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XALIX
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Join Date: May 2011
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Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/18/2013 11:30 AM

Dear Friends,

we have an atmospheric open water bath container (approx. 25 m³). We direct heat the waterbath with a simple 3" steam lance (pipe with mulitple 6 mm holes). Before the lance we have a control valve. The steam operating pressure is approx. 4.5 kg/cm²a while the design pressure is 8.1 kg/cm²g.

At the first step we assumed that IBR is applicable up to the control valve. However, in discussion it came up that, due to back pressure (if above 3.5 kg/cm² g) in the lance the whole atmopheric open water container including any down stream piping will fall under the rules of IBR. And addionally the cryogenic liquid coils.

I ask for recommendations how to fix the limits of IBR and if applicable how to design a atmopheric open equipment acc. to IBR.

Are there any ideas how to avoid IBR downstream the control valve?

Thanks for your reply.
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bigg
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#1

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/18/2013 12:43 PM

Reduce the back pressure in the lance? Possibly by reducing the flow rate. If I correctly deduce your system, the liquid coils probably still fall under some pressure code.
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XALIX
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#4
In reply to #1

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/19/2013 2:20 AM

Liquid Coils will be acc. to ASME.
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Tornado
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#2

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/18/2013 4:43 PM

You should be asking about downstream of the lance perforations.

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Mike W
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#3

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/18/2013 5:16 PM

Larger/more holes in the lance?

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XALIX
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#6
In reply to #3

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/19/2013 2:28 AM

Change the number/size of holes will have negative effect to the performance.
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PWSlack
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#7
In reply to #6

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/19/2013 9:33 AM

How?

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XALIX
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#5

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/19/2013 2:26 AM

The question is also, what will be limits of IBR if the back pressure under design conditons (8.1 kg/cm²g) can not be reduced below 3.5 kg/cm²g.

Is it only the lance, or is IBR required for the whole waterbath container and if very worst also for the coils for cryogenic liquid.

Thanks again.
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PWSlack
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#8

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/19/2013 9:36 AM

The back-pressure in the lance is a function of the flowrate and the immersion depth. The delta-P at each nozzle is a function of flowrate and fluid properties; the immersion depth is insignificant.

As far as the Pressure Systems Regulations go in the UK, the lance, being formed of perforated pipe, would be exempt.

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pritam
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#9

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/24/2013 10:22 AM

What it matters to use IBR piping, a few more metres in length in the downstream of control valve? It's a pity question.

And addionally the cryogenic liquid coils.

Cryogenic liquid coils never fall under IBR. It's generally made of seamless SS316/SS316L pipe.
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XALIX
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#10
In reply to #9

Re: Indian Boiler Regulation (IBR) for CRYOGENIC Steam Heated Vaporisers

09/24/2013 11:06 AM

Dear Pritram, thanks for your needful reply.

The attached piping is not the problem. I have more doubts regarding the atmospheric open waterbath container with all the attachments.

Do you have an idea how this will be handled by IBR?
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Users who posted comments:

bigg (1); Mike W (1); pritam (1); PWSlack (2); Tornado (1); XALIX (4)

Previous in Forum: Pipe Internal Pressure Calculating   Next in Forum: Fab Drawings for Stevenson Fog Bell Apparatus

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