Zhilitong Electromechanical Co.,Ltd

Product Testing Machine Manufacturer

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How to determine UL94 classed HB testing

 As per UL94 standard, a material shall be classified HB as described as below:

A. Not have a burning rate exceeding 40mm per minute over a 75mm span for specimens having a thickness of 3.0 to 13 mm, or
B. Not have a burning rate exceeding 75mm per minute over a 75mm span for specimens having a thickness less than 3.0mm, or
C. Cease to burn before the 100mm reference mark

Our company has UL94 Burning Tester, which meets with UL94 standard and apply to HB, V-0,V-1, V2 testing.
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UL94 Flammability Test Apparatus ZLT-UL94_1_1