With the EEBD connected to a breathing machine as specified in Annex A and at a sinusoidal flow of 20 cycle/min x 1.75 l/stroke for the rated duration of the EEBD, but in any case at least 10min, the EEBD shall satisfy the requirements of 6.3 and 6.4.

　

With the EEBD connected to a breathing machine as specified in Annex A and at a sinusoidal flow of 25 cycle/min x 2,0 l/stroke for at least 3min, the EEBD shall satisfy the requirements of 6.3 and 6.4.

　

With the EEBD connected to a breathing machine as specified in Annex A and at a sinusoidal flow of 25 cycle/min x 2.00 l/stroke for at least 3min, the EEBD shall satisfy the requirements of 6.3 and 6.4.

　

Throughout the rated working duration test and overload test of the EEBD, the carbon dioxide concentration of the inhalation air/gas shall not exceed the value of 3% (by volume).

　

Throughout the rated working duration test and overload test of the EEBD, the oxygen content of the inhalation gas shall not be below 21% (by volume). A short time deviation to a level of not less than 17% and for a period of not more than 2 min of the test is permissible.

　

Throughout the rated working duration test [and overloading test] of the EEBD, the temperature of inhalation gas shall not exceed 50 ℃.

　

Throughout the rated working duration test [and overloading test], breathing resistance of the EEBD shall be as specified in 6.4.1 and 6.4.2.

　

At sinusoidal flows of 20 cycle/min x 1,75 l/stroke and 25 cycle/min x 2,0 l/stroke, the inhalation peak pressure shall be a negative pressure of not more than 750Pa and 1kPa respectively, and the exhalation peak pressure shall be a positive pressure of not more than 750Pa and 1kPa respectively.

　

Alternatively, at sinusoidal flows of 35 l/min, the sum of the inhalation and exhalation resistances shall not exceed 1.6kPa. At sinusoidal flows of 50l/min, the breathing resistance for inhalation as well as exhalation shall not exceed 2.0kPa.

　

At a sinusoidal flow of 20 cycle/min x 1,75 l/stroke, the inhalation peak pressure shall be a positive pressure, and the exhalation peak pressure shall be a positive pressure of not more than 750Pa. At a sinusoidal flow of 25 cycle/min x 2,0 l/stroke, the inhalation peak pressure shall be a positive pressure. and the exhalation peak pressure shall be a positive pressure of not more than 1 kPa.

　

The surface temperature shall be measured during performance tests on the breathing machine as specified in Annex A. Thermocouples shall be connected to points expected to turn hot. The temperature shall be measured and recorded and the highest temperature shall not exceed the temperature indicated in the specifications of the manufacturer.

　

The device shall have a mechanism which permits an adequate flow of oxygen into the breathing circuit. The flow rate of oxygen, depending on the type of mechanism, shall comply with 6.6.1 through 6.6.3.

　

The flow of oxygen shall be not less than 4 l/min down to 5% of the maximum filling pressure of the container.

　

The negative opening pressure of the lung governed supply mechanism shall not exceed be a negative pressure of more than 200 Pa.

　

The constant flow of oxygen shall be not less than 1.2 l/min down to 5% of the maximum filling pressure of the container. The negative opening pressure of the lung governed supply mechanism shall not exceed be a negative pressure of more than 200 Pa. EEBD shall be capable of supplying oxygen flow rate at least 80 l/min.

　

An EEBD which includes a full face piece or closed hood shall be tested for leak-tightness at a negative or positive pressure of 1 kPa. The pressure change shall not be greater than 100 Pa in 1 min. This test shall be made with various parts closed as necessary.

　

6.8.1 If metallic high pressure tubes are used, valves and couplings shall be tested to prove that they are capable of withstanding a pressure of 150% of the maximum filling pressure of the compressed air/gas container.

6.8.2 Non-metallic high pressure components shall be tested to prove that they are capable of withstanding a pressure of twice the maximum filling pressure of the compressed air/gas container.

　

6.8.3 Medium pressure parts shall be tested to prove that they withstand twice the pressure for which they are designed to be used.

　

One complete set of EEBD, or the components of the EEBD which are likely to be exposed to flames during actual use, shall be tested by passing it once through a defined flame, and the effects of the flame on the EEBD shall be observed.

　

The apparatus (See Figure 2) shall be oriented such that the components to be tested passes through the test flame. The apparatus is on a support that enables it to be rotated in by means of motor or other device to describe a horizontal circle.

