COMPLIANCE INFO_1997 - Laserfiche WebLink

Home Browse Search

• OMNIFLEX IIT"" COAXIAL PIPING SYSTEM BURIAL SPECIFICATIONS Minimum Minimum Sand or Pipe Size Surface Condition Burial Depth Pea Gravel Above Pipe, 1-1/2" Unpaved 17" 12" (Omniflex II-) Paved,Minimum 4"Asphalt 12" 8" Paved,;Minimum 4" Concrete 9" 6" Minimum burial depths shown in the above table are Multiple lines in the same ditch should be separated by a acceptable if,and only if,the following conditions are met: minimum of 4" if special precautions are taken to insure 1. The ditch width is 2-1/2' or less. that backfill material is placed under and around the pipe. 2. The paved surfaces extend at least 2' on either side of In all cases there must never be a void of backfilll under the ditch. or around the pipe. 3. The fill material is clean sand or 1/8"to 3/4"pea gravel. The maximum allowable burial is 23' for burial in 4. Six inches of fill material is placed under the pipe as moderately compacted soils which do not contain clay bedding material. and where the soil modulus is at least 1000 psi. Remaining backfill above the sand or pea gravel amounts If you have any further questions, please contact your shown in the last column can be native soil if desired. local TCI Representative. AS REQUIRED FOR LISTING WITH UNDERWRITERS' LABORATORIES OF CANADA,OMNIFLEX II'"'COAXIAL PIPING SYSTEMS MUST BE INSTALLED WHEN AMBIENT TEMPERATURE IS ABOVE OOF. 27' 27• 2 1 ---moi a � Pe 25 18 lI MUST ALLOW MINIMUM 1/8"SLOPE PER FOOT PREPARING THE SITE Step One—Layout Step Two To excavate for pipe trench,determine design layout from Compute slope from furthest dispenser to tank(s). Allow one dispenser island to next. Keep 3' minimum bend minimum 1/8"slope per foot for Omniflex pipe.This slope radius on Omniflex pipe. determines depth of pipe trench and tank(s). A) For product labeling uni- Step Three formity, enter dispenser sump Bed pipe chase with minimum of 6"of approved bedding/ from same direction. backfill material (pea gravel, sand, or other prior TCI approved material). Bed of pipe chase must be raked to B) If order of product labeling even plane,incorporating minimum 1/8"per foot of slope can reverse with each succes- from furthest dispenser towards tank field. sive dispenser,less piping may be used. Step Four— Tank Sumps Before installation of piping, mount tank sumps to un- derground storage tanks (see Tank Sump Installation • Note: For Omniflex II"system,use uncuffed sumps ONLY. Instructions for additional information). Page 1 - Omniflex Instructions