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Specifications , 1-3 <br />S1.02 N-12 WT IB Pipe (per ASTM F2648) Specification <br />Scope <br />This specification describes 4- through 60-inch (100 to 1500 mm) N-12 WT IB pipe (per ASTM F2648) for use in <br />gravity -flow land drainage applications. <br />Pipe Requirements <br />N-12 WT IB pipe (per ASTM F2648) shall have a smooth interior and annular exterior corrugations. <br />• 4- through 60-inch (100 to 1500 mm) pipe shall meet ASTM F2648. <br />• Manning's "n"value for use in design shall be 0.012. <br />joint Performance <br />Pipe shall bejoined using a bell & spigotjoint meeting ASTM F2648. The joint shall be watertight according to <br />the requirements of ASTM D3212. Gaskets shall meet the requirements of ASTM F477. Gaskets shall be installed <br />by the pipe manufacturer and covered with a removable, protective wrap to ensure the gasket is free from <br />debris. Ajoint lubricant available from the manufacturer shall be used on the gasket and bell during assembly. <br />12- through 60-inch (300 to 1500 mm) diameters shall have an exterior bell wrap installed by the manufacturer. <br />Fittings <br />Fittings shall conform to ASTM F2306. Bell and spigot connections shall utilize a welded bell and <br />valley or saddle gasket meeting the watertight joint performance requirements of ASTM F2306. <br />Field Pipe and joint Performance <br />To assure watertightness, field performance verification may be accomplished by testing <br />in accordance with ASTM F2487. Appropriate safety precautions must be used when field- <br />testing any pipe material. Contact the manufacturer for recommended leakage ratesi <br />Material Properties <br />Material for pipe production shall be an engineered compound of virgin and recycled high -density <br />polyethylene conforming with the minimum requirements of cell classification 424420C (ESCR Test Condition <br />B) for 4- through 10-inch (100 to 250 mm) diameters, and 435420C (ESCR Test Condition B) for 12- through <br />60-inch (300 to 1500 mm) diameters, as defined and described in the latest version of ASTM D3350, except <br />that carbon black content should not exceed 4%. The design engineer shall verify compatibility with overall <br />system including structural, hydraulic, material, and installation requirements for a given application. <br />Installation <br />Installation shall be in accordance with ASTM D2321 and ADS recommended installation guidelines, <br />with the exception that minimum cover in trafficked areas for 4- through 48-inch (100 to 1200 mm) <br />diameters shall be one foot (0.3 m) and for 60-inch (1500 mm) diameter the minimum cover shall be <br />2 ft. (0.6 m) in single run applications. Backfill for minimum cover situations shall consist of Class 1 <br />(compacted) or Class 2 (minimum 90% SPD) material. Maximum fill heights depend on embedment <br />material and compaction level; please refer to Technical Note 2.02. Contact your local ADS representative <br />or visit our website at www.adspipe.com for a copy of the latest installation guidelines. <br />Pipe Dimensions <br />4 6 8 10 12 15 18 24 30 36 42 48 60 <br />(100) (150) (200) (250) (300) (375) (450) (600) (750) (900) (1050) (1200) (1500) <br />4.8 6.9 9.1 11.4 14.5 18 22 28 36 42 48 54 67 <br />(122) (175) (231) (290) (368) (457) (559) (711) (914) (1067) (1219) (1372) (1702) <br />* Pipe O.D. values are provided for reference purposes only, values stated for 12 through 60-inch are t1 inch. Contact a sales <br />representative for exact value5 <br />August 2025 <br />