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| General
Specifications for NRG COMPANY, INCORPORATED Chain and Flight Skimmer Equipment |
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| Part 2 - Products |
| 2.2 Skimmer Chain and Attachment Links |
| A. |
Collector chain shall be non-metallic, black in color, glass fiber reinforced polyester, type NM720-CS, as designed by NRG Company, Incorporated. |
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| B. | The chain shall have a pitch of 6.00" +/- 0.006" when measured under a load of 1000 lbs. and shall have a minimum working load of 3100 lbs. with no greater than 1% elongation. The chain shall weigh no more than 1.3 lbs./ft. The link side bar shall be curved and have reinforced surfaces for use with chain saver rim sprockets. Test data showing that chain elongation does not exceed 1% at its rated working load shall be supplied as well as test data showing that the chain has been tested to secure an average load of 6000 lbs. without failure. The chain connecting pins shall be 7/8" diameter, glass reinforced nylon resin, designed to withstand all shear loads imposed upon the chain without deformation. The pins shall press into the chain link and shall all have a T-head design to prevent pin rotation. The pins shall have snap-type locking feature and shall be held in place without the need of additional springs and/or pins. Metallic pins will not be acceptable. | ||
| C. | The attachment links shall be integrally molded (in one piece) to insure squareness and alignment of the flights. The rigid attachments shall be of the same material as the collector links mentioned previously and shall extend the full depth of the flight. The attachment links shall be shipped loose and shall be furnished with pre-drilled, ANSI standard mounting holes to match the flights. Mounting holes shall be drilled for use with 3/8" diameter 316 stainless steel flight hardware. | ||
| D. | One single link of chain for every 50 feet produced shall be proof load tested to 5500 pounds to ensure consistent quality during production. All of the pull tested strands shall be discarded. | ||