Letdown station 6

[Joud medo]

Hi
I am Utility Shift team leader and we have steam letdown station but one of the valves stuck opened and can not isolate it to hand over attemperator valve to maintenance , my question is Is there any technique to isolate the valve online ?

 

[shvet]

@Sameh Elsayyad
Why do you ask instead of googling a bit?
Traditionally limited from 4” (ND 100 mm) to 12” (ND 300 mm) pipe, this method is now available for larger diameter pipes, from 14” (ND 350 mm) to 46” (ND 1150 mm). ... HTP stops are effective at temperatures up to 370ºC (700ºF) and pressure ratings up to 1480 psi (102 bar).

https://furmanitehk.com/wp-content/uploads/2020/11/Hot-Tapping-and-Line-Stopping.pdf

 

[0707]

If you have enough space even 18 inch can be hot taped! What is the temperature and fluid service of your piping system?
Temperature, service and pipe material are the only limitations

regards

luis

https://www.safetynotes.net/hot-tapping-safety/

https://www.google.com/url?sa=i&url...ved=0CBAQjRxqFwoTCPiD05b1kIEDFQAAAAAdAAAAABAE

https://www.api.org/oil-and-natural...-and-plant-safety/occupational-safety/rp-2201

 

[Joud medo]

Flow is superheated steam
Temp 235 c
Pressure 10.5 bar
Pipe material : CS

 

[0707]

go to

https://furmanitehk.com/

 

[Joud medo]

Thanks