Section 12765 - Venting of Vertical Retorts for Removal of Air(a) The following specifications apply for venting vertical retorts not larger than approximately 42 inches diameter by 96 inches high, when the following equipment is used: (1) Strap-iron or adequately perforated metal baskets.(2) Vents located in or near the top of the retort.(3) At least a one-inch steam line into the bottom of the retort and arranged so that steam is directed up into the load of cans.(4) Raised supports for retort baskets so constructed that no baffling effect occurs. Baffle plates are not permitted. If dividers are used, they shall be of wide mesh material, such as fish nets or onion sacks, or of strap iron or sheet metal having perforations at least the equivalent of one-inch holes on one and three-fourths-inch centers. Close meshed cloth dividers are not permitted.
(b) System I. Venting Through a Single 1 1/2 -Inch Overflow Pipe. (1) Venting of a vertical retort may be accomplished through a 1 1/2 -inch overflow pipe if it is connected to the retort within at least 10 inches of the top of the shell. The overflow pipe shall have not more than eight feet of 1 1/2 -inch pipe beyond the valve. If the vent pipe discharges into a manifold, the manifold shall be sufficiently large so that venting will not be impaired.(2) Operation. The vent valve shall be wide open when steam is turned on, and it shall remain wide open for at least four minutes after steam is turned on and also until the mercury thermometer reaches a temperature of at least 218 degrees F or for at least five minutes to at least 215 degrees F.(c) System J. Venting Through a Single One-inch Top Vent. (1) Venting of a vertical retort may be accomplished through a single unrestricted one-inch vent located in the lid of the retort. This vent shall be equipped with a one-inch gate valve and shall discharge into the atmosphere, with not more than four feet of one-inch pipe beyond the valve.(2) The vent valve shall be wide open when steam is turned on, and it shall remain wide open for at least five minutes after steam is turned on and also until the mercury thermometer reaches a temperature of at least 230 degrees F or for at least seven minutes to at least 220 degrees F.Cal. Code Regs. Tit. 17, § 12765
1. New NOTE filed 8-1-84 (Register 84, No. 31). Note: Authority cited: Sections 208 and 28440, Health and Safety Code. Reference: Section 28411, Health and Safety Code.
1. New NOTE filed 8-1-84 (Register 84, No. 31).