What is a UL94 HB rating?

H-B Horizontal Burn Slow horizontal burning on a 3mm thick specimen with a burning rate is less than 3”/min or stops burning before the 5” mark. H-B rated materials are considered “self-extinguishing”. This is the lowest (least flame retardant) UL94 rating.

What is UL94 fuel?

UL94 is a 94+ Motor-Octane aviation gasoline without Tetraethyllead that meets the ASTM D7547 Unleaded Avgas specification. UL94 is also rated as a super-premium ethanol-free auto-gasoline with a 99 octane (R+M)/2 rating that meets and exceeds the ASTM D4814 autofuel specification.

What is UL94 avgas?

What is UL94 Unleaded Avgas? UL94 is a 94+ Motor-Octane aviation gasoline without Tetraethyllead that meets the ASTM D7547 Unleaded Avgas specification. UL94 is also rated as a super-premium ethanol-free auto-gasoline with a 99 octane (R+M)/2 rating that meets and exceeds the ASTM D4814 autofuel specification.

What color is UL94 avgas?

Grades

How is flammability measured?

The materials are placed over a Bunsen burner either vertically or horizontally, depending on the specification. During a vertical flammability test, a material is observed for the length of time it burns after the igniting flame is removed, how much of the specimen burns and whether or not it drips flaming particles.

What VTM 0?

Vertical Testing of Thin Materials (VTM‑0, VTM‑1, VTM‑2) This test is used for materials that are thin, or are too flexible or may distort, shrink or flex during ordinary vertical testing.

What is flammability index?

A flammability index is defined, using true vapor pressure, flammability concentrations and minimum ignition energy. • The application of this flammability index indicates that ethanol is much more flammable than crude oil.

Is standard for flammability test?

Scope: The flammability test is used to determine the relative rate of burning of self-supporting plastics. This test is mainly used for quality control, production control and material comparisons.

What is flammability test?

Flammability testing determines how easily a material or finished product will ignite or burn when exposed to or used near fire or heat.

How do you test for plastic flammability?

The test involves applying a flame to one end of a horizontal bar of the plastic for 30 seconds or until the flame front reaches the specified mark. If burning continues then the time taken to reach the second mark is measured. If burning stops then the time of burning and the damaged length are measured.

Does avgas burn hotter?

The first is that a two stroke motor will run hotter with AVgas. If anything, the opposite is the case. The higher octane of AVgas makes the fuel burn slower and more efficiently. Also the lead in AVgas helps to dissipate heat and acts as a lubricant.

What is the UL 94 V test criteria for flame safety?

Flammability rating UL 94 V Test Criteria V-0 V-1 V-2 Burning time of each individual test spe ≤10 ≤30 ≤30 Total burning time (s) (10 flame applica ≤50 ≤250 ≤250 Burning and afterglow times after second ≤30 ≤60 ≤60 Dripping of burning specimens (ignition no no yes

What is the highest UL94 rating for surface burn?

UL 94-5VA Surface Burn; Burning stops within 60 seconds, test specimens MAY NOT have a burn-through (no hole). This is the highest (most flame retardant) UL94 rating. UL 94 V-2 Vertical Burn; Burning stops within 60 seconds, Flaming drips ARE allowed.

What is the difference between UL 94 V0 V1 and V2?

UL 94 V-0 Vertical Burn; Burning stops within 10 seconds, NO flaming drips are allowed UL 94 V-1 Vertical Burn; Burning stops within 60 seconds, NO flaming drips are allowed UL 94 V-2 Vertical Burn; Burning stops within 60 seconds, Flaming drips ARE allowed.

What does UL94 stand for?

UL 94, the Standard for Safety of Flammability of Plastic Materials for Parts in Devices and Appliances testing There are two types of pre-selection test programs conducted on plastic materials to measure flammability characteristics.