5.3 Butane flame ignition source
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Assembly - IMO Resolution A.652(16) – Recommendation of Fire Test Procedures for Upholstered Furniture – (Adopted on 19 October 1989) - Annex - Recommendation of Fire Test Procedures for Upholstered Furniture - (Methods of test for the ignitability by smokers' materials of upholstered composites for seating) - 5 Apparatus - 5.3 Butane flame ignition source

5.3 Butane flame ignition source

  Note: This source has been designed to give a calorific output approximating to that of a burning match.

 A burner tube consisting of a length of stainless steel tube (8.0 ± 0.1 mm outside diameter, 6.5 ± 0.1 mm internal diameter and 200 ± 5 mm in length) is connected by flexible tubing to a cylinder containing butane via a flowmeter, fine control valve, on-off valve (optional) and cylinder regulator providing an outlet pressure of 27.5 mbar footnote.

  Note: Such steel tubing may be marketed as 5/16 in outside diameter, 0.028 in wall thickness. Where tubing of these dimensions is not readily available, stainless steel tubing of approximately similar dimensions may be used providing that the 50 mm length at the "flame" end of the tube is machined to the given sizes.

 The flowmeter shall be precalibrated to supply a butane gas flow rate at 25°C of 45 ± 2 ml/min. The flexible tubing connecting the output of the flowmeter to the burner tube shall be 2.5 m to 3.0 m in length with an internal diameter of 7.0 ± 1.0 mm.

  Notes:

  • 1. Under these conditions, the flame height is approximately 35 mm. Any divergence from this height may be due to lack of equilibration of the butane gas with the environmental conditions specified for test. A sufficient length of tubing should be provided within the controlled environment (23 ± 7°C) to ensure that the butane achieves the required temperature before flow measurement.

  • 2. Butane/propane mixture may be used as fuel for the flame ignition source provided that the same calorific output as that prescribed in the paragraph above is maintained.

Parent topic: 5 Apparatus
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