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Level 3 is a FEA and before going there, I want to know for other criteria available. If I have no choice, the FEA will be the solution. Thanks

That seems a possible cause of the problem. Now, what code or calculation guide can I use to evaluate the damage I have. Dents are not deep, maybe 1 to 2 inches maximum.

I have a 35 ft atmospheric tank which shows some dent (inward deformation). Bulge would be a better word but bulge is for outward deformation. How can I evaluate them for integrity and return in service ? API 579 don't include cylindrical with more than 42 inches diameter...(section 12). Can...

Could anyone send me a sketch or picture of a ''davit'' clips, which I really don't know what it is ? I'm reading API 653 Annex C checklist for my first inspection in the next weeks, but I'd like to know what are ''davit'' clips on C1.3.2 for example, and this before I go on site. Thanks Ced

JJ Pellin, I'm glad to hear your story because it looks like our case. Thanks a lot. Indeed, the inner race was melted and balls were indented on its surface. Outer race was good. So, your story fits with our case and confirm that lack of lube is a real mess at high speed and high load...

Hi I would like to know the typical destruction scenario of a bearing (ball, approx 2 in., no trust) having lack of lubrication (almost no lubrication at all). For example, inner ring is rotating (fit on the shaft), outer race is fit in the casing, no rotation. RPM = 3600 1- How much time it...

But is there any rules that allow me to make the change without any more calculations ? It is a 1000 ft line in the aire with difficulty of access. I want to make the calculations only if necessary.

Hi We have some corrosion problem in my acid piping and I would like to increase the pipe schedule from SCH 10 to SCH 40 for 3'' and 6'' diameter (SS316L). I want to know if the increase in pressure drop (lowering the ID) will affect my pump (total Head). Is it significant ? How can I...

Thanks for your help

Hi We received this morning a hot water pump at the shop, pumping to pressure over 300 psi. It is a 3 inches pump in Cast iron. We found a crack in the casing. Is it included in ASME pressure vessel Code ? Do I need to use a qualified procedure, welder, etc.. I just want to know if I can...

Thanks for the tips.... Here are some more informations... - Good idea about getting more distance between both u-bolts to give more stiffness to the assembly. - Plate of blades holder was in carbon steel. Bad corrosion from sulfuric acid environment forced to change for stainless 316L. It...

Hi I'm working on the case of our cooling tower fan (Hamon-Sobelco fan) whom brake in the blade holder (good term?). Blade holder is cracking at bolt hole (which retain blades) and advance in fatigue propagation. It is 40'' diameter and 1 inch thick. What could be the cause of failure ...

...as the filler metal. Welder will not be able to weld P8 for example (which is SS) if he is qualified P1 with filler metal F4, filler metal for P8 is F5 !!! So he can weld P8 but with the same filler metal than qualification on P1...isn't amazing... So , if I'm all right, this is an...

Hi I did a procedure qualification, here in Canada, P1-P1. I used CSA G20.1 44W (low carbon steel) plate for my RMS. The inspector said that 44W is not a P1 as ASME code. My metallurgical consultant said yes (he said to me to use that one). 1- Is there a place in the code where 44W is...

I need to know the best hardness for my industrial 50 mm diameter shaft in AISI 1045 material. I don't wanna be too hard because I don't need strenght, I need wear resistance (with the key). I was thinking around 30 HRC. Is it too brittle ? Cedric

Who know MONDI pipes (cast iron) ? I want to know what is the type of graphite in the structure of a MONDI pipe. Is it spheroidale (ductile), flakes, big flakes, ??? We have pipes from few supplier but we can not know which one is which. The only thing we know is that MONDI pipe is good for...