ASTM D1248: Polyethylene Plastics Molding and Extrusion Materials.ASTM D2239: Polyethylene Plastic Pipe Based on Controlled Inside Diameter.ASTM D2447: Polyethylene Plastic Pipe, Schedules 40.ASTM D3035: Polyethylene Plastic Pipe Based on Controlled Outside Diameter.Since specifications vary from customer to customer, we perform in-house lab tests on resins and finished products which include, but are not limited to the following: When this is necessary, ovality should be corrected in the field by processing the conduit through re-rounding and straightening equipment during installation. While these conditions are normal and expected and are not a concern in most applications, some installations or applications may require “re-rounding” of the conduit. Ovality (out-of-roundness) and curvature are inherent characteristics of coiled, continuous length HDPE conduit. NOTE: HDPE conduit is manufactured to the dimension and requirements of ASTM F2160. The duct shall also be capable of being encased in concrete. The duct shall be capable of being direct buried by plowing or trenching with no special consideration to using selective backfill. The duct shall be resistant to most harsh chemicals and/or protected against degradation due to oxidation or general corrosion. Special reel sizes and/ or dimensions should be available for special installations. This will keep coupling requirements to a minimum. Packaging The duct should be provided on lightweight metal reels in maximum lengths possible with no joints or splices. Check with a manufacturer for specifications.Ĭouplings should be available to quickly connect the duct and should be air and watertight (i.e., Duct-Lok type couplings in either plastic or aluminum, depending on type of installation). The rope can be provided with varying strengths as needed for a particular installation. The duct should be equipped with a factory installed rope or tape and pre-lubed to aid in the installation of cable. The open ends of each length of reeled duct shall be sealed by plastic caps to prevent the entrance of dirt and/o r moisture. Other special markings can be agreed upon between the buyer and seller. Duct for electrical cable should have “CAUTION - HIGH-VOLTAGE” printed at regular intervals. The duct shall have a durable identification showing the name or trademark of the manufacturer, duct size (i.e., 2” IPS SCH-80), date and reference code. All other colors shall have a UV light stabilizer which will protect the duct for a minimum of 12 months in direct sunlight. The duct for exposed areas (black) shall have a minimum of carbon black. It shall be as uniform as practicable in respect to overall dimensions, color, density, thickness, etc.
HIGH DENSITY POLYETHYLENE FREE
Workmanship The duct shall be free of visible cracks, holes or other physical defects that would degrade its performance. It shall be possible to bend the duct to a minimum (supported) radius of 10 diameters. The duct specified for aerial installation shall be ultraviolet light-resistant. The duct shall perform in underground and above-ground temperature range of minus 300° temperature range of minus 300☏ to 1300☏ without degradation of material properties. The duct shall be capable of being coiled (reeled) in continuous lengths, transported, stored outdoors and subsequently uncoiled for installation - without affecting its properties or performance. The ducts are supplied with either smooth, ribbed, or corrugated walls and come in a multitude of colors. The addition of clean rework material is permissible if generated in the manufacturer’s own plant. The duct shall be manufactured from virgin high density polyethylene. As a smooth and flexible duct for cable, HDPE is unequaled for ease of installation and continuous strength. From extreme temperatures to abrasive and high tension applications in underground installations, HDPE provides quality service and economy in a wide range of uses. High Density Polyethylene Duct has been tested and proven under the most severe conditions.
0 kommentar(er)
