UL 2039-2016 pdf download

UL 2039-2016 pdf download.Flexible Connector Piping for Fuels.
8 Vacuum Tests
8.1 General
8.1.1 Sets of three 3 ft (91 cm) lengths of each type and construction in Worst case sizes of connector pipe specified in each method shall be tested in accordance with:
a) Static Vacuum Test per 8.2, and
b) Cyclic Vacuum Test per 8.3.
8,1.2 Vacuum Tests shall use air as the test fluid, and unless otherwise specified, the leakage test shall be conducted using water as the test fluid. Leakage shall be detected by visual examination with or without dyes, leak solution, blotting paper, bubble submersion or any other accurate and repeatable method.
8.2 Static vacuum test
8.2.1 Each type and construction of connector pipe in worst case sizes shall be subjected to the Static Vacuum Test while operating at a lab temperature of 22 ±4°C (72 ±7°F),
8.2.2 All samples shall be subjected to a static vacuum of at least 25 inches Hg for 10 minutes followed by a repeat Leakage Test per 7.2 and Breakdown per 7.4 at lab temperature only.
8.2.3 The samples shall not be damaged after the static vacuum o leak after pressurizing. The average breakdown value for each sample set shall be at least 250 psig (1724 kPa) for primary. and/or 200 psig (1379 kPa) for secondary, with the average at least 10 tImes the rated pressure, or 70 percent of the as-received lab temperature breakdown average.
8.3 CyclIc vacuum test
8.31 Each type and construction of connector pipe in worst case sizes shall be subjected to the Cyclic Vacuum Test while operating at a lab temperature of 22 ±4°C (72 ±7°F)
8.3.2 All samples shall be subjected to alternating pressure cycles (mm 1 second at 0 and mm 5 seconds at rated vacuum) applied at 4 to 6 cycles per minute for 250,000 cycles followed by a repeat Leakage Test per 7.2 and Breakdown per 7.4 at lab temperature only.
8.3.3 The samples shall not be damaged after cyclic vacuum or leak after pressurizing. The average breakdown value for each sample set shall be at least 250 psig (1724 kPa) for primary and/or 200 psig (1379 kPa) for secondary, with the average at least 10 times the rated pressure, or 70 percent of the as-received lab temperature breakdown average.
9.3 Impact test
9,3.1 One set of three 6 ft (182 cm) samples of each connector pipe in worst case sizes shall be subjected to 6 ft-lb (8.1 Nm) impacts at 50°C (122°F) and minus 30°C (minus 22°F). each followed by a visual exam. After impacts at both temperatures, a repeat Leakage test per 7.2 and the Breakdown test per 7.4 shall be conducted at only lab temperature.
9.3.2 All samples shall rest on a hard surface and be impacted with a 2-inch (51 -mm) OD steel ball after reaching the specified temperatures, with the impact height measured from sample target area. One sample shall be impacted three hines per temperature, at target areas of the pipe center, end titling and pipe near the fitting respectively. Use of a ball guide to hit the target areas is permitted.
9.3.3 The samples shall not be damaged after impacting or leak after pressurizing. The average breakdown value for each sample set shall be at least 250 pslg (1724 kPa) (primary), and/or 200 psig (1379 kPa) (secondary). with the average at least 10 times the rated pressure, or 70 percent of the as-received lab temperature breakdown average.
9.4 Puncture test
9.4.1 One set of three 3-foot (91-cm) samples of each connector pipe in worst case sizes shall be subjected to 15 lb (6.8 kg) point load foi’ one hour at 50°C (122°F) and minus 30°C (minus 22°F) each followed by a visual exam. After punctures at both temperatures, repeat Leakage test per 7.2 and Breakdown test per 7.4 shall be conducted at only lab temperature.
9.4.2 All samples shall rest on a hard surface, and the point load shall be applied at the pipe center perpendicular to the surface through a 5.0 mm (0.20 inch) diameter steel shaft with a 1,0 mm (0.04 inch) diameter tip and 30 degree edge. New locations shall be tested at each temperature.
9.4.3 The sample containment wall shall not be punctured or leak after pressurizing. The average breakdown value for each sample set shall be at least 250 pslg (1724 kPa) ( primary), and/or 200 psig (1379 kPa) (secondary), with the average at least 10 times the rated pressure, or 70 percent of the as-received lab temperature breakdown average.
9.5 FItting torque test
9.5.1 One set of three 3-foot (91-cm) samples of each connector pipe In worst case sizes with threaded fittings or flange bolts shall each be connected to mating Schedule 40 steel pipe or bushing at 1.5 times the manufacturer’s recommended torque, with one end of each sample assembled at 50°C (122°F) and minus 30°C (minus 22°F) respectively.