§108.173. Class I, Division 2 locations.
46 C.F.R. § 108.173
The following are Class I, Division 2 locations:
An enclosed space that has any open portion of the mud circulating system from the final degassing discharge to the mud suction connection at the mud pit.
A location in the weather that is—
Within the boundaries of the drilling derrick up to a height of 3 m (10 ft.) above the drill floor;
Below the drill floor and within a radius of 3 m (10 ft.) of a possible source of gas release; or
Within 1.5 m (5 ft.) of the boundaries of any ventilation outlet, access, or other opening to a Class I, Division 2 space.
A location that is—
Within 1.5 m (5 ft.) of a semi-enclosed Class I, Division 1 location indicated in § 108.171(b); or
Within 1.5 m (5 ft.) of a Class I, Division 1 space indicated in § 108.171(e).
A semi-enclosed area that is below and contiguous with the drill floor to the boundaries of the derrick or to the extent of any enclosure which is liable to trap gasses.
A semi-enclosed derrick to the extent of its enclosure above the drill floor or to a height of 3 m (10 ft.) above the drill floor, whichever is greater.
Except as provided in § 108.175 an enclosed space that has an opening into a Class I, Division 2 location.
Notes, amendments, and revision history
Authority
Authority: 43 U.S.C. 1333; 46 U.S.C. 3102, 3306; DHS Delegation No. 00170.1, Revision No. 01.4.
Source
Source: CGD 73-251, 43 FR 56808, Dec. 4, 1978, unless otherwise noted.