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Could anyone please advise me on which Code or Standard has stated that the corrosion allowance does not need to be considered for the inner pipe of a double pipe exchanger? Additional, I have an exchanger design consisted of a few series of double pipes. The inner pipe will be extended out of...

Hi Speco, Your words calmed me, thank you. Yes in fact I have wrote back to the customer for more information yet they replied that "the thrust block is nothing but the construction same as sliding plate assembly". Any guidance for this sliding plate? Best Rgds, YL0525

Dear all, I am rather new to air cooler design. One of my customer has requested me to design a thrust block for the header box recently but I have no idea how it looks like and where to start off. Appreciate if anyone here could provide an image or sketch etc.. for this thrust block for my...

Hi Snorgy, thanks for your useful info. Now I am more concerned about the code compliance i.e. API 661 para 7.1.6.1.2. In fact I am confused whether the temperature difference of 110 degC is refering to the difference between the inlet & outlet (final) temp of the air cooler (for instance...

Could anyone there elaborate for me clause 7.1.6.1.2 in API 661 (6th Ed), see below, - If the fluid temperature difference between the inlet & outlet of the multi-pass bundle exceeds 110 degC, U-tube construction, split headers or other methods of straint relief shall be employed. For example...

Thank you brandonb73 and doct9960 =)

Joint efficiency used are 1.0 for both smls shell and smls head, spot x-rayed to uw-11(b). What if it is spot x-rayed to uw-11(a)(5)(b)?

I have a drum with bottom smls elips head joint to a smls pipe and finally welded with a std flange with blind cover. Noted that there is no longitudinal seams involved but top and bottom circ seam are spot RT. Anyone could advise whether the nameplate shall be stamped RT-2 or RT-3? Thank you...

Hi Nashof, If that is the case, you could opt for self-reinforced nozzle eg H-neck etc. yl0525

Hi Nashof, Allow me to add my little opinion here. Fatigue analysis is mainly to study the fatigue life of a product, ie vessel for your case. Since the heater is installed outside of the vessel which is in fact to heat up LNG to approx. 100ºC, you should study on the highest possible wall...

Speco, Well I have gone through the App13 and managed to figure out how the ligament efficiency is calculated. Will further study on this particular section. Thanks for your useful hint and guidance=) Best Rgds, yl0525

Hi Speco, thanks for your reply. You are right, I am making a header per ASME VIII App 13 as CodeCalc designs non-circular section based on App 13. Exactly, i will have no problem if the stay plate is a partition plate which there is no holes inside. But now my case is to have hole/holes...

Hi, I am new to this forum and would like to look for useful guide/ info on how to determine hole/holes size on stay plates which to be welded to a header box. I manage to use CodeCalc to determine the required thickness of stay plate but have no idea on how the hole/holes to be. Could anyone...