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ISO 8469-2013 pdf free download
ISO 8469-2013 pdf free download.Small craft Non-fire-resistant fuel hoses Petits navires — Tuyaux souples pour carbu rant non résistants au feu.
5.9 Cold flex test
For straight hoses of 19 mm inner diameter and smaller, condition three hose samples for 5 h at an ambient temperature of —20 °C ± 2 °C. Flex in the cold chamber through 180° from the centreline to a diameter of 10 times the maximum outside diameter of the hose. The flexing shall take place within 4s and the hose shall not fracture or show any cracks, checks or breaks in the tube or cover.
For straight hoses larger than 19 mm inner diameter and all pre-formed hoses, prepare three samples
(100 ± 5) mm x (6 ± 1) mm from the whole hose wall and condition them for 5 h at a temperature of
-20 °C ± 2 °C in an unrestrained loop, position between two jaws 50 mm wide and 64 mm apart. While
in the cold chamber, bring the jaws together rapidly until they are 25 mm apart. The samples shall not
fracture or show any cracks, checks or breaks.
5.10 Abrasion test — 38 mm inner diameter and larger fuel fill hose with embedded wire reinforcement
Hose samples of 38 mm inner diameter shall be selected for the test. Larger inner diameter hose sizes to be qualified by the test shall not have a cover thickness or construction less than those of the test samples.
Three identical 38 mm inner diameter hose samples shall be tested. Condition hose samples for at least 24 hat a temperature of 23 °C ± 2 °C and 50% ± 5 % relative humidity. The test hose shall be mandrel- (core.) supported and rotate at a constant speed of 80 rev/mm ± 2 rev/mm. Subject the hose to a laterally moving abrasive surface, i.e. 80 grit aluminium oxide (A1203) emery cloth, parallel to the longitudinal axis of the hose. The abrasive surface shall be (25 ± 5) mm x (75 ± 5) mm affixed to a hard surface which will cycle back and forth 75 mm ± 5 mm in each direction while loaded with a constant normal force of 45 N ± 5 N. One test cycle shall equal one 360° rotation of the outside diameter of the hose and one back and forth movement of the abrasive surface. After 1 000 cycles, the three test samples shall have no helical wire reinforcement exposed at the point of contact with the abrasive surface.
5.11 Dry heat resistance test
After heat ageing for 70 h at a temperature of 100 °C ± 2 °C, samples taken from the cover material shall not have a reduction in tensile strength of more than 20% or a reduction in elongation at break of more than 50% of the original values of the unheated samples.
5.12 Oil resistance test
After 70 h immersion in ISO 1817:2011 reference oil number 3 at a temperature of 100 °C ± 2 °C, samples taken from the cover shall not have a reduction of tensile strength or elongation at break exceeding 40 % or a volumetric change outside the range of —5 % to +25 % of the pre-immersion values. Samples taken from the cover material shall not have a volumetric change outside the range of 0% to +100%.ISO 8469-2013 pdf free download.
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