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34 Pa. Code § 23.81. Classification.

GENERAL BUILDING CLASSIFICATIONS


§ 23.81. Classification.

 Buildings enumerated in sections 4—8 of the Dry Cleaning and Dyeing Law (35 P. S. § §  1269.4—1269.8) shall be classified as follows:

   (1)  Class I. The buildings in this class use class I solvent which is a flammable petroleum solvent having the following properties:

Flash point (closed cup tester)Lower than 100 °F.

   (2)  Class II. The buildings in this class use class II solvent which is a flammable petroleum solvent having the following properties:

Flash point (closed cup tester)Lower than 138.2° F. but higher than 99° F.
Initial boiling pointLower than 357.8° F. but higher than 300° F.
Ignition temperatureLower than 453.2° F. but higher than 400° F.
Power limit of explosive rangeNot less than 1.1% by volume of air.
Spontaneous heatingThe solvent shall not heat spontaneously.

   (3)  Class III. The buildings in this class use class III solvent which is a flammable petroleum solvent having the following properties:

Flash point (closed cup tester)Not lower than 138.2° F.
Initial boiling pointNot lower than 357.8° F.
Ignition temperatureNot lower than 453.2° F.
Power limit of explosive rangeNot less than 0.8% by volume in air at an initial temperature of 302° F.
Spontaneous heatingThe solvent shall not heat spontaneously.

   (4)  Class IV. The buildings in this class use Class IV solvent which is a commercially nonaqueous liquid solvent that is volatile but does not contain flash point ingredients and which is neither a Class I, Class II nor a Class III solvent.


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