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Hi guys Thank you for your replies. The application is nitrogen from cylinders to a downstream system. The pressure is 200 barg. It may not be possible to thread the pipe at site neither remove it and take it to workshop. Apart from welding ..any good connection to a pipe that is not...

Hi guys Thank you for your replies Application is nitrogen with pressure up to 200 barg

Hi , I have a 3/4 pipe closed at one end.. I need to connect a isolation valve for venting purpose. What are the best connection type to connect the pipe and the valve without having to weld (just cut the closed end and connect)? What fittings are required ? Can you refer to any standard that...

Hi , I have a 3/4 pipe closed at one end.. I need to connect a isolation valve for venting purpose. What are the best connection type to connect the pipe and the valve without having to weld (just cut the closed end and connect)? What fittings are required ? Can you refer to any standard that...

Hi guys , Can someone tell me why we use heat tracing for glycol used in impulse line in level measurement? Does the state of the glycol change with the process pressure of the vessel where level is measured? Thank you

Hi guys What standard talks about installation of instruments ? Thank you

HI How to select values for end of line resistor and terminating resistor connected to fire detector loop ? Thanks

Hi Can someone share cable spec for a heat detector installed outdoor (fire and gas cable for outdoor application) . Thank you

HI How I terminate two cables in parallel in the loop. The loop consists of detector in the field, junction box, marshalling cabinet, and system cabinet. Already one cable exists, i am adding a new cable to decrease voltage drop. Thank you

HI What is the criteria for choosing 2 wire, 3 wire, or 4 wire configuration for transmitter/field device ? Your comments please Thank you

HI danw2, My device is 3 wire loop powered from the plc analog card. What would be the solution if power from the loop is not enough for the detector? Should be install an external power supply? Thanks a lot for your answers ..really useful

Hi guys, Was wrong about power connection. Detector is loop powered (not external power supply). Its a two core wire, and there's a junction box and termination panel between detector and plc. Thank you

Hi Brian Thanks . I dnt think it will be applicable in my case..

Hi Danw2 Thanks for your answer. The detector is powered by an external power supply. The symptoms are that, detector is frequently generating nuisance high alarms. It's troubleshooted as voltage drop! Apart from increasing cable size, anything else we can do , from power supply side for...

It's 4-20 ma output signal. How to solve the issue of this voltage drop please. Do we simply increase cable size or sth else?

HI How can a gas detector generate nuisance high alarm due to voltage drop. What is the relation between the two? And what is the best solution for this problem ? Do we change the detector, the cable, or power supply ? Your comments please

Thanks. What is the other system?

HI When to use intrinsic safety circuits ? Is it based on hazardous areas only or there is more to it ? Thank you

Hello I have a question around equipment certification please. When to use EX d (flameproof enclosures) , and EX e (increased safety). Does it depend on the hazardous zone or sth else? Your comments please Thank you

Hello In some transformer yards, I have seen flame detectors installed for transformer fire detection, and in some yards , heat detectors are installed. Why such a difference? I was told heat detectors are more suitable. Does it mean that flame detectors is a wrong engineering decision...