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CITY OF sANTA ANA, CALIFORNIA STANDARD SPECIFICATION NUMBER 52. , Vitrified Clay Pipe. Sewer. (a) QUALITY. All vitrified clay pipes shall be of first quality, vitrified, salt-glared sewer pipe, sound and well burned throughout their entire thickness, imprevious to tools. tu~, and must give a metallic ring when struck with a hammer. (b) (3LAZIN(3. The pipe must be smooth and its interior surface must be thoroughly (c) SIZE AND SHAPE. All pipes shall be socket pipes, with sockets true, circular und concentric with the bore of the pipe. All sockets must be of sufficient diameter to receive to the full depth the spigot end of the next followi~ pipe or special, without any chipping whatsoever oi either, and also to leave an annular space, as specified i~ the ~ol- lowi~ table: The deep and wide socket pipe shall have circular corrugations on the inside o/ the socket for its entire depth, and also on the outside of the spigot end for a corresponding depth. (d) IDENTIFICATION MARKS. At least seventy-five (75) per cent of usch de- livery of pipe sh~ll have clearly indented or stenciled on the outer surface the name of its manufacturer. In place of the name of the manufacturer a trade-mark may be substituted oI a size and type which shall be approved by the City Engineer, and a copy thereof filed with the City Clerk. (e) LENGTHS. The length of all sizes of straight pipe, exclusive of socket, except four (4) and six (6) inch pipe, shall be two and one-half (2~) feet. Four (4) and six (6) inch pipe ~h~ll be two (2) feet. or two and one-half (2~) feet, (0 DIMENSIONS. The thickness o! the shell, the depth of the socket, and thc ~nular sp~ce shall have the dimensions given in the {ollowlng table: TABLE OF DIMENSIONS FOR VITRIFIED CLAY PlPB Depth of ~)eJmt Minimum A~nultr CoL 3 CoL 4 CoL S Cd. 6 Ca~ I ~i" 2" 2½" ~/" ~t" ~,, ~.~,, 2-~" ~" ~" ~,, ~.~,, z-~" ~" ~" ~.~- 2-~" r ~" ~" ]_~,, ~.~,, ~-~,, ~,, ~,, ].~,, z.~" s~" ~" ~" 2.4- i" z' 3" 4" ½" ii" The annular space referred to in columns 5 and 7 of the above table is the space between the circumt~ace of the upper inside diameter o! the socket and the spigot of the pipe ~ in s~id ~ ~ mmuhr spice given in s~id cob,runs 6 m~d ? bei~g the m!.imum mmulv SliCe ~liow~bl~. excepting for the variaiion given in (h) hereof.