[Code of Federal Regulations] [Title 49, Volume 3] [Revised as of October1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 49CFR193.2517] [Page 103] TITLE 49--TRANSPORTATION CHAPTER I--RESEARCH AND SPECIAL PROGRAMS ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 193--LIQUEFIED NATURAL GAS FACILITIES: FEDERAL SAFETY STANDARDS--Table of Contents Subpart F--Operations Sec. 193.2517 Purging. When necessary for safety, components that could accumulate significant amounts of combustible mixtures must be purged in accordance with a procedure which meets the provisions of the AGA ``Purging Principles and Practice'' after being taken out of service and before being returned to service.