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@7anoter4 @waross @EnzoAus Thanks everyone for your help and I am very grateful for your contribution. All you have mentioned makes sense and really helped me understand. To me the transferred voltage is the key. Figure 12 clearly depicts how an uninsulated pipe/structure can propagate the...

Hi, There are two separate facilities with separate owners/operators and separate power systems, hence separate earthing which are not connected to each other. There are metallic pipes running between the two facilities (say one side is the buyer and the other side is the supplier) where the...

An update for those interested. I have communicated with Pepperl & Fuchs and they have confirmed this solution is absolutely alright and acceptable.

@resqcapt19 @FacEngrPE Thanks for your replies. I do not think there is a need for the manufacturer drawing. This is simply can be verified by the certificate that is issued for the IS device otherwise it would have been specified in the certificate. I work in Oil & Gas and we take chance to...

Hey Resqcapt19, Thanks for raising a question. Well, NEC does not apply in Australia. But I am keen to know what would be the issue with NEC? (PS there is a typo in the original post. It should read IEC 60079.14 but it has an extra 8 in the post.)

Hi, We have an application of sending a non-IS signal between two building, using exiting IS cabling through a hazardous area. I am thinking of using one IS barrier isolator at each end. Typically, in an IS system, there is a barrier isolator inside a safe area. The non-IS side of the barrier...

Hi, I have an application for a PSV on gas service where the tube rupture scenario results is two phase fluid (10% liquid & 90% gas). We tend to use a full port pilot operated valve, however vendor has commented that the offered valve is ASME certified for gas service only and not for two...

David, Thanks for your reply. It was really helpful. Cheers, OZI

PS: I have found this but I am looking for other resources. http://www2.emersonprocess.com/siteadmincenter/PM%20Daniel%20Documents/Theoretical-Uncertainty-of-Orifice-Flow-Measurement-techWpaper.pdf Cheers,OZ Guy

Hi, I am aware that ISO and API have recommendations on straight run requirements of DP flow measurement using orifice plates, but is there a published work about expected maximum uncertainty if such recommendations are not observed, e.g a graph or a table? I have been asked to specify the...