MSC.1/Circ.1271
GUIDELINES FOR THE APPROVAL OF HIGH-EXPANSION FOAM SYSTEMS USING INSIDE AIR FOR THE PROTECTION OF MACHINERY SPACES AND CARGO PUMP-ROOMS

Annex. GUIDELINES FOR THE APPROVAL OF HIGH-EXPANSION FOAM SYSTEMS USING INSIDE AIF FOR THE PROTECTION OF MACHINERY SPACES AND CARGO PUMP-ROOMS

1. General

2. Definitions

3. Principal requirements for the system

3.1 Principal performance:

3.2 Requirements for the system:

3.3 Testing requirements:

APPENDIX 1. COMPONENT MANUFACTURING STANDARDS FOR INSIDE AIR FOAM SYSTEMS

APPENDIX 2. FIRE TEST METHOD FOR INSIDE AIR FOAM SYSTEMS

1. Scope

2. Sampling

3. Fire tests

3.1 Test principles

3.2 Test description

4. Test procedure

4.1 Preparation

4.2 Measurements

4.3 Pre-burn

4.4 Duration of test

4.5 Observations before the fire test

4.6 Observations during the fire test

4.7 Observations after fire test

5. Classification criteria

6. Test report

7. Application of test results

APPENDIX 3. FOAM GENERATOR TESTS

1. Foam generator capacity test

APPENDIX 4. OPTIONAL SMALL SCALE TEST METHOD FOR HIGH-EXPANSION FOAM CONCENTRATES TO BE USED WITH INSIDE AIR

1. Scope

2. Definitions

3. Sampling

4. Method of test

4.1 Principle

4.2 Test equipment

4.3 Tolerances

5. The fire test compartment*

5.1 General

5.2 Dimensions

5.3 Flame screen

5.4 Position of the high-expansion foam generator

5.5 Position of the propane gas burner

6. Premix pressure vessel and piping

7. The high-expansion foam generator

8. Instrumentation, measurements and measurement equipment

8.1 Gas temperature measurements

8.2 Foam system and water pressure

9. Fire test procedures

9.1 Test conditions

9.2 Verification of the temperature in the test compartment

9.3 Fire test procedures

10. Determination of foam properties

10.1 Principle

10.3 Foam expansion as a function of temperature

11. Test report

Fire Test Compartment

Interior of fire test compartment with principal layout of the foam system