gr70 will reinforce an opening at the knuckle of the head of a pressure vessel. The complete PV will be subjected to PWHT per UCS-56

Does the code API 650 accepts plates from coil in order to be used for shell manufacturing? If yes, in which condition ?

I'm looking for the appropriate welding consumable for ZeCor-Z and ZeCor-310M plates welding having thickness 8mm. In addition is there any specific condition for preheating or PWHT? Welding process to be used: GTAW/FCAW or SAW Thank you

metengr I still don't agree. Since SS316 accepts a very high strain and again as specified in the MR175 annealing is required only if cold forming is to enhanse mechanical proprety (to harden the steel). My be the case is applicable for dish head manufacturing

After check in MR 175 I don't agree with you Metenger that rolling is considered as cold forming since it is not designated to enhance mechanical properties. (see § 3.5.1)

It seams to be that SS316L plates are not so convenient for pressure vessels manufacturing under sour service requirments! The solution annealing of a shell after rolling requires special facilities. Am I right ?

Thank you Is it the same case for cladded carbon steel with SS 316L ?