Recent content by gabriel

Thanks for your comments. Some process with chrome are not good for enviroments, so most of our customer do not accept it. Just in case, someone could be interested in the reason, the process failed because in steels with %Cr greater than 5% is necessary a previous electrolitic coating with...

The application is for ball valves, the part that I am talking about is the ball. We usually use ENP 0,025mm in carbon steel without problems. Regarding to your question, this process has been quoted, so it is not a problem. We are in Argentina. I think that the reason is related with the...

Thanks for the info. The reason is for increasing wear-resistant. The supplier told me that the process never failed in ferritic steel, so I wonder why this happen.

I need to cover a piece with electroless nickel plating on AISI 316, but for an unknown reason the process have failed several times. The supplier who have tried, told me that some times this happens in austenitic stainless steel but he does not know why. Does anybody know what could be the...

I have just looked it. Thanks a lot. Do you know if the division 2 has other way for calculating the required cross-sectional area of the bolts?

Does anybody knwo how calculate the required cross-sectional area of the bolts with internal pressure, according to the ASME code? I mean in which section, appendix, whatever. I have spent a lot of time trying to find this and I could not. But I can´t believe that an important standard, like...

Hi, I work with valves and one of our customer send me an oring specification. this file says that the index (or coefficient) of cold is -50°C and it was measured with differential scaning as per VNA 675116. I have never heard something about it. thanks

Many thanks for your answers, they were really helpful and also the pdf.

Hi! I am working with ball valves and I need to calculate the cv for several sizes. I only knows the pressure drop expressed in terms of the "equivalent feet". Unfortunally, I do not have a lab to measure. thanks a lot!