ISO 15541 pdf download.Ships and marine technology — Fire resistance of hose assemblies — Requirements for the test bench
1 Scope
This International Standard specifies requirements for a test bench to determine the fire resistance of hose assemblies, in particular by tests according to ISO 1 5540, up to at least 1 00 mm nominal diameter. During the exposure to flames, there are possible working pressures up to 1 0 bar. The flame spread ability of the hose cannot be tested with the test bench specified in this International Standard. Only water is permitted as a test medium. With a view to ensuring maximum safety for both the operating personnel and the test bed in the event of damage to the hose during the test, the use of combustible test media is excluded.
2 Normative reference(s)
The following normative documents contain provisions that, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 1 5540:1 999, Ships and marine technology — Fire resistance of hose assemblies — Test methods . IEC 60051 -1 :1 984, Direct acting indicating, analogue electrical-measuring instruments and their accessories — Part 1 : Definitions and general requirements common to all parts. IEC 60051 -1 , Amendment No. 1 :1 994 . IEC 60051 -1 , Amendment No. 2:1 995 .
3 Term and definition
For the purposes of this International Standard, the following term and definition applies. 3.1 fire resistance ability of an element of building construction, component or structure, to fulfil for a stated period of time the required stability, integrity, thermal insulation and/or other expected duty specified, in a standard fire resistance test
4.2 Burner chamber
4.2.1 General The connections of the test piece shall be arranged to an operation height (e.g. 1 1 00 mm). They shall enable testing of hose assemblies with a free length of hose of 500 mm minimum. A steady air flow upwards shall be provided. The base area of the air supply shall be approximately 0,6 m 2 . An example of an arrangement of a burner chamber, is shown in Figure 2. 4.2.2 Burner The total sectional area of the burner shall be 1 50 mm ¥ 500 mm minimum. The sectional area can consist of several single-area burner units. Burners with a minimum of 20 nozzles per square decimetre shall be used. Burners shall be of the fan type. Each single-area burner unit shall be provided with a mixing valve for mixing the gases and the combustion air, creating a neutral flame of (800 ± 50) °C below the hose assembly on test. The burner shall be movable to avoid exposing the test piece to the flames during adjustment of the flame. The burner shall be variable in height in order that the flame can envelop test pieces of all possible nominal diameters. Temperatures measured, approximately 1 5 mm directly under the test piece, shall be (800 ± 50) °C. 4.2.3 Exhaust trunk The exhaust gas shall be drawn off upwards by means of an exhaust fan. The fan shall be infinitely variable. The upward air flow shall produce a directed flame. Environmental restrictions according to local law shall be taken into consideration. 4.2.4 Coolant circuit For controlling the coolant circuit, shut-off valves and measuring instruments shall be provided in the coolant supply and drain line.
4.3 Aggregate box
Heating and cooling arrangements shall be provided for supplying the test piece with water of (80 ± 2) °C at the test piece inlet. The velocity of flow of the test medium in the test piece shall be adjustable to 0,1 m/s. The installation shall provide for an adjustable working pressure up to 1 0 bar during the fire test, with the test piece fitted.