Steam vessel / pipe insulating material

Hello PM,My experience is in the boiler room and I haven't seen anything that is water or steam proof. Ins-wool,refractory materials castable and firebrick are some what resistant as in they will dry out . As a general rule insulation is on the outside of steam drums and piping,and not exposed to direct steam. The ovens I've seen have all been stainless with insulating materials in between oven wall and skin or casing. Since you are running such low pressure /temperature( actually 82c=179f =15" of vacuum) so you must be using a heat exchanger and you should be able to seal up the insulation at seams and areas of exposure with a silicone RTV hi temp or whatever. You also can get the pipe insulation ( Black foam like in a wetsuit ) at any plumbing supply or Ace or Lowe's etc. They also make fiber glass pipe insulation.Try looking up refractory in yellow pages for fiberboards, firebrick and such.

JUST MY .02 LEEP

Dear LeeP,

Thanks for your kind reply, also I came to know that one material called "perlite'. But it is so expensive. I will take up your suggestion and try to solve the problem. Again thankyou very much for your prompt action.

Best regards...........PM

Hi there

There is a material that will do what you ask but it is expensive. The material is available from a company called Microtherm BV (based in Belgium) the material is their 'hydrophobic' material and it can be applied internally but it is not an easy application. Depending on what you are processing as to whether a microporous material would be suitable (ie not in a silicone chip oven) check out the web site or give them a call.

Dear Friend,

Thanks for your reply and prompt action.

Best regards.............PM

I believe that it is hard to maintain steam at 80 degrees C. Water boils at 100 degrees C?

It sounds as if you want to insulate the steam exposed interior of the oven.

There are several refractories that will work but would be expensive. The cost of the insulation, curing (by a supplied heat source). The refractory insulation might be self curing via a chemical reaction. It can be supplied by hand pack, Gunnite (blown on), or cast.

The RCF insulation - Kaowool, Insuwool, superwool do not hold up in a high humidity atmosphere without protection such as a SS liner.

How big is this oven? What is the life expectancy?

To make steam at 80 degree C you would have to have a vacuum furnace? Or maybe - no - steam is water heated above boiling.