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dcongvt
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Hot Insulation for Engine Exhaust Pipe

07/12/2011 10:15 PM

Dear!

I have an Engine Exhaust pipe, OD=406mm, surface temp. 450 deg. C, the engine run 24/24.

Now the requirement are: layer of insulation, max. thickness 100mm must be wrap over the pipe so that outside surface of insulation is 55 deg C, insulation must be non-combustible type.

Can you recommend: type of insulation and also thermal calculation to ensure the material meet above requirements.

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lyn
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#1

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 12:34 AM

Exhaust and Header Wrap

This works.
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Rorschach
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#8
In reply to #1

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 1:51 PM

I'll give you the GA even if nobody else is listening.

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lyn
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#9
In reply to #8

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 1:54 PM

Thanks.

I actually used this stuff during my active noise cancellation days. Hot gas flows more easily so we kept the heat in the pipe with it.

Every NASCAR racer on the planet uses it, too.
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Rorschach
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#10
In reply to #9

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 2:13 PM

Yep, we use it on all of our diesel HPU and pump skids too.good stuff.

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Tom_Consulting
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#19
In reply to #1

Re: Hot insulation for Engine Exhaust Pipe

07/14/2011 6:29 PM

Used this very successfully when running souped up Chevy v8s.

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Tornado
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#2

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 12:53 AM

Coat them with 1/2 inch of Cerama-Tech?

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#3

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 4:00 AM

100mm of concrete would do.

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dcongvt
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#4

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 5:51 AM

OK!

I want to explain more. Engine is on the Top-side of well head under ABS rule, so the insulation must be: light (concrete is rejected), non-combustible, easy for installation and maintenance, ...

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lyn
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#5
In reply to #4

Re: Hot insulation for Engine Exhaust Pipe

07/13/2011 10:05 AM

Exhaust and Header Wrap
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Ca-Vin
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#16
In reply to #4

Re: Hot insulation for Engine Exhaust Pipe

07/14/2011 5:55 AM

Gee, there must be some cheap asbestos about somewhere.

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kramarat
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#6

Re: Hot Insulation for Engine Exhaust Pipe

07/13/2011 11:21 AM

Back in my Navy days we used asbestos. Worked great!

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#7
In reply to #6

Re: Hot Insulation for Engine Exhaust Pipe

07/13/2011 12:32 PM

I hear demand is down so you should be able to get it cheap.
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kramarat
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#11
In reply to #7

Re: Hot Insulation for Engine Exhaust Pipe

07/13/2011 2:26 PM

A google search has me convinced that one day I will die.

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regsoft
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#12

Re: Hot Insulation for Engine Exhaust Pipe

07/13/2011 11:31 PM

You might try this

http://www.mcmaster.com/#mineral-wool-insulation/=d6037p

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ducon
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#13

Re: Hot Insulation for Engine Exhaust Pipe

07/14/2011 3:07 AM

Rockwool, 100mm Thick, 600C, 100 kg density. Cover with GI Cladding.

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dcongvt
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#14

Re: Hot Insulation for Engine Exhaust Pipe

07/14/2011 3:46 AM

I doubt suggested material not meet my requirement (outside surface is 50 deg C). I also try the mineral wool but it not work. The most suitable is calcium silicate, but I want to find another; cheaper, ease to be supplied, ...

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niftyniall
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#15

Re: Hot Insulation for Engine Exhaust Pipe

07/14/2011 4:17 AM

You may want to look at companies like this one McKay Marine

These types of custom made insulation wraps work great; initial cost is higher; but easy to remove for maintenance. Greatly reduces the sound levels also. Easily made to get your requirement of 55C.

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dlamb11
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#17

Re: Hot Insulation for Engine Exhaust Pipe

07/14/2011 10:04 AM

Look into Pyrogel for larger/multiple installations. I buy it from Thermal Corrosion Solutions out of the Memphis, TN area. It is good for up to 800 deg C and can be used anywhere you want to wrap it. I buy the 5mm thick in 1400 square foot rolls for industrial applications. It costs about $5 per square foot for the 10 mm thick material and about $3.50 per square foot for the 5 mm material. There is a cutting fee for small orders, but it is pretty versatile and water repellent.

Hope that helps you, or someone else,

David
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lyn
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#18
In reply to #17

Re: Hot Insulation for Engine Exhaust Pipe

07/14/2011 10:29 AM

Welcome to CR4. That's good information. Probably just what the OP is looking for.

GA to you, on your first post.
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Anonymous Poster (1); Ca-Vin (1); dcongvt (2); dlamb11 (1); ducon (1); kramarat (2); lyn (4); niftyniall (1); PWSlack (1); regsoft (1); Rorschach (2); Tom_Consulting (1); Tornado (1)

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