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joints shall be installed in accordance with AWWA C206. Welding operators, procedures, <br /> and details shall be qualified in accordance with AWWA C206. <br /> Flanges where shown shall be slip-on or weld neck per AWWA C207, Class D, 125 Ib. <br /> Nuts and bolts shall be of the sizes and quantities recommended in AWWA C207. <br /> Gaskets for flanged joints shall be cloth-inserted sheet rubber gaskets in one piece <br /> conforming to AVVWA C207 and ANSI B16.21, 1/8-inch thick. The gasket shall be <br /> full-cut, with holes to pass bolts. Segmented straight-joint or interlocking gaskets will not <br /> be accepted. Blind flanges shall be gasketed with the entire face with the gasket <br /> cemented to the blind flange. Gasket material shall be free from corrosive alkali or acid <br /> ingredients and suitable for use in potable water lines. <br /> Flexible couplings (pipe sleeves) and flanged coupling adapters shall be furnished and <br /> installed by the Contractor. All couplings shall be suitable for a minimum working <br /> pressure of 150 psi. Flexible couplings for steel pipe shall be Smith-Blair Series 411, <br /> Romac Style 400, or equal. Flanged coupling adapters shall be Smith-Blair Series 913, <br /> Romac Style RC400, or equal. Sleeves shall be ten inches minimum length and have a <br /> fusion bonded epoxy coating suitable for potable water. <br /> All flexible couplings and pipe joints without cement mortar coating shall be field coated <br /> with cement mortar after installation. Wrap the coupling and exposed pipe with a strip of <br /> woven fabric (diaper) and band around the pipe at each side of the joint. The fabric shall <br /> be of such a weave as to allow the escape of air and excess water but prevent escape of <br /> mortar. Pour the joint full of grout (1 part cement to 1 part fine aggregate with sufficient <br /> water to form a consistency of thick cream) through a space in the woven fabric slightly <br /> to one side of the top. Rod the grout with a beaded wire or chain as it is poured into the <br /> joint. Immediately after completing the exterior joint, place damp earth over and around <br /> the joint to prevent rapid drying. <br /> Bolts and nuts for exposed flanges and fittings shall be carbon steel hex bolts, as <br /> specified in AWWA C115 and C606. Bolts and nuts for buried flanges and fittings shall <br /> be stainless steel. <br /> D. Linings and Coatings <br /> Internal surfaces of the steel pipe and fabrications shall be cleaned and lined with <br /> cement-mortar in conformity with ANSI/AWWA C205. Exposed pipe shall be fusion <br /> bonded epoxy lined and coated in accordance with AWWA C213 and finished painted as <br /> specified in Section 09900. Buried pipe coatings shall be reinforced cement mortar in <br /> accordance with AWWA C205. Fusion Bonded Epoxy shall be 100 percent solid, one or <br /> two coats minimum 7 MDFT. <br /> Prime coat all other exposed metal surfaces, not mortar coated or fusion bonded epoxy <br /> coated, in the shop prior to delivery to the site with a minimum 3 mils of polyimide, <br /> anticorrosive epoxy metal primer measured as a dry film thickness. Surface preparation <br /> and application sha] be as recommended by coating material manufacturer. Approved <br /> submittal data identifying the shop primer used shall be provided to the onsite finish coat <br /> applicator and to the Engineer before delivery of items to the job site. Repair damaged, <br /> deteriorated and poorly applied shop coatings that do not meet the requirements of <br /> Section 09900 Coating Systems. <br /> July 2007 Division III-152 NEI Phase II Water and Sewer <br /> CIP Nos. 7468, 7589, 7590 <br />