BS ISO 17339:2018 pdf download – Ships and marine technology — Life saving and fire protection — Sea anchors for survival craft and rescue boats

BS ISO 17339:2018 pdf download – Ships and marine technology — Life saving and fire protection — Sea anchors for survival craft and rescue boats Clamp a test specimen centrally so that its longitudinal centre-line passes through the centre point of the front edges of the jaws. Engage any device for recording the maximum force and elongation at maximum force. Put the movable clamp in motion and extend the test specimen to the point of rupture. Record the maximum force in newtons. Perform the test at least on five test specimens. 5.1.2.3 Compliance criteria The average of five samples shall comply with manufacturer’s specification. 5.1.3 Corrosion test for metal attachments Corrosion-resistant metal attachments shall be qualified by corrosion test in accordance with ISO 9227:2012. After the salt spray test, the metal attachments shall be subjected to strength test as described in 5.5 to demonstrate satisfactory operation. Stainless steel having a Pitting Resistance Equivalent Number (PREN) of 22 or higher does not need to be subjected to corrosion testing. 5.2 Temperature cycling test 5.2.1 Any specimen for the deployment test, the towing test and the strength test, as described in 5.3, 5.4 and 5.5, shall be subjected to the following temperature cycling prior to these tests. 5.2.2 The specimen shall be alternately subjected to surrounding temperatures of −30 °C and 65 °C. These alternating cycles need not follow immediately after each other and the following procedure, repeated for a total of 10 cycles, is acceptable: 1) an 8 h exposure at a minimum temperature of 65 °C to be completed in one day; 2) the specimen removed from the warm chamber that same day and left exposed under ordinary room conditions at a temperature of 20 °C ± 3 °C until the next day; 3) an 8 h exposure at a maximum temperature of −30 °C to be completed the next day; 4) the specimen removed from the cold chamber that same day and left exposed under ordinary room conditions at a temperature of 20 °C ± 3 °C until the next day. 5.3 Deployment test A sea anchor, in its packed condition, with its full length of towing line shall be thrown into water and the line shall then be pulled. The sea anchor shall then attain its designed shape immediately or within a distance of not more than 1 m. 5.4 Towing test 5.4.1 A fully deployed sea anchor...