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thickness for insulation

thickness for insulation

thickness for insulation

(OP)
If there is a reference for determining  thickness of insulation on exchengers or other equipment for personel protection ?

RE: thickness for insulation

Avoid lagging for personnel protection if at all possible.  You will be buying a great deal of corrosion problems for no process benefit.  The standard to look at for insulation is a Dutch one: CINI Manual Insulation For Industries

http://www.cini.nl

Steve Jones
Materials & Corrosion Engineer
http://www.pdo.co.om/pdo/

RE: thickness for insulation

BChoate
Under insulation corrosion can become and issue when equipment is insulated for personnel protection. Typically, personnel protection considers keeping the surface temperaure below 150 F; as low as economically possible, perhaps 130 F.  Insulation requirements are calculated from a heat transfer basis (conduction and radiation)based on the process temperature, the pipe thickness, the insulation type, and aluminum covering if needed.  A link giving some information is
www.iig-llc.com
Many times, if the temperature is high enough to warrant personnel protection, there are also process benefits.  If a fluid is being heated or cooled, then the heat transfer fluid (HTF) temperature, without losses to the environment, affords a lower HTF flow rate.  Certainly, if cooling is substantially below atmospheric dew point, insulation and sealing prevents condensation on the equipment.  Safety is an important issue.  I would like to think that none of us would leave an exchanger at 400 F bare and open to contact with personnel.  If under insulation corrosion is an issue, the equipment should be primed with an appropriate thickness of a suitable primer.  In some of my assignments, stainless steel was primed prior to insulation.
Bill C.  
 

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