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Dear metengr, Thanks for your reply. But corrosion velocity is not a problem (it is too low, Remaining life is more than 35 years) I trying to look for an ASTM G size where consider damage could be considered. If trying to calculate the lifetime of heater tubes with Creep theory, the life of...

Dear colleagues, I am performing a remaining life assessment of a heater tube made of in Carbon steel A 106, the normal temperature is around 320ºC so is not in the creep range but methallographic inspection has shown an ASTM grain size growth from 12 to 10. I would like to know if someone...

Dear Assis, Typical weibull analysis for mixed failure mode has no significance, beta do not tell what is happen. But if you use the Bi-Weibull model you can analyze them and get the combined failure frequency. RELCODE soft has the chance to analyze this problem with the Bi-Weibull distribution...

Dear, The best option to repair without PWHT is using temper bead technique. The vessel it was put on service? if yes API 510 code apply to your vessel.The PWHT is mandatory after repair if PWHT it was required by code rules. Unless the service type require PWHT Regards Fernando

Dear Maku, Yes you can perform a Fitness For Service for general metal loss by API 579. Other choice is ASME B31G. Kind regards Fernando

Dear desertfox and StructuralEIT, Thank you very much indeed. I was cleared the conceptfor meand it was how i suspected but i had some doubts regarding the beam behaviour.Yes the design is not very safe but it is the only way that there are to mount a beam inside a shelter machine. Personally i...

DEAR COLLEAGUES, I am performing a beam stress calculation (that is used to dismount a motor wich weight is 1000 pounds).The beam is horizontally supported by 5/8" bolts in three points. I have performed calculation for the beams, i have got it the moments reaction and vertical reactions on...