46 C.F.R. § 147.65 Carbon dioxide and halon fire extinguishing systems.
Title 46 - Shipping
(a) Carbon dioxide or halon cylinders forming part of a fixed fire extinguishing system must be retested, at least, every 12 years. If a cylinder is discharged and more than five years have elapsed since the last test, it must be retested before recharging. (b) Carbon dioxide or halon cylinders must be rejected for further service when they— (1) Leak; (2) Are dented, bulging, severely corroded, or otherwise in a weakened condition; (3) Have lost more than five percent of their tare weight; or (4) Have been involved in a fire. (c) Cylinders which have contained carbon dioxide or halon and have not been tested within five years must not be used to contain another compressed gas on board a vessel, unless the cylinder is retested and re-marked in accordance with §147.60 (a)(3) and (a)(4). (d) Flexible connections between cylinders and distribution piping of semi-portable or fixed carbon dioxide fire extinguishing systems and discharge hoses in semi-portable carbon dioxide fire extinguishing systems must be renewed or tested at a pressure of 6.9 MPa (1000 psig). At test pressure, the pressure must not drop at a rate greater than 1.03 MPa (150 psi) per minute for a two minute period. The test must be performed when the cylinders are retested. (e) Flexible connections between cylinders and distribution piping of fixed halon fire extinguishing systems must be tested at a pressure of one and one-half times the cylinder service pressure as marked on the cylinder. At test pressure, the pressure must not drop at a rate greater than 1.03 MPa (150 psi) per minute for a two minute period. The test must be performed when the cylinders are retested.
Title 46: Shipping
PART 147—HAZARDOUS SHIPS' STORES
Subpart B—Stowage and Other Special Requirements for Particular Materials
§ 147.65 Carbon dioxide and halon fire extinguishing systems.
