735
7-113SECTIO N 735 – INSULATIN G MATERIALS
735.0 1 POLYSTYREN E INSULATIO N BOARD . Polystyrene insulation board shall conform to the requirements of AASHTO M 230 . It shall be furnished in nominal 2 -foot × 8-foot boards and shall be of the thickness, compressive strength, and density shown on the Plans. 735.0 2 BLANKE T INSULATIO N MATERIAL . Blanket insulation material shall consist of mats of fiberglass, rock wool, balsam wool, or other approved insulating m aterials completely enclosed on all sides within weatherproof facings of reinforced, coated Kraft paper or polyethylene sheeting. The thermal conductivity of the blanket insulation material shall not exceed 0.27 BTU -inch per hour per square foot per degree Fahrenheit at a mean temperature of 75°F.
740
7-114SECTIO N 740 – WATE R LINES AND APPURTENANCES
740.0 1 PLASTI C PIPE, FLEXIBLE . Flexible plastic pipe shall be polyethylene plastic pipe suitable for the transportation of potable water and shall conform to the requirements of ANSI/ AWWA C901 . The material grade selected shall be capable of withstanding a minimum sustained water pres sure of 160 psi at 73°F. The pipe shall be inside -diameter controlled. Fittings may be either nylon, copper, or bronze. Clamps shall be stainless steel. 740.0 2 PLASTI C PIPE, RIGID (PVC) . Rigid PVC plastic pipe shall be suitable for the transportation of potable water and shall conform to the requirements of ANSI/AWWA C900 . The material grade selected shall be capable of withstanding a minimum sustained water pressure of 160 psi at 73°F. Fittings shall be PVC plastic conforming to the requirements of ANSI/ AWWA C907 . 740.0 3 COPPE R TUBE , SEAMLESS . Seamless copper water tube shall conform to the requirements of ASTM B88, Type K. 740.0 4 STEEL PIPE, GALVANIZED . Galvanized steel pipe shall be suitable for the transportation of potable water and shall be the standard weight class conforming to the requirements of ASTM A53 . 740.0 5 DUCTIL E IRON PIPE, CEMEN T LINED . Ductile iron pipe shall be cement lined and centrifugally cast in metal - or sand -lined molds. The pipe shall conform to the requirements of ANSI/AWWA C151/A 21.51 and the cement mortar lining shall conform to the requirements of ANSI/ AWWA C104/A21.4 . The class of pipe shall be as specified in the Contract. 740.0 6 PIPE INSULATION . Thermal insulation for pipes shall be preformed to fit standard pipe sizes and may be supplied as either hollow cylindrical shapes (split in half lengthwise) or as curved segments. Insulation shall include all accessories complete with proper jackets or facings as required by the conditions. Multilayer insulation is acceptable provided the inside and outside diameters of each layer will ensure proper nesting. The thermal conductivity of the insulation material shall not exceed 0.27 BTU -inch per hour per square foot per degree Fahrenheit at a mean temper ature of 75°F as determined in accordance with ASTM C177 or ASTM C518 . The thickness and jackets shall be as specified in the Contract. Pipe insulation used as bond breakers for structures shall meet the requirements of ASTM C534 .