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    Article 10 Mandatory Appendices: Appendix I - Bubble Test - Direct Pressure Technique I-1000

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    arsssy
    This document provides testing procedures for two bubble leak testing techniques: direct pressure and vacuum box. The direct pressure technique pressurizes a component and applies a bubble solution to locate leaks, which appear as continuous bubble growth. It specifies equipment, test parameters like temperature and pressure hold time, application of the solution, and evaluation of results. The vacuum box technique tests components that cannot be pressurized directly by applying a solution under a box where vacuum is created. This differential pressure causes bubbles to form at leaks. It also specifies equipment, temperature, application of solution, vacuum box use, and evaluation. Both techniques are used to locate leaks through precise bubble observation.

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    Article 10 Mandatory Appendices: Appendix I - Bubble Test - Direct Pressure Technique I-1000

    Uploaded by

    arsssy
    140 views2 pages
    This document provides testing procedures for two bubble leak testing techniques: direct pressure and vacuum box. The direct pressure technique pressurizes a component and applies a bubble solution to locate leaks, which appear as continuous bubble growth. It specifies equipment, test parameters like temperature and pressure hold time, application of the solution, and evaluation of results. The vacuum box technique tests components that cannot be pressurized directly by applying a solution under a box where vacuum is created. This differential pressure causes bubbles to form at leaks. It also specifies equipment, temperature, application of solution, vacuum box use, and evaluation. Both techniques are used to locate leaks through precise bubble observation.

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    Pheumatic test

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    Pheumatic Test

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    This document provides testing procedures for two bubble leak testing techniques: direct pressure and vacuum box. The direct pressure technique pressurizes a component and applies a bubble solution to locate leaks, which appear as continuous bubble growth. It specifies equipment, test parameters like temperature and pressure hold time, application of the solution, and evaluation of results. The vacuum box technique tests components that cannot be pressurized directly by applying a solution under a box where vacuum is created. This differential pressure causes bubbles to form at leaks. It also specifies equipment, temperature, application of solution, vacuum box use, and evaluation. Both techniques are used to locate leaks through precise bubble observation.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    140 views2 pages

    Article 10 Mandatory Appendices: Appendix I - Bubble Test - Direct Pressure Technique I-1000

    Uploaded by

    arsssy
    This document provides testing procedures for two bubble leak testing techniques: direct pressure and vacuum box. The direct pressure technique pressurizes a component and applies a bubble solution to locate leaks, which appear as continuous bubble growth. It specifies equipment, test parameters like temperature and pressure hold time, application of the solution, and evaluation of results. The vacuum box technique tests components that cannot be pressurized directly by applying a solution under a box where vacuum is created. This differential pressure causes bubbles to form at leaks. It also specifies equipment, temperature, application of solution, vacuum box use, and evaluation. Both techniques are used to locate leaks through precise bubble observation.

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    ARTICLE 10

    MANDATORY APPENDICES

    APPENDIX I — BUBBLE TEST — I-1070 TEST


    DIRECT PRESSURE TECHNIQUE I-1071 Soak Time
    I-1000 INTRODUCTION Prior to examination the test pressure shall be held
    I-1010 SCOPE for a minimum of 15 min.

    The objective of the direct pressure technique of


    bubble leak testing is to locate leaks in a pressurized
    component by the application of a solution or by I-1072 Surface Temperature
    immersion in liquid that will form bubbles as leakage
    As a standard technique, the temperature of the
    gas passes through it.
    surface of the part to be examined shall not be below
    40°F (4°C) nor above 125°F (52°C) throughout the
    examination. Local heating or cooling is permitted
    provided temperatures remain within the range of 40°F
    I-1030 EQUIPMENT
    (4°C) to 125°F (52°C) during examination. Where it
    I-1031 Gases is impractical to comply with the foregoing temperature
    limitations, other temperatures may be used provided
    Unless otherwise specified, the test gas will normally
    that the procedure is demonstrated.
    be air; however, inert gases may be used.

