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Transparent pipe for high pressure application

Transparent pipe for high pressure application

(OP)
Dear all,

I am looking for manufacturers of transparent pipes for "high pressure" applications.

Typically up to max. 30 bar.
Flow typically 100 kg/h.
Typically 20 mm to 40 mm (millimeter) diameter for the pipes.

We have a non-transparent, viscous product containing hard crystalline salts, so the material should be resistant to abrasive wear. Sort of tooth paste.

Why? => We want to follow the flow behavior/paterns while inserting colorants inside the stream.

Thanks for helping,

CARF / Netherlands

RE: Transparent pipe for high pressure application

Your best bet would be a sight glass, and even that would be sketchy. I would proceed with extreme caution if at all.

RE: Transparent pipe for high pressure application

Materials that are transparent are not strong and prone to shock failure....

MJCronin
Sr. Process Engineer

RE: Transparent pipe for high pressure application

I agree with mm ...

Perhaps a high pressure rated sightglass would be acceptable .... how large must the window be for observation ?

http://www.johnernst.com/flow_indicators_p9.html#1...

You are not going to find a transparent 12 inch pipe rated for 50 bar ....

Tell us more.

MJCronin
Sr. Process Engineer

RE: Transparent pipe for high pressure application

The last time I looked for something like this all I could get was some poly Chrystal type stuff sandwiched between two flanges with long bolts and was only 6" and max about 10 bar or possibly even lower.

There just isn't any demand for it so I don't think anyone makes any.

Add in abrasive wear / scratching and you quickly won't see anything....

If you find anything then let us know, but I think this would be a very very expensive special.

I think we might have started with a solid block of nylon or similar and bored it out

The only thing which gets close would be the manufacturers of min submarine viewing domes - https://jalopnik.com/5796531/this-submarines-glass...

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Transparent pipe for high pressure application

Not sure where youre located but Metaglas has various options for 50+ barg. They state a max of 1000 barg, anyways, theyre catalogue lists 64 barg as a standard product.

RE: Transparent pipe for high pressure application

I have seen quartz glass windows in high pressure applications.
Look up some of those guys (like Schott).

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Transparent pipe for high pressure application

What size transparent pipes do you need?

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

RE: Transparent pipe for high pressure application

And why?

A viscous material with hard crystalline salts doesn't sound transparent to me...

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Transparent pipe for high pressure application

I've had to result to Similtude for similar problems. Adjust pressure or temperature and pipe size until you get Reynolds Number and Froude Number (or Weber Number) to match your high-pressure big-pipe. The last time I did it I found some polycarbonate in 3/4 inch that I could match the three non-dimensional parameters at a pressure below the MAWP of the clear pipe to an 8-inch 15 bar system. This might be a touch harder with a Bingham Plastic, but if you can ignore the release stress it should work.

David Simpson, PE
MuleShoe Engineering

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist

RE: Transparent pipe for high pressure application

OP wrote "Typically 20 mm to 40 mm (millimeter) diameter for the pipes."

RE: Transparent pipe for high pressure application

What is the point of transparent piping when the product itself is non transparent - how would you know the radial mixing profile for this colorant downstream from the point of the injection nozzle ?

Have you tried the specialist folks who do CFD ( computational fluid dynamics ) studies ?

RE: Transparent pipe for high pressure application

I would never, ever, use transparent piping at high pressure in an erosive service- unless the application was 100% safeguarded against the likely failure.

RE: Transparent pipe for high pressure application

What sort of length are you talking about?

For say 150-200mm I would find a solid block and then machine out your tube.

30 bar though seems quite extreme for such a purpose.

Oh and you've been around ET long enough to know you should answer questions as they come up, not amend the original post unless there was a mistake - it makes the post difficult to follow.

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

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