Where the two scales do meet
On this page14
The scales are independent
A flashpoint is about the contents and a rating is about the wall, and neither figure constrains the other.
But the environment acts on both
A hot car, a shed in summer, a cupboard above a stove. One temperature, two consequences.
At 120 F a 120 F container is at its limit
146 of the 208 containers here. Which is a realistic temperature inside a closed vehicle.
And at 120 F a flammable liquid is well above its flashpoint
Because the flammable band stops below 100 F. A liquid in that band is giving off ignitable vapor at 120.
So the same ambient temperature does both
Softens the container and vaporizes the contents, which is the one place the two scales are usefully read together.
A combustible liquid is the interesting middle
Flashpoint at or above 100 and to and including 150. At 120 F some are above their flashpoint and some are not.
Which is why the actual figure matters
Combustible is a band, not a number. A product at 105 F and one at 148 F are both combustible and behave differently in a hot shed.
And our data gives none of it
We publish a container rating. We publish nothing about any product's flashpoint, because the product is not ours.
So the pairing is the buyer's to make
Flashpoint from the product's own documentation, rating from our product page, and the ambient temperature from the use.
Three numbers and we supply one
Which is the honest division and is the same shape as the pet food slack fill arithmetic, where we supply one term of two.
The 33 containers rated to 300 F are the margin
Not because of flammability but because they tolerate a hot environment without approaching their own limit.
And the 29 at 190 F are the middle option
Which is above any of the three flashpoint bands and well short of 300.
Read the ambient first
Because it is the number that acts on both scales, and it is the one nobody writes down.