    NOTE: When inert gas is used, safety aspects of oxygen deficient


    atmosphere should be considered.
    I-1073 Application of Solution
    The bubble forming solution shall be applied to the
    I-1032 Bubble Solution surface to be tested by flowing, spraying, or brushing
    the solution over the examination area. The number of
    (a) The bubble forming solution shall produce a film bubbles produced in the solution by application should
    that does not break away from the area to be tested, be minimized to reduce the problem of masking bubbles
    and the bubbles formed shall not break rapidly due to caused by leakage.
    air drying or low surface tension. Household soap or
    detergents are not permitted as substitutes for bubble
    testing solutions.
    (b) The bubble forming solution shall be compatible I-1074 Immersion in Bath
    with the temperature of the test conditions.
    The area of interest shall be placed below the surface
    of the bath in an easily observable position.

    I-1033 Immersion Bath


    (a) Water or another compatible solution shall be
    I-1075 Lighting and Visual Aids
    used for the bath.
    (b) The immersion solution shall be compatible with When performing the test, the requirements of Article
    the temperature of the test conditions. 9, T-952 and T-953 shall apply.

    193
    I-1076 1998 SECTION V II-1073

    I-1076 Indication of Leakage (c) The bubble forming solution shall be compatible
    with the temperature conditions of the test.
    The presence of continuous bubble growth on the
    surface of the material indicates leakage through an
    orifice passage(s) in the region under examination. II-1032 Vacuum Box
    The vacuum box used shall be of convenient size
    I-1077 Post-Test Cleaning [e.g., 6 in. (152 mm) wide by 30 in. (762 mm) long]
    After testing, surface cleaning may be required for and contain a window in the side opposite the open
    product serviceability. bottom. The open bottom edge shall be equipped with
    a suitable gasket to form a seal against the test surface.
    Suitable connections, valves, lighting, and gage shall
    I-1080 EVALUATION be provided. The gage shall have a range of 0 psi
    (0 kPa) to 15 psi (103 kPa), or equivalent pressure
    (a) Unless otherwise specified by the referencing units such as 0 in. Hg to 30 in. Hg. The gage range
    Code Section, the area under test is acceptable when limit requirements of T-1031(a) do not apply.
    no continuous bubble formation is observed.
    (b) When leakage is observed, the position of the
    leak(s) shall be marked. The component will then be II-1033 Vacuum Source
    depressurized, and the leak(s) repaired as required by
    the referencing Code Section. After repairs have been The required vacuum can be developed in the box
    made, the repaired area or areas shall be retested in by any convenient method (e.g., air ejector, vacuum
    accordance with the requirements of this Appendix. pump, or motor intake manifold). The gage shall register
    a partial vacuum of at least 2 psi (4.1 in. Hg) (13.8 kPa)
    below atmospheric pressure or the partial vacuum re-
    quired by the referencing Code Section.
    APPENDIX II — BUBBLE TEST —
    VACUUM BOX TECHNIQUE
    II-1000 INTRODUCTION II-1070 TEST
    II-1010 SCOPE II-1071 Surface Temperature
    The objective of the vacuum box technique of bubble As a standard technique, the temperature of the
    leak testing is to locate leaks in a pressure boundary surface of the part to be examined shall not be below
    that cannot be directly pressurized. This is accomplished 40°F (4°C) nor above 125°F (52°C) throughout the
    by applying a solution to a local area of the pressure examination. Local heating or cooling is permitted
    boundary surface and creating a differential pressure provided temperatures remain in the range of 40°F
    across that local area of the boundary causing the (4°C) to 125°F (52°C) during the examination. Where it
    formation of bubbles as leakage gas passes through is impractical to comply with the foregoing temperature
    the solution. limitations, other temperatures may be used provided
    that the procedure is demonstrated.

    II-1030 EQUIPMENT
    II-1031 Bubble Solution II-1072 Application of Solution

    (a) The bubble forming solution shall produce a film The bubble forming solution shall be applied to the
    that does not break away from the area to be tested, surface to be tested by flowing, spraying, or brushing
    and the bubbles formed shall not break rapidly due to the solution over the examination area before placement
    air drying or low surface tension. The number of of the vacuum box.
    bubbles contained in the solution should be minimized
    to reduce the problem of discriminating between existing
    II-1073 Vacuum Box Placement
    bubbles and those caused by leakage.
    (b) Soaps or detergents designed specifically for The vacuum box shall be placed over the solution
    cleaning shall not be used for the bubble forming coated section of the test surface and the box evacuated
    solution. to the required partial vacuum.

    194

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