One Thing Is Heat Resistant And Other Thing Is Fire Resistant
Ask your customer what type of test they performed to the belt. Heat resistant is not the same as fire resistant or fire propagation resistant.
Heat resistance is the ability of the belt to withstand contact with hot material for a certain time without catching fire while fire resistant or fire propagation resistance is the ability of the belt to limit fire spread by measuring its resistance to selfsustaining fire propagation.
The first concept is focus on operation reliability while the second one is more related to safety issues.
See attached file for more information.
Regards
Attachments
10811d59-ff3e-4abc-adf8-05a09e0cdea1[1] (PDF)
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Heat Resistant Belt
Dear Mr. danishamed,
you may want (if not consulting with the supplier, what i'd consider to be first the choice) look into standard ISO 4195. However, there's the point that your customer must have specified his requirements in advance of the selection process.
Furthermore, when reliability of said conveyor is in question, it may well break down i.g. stop for some reason or other. Assuming that no auxilliary power / drive torque or anything is available, the whole load will cool down on belt. That then should imo be considered the extreme operational condition for the belt.
Regards
R. ■
Re: Heat Resistant Conveyor Belt For Clinker
thanks for the reply sirs.
the test they performed was like, they put the same hot clinker on the sample of the belt, and then waited for 15 minutes to see what happens...the belt did not get any fire, but the plies were even burned.....and the surface got cracks... ■
Re: Heat Resistant Conveyor Belt For Clinker
As others have suggested you need to get the standards for testing heat resistant belting and discuss these with your customer and belt manufacturer and suggest to them to have an independand company do the testing to see if your belt meets that standard. Another standard to review is HG2297-92.
Unless there was a very clear specification to the type of heat resistant belt they were asking for your customer got what he was asking for. HG2297-92 talks about 3 grades of heat resistance T1, T2 & T3. T3 being the best and only goes to 180 deg C with short periods to 250 deg C.
And as ppquintal says do not mix the heat resistant standards with fire resistant standards as they are completely different standards. ■
Gary Blenkhorn
President - Bulk Handlng Technology Inc.
Email: garyblenkhorn@gmail.com
Linkedin Profile: http://www.linkedin.com/in/gary-blenkhorn-6286954b
Offering Conveyor Design Services, Conveyor Transfer Design Services and SolidWorks Design Services for equipment layouts.
Re: Heat Resistant Conveyor Belt For Clinker
yeah, i can understand that, fire and heat resistant are totally independent properties, besides, i already have the test report directly from the manufacturer, which the user does not seem to believe. i beleive, it is very important if i can get sample tested by any other independent lab, that might solve and clear the issue. anyways, i thank you people very much for advicing and understanding the problem ■
Heat Resistant Conveyor Belt for Clinker
dear sir,
i sold heat resistant conveyor belt to a cement company. the conveyor belt was from dunlop betahete. after the conveyor belt was supplied, it was told to me by the user that the conveyor belt was not heat resistant, they had tested the sample. it was unblevable for me, because i had sold the same conveyor belt to other cement company who had been using the conveyor belt on hot clinker of temp peaks upto 250 centigrade. after further discussion with the user, and how the sample testing was done. they test the sample on hot clinker for upto 15 minutes straight, which resulted in cracks on the belt and plies were literally burned.
personally i think, they tested the sample for too long, because when the belt is in runing mode, for around 200 meters length belt, which is running at around 1 to 2 meters per sec speed, the surface of conveyor belt intact with clinker, will be around 50 to 100 seconds, furthermore, there r cooling showers etc....
my question is, is the sample testing was done right?? and the time duration is justified?? and how come, one factory had satisfied results at even upto 250 centi peaks and the other company claims that the sample went bad even before 200 centigrade???
i had been reading these forums from quite a long time, and i would really appreciate the technical experts...... ■