2 replies to this topic

[Blesson]

hi All, 

Can any one suggest the suitable seat material type (metal-metal or soft seat) for ball valves used in  natural gas service pipeline having issues of black powder(powder accumulated at valve trims/scrubber wall etc) ? 

Edited by Blesson, 10 October 2016 - 03:20 AM.

[ankur2061]

Hi,

 

Go for a metal-metal seat. Metal-Metal seating has now improved to the point where it nearly matches soft seat. One of the main advantages is that if you need to pig your pipeline, a metal-metal seat will remain relatively undamaged compared to soft seat.

 

There is a very good article on "Black Powder in Gas Pipelines" on Wikipedia. Here is the link:

 

https://en.wikipedia...n_gas_pipelines

 

Regards,

Ankur.

[Blesson]

Thank you Sir