[Code of Federal Regulations]
[Title 30, Volume 1]
[Revised as of July 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 30CFR18.27]

[Page 95]
 
                       TITLE 30--MINERAL RESOURCES
 
  CHAPTER I--MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
 
PART 18--ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES--Table of Contents
 
             Subpart B--Construction and Design Requirements
 
Sec. 18.27  Gaskets.

    A gasket(s) shall not be used between any two surfaces forming a 
flame-arresting path except as follows:
    (a) A gasket of lead, elastomer, or equivalent will be acceptable 
provided the gasket does not interfere with an acceptable metal-to-metal 
joint.
    (b) A lead gasket(s) or equivalent will be acceptable between glass 
and a hard metal to form all or a part of a flame-arresting path.