TAN Limits

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All;
What is the preferred method to monitor TAN Limits? Hard Limits, Statistical, or Linear Aggression? What are advantages and disadvantages. If my memory is correct Noria at one point in time recommended an increase of 1 was warning and 2 was critical. Any input is greatly appreciated.

8/15/111:05 PM

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cristianschmidMember

CRB

Limits for TAN will depend on the application. For example for Steam and Gas Turbines, a very good guide in reference of limits is in ASTM D-4378. Most of the Turbines OEM's fix their own limits according to this normative.

What is your application?

8/16/117:08 AM

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crbMember

Cristian;
Our application is in a steel rolling mill using PAOs, Synthetics, and mineral based oils, hydraulic to gearboxes.

8/16/1112:26 PM

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dcbMember

TAN of hydraulic oil new should be always less than 1.
Our DNR Corp HYD oil68 has TAN of 0.00022 means if it gets mixed with metal working fluid than also it will not contaminate MWF.Hence life of MWF will increase drastically. In case of injection machines this oil will outperform because to reach tan of more than 1 it will take around 10000 hrs.

DNR Corp
91 22 9820229229.

12/4/119:39 PM

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