Program Policy Manual - VOLUME V - Mine Safety and Health ...

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MSHA PROGRAM POLICY MANUAL VOLUME V section shall be so tested each year, and a record kept of the date, the pressure used, and the fire hose section tested. A different section of hose shall be tested each year. However, if the fire hose consists of more than five sections, then all of the sections shall be tested at least once during the 5-year period. In addition, if any water leakage occurs during a test, then all of the hose at the depot shall be tested, and all leaking hose and/or couplings replaced immediately. It shall not be necessary to dry the hose following a test. The outer surface of the hose shall be kept reasonably clean. In no instance shall a fire hose be tested with compressed air. 75.1104 Underground Storage, Lubricating Oil and Grease Portable, closed metal containers are considered to be of fireproof construction for temporary storage of lubricating oil and grease in face regions and other underground working places. Small vessels should be of the "safety can" type approved by the National Fire Protection Association. However, small metal containers, such as 5-gallon metal containers with plastic pouring spouts or lids are acceptable. No additional storage container is required for grease gun cartridges stored in face regions and other underground working places, provided they are kept in their shipping containers. Underground storage places for lubricating oil and grease shall be of fire-proof construction in that all sides, roof, and floor must be composed of incombustible material. Concrete, concrete block, cinder block, or plastered wire-mesh fastened on substantial framework (or equivalent) are acceptable. The framework should be metal; however, flame-retardant wood, bearing the Underwriter's Laboratories, Inc., seal may be used also. The floor should preferably be concrete to facilitate removal of spillage. Loose floor material such as sand, cinders,or limestone dust will absorb spilled oil and grease and become flammable. The storage of emulsion-type fire-resistant hydraulic oils needs special consideration. The water in some emulsion-type oils may evaporate from spilled pools leaving the residue which is highly flammable. Where spillage in storage areas is a factor, the emulsion-type hydraulic oils should be considered as flammable. Synthetic-ester and similar fire-resistant hydraulic oils remain fire retardant after spillage. 75.1106 Welding, Cutting, or Soldering with Arc or Flame October 2003 (Release V-34) 109
MSHA PROGRAM POLICY MANUAL VOLUME V Underground This standard requires, among other precautions, that work be done under the supervision of a qualified person and that testing for methane be conducted immediately before and continuously during cutting, welding, and soldering operations. The tests for methane must be made in locations where methane is likely to exist, and in no case is cutting, welding, or soldering permitted in an atmosphere that contains 1.0 percent or more methane. A person will be considered qualified for testing for methane and for oxygen deficiency if: 1) the person has been qualified for this purpose in the State in which the mine is located, or 2) the person has been qualified for this purpose by the Secretary. Notwithstanding the provisions of 1) and 2), no person shall be a qualified person for testing for methane unless the person demonstrates to the satisfaction of an authorized representative of the Secretary that he or she is qualified to test for methane with a portable methane detector approved by MSHA. "Continuously" as used in this section is interpreted to mean that a qualified person is to remain at the worksite, and tests for methane must be made at regular and frequent intervals. In mines where welding, cutting, or soldering with a flame is performed, the inspector should observe at least one such operation to determine if the frequency of such tests is sufficient to ensure a systematic and effective means of monitoring the methane content in the air in the vicinity of the worksite. Methane tests are critical for safe cutting, welding or soldering in an underground coal mine and are somewhat different from methane tests used for general mine ventilation. While § 75.323(a) specifies that tests for methane concentrations must be made at least 12 inches from the roof, face, ribs and floor, this distance requirement is not applicable to welding, cutting or soldering activities performed under § 75.1106. MSHA’s policy on § 75.1106 clearly states that methane tests conducted under this section must be made in locations where methane is likely to exist, and in no case is cutting, welding or soldering permitted in an atmosphere that contains 1.0 percent or more of methane. Since the face, roof, ribs, floors and any fully or partially enclosed areas of an underground coal mine are locations where methane is likely to exist, methane tests must also be made at or near the surface of these areas (not 12 inches away) and within any fully or partially enclosed areas that may be exposed to the aforementioned ignition sources. Welding, cutting or soldering activities are prohibited if any methane levels are 1.0 percent or greater within the affected areas. MSHA recommends the use of probes for methane detectors to take some of these measurements. July 2010 (Release V-42) 111
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