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, J) . 23 TANK FITTINGS AND CONNECTIONS 231 Tank fittings are not typically left installed in the tank since road vibrations,temperature changes, and shipping damage may cause fitting damage and leaks Customer lob site fitting installation insures proper gasket compression and minimizes fitting damage potential Some distributors sell or install their own tank fittings or accessories These fittings or accessories are not warranted by SII. 232 All tank connections must have adequate provisions for tank expansion/contraction due to temperature and load changes These provisions should allow 4%dimensional movement Rigid piping must not be directly connected to tank outlets S11 strongly recommends using expansion joints for all tank connections The use of rigid Riping or the(allure to provide for the expansion of the,tank will void all warranties 233 FITTING INSTALLATION GENERAL GUIDELINES- If fittings are to be customer drilled and installed,there are some general installation guidelines which may be helpful 2331 LOCATION - It is very Important that fitting location be carefully considered prior to cutting any holes Sit recommends(fitting size dependent)a 5" minimum centerline height for fittings on tanks less than 3000 gallons with the fitting gasket at least 1-112" above or below the end of any tank knuckle radius. SII recommends(fitting size dependent)a S" minimum centerline height for fittings on tanks 3004 gallons or larger with the fitting gasket at least 3"above or below the end of any tank knuckle radius. SII recommends locating all fittings so gasket seal areas do not go through any tank flange lines or any molded-in tank feature Q a gallonage markers, logos,ribs,edges of tank flats,etc). SII does not recommend field cutting and Installation of fittings on insulated tanks Fdbngs must be located to avoid interference • with tie-down devices and to allow for tightening of fittings nut(s) Mark all of the proposed fitting locations with a marker Re-inspect all of the locations prior to cutting any holes. 2332 TOOLS-It is very important to obtain the correct tools before attempting to install any tank fitting Tools you will need for installing tank fittings properly include *Marker for laying out holes "Tape measure,straight edge,plum-bob(to align fittings meant to be aligned), etc *1/2"drill motor *Hole saw sized to the O D of the fitting body If bulkhead style (see section 3 1, and 3 2) *Hole saw sized to the I D of the fitting flange hole or the same size as the fitting's size if flange style(see section 3 3,and 3 5) *Drills for any bolt holes (size+1116" larger than the size of the bolts) *Deburring tool (a drum sander and 150-220 grit sandpaper may also be used) *Wrenches (adjustable, sockets,strap wrench, etc ) 2333 PROCEDURE 1. Disassemble the fitting and use It as a final location check as noted in 2 3 3 1 2 With the center hole marked,cut the tank hole using the correct size hole saw(see 2 3 3 2) 3 If the fitting is a flange style (see section 3 3 and 3 5)then mark one of the bolt holes using the outer flange The bolt holes should be oriented so the bolt holes straddle the pnncipal centerline of the tank With the hole correctly located and marked, dull the bolt hole 4 Temporarily install one bolt and position the flange over the main fitting hole 5 Mark the bolt hole opposite the bolt hole already drilled and drill that bolt hole 6 Temporarily install another bolt and drill the remaining bolt holes using the flange as a guide 7 With all of the fitting's holes drilled, gently deburr the hole(s)wah the deburring tool Do not put any nicks or scratches into the tank Sand any nicks or scratches out with sandpaper greater than 120 grit S Clean away any debris from the sealing surface of the tank 6