UL 651-2018 pdf free download

UL 651-2018 pdf free download.Schedule 40 , 80 , Type EB and A Rigid PVC Conduit and Fittings.
6.4 Low-temperature handling
6.4.1 The material of which rigid PVC conduit is made and the method of manufacture of the conduit shall result in a finished product that does not shatter, chip, or crack when handled at low temperature as indicated in 6.4.2.
6.4.2 One 30 Inch (760 mm) specimen Is to be cut from sample lengths of each size of finished rigid PVC conduit. The ends of each specimen are to be smooth and perpendicular to the longitudinal axis of the conduit. The specimens are to be cooled in circulating air for five hours to a temperature of minus 20.0 ±1.0°C (minus 4,0 ±1.8°F). While still at the low temperature, each specimen is to be dropped onto a concrete floor twice in quick succession from a height of 60 inches (1525 mm). During the first drop, the specimen is to contact the floor at an angle of approximately 45 degrees so that one end of it reaches the floor first. For the second drop, the specimen is to fall parallel to the floor. The conduit shall not shatter, chip, or crack.
6.5 Water absorption
6.5.1 Finished rigid PVC conduit shall not absorb any more water than 0.50 percent of its own weight while immersed for 24 hours in distilled water. The test is to be done as indicated in 6.5.2 — 6.5.4 (similar to the 24-hour immersion in Standard Test Method for Water Absorption of Plastics, ASTM D 570).
6.5.2 Specimens are to be preconditioned by drying in a full-draft circulating-air oven at a temperature of
50.0 ±3.0°C (122.0 ±5.4°F) for 24 hours, after which they are to remain in still air at a temperature of 23.0
±2.0°C (73.4 ±3.6°F) for 24 hours.
6.5.3 A clean, dry specimen of finished rigid PVC conduit at least 6 inches (150 mm) long is to be preconditioned as indicated in 6.5.2; weighed (W1) to within 5 mg of balance; and then immersed for 24 hours in distilled water that is at a temperature of 23.0 ±2.0°C (73.4 ±3.6°F). The specimen is then to be removed from the water1 dried quickly inside and out with a clean piece of soft lintless cloth, and immediately reweighed (W2) to within 5 mg of balance. W2/W., shall not be larger than 1.0050.
6.5.4 If a sample is known to contain, or is suspected of containing, appreciable amounts of water-soluble material, two specimens are to be preconditioned by drying in a full-draft circulating-air oven at a temperature of 50.0 ±3.0°C (122.0 ± 5.4°F) for 24 hours, cooled in a desiccator for 24 hours, and immediately weighed (WI). The specimens are then to be immersed in distilled water for 24 hours with the water at a temperature of 23.0 ±2.0°C (73.4 ±3.6°F). Immediately following this immersion, the specimens are to be reconditioned for 24 hours in the oven at 50.0 ±3.0°C (122.0 ±5.4°F). cooled in a desiccator for 24 hours, and immediately reweighed (W2). The rigid PVC conduit is to be separately evaluated if W2 is less than W1.UL 651-2018 pdf free download.