GroundRules
30 CFR 18.98: Enclosures, joints, and fastenings; pressure testing.
Where this section sits in the code
- Title 30—Mineral Resources
- CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR
- SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS
- PART 18—ELECTRIC MOTOR-DRIVEN MINE EQUIPMENT AND ACCESSORIES
- Subpart E—Field Approval of Electrically Operated Mining Equipment
(a) Cast or welded enclosures shall be designed to withstand a minimum internal pressure of 150 pounds per square inch (gage). Castings shall be free from blowholes.
(b) Pneumatic field testing of explosion-proof enclosures shall be conducted by determining:
(1) Leak performance with a peak dynamic or static pressure of 150 pounds per square inch (gage); or
(2) A pressure rise and rate of decay consistent with unyielding components during a pressure-time history as derived from a series of oscillograms.
(c) Welded joints forming an enclosure shall have continuous gastight welds.
Collected 2026-08-27T02:25:24Z. Source file · JSON