About FMVSS302 (REPETITION)

Please can anyone tell me in which frequency I have to burn plastic material for automotive use (The part is inside the car).

Is it sufficient to burn the material once or eventually once a jear or is there a correlation between the burning rate and the frequency we have to do the test.

Sincerely Yours

Burner

You have to do testing at the frequency required by your customer.

Does anyone know what the title of FMVSS302 is and/or whose document it is?

Does anyone know what the title of FMVSS302 is and/or whose document it is?

FMVSS 302 (http://storkview.storksmt.com/specsite/newspecdetail.asp?topic=FMVSS_302&sid=297)

Thanks, Jim!

Summary:

Standard : FMVSS 302

Title : Federal Motor Vehicle Safety Standard: Flammability of Interior Materials

Description:
The test is conducted inside a test chamber where the test specimen is mounted horizontally. The exposed side of the test specimen is subjected to a gas flam from underneath. The burnt distance and the time taken to burn this distance is measured during the test. The result, the burning rate, is expressed in mm/min.

Thanks, Jim!

Summary:

Standard : FMVSS 302

Title : Federal Motor Vehicle Safety Standard: Flammability of Interior Materials

Description:
The test is conducted inside a test chamber where the test specimen is mounted horizontally. The exposed side of the test specimen is subjected to a gas flam from underneath. The burnt distance and the time taken to burn this distance is measured during the test. The result, the burning rate, is expressed in mm/min.

I guess this procedure has changed since when I had to do testing. There used to be a little pill, about the size of a saccharine tablet, that you would place on the material being tested. The pill was made of some slow-burning material, and you put a flame to it and waited for it to start to smolder, then measured the distance the material underneath it burned in a given amount of time, before self-extinguishing.

The frequency is usually dictated by customer requirements. We currently have to send a yearly flammability cert letter to GM, Ford, Toyota, Nissan and Chrysler.

The number of samples needed to test is also listed in customer specifications. As an example, the flammability method we use for GM is
GM9070P. It is used along with FMVSS302. The burn rate of your material will dictate how many samples you are required to run. Sample size can be anywhere from 2-15 samples per lot.

In our case, since some of our samples burn at a rate of 50+mm/minute, we test twice per year. And some of our samples are self extinguishing which are tested yearly.

My advice would be if you have a sample that has a high burn rate, test these more frequently until you have a fairly large data base of results. You can then adjust the number of test samples accordingly.

Does anyone know what the title of FMVSS302 is and/or whose document it is?

http://www.access.gpo.gov/nara/cfr/waisidx_05/49cfr571_05.html
http://a257.g.akamaitech.net/7/257/2422/09nov20051500/edocket.access.gpo.gov/cfr_2005/octqtr/pdf/49cfr571.302.pdf

Hello Ken K,
Thank You very much for Your Post.
Could You please spezify it more.

Is there a reglementation where I can find such a list;
where the material burn rate is correlated to the frequency of the tests.
For example:

Material burning
- slower than 38 mm burn rate has to be burned every 12 month,
- from 38 to 64 mm burn rate has to be burned every 6 month,
- from 64 to 89 mm burn rate has to be burned every 4 month and
- from 89 to 100 mm burn rate has to be burned every month.
Sincerely Yours
Burner

Hello Ken K,
Thank You very much for Your Post.
Could You please spezify it more.

Is there a reglementation where I can find such a list;
where the material burn rate is correlated to the frequency of the tests.
For example:

Material burning
- slower than 38 mm burn rate has to be burned every 12 month,
- from 38 to 64 mm burn rate has to be burned every 6 month,
- from 64 to 89 mm burn rate has to be burned every 4 month and
- from 89 to 100 mm burn rate has to be burned every month.
Sincerely Yours
Burner

Since you are from Germany, why not have a look at the equivalent German standard - DIN 75200.

Regards.

Hello Harry,

we looked at DIN 75200 and all reglementaions concerning burn rates we could find but up to now we found no hint for the frequence we have to test.

Sincerely Yours
Burner

Hello Harry,

we looked at DIN 75200 and all reglementaions concerning burn rates we could find but up to now we found no hint for the frequence we have to test.

Sincerely Yours
Burner

Neither does ISO 3795. Looks like it's a customer requirement thing as others mentioned in previous posts.

Burner, this is a report found in the web pertaining to the same issue. I hope it's useful for you.

Burner,

I have been looking at all of our flammability requirements and have found nothing regarding frequency requirements, except for the yearly test report we must submit.

Material burning
- slower than 38 mm burn rate has to be burned every 12 month,
- from 38 to 64 mm burn rate has to be burned every 6 month,
- from 64 to 89 mm burn rate has to be burned every 4 month and
- from 89 to 100 mm burn rate has to be burned every month.


Is this your current test criteria? Personally, I would combine the first two and change it to 0-50mm every 12 months. The third one would be 50-75mm every 6 months. And I would try to avoid the fourth one completely. When you get close to the maximum burn rate allowed there is no margin for error.

Hopefully, none of your samples go into that area.

What company are you supplying parts to, if I may ask?

Hello Ken K,

These test criteria come out of a copy (hand out) of a Ford Document "Qualitäts Kontroll Erfordernisse" [that means Quality Control Requirements (issue October 1983)] but up to now, we are locking for original reglementaions as we can not find hints on the frequency anywhere.

Is the yearly test report you must submit written in a reglementation, is it on the drawings of your part or were you told to do so by your customer?

If it is inside a reglementaion please tell the name.

Sincerely Yours
Burner

Hello, I'm having trouble finding a testing site for flammability for Ford, GM, Toyota, Nissan and Chrysler near El Paso TX? Our current location that we send for testing is in MI. It would really help. Thanks :frust:

Adam you can try this Duraspark Ignition On GlobalSpec - Go to GlobalSpec.com Home

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:)

Harry,

May I ask where you are coming up with these burn rates.

Here is a copy of FMVSS302 and I don't find what you are saying.

May I ask where you are getting these requirements.

Harry,

May I ask where you are coming up with these burn rates.

Here is a copy of FMVSS302 and I don't find what you are saying.

May I ask where you are getting these requirements.


Harry, I make bus seats all day long and the procedure i just attached is my bible for FMVSS302

Harry, I make bus seats all day long and the procedure i just attached is my bible for FMVSS302


This is an old thread (last year) I was responding to post#16. So I don't know if you will get a response to your question.:(

How does FMVSS 302 requirement is fulfilled for non linear dimenstions such as grease, glue, or epoxy for material used for components installed in occupant compartment, e.g. seat, lumbar?

Harry,

May I ask where you are coming up with these burn rates.

Here is a copy of FMVSS302 and I don't find what you are saying.

May I ask where you are getting these requirements.

Sorry, you must had been mistaken. I did not quote any burn rates - only ISO and DIN numbers.

Retardant standards of FMVSS 302. Upholstered models meet flame requirements.


What are your requirements or customer requirement for each component.

Please see attached file for testing procedure, that is already attached to this thread.