GB/T 5169.21-2017Fire hazard testing for electric and electronic products -- Part 21: Abnormal heat -- Ball pressure test method (English PDF)

Foreword

GB/T 5169 Fire Hazard Testing for Electric and Electronic Products has published or

plans to publish the following parts:

--- Part 1: Terminology Concerning Fire Tests;

--- Part 2: Guidance for Assessing the Fire Hazard - General Guidelines;

--- Part 5: Test Flame Needle Flame Test Method Apparatus - Confirmation Test

Method and Guidance;

--- Part 9: Guidance for Assessing the Fire Hazard - Pre-Selection Testing

Procedures - General Guidelines;

--- Part 10: Glow/Hot-Wire Based Test Methods - Glow-Wire Apparatus and

Common Test Procedure;

--- Part 11: Glowing/Hot-Wire Based Test Methods - Glow-Wire Flammability Test

Method for End-Products;

--- Part 12: Glowing/Hot-Wire Based Test Methods - Glow-Wire Flammability Index

(GWFI) Test Method for Materials;

--- Part 13: Basic Test Methods for Glowing Filament/Hot-Wire - Test Methods for

Glow Wire Ignition Temperature (GWIT);

--- Part 14: Test Flames - 1kW Nominal Pre-Mixed Flame - Apparatus,

Confirmatory Test Arrangement and Guidance;

--- Part 15: Test Flames - 500W Flames - Apparatus and Confirmation Test

Methods;

--- Part 16: Test Flames - 50W Horizontal and Vertical Flame Test Methods;

--- Part 17: Test Flames - 500W Flame Test Method;

--- Part 18: Toxicity of Fire Effluent - General Guidance;

--- Part 19: Abnormal Heat - Mould Stress Relief Distortion Test;

--- Part 20: Surface Spread of Flame - Summary and Relevance of Test Methods;

--- Part 21: Abnormal Heat -Ball Pressure Test;

--- Part 22: Test Flames - 50W Flame - Apparatus and Confirmational Test Method;

--- Part 23: Test Flames - 500W Vertical Flame Test Method for Tubular Polymeric

Materials;

--- Part 24: Guidance for Assessing the Fire Hazard - Insulating Liquids;

--- Part 25: Smoke Obscuration - General Guidance;

--- Part 26: Smoke Obscuration - Summary and Relevance of Test Methods;

--- Part 27: Smoke Obscuration - Small-Scale Static Test - Description of the

Apparatus;

--- Part 28: Smoke Obscuration - Small-Scale Static Test - Materials;

--- Part 29: Heat Release - General Guidance;

--- Part 30: Heat Release - Summary and Relevance of Test Methods;

--- Part 31: Surface Spread of Flame - General Guidance;

--- Part 32: Heat Release - Heat Release of Insulating Liquid;

--- Part 33: Guidance for Assessing the Fire Hazard - Ignitability - General Guidance;

--- Part 34: Guidance for Assessing the Fire Hazard - Ignitability - Summary and

Relevance of Test Methods;

--- Part 35: Corrosion Damage Effects of Fire Effluent - General Guidance;

--- Part 36: Corrosion Damage Effects of Fire Effluent - Summary and Relevance of

Test Methods;

--- Part 38: Toxicity of Fire Effluent - Summary and Relevance of Test Methods;

--- Part 39: Toxicity of Fire Effluent - Use and Interpretation of Test Results;

--- Part 40: Toxicity of Fire Effluent - Estimation of Toxic Potency - Apparatus and

Test Method;

--- Part 41: Toxicity of Fire Effluent - Estimation of Toxic Potency - Calculation and

Interpretation of Test Results;

--- Part 42: Test Flames - Confirmatory Tests - Guidance;

--- Part 44: Guidance for Assessing the Fire Hazard - Fire Hazard Assessment.

This Part is Part 21 of GB/T 5169.

This Part was drafted as per the rules specified in GB/T 1.1-2009.

This Part replaced GB/T 5169.21-2006 Fire Hazard Testing for Electric and Electronic

Products - Part 21: Abnormal Heat - Ball Pressure Test. Compared with GB/T 5169.21-

2006, the major technical changes of this Standard are as follows:

--- Add the purpose of the test method (see Clause 1 of this Edition; Clause 1 of

2006 Edition);

--- Add terms and definitions (see Clause 3 of this Edition);

--- Increase the accuracy requirements of the temperature measuring device (see

5 and 7 of 2006 Edition);

--- Modify the observation method of test results (indentation) (see 8.4, 8.5 and

Figure 2 of this Edition; 7.2 and Figure 2 of 2006 Edition);

--- Add the provisions on the test report format (see Clause 11 of this Edition);

--- Add Annex A "Correlation between Ball Pressure Test and Vicat Softening

Temperature Test of ISO 306" (see Annex A of this Edition);

--- Add Annex B " Indentation Depth Method" (see Annex B of this Edition).

This Part uses the translation method to equivalently adopt IEC 60695-10-2:2014 Fire

Hazard Testing - Part 10-2: Abnormal Heat- Ball Pressure Test Method.

The Chinese documents that have a consistent correspondence with the international

documents cited in this Part are as follows:

--- GB/T 308.1-2013 Rolling Bearings - Balls - Part 1: Steel Balls (ISO 3290-1:2008,

NEQ);

--- GB/T 5471-2008 Plastics - Compression Moulding of Test Specimens of

Thermosetting Materials (ISO 295:2004, IDT);

--- GB/T 9352-2008 Plastics - Compression Moulding of Test Specimens of

Thermoplastic Materials (ISO 293:2004, IDT);

--- GB/T 11026.4-2012 Electrical Insulating Materials - Thermal Endurance

Properties - Part 4: Ageing Ovens - Single-Chamber Ovens (IEC 60216-4-1:2006,

IDT);

--- GB/T 16499-2008 The Preparation of Safety Publication and the Use of Basic

Safety Publications and Group Safety Publications (neq IEC Guide 104:1997);

Fire Hazard Testing for Electric and Electronic

Products - Part 21: Abnormal Heat - Ball Pressure Test

Method

1 Scope

This Part of GB/T 5169 specifies the ball pressure test as a method for evaluating the

softening temperature and accelerated material flow under load of polymeric materials

and parts of end products in their ability to resist abnormal heat. It is applicable to the

materials used in electrotechnical equipment, subassemblies and components, and to

solid electrical insulating materials except ceramics.

NOTE: The Ball Pressure test method is not appropriate for certain elastomers, foamed

materials, and other materials that tend to be soft at room temperature. Product Committees

are encouraged to evaluate these materials using other methods such as IEC 60695-10-3[3].

This basic safety publication is intended for use by technical committees in the

preparation of standards in accordance with the principles laid down in IEC Guide 104

and ISO/IEC Guide 51.

One of the responsibilities of a technical committee is, wherever applicable, to make

use of basic safety publications in the preparation of its publications. The requirements,

test methods or test conditions of this basic safety publication will not apply unless

specifically referred to or included in the relevant publications.

2 Normative References

The following documents are essential to the application of this document. For the

dated documents, only the versions with the dates indicated are applicable to this

document; for the undated documents, only the latest version (including all the

amendments) is applicable to this document.

ISO 293 Plastics - Compression Moulding of Test Specimens of Thermoplastic

Materials

ISO 294 (all parts) Plastics - Injection Moulding of Test Specimen of

Thermoplastic Materials

ISO 295 Plastics - Compression Moulding of Test Specimens of Thermosetting

......