Brine Service

[mitenpatel]

Hello,

For Brine Service application, our spec indicate to use monel N04400 materials for NPS smaller than 2". However, drain and vent valves for Monel 400 materials are way to expensive. Other alternative is to internally coast CS valves, but it's really hard to interally coat smaller valves than 2". Is there any other alternative for this application?

Thank you,
Miten

 

[trashcanman]

Plastic valves?

 

[bimr]

You need to provide further information on "brine service". Is this a frequently used process or occasional use? Is there a process risk to failure? etc.

 

[mitenpatel]

Hi,

Thank for your reply.

The assumption was made to have Chloride concentration : 10%, Temperature: 35 C, pH level: 8, oxygen concentration: 15 ppmw. However, it was found later that chloride concentration will be even less.

We are trying to find alternative for smaller valves (1/2 - 1 1/2) which will be used for drain or vent valves, and does not require to be as expensive as monel valves. They are such small size that internally coating is not feasible. Is there any alternative ?

Thank you,
Miten

 

[Afox88]

Generally, any nickel alloy would be pretty good such as inconel or hastelloy. If a customer does not specify, I tend to use 2205 duplex which is pretty good in brine service, as a cheaper alternative, assuming it can take your pressure/temperature.

 

[bimr]

If you want a metal valve, you can use a plastic or rubber lined Diaphragm valve.

http://www.cranecpe.com/chem-energy...s&brandid=6FE61C71-A9CB-D852-DEADDB2EB60F3284

These valves are also made of plastic, (PVC,CPVC,PP and PVDF)

http://asahi-america.com/valves-and-actuation/manual-valves/diaphragm-valves