{"data":{"id":"us/30-cfr-7.96","jurisdiction":"us","citation":"30 CFR 7.96","heading":"Definitions.","body":"In addition to the definitions in subparts A and E of this part, the following definitions apply in this subpart.\nCylindrical joint. A joint comprised of two contiguous, concentric, cylindrical surfaces.\nDiesel power package. A diesel engine with an intake system, exhaust system, and a safety shutdown system installed.\nDry exhaust conditioner. An exhaust conditioner that cools the exhaust gas without direct contact with water.\nExhaust conditioner. An enclosure, containing a cooling system, through which the exhaust gases pass.\nExhaust system. A system connected to the outlet of the diesel engine which includes, but is not limited to, the exhaust manifold, the exhaust pipe, the exhaust conditioner, the exhaust flame arrester, and any adapters between the exhaust manifold and exhaust flame arrester.\nFastening. A bolt, screw, or stud used to secure adjoining parts to prevent the escape of flame from the diesel power package.\nFlame arrester. A device so constructed that flame or sparks from the diesel engine cannot propagate an explosion of a flammable mixture through it.\nFlame arresting path (explosion-proof joint). Two or more adjoining or adjacent surfaces between which the escape of flame is prevented.\nFlammable mixture. A mixture of methane or natural gas with normal air, that will propagate flame or explode when ignited.\nGrade. The slope of an incline expressed as a percent.\nHigh idle speed. The maximum no load speed specified by the engine manufacturer.\nIntake system. A system connected to the inlet of the diesel engine which includes, but is not limited to, the intake manifold, the intake flame arrester, the emergency intake air shutoff device, the air cleaner, and all piping and adapters between the intake manifold and air cleaner.\nPlane joint. A joint comprised of two adjoining surfaces in parallel planes.\nSafety shutdown system. A system which, in response to signals from various safety sensors, recognizes the existence of a potential hazardous condition and automatically shuts off the fuel supply to the engine.\nStep (rabbet) joint. A joint comprised of two adjoining surfaces with a change or changes in direction between its inner and outer edges. A step joint may be composed of a cylindrical portion and a plane portion or of two or more plane portions.\nThreaded joint. A joint consisting of a male- and female-threaded member, both of which are the same type and gauge.\nWet exhaust conditioner. An exhaust conditioner that cools the exhaust gas through direct contact with water, commonly called a water scrubber.","path":["Title 30—Mineral Resources","CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR","SUBCHAPTER B—TESTING, EVALUATION, AND APPROVAL OF MINING PRODUCTS","PART 7—TESTING BY APPLICANT OR THIRD PARTY","Subpart F—Diesel Power Packages Intended for Use in Areas of Underground Coal Mines Where Permissible Electric Equipment is Required"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-30.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:25:24Z","sha256":"ec38dac18dfab12927adc506a74bcae684d7f88232eb79a4d567ef5fcb8d63de","source_id":"us-cfr","stale":true,"prev":"us/30-cfr-7.95","next":"us/30-cfr-7.97"},"notice":"GroundRules: Original legal text. Not legal advice."}