What is a UL 94 HB rating?
UL 94 is a plastics flammability standard released by the Underwriters Laboratories (USA)….UL 94 Classification and Flame-Retardant Thermoplastics.
| UL 94 Rating | Definition of Rating |
|---|---|
| HB | Slow burning on a horizontal part |
| V-2 | Burning stops within 30 seconds on a part allowing for drops of vertical flammable plastic. |
What does UL 94 v2 mean?
UL 94 V-2 Vertical Burn; Burning stops within 60 seconds, Flaming drips ARE allowed. UL 94 H-B Horizontal Burn; Slow horizontal burn test (H-B) are considered “self-extinguishing”.
What is UL yellow card?
The UL Yellow Card (or Plastics Recognition Program) provides a digital product information card that lists substantial safety and performance-related properties for a polymeric material that UL tests to applicable standards.
What is a Class A fire rating?
Flame spread classifications are developed using the American Society for Testing and Materials (ASTM) “tunnel test.” Class A fire ratings indicate flame-spread of 0-25 and smoke developed between 0-450 and is the highest of the ratings. The Class A or Class I rating indicates superior fire protection.
What does ul94 VTM 0 mean?
The test evaluates both the burning and afterglow times and dripping of the burning test specimen. The material will be rated: V-0: if flame extinguishes within 10 seconds with no dripping. V1: if flame extinguishes within 30 seconds with no dripping. V2: if flame extinguishes within 10 seconds with dripping.
What does VW 1 mean on wire?
vertical flame rating
VW-1 is a vertical flame rating that measures the resistance of insulating materials to the propagation of a fire. The test involves mounting lengths of wire vertically in a ventilated chamber and attempting to ignite the wire with a gas flame.
What is a yellow card production?
Yellow-Card Productions shall be defined as those major stage events which employ stage technicians under traveling agreements with the International Alliance of Theatrical Stage Employees and Moving Picture Technicians, Artists, and Allied Crafts of the United States, its Territories, and Canada (IATSE).
Is Class A fire rating better than Class C?
A combustible material will be rated as Class A, Class B, or Class C based on its performance in this test. A material rated as Class A would have a lower flame spread, and therefore a better performance rating, than a Class C material.