Design and Construction Standards - Tualatin Valley Water District

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Water Mains Section 3j. Tapping Sleeves1. Tapping sleeves shall be ductile iron, epoxy-coated steel, or stainless steel fittingsas specified in Table 5.2. Branch outlet from tapping sleeve shall be a minimum of Schedule 10 materialthickness and shall have a test plug.Table 2. Acceptable Tapping SleevesSize-on-SizeSizeSize by Reduced Size,12” or LessSize by Reduced Size,Greater than 12”Small taps,1” and SmallerSleeve TypesJCM 432Ford FTSSMueller H-304Smith Blair 665Romac SST III (w/ stainless steel flanges)Or equal stainless steel, MJ.JCM 452 stainless steel with outlet sealRomac SST IIIFord FTSSMueller H-304Smith Blair 665Or equalJCM 532 stainless steel outlet sealedEpoxy-coated steel with stainless steel boltsTap directly on the DI pipe.See Chapter 6.See Section 3.3.c and Detail 8 for tapping sleeve installation information.k. Casing Pipe, Spacers, and Seals1. Casing Pipei. Casing pipe shall be smooth steel conforming to ASTM A36 with minimumyield strength of 36,000 psi.ii.The minimum wall thickness shall be as required by the jurisdictiongoverning the highway, railroad, or stream bed under which the casing willbe installed. In no case shall the casing wall thickness be less than 1/4inch.2. Spacersi. Casing spacers shall be 12” wide, two piece construction, and all stainlesssteel.ii.iii.The spacer shall have a minimum of four runners through 14” pipe size, sixrunners through 36” sizes and seven runners through 48” sizes to securecarrier pipe within the casing and to resist movement of the pipeline.Casing spacers shall be as manufactured by Cascade Manufacturing,Calpico, Inc., or approved equal.TVWD Water System Standards June 2012 Page 3-6
Water Mains Section 33. Casing seals shall be Model “C” custom pull-on casing ends, as manufactured byCalpico, Inc., or approved equal.l. Polyethylene Wrap.1. Provide 8 mil low density polyethylene film, in tubular form, without tears, breaks orother defects conforming to the requirements of AWWA C105:i. Raw material requirements:ii.a. Group 2 (linear)b. Color: Black,c. Dielectric strength: Volume resistivity, 10 15 ohm-cm, minimum,d. Density: 0.910 to 0.935 g/cm 3Physical properties:a. Tensile strength: 3,600 psi, minimumb. Elongation: 700 percent, minimumc. Dielectric strength: 800 V/mil thickness, minimumd. Impact resistance: 600g, minimum,e. Thickness: low-density polyethylene film shall have a minimum thicknessof 0.008 inch,f. Propagation tear resistance: 2,550 gf (grams force), minimum.m. Polyethylene Tape and Primer: Provide 3-inch wide, plastic-backed, 12 mil blackadhesive tape Polyken No. 900-12 and Polyken 1027 Primer, or approved equal.3.3 Constructiona. Cutting the Pipe1. Cut pipe for inserting valves, fittings, or closure pieces in a neat and workmanlikemanner without damaging the pipe or lining and so as to leave a smooth end atright angles to the axis of the pipe. Do not flame cut.2. Cut ductile iron pipe with milling type cutter or saw.3. Dress cut ends of push-on joint pipe by beveling, as recommended by themanufacturer.b. Laying the Pipe1. Pipe location, depth of cover, and other relevant requirements from Section 2.1shall apply.2. The pipe bedding, pipe zone, and backfill materials shall comply with Section 2.1.Check the grade with a straight edge before laying each section of pipe and correct ifTVWD Water System Standards June 2012 Page 3-7
Page 1 and 2: Design andConstruction StandardsDel
Page 3 and 4: Table of ContentsList of TablesList
Page 5 and 6: Water System Design and Constructio
Page 19 and 20: Trench Excavation and Backfill Sect
Page 21 and 22: Trench Excavation and Backfill Sect
Page 23 and 24: Water Mains Section 3Section 3Water
Page 25 and 26: Water Mains Section 33.2 Materials3
Page 27: Water Mains Section 3ii.iii.f. Flan
Page 31 and 32: Water Mains Section 3ii.iii.c. Tapp
Page 33 and 34: Water Mains Section 3v. Measure the
Page 35 and 36: Water Mains Section 35. Operate all
Page 37 and 38: Valves and Valve Boxes Section 44.2
Page 39 and 40: Valves and Valve Boxes Section 44.
Page 41 and 42: Fire Hydrants Section 5Section 5Fir
Page 43 and 44: Water Service Connections Section 6
Page 49 and 50: Precast Concrete Vaults Section 74.
Page 51 and 52: Section 8Backflow Prevention Genera
Page 53 and 54: Backflow Prevention General Require
Page 59: Standard DetailsTVWD Water System S

Design and Construction Standards - Tualatin Valley Water District

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