Amendment 9
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC/Circular.809 – Recommendation for Canopied Reversible Liferafts, Automatically Self-Righting Liferafts and Fast Rescue Boats, Including Testing, on Ro-Ro Passenger Ships – (Adopted on 30 June 1997) - Annex - Recommendation for Canopied Reversible Liferafts, Automatically Self-Righting Liferafts and Fast Rescue Boats, Including Testing, on Ro-Ro Passenger Ships - Appendix - Recommendation on Testing of Canopied Reversible Liferafts, Automatically Self-Righting Liferafts and Fast Rescue Boats on Ro-Ro Passenger Ships - Amendment 9

Amendment 9

  9 The existing text of paragraph 5.17.9 and its title are replaced by the following:

 "Seam strength test

  • .1 It should be demonstrated that sample seams, prepared in the same condition as in production, can withstand a test load equal to the minimum specified liferaft fabric tensile strength;

  • .2 Weld strength

  • .2.1 When tested by the method prescribed below, the load required to initiate failure of the weld should be not less than 175 N;

  • .2.2 Specimens should be prepared and tested as given in .3.3 below:

  • .3 Hydrolysis tests should be conducted on sample welded seams where thermoplastic coated materials are to be used. The tests should be conducted as follows:

  • .3.1 When tested by the method prescribed below, the weld strength of the sample seam should achieve 125 N/25 mm minimum.

  • .3.2 Test method:

    • .1 Store the test specimens for 12 weeks over water in a closed container at 93 ± 2°C.

    • .2 After the conditioning as above, dry the specimens for 1 h at 80 ± 2°C and condition at 20 ± 2°C, 65% RH for 24 h.

  • .3.3 Welded test samples should be prepared as follows:

    Two samples of fabric 300 mm x 200 mm, cut with the short side parallel to the warp direction, should be superimposed face to back for double coated fabrics, or coated face to coated face for single or asymmetrically coated fabrics. They should be welded with a tool 10 ± 1 mm width of convenient length 25 mm wide test specimens should be cut transversely to the line of the weld. The test samples should be mounted in a test machine as in ISO 1421. The maximum peel load should be recorded."

Parent topic: Appendix - Recommendation on Testing of Canopied Reversible Liferafts, Automatically Self-Righting Liferafts and Fast Rescue Boats on Ro-Ro Passenger Ships
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