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Opening of Bids - 2024 Sewer and Manhole Rehabilitation Proj No. 122-019 - Visu-Sewer
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Opening of Bids - 2024 Sewer and Manhole Rehabilitation Proj No. 122-019 - Visu-Sewer
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7/9/2024 2:49:57 PM
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Board of Public Works
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Projects
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7/9/2024
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NATIONAL LINER RECOMMENDED <br />RESIN, CATALYZATION & MIXING PROCEDURE <br /> <br />SAFETY <br />• Each of the cure chemicals should be weighed in separate containers and containers <br />should not be interchanged unless thoroughly cleaned. Cobalt Naphthenate should <br />never be mixed directly with any peroxide since this could result in a strong exothermic <br />reaction and/or fire. <br /> <br />• Keep peroxides out of direct sunlight. Ultraviolet light emitted from the sun may reduce <br />the activity of the peroxide, which will reduce the effectiveness of its ability to cure the <br />resin. The combination of heat and ultraviolet light from the sun may lead to rapid <br />peroxide decomposition resulting in heat and/or fire. <br /> <br />• Always follow manufacturers' instructions for peroxide storage conditions and maximum <br />upper temperature limits of storage. Follow resin manufacturers' recommendations for <br />resin storage life and conditions of storage (See Resin and Materials Handling Section of <br />each Material Safety Data Sheet) <br /> <br />• Wear protective eye wear, gloves, clothing, and organic respiratory equipment, as <br />necessary and as required by local, state and federal regulations. <br />DOCUMENTATION <br /> <br />When calculating quantities of resin and cure ingredients, special care should be taken to <br />ensure that all the chemicals have been properly weighed, added, and mixed together. <br />To help eliminate errors, it is recommended that only one individual be given the <br />responsibility of calculating, weighing, and mixing in the cure chemicals. In addition, <br />detailed information about each wet out and catalyst mix should be recorded and kept as <br />one part of record retention and quality control. The type of information that is helpful <br />includes: <br /> <br />• Job specifics (project, manhole sections, pipe/tube length, etc.) <br />• Process Times (beginning, end, specific mix times, pumping, etc.) <br />• Process Temperatures (air, chemicals, pre and post-mix resin temperature, <br />tube storage) <br />• Gel time test information <br />• Special Considerations (use of ice, equipment problems, delays) <br /> <br />The wet-out Request and Wet-out Report are examples of the type of information that is <br />helpful. <br /> <br />
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