[Code of Federal Regulations] [Title 46, Volume 4] [Revised as of October 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR108.175] [Page 127] TITLE 46_SHIPPING (This book contains parts 90 to 139) CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 108_DESIGN AND EQUIPMENT--Table of Contents Subpart B_Construction and Arrangement Sec. 108.175 Contiguous locations. An enclosed space that has direct access to a Division 1 or Division 2 location is the same division as that location, except-- (a) An enclosed space that has direct access to a Division 1 location is not a hazardous location if-- (1) The access has self-closing gas-tight doors that form an air lock; (2) The ventilation causes greater pressure in the space than in the Division 1 location; and (3) Loss of ventilation overpressure activates an alarm at a manned station; (b) An enclosed space that has direct access to a Division 1 location can be considered as a Division 2 location if-- (1) The access has a self-closing, gas-tight door that opens into the space and that has no hold-back device; (2) Ventilation causes the air to flow with the door open from the space into the Division 1 location; and (3) Loss of ventilation activates an alarm at a manned control station; and (c) An enclosed space that has direct access to a Division 2 location is not a hazardous location if-- (1) The access has a self-closing, gas-tight door that opens into the space and that has no hold-back device; (2) Ventilation causes the air to flow with the door open from the space into the Division 2 location; and (3) Loss of ventilation activates an alarm at a manned control station.