SAE J318:2021 pdf download

SAE J318:2021 pdf download Automotive Air Brake Line Couplers (Gladhands)
4. TEST PROCEDURE
4.1 Corrosion Resistance Test J318™ JUN2021 Page 5 of 7 Two new pairs of couplers (one pair properly coupled with the threaded ports plugged and without internal pressure, and one pair uncoupled with the threaded ports plugged) shall be subjected to ASTM B117 for 240 hours. The customer may require additional tests be conducted according to SAE J2721.
4.2 Endurance Test A new pair of couplers shall be coupled and uncoupled in the normal manner for 2500 complete cycles at a rate (speed) of 15 to 25 cpm. One complete cycle shall consist of one coupling and one uncoupling.
4.3 Break Away Test Properly joined, a new pair of couplers shall be pulled apart ten times when connected to a line having 931 kPa ± 34 kPa (135 psi ± 5 psi) air pressure under a gradually applied load of not less than 222 N (50 lbf) nor more than 1334 N (300 lbf) along the hose axis.
4.4 Drop Test Two new couplers shall be dropped from 1.8 m (6 feet) minimum onto concrete surface immediately after exposure to a temperature of -40 °C ± 3 °C (-40 °F ± 5 °F) for a minimum of 6 hours. Orientation of the couplers shall be such that the couplers impact the concrete surface at points A and B as indicated in Figures 1 to 3.
4.5 Elevated Temperature Two new pairs of couplers (one properly coupled and one uncoupled) shall be exposed to a temperature of +70 °C ± 3 °C (+158 °F ± 5 °F) for a minimum of 24 hours.
4.6 Low Temperature Two new pairs of couplers (one properly coupled and one uncoupled) shall be exposed to a temperature of -40 °C ± 3 °C (-40 °F ± 5 °F) for a minimum of 6 hours.
5. PERFORMANCE REQUIREMENTS After standard completion of each test procedure shown under Section 4, the coupler(s) shall satisfy each of the following performance requirements.
5.1 Coupling and Uncoupling Torque Performance The torque required to uncouple a pair of couplers in a normal manner at an ambient temperature of +24 °C ± 8 °C (+75 °F ± 15 °F) and at 689 kPa ± 34 kPa (100 psi ± 5 psi) air pressure shall be 11.3 Nm ± 5.6 Nm (100 lbf-in ± 50 lbf-in). The torque required to couple and uncouple a pair of couplers at an ambient temperature of +24 °C ± 8 °C (+75 °F ± 15 °F) and at 0 kPa (0 psi) air pressure shall be 11.3 Nm ± 5.6 Nm (100 lbf-in ± 50 lbf-in). 5.2 Leak Rate A pair of coupler halves, when joined properly is allowed a maximum leak rate of 25 SCCM of free air at 931 kPa ± 34 kPa (135 psi ± 5 psi) air pressure and ambient temperature of +24 °C ± 8 °C (+75 °F ± 15 °F).