BS EN 13617-2:2021 pdf free download – Petrol filling stations Part 2: Safety requirements for construction and performance of safe breaks for use on metering pumps and dispensers.
B.7.4 For re-usable safe breaks conduct this test 10 times.
B.8 Axial separation force test 2 to nozzle breaks and pump breaks
B.8.1 To determine whether the safe break operates at a force within specified limits when the applied force is axial, at maximum working pressure.
B.8..2 The safe break, internally pressurized with test liquid at a pressure of (350 ± 10) kPa [(3,5 ± 0,1) bar], shall be mounted in a test rig. An axial force applying tension across the safe break mechanism shall be applied from zero and increased at a rate of (2 000 ± 400) Ns1.
B.8.3 The force at which the safe break operates shall be recorded.
B.8.4 For re-usable safe breaks, conduct this test 10 times.
B.9 Non-axial separation force test 1 to nozzle breaks and pump breaks
B.9.1 To determine whether the safe break operates at a force within specified limits when the applied force is non-axial, at maximum working pressure.
B.9.2 The safe break, internally pressurized with test liquid at a pressure of (350 ± 10) kPa [(3,5 ± 0,1) bar], shall be mounted in a test rig. A non-axial force applying tension across the safe break
mechanism, at an angle of (3o÷) ° to the longitudinal axis, shall be applied from zero and increased at a rate of (200 ± 40) N s.
B.9.3 The force at which the safe break operates shall be recorded.
BlO Non-axial separation force test 2 to nozzle breaks and pump breaks
B.1O.1 To determine whether the safe break operates at a force within specified limits when the applied force is non-axial, at maximum working pressure.
B.1O.2 The safe break, internally pressurized with test liquid at a pressure of (350 ± 10) kPa [(3,5 ± 01) bar], shall be mounted in a test rig. A non-axial force applying tension across the safe break mechanism, at an angle of to the longitudinal axis, shall be applied from zero and increased at a
rate of(2 000 ± 400) N
B.1O.3 The force at which the safe break operates shall be recorded.
B.11 Axial separation force test 3
B.11.1 To determine whether the safe break operates at a force within specified limits at nominal, rest, pressure.
B.11.2 The safe break, internally pressurized with test liquid at a pressure of (30 ± 10) kPa [(0,3 ± 0,1) bar], shall be mounted in a test rig. An axial force applying tension across the safe break mechanism shall be applied from zero and increased at a rate of (200 ± 40) N s’.
B. 11.3 The force at which the safe break operates shall be recorded.
B.12 Axial separation force test 4
B.12.1 To determine whether the safe break operates at a force within specified limits at nominal, rest, pressure.
B.12.2 The safe break, internally pressurized with test liquid at a pressure of (30 ± 10) kPa [(0,3 ± 01) bar], shall be mounted in a test rig. An axial force applying tension across the safe break mechanism shall be applied from zero and increased at a rate of (2 000 ± 400) N s.
B.12.3 The force at which the safe break operates shall be recorded.
B.13 Liquid release test
B.13.1 To determine whether the liquid released when the safe break operates is limited. For a nozzle break without a fuel line valve downstream of the break, the volume released by the nozzle including the break coupling half connected to the nozzle shall be separately determined and subtracted from the total release to give the release due to the nozzle break
B.13.2 The safe break is pressurized with test liquid at a pressure of (350 ± 10) kPa [(3,5 ± 0,1) bar].