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?