1997-07-14_REVISION - M1988112 - Laserfiche WebLink

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BATTLE MOUNTAIN RESOURCES Page 9~ San Luis Project Technical Specifications The pipe shall be a high density polyethylene (HDPE) corrugated pipe with an integrally formed smooth waterway. The pipe shall conform to AASHTO classifications for "Type S" (smooth waterway) pipes. The pipe shall have a full circular cross-section, with an outer corrugated pipe wall and an essentially smooth inner wall. Corrugations may be annular or spiral. Alternative pipe sizes, material types, or classifications must be approved by the Designer. Pipe dimensions and Specifications are shown in the Drawings. The HDPE pipe shall be installed in strict accordance with the manufacturer's instructions and recommendations. Sections of pipe shall be positioned so as to minimize any offset on the inside of the pipe joints. The pipe shall be set to the lines and grades shown on the Lrawings, or as established by the Designer. Pipe sections shall be joined in such a manner that the ends are fully entered and the inner surfaces are reasonably flush and even. Deflections or "kinks" are not acceptable. Pipes and pipe fittings shall be made of virgin polyethylene compounds which conform with the requirements of cell class 324420C as defined and described in ASTM D3350. A minimum pipe pazallel plate stiffness, as tested in accordance with ASTM D2412, of 40 psi is required. The fittings shall not reduce or impair [he overall integrity or function of the pipeline. Fittings may be either molded or fabricated. Common corrugated fittings include in-line joint fittings, such as couplers and reducers, and branch or complimentary assembly fittings such as tees, and end caps. These fittings may be installed by various methods, such as snap-on, screw-on, bell and spigot, and wrap azound. Couplings shall provide sufficient longitudinal strength [o preserve pipe alignment and prevent sepazation at the joints. Only fittings supplied or recommended by the pipe manufacturer shall be used. Neoprene or rubber gasket shall be used where designated on the Drawings. Installation of the pipe shall be in accordance with ASTM Recommended Practice D2321. Pipe laying shall begin at the downstream end of the culvert. The lower segment of t}re pipe shall be in contact with the prepared bedding throughout its full length. Recesses in the bedding shall be made to accommodate the shape of the bell and spigot pipe, if necessary, which should be placed with the bells facing upstream. After the conduit or section of conduit is installed, it shall be inspected before any backfill is placed. Any conduit found to be damaged shall be replaced, and conduit found to be out of alignment or shall be taken up and re-laid, at the Contractor's expense. N:\DHALLMANtiSANLUIS~SANLUIS.DOC 9~ SRK Project No. 1473?