　

A gas supply rig consisting of a propane (at least 95 % purity) cylinder with flow control device, pressure gauge, flash back arrester and a propane burner of inner diameter 9,5 ± 0,5 mm., The fame of the burner shall be adjustable in height. The temperature of the flame at a height of 20 mm above the burner tip shall be 800 ± 50 ℃. The temperature shall be checked with a suitable measuring instrument.

　

　

The EEBD or the components of EEBD shall be placed on the apparatus such that the EEBD or components of EEBD is rotated over the burner in speed of (60 ± 5) mm/s.

　

The position of the burner shall be adjusted such that the distance between the tip of the burner and the lowest part of the EEBD or the components that is to pass through the flame is 20 mm. The apparatus shall be rotated away from the burner. The gas at the burner shall be ignited and the gas pressure shall be adjusted. It shall be ensured that the burner=s air vent is fully closed and the flow control valve shall be adjusted to give a flame height of 40 mm above the burner tip.

　

For the test the same sample shall be passed once through the flame at a speed of (60 ± 5) mm/s. When components which can not be exposed the flame by one test, such as valve, etc. are arranged on other parts of the apparatus the test shall be repeated with other EEBD in the appropriate positioning. Any one component shall be passed through the flame only once.

　

After exposure to the flame, the tested sample EEBD shall satisfy the requirements of 6.7 leak-tightness test.

　

(Put here a copy of Figure 2 of EN 1146)

Figure 2 Apparatus for flammability test

　

The opening pressure of the relief valve shall be checked with a suitable pressure meter attached to the facepiece. 1.5 l/min of dry air shall be fed into the EEBD through the facepiece and the maximum pressure recorded shall be taken as the opening pressure of the relief valve, which shall be a positive pressure of not less than 100 Pa. When the relief valve is positioned in the breathing circuit before the regeneration cartridge then the pressure drop between the relief valve and the entry of the breathing bag shall be in no case be greater than the minimum opening pressure of the relief valve.

　

The effective volume of the breathing bag shall be at least 6 litres, which is determined by removing the air from the breathing bag and measuring it with gas meter in the following pressure ranges:

　

a) Constant flow type

　

b) Lung governed demand type

　

c) Without relief valve

When tested in accordance with method A or B of ISO 7854:1984, the flex cracking resistance of the material shall be at least 5,000 cycles. After the test no visible damage is permitted.

　

When tested in accordance with method A1 of ISO 4674: 1977, the tear resistance of the material shall be not less than 5 N for test samples cut at 90 °to each other.

　

Hood shall comply with the requirement in paragraph 6.8.3.

　

The mechanical strength of the eyepiece or transparent part shall be tested using a completely assembled facepiece mounted on a dummy head such that a steel ball (22 mm in diameter and approximately 44 g) falls normally from a height of 1.3 m onto the centre of the eyepiece or transparent part. After the test the face piece shall not be damaged in any way that may make it ineffective or cause injury to the wearer. After the test, the face piece shall meet the leak tightness requirements of 6.7.

　

The EEBD shall be tested by two adult test subjects practicing regularly with breathing apparatus. It shall be able to be donned easily and correctly within 20 s. Donning test shall be conducted in both light and dark conditions.

　

Two test subjects, who conducted the donning test, shall don the apparatus and make two return trips of the course shown in Annex B at a normal speed and confirm that:

　

a) Wearers can perform without difficulty each of the movements specified in the course.

b) Wearers do not experience abrasion, cuts, pain, pressure, etc. during the test.

c) Wearers do not experience breathing difficulty during the test.

d) The eyepiece or visor does not fog up or move such as to disturb the vision during the test.

e) No serious damage is found on apparatus

　

The manufacturer of the EEBD, or of any component of the EEBD, shall provide suitable instructions for operation, maintenance, and storage. The instructions shall be provided in the language or languages required by the competent authority. The instructions, as a minimum, shall be provided in a suitable format to include in the ship's training manual.

　

Each EEBD shall be marked with:

　

a) Name of the apparatus

b) Type of the apparatus

c) Year and month of the manufacturer

d) Manufacturer or his trade mark

e) Approval information

f) Expiration date of approval (if any)

g) Next date of servicing/retest (if any)

h) If training unit, it shall be clearly marked as such