Replacement of CS Pipeline with FRP

What is in the pipe? Temperature and pressure?

You've left out one of the most important things - what is the fluid? Also is the pipe above ground or buried?

Cheers.........Codey

What is a rubberlined CS pipe (carbon Steel ?)

If your application is the same as in previous post, then find out whether the FRP for that temperature is available?

Again did you try to find out why the pipeline is failing?

The internet can not give you answer for all the problems. We can advice you if you come out with specific problem, a portion of. rest you must study and find out.

Yes, the fluid is High solid slurry (>30%) and temp and presssure are 85 and 1000Kpa respectively located above ground on Pipe Racks.The previous line is failing due to break down of rubber lining, Any idea about any specific standards for smooth replacement of this Pipe.

Why rubber-lined? Why not something else like PTFE or ceramic lined which are better abrasive resistant for slurry applications.

You have not yet given two vital informations. (1) What is the fluid? Depending on the property of fluid to be handled, find compatible material for pipe or lining. (2) What is pipe size you need? Materials like FRP may have size limitations.

I mentioned in my previous email, fluid is slurrry, high viscosity and pipe dia 250mm. FRP available in that size

You said it's a slurry, but I think the query was - what's the liquid? Water? What pH?

What particle size are the solids? I understand that for size up to 6mm rubber stands erosion better than hard material, but above that it's the other way round.

What happens when the rubber breaks down? Does the CS then wear through and you get a leak, or is the rubber in the slurry a problem?

I'm not convinced FRP would be any better than rubber-lined. Have you considered PE or PP pipe? They're both pretty good for abrasion and easy to install with socket-fusion couplers. Or maybe CS with polyurethane lining instead of your current rubber.

Codey

There are abrasion resistant FRP piping systems with 40% Silica Carbide liner (up to 150 mil) to be taken into consideration.

Exactly, thats the material we are considering with Silica Carbide. Slurry is acidic in nature as we mix Sulphuric acid as a part of process.

If you could simply let me know about any available standards for FRP, that would be great. Also, for Support span calculation, do we have any FRP standards available or I can make use of the ones available for Carbon Steel??? I think as properties of FRP differ from CS, Support span calculation should be diff but needs ur opinion.

Thanks

<.....Slurry is acidic in nature as we mix Sulphuric acid as a part of process.....>

Ahah! Some useful information at last!

What is the particle size in the slurry?

Has this material been tested against different pipe materials for compatibility, and what was the outcome of these tests? Other plastics than FRP might give better performance; how have these plastics performed?

Can the slurry be neutralised before being conveyed in this pipe?

Can the slurry be dried and conveyed as a solid instead, either by truck, wheeled bin or conveyor belt? What is the flowrate of this material?

I think the answers to both of your queries is in ASME B31.3 Chapter 7.

Thanks

yes.u can go with that frp/grp. u hav to inform the fluid type to the frp manufacturere...then they can decide the resin type and etc. also, they will tell the possibility. u will have to refer frp piping design handbooks. there is lot in surfing....u can get it from frp manufacturee....pipe supports will be more in number when compare to steel piping...