ASTM D5048测量固态塑料比较燃烧特性和抗烧穿性的标准试验方法

ASTM D5048 Standard Test Method for Measuring the Comparative Burning Characteristics and Resistance to Burn-Through of Solid Plastics Using 125-mm Flame
ASTM D5048利用125mm火焰测量固态塑料比较燃烧特性和抗烧穿性的标准试验方法

The test results represent afterflame plus afterglow time, in seconds, for a material under the conditions of the test. The test results for plaques also indicate whether or not the specified flame will burn through a material.
The effect of material thickness, colors, additives, deterioration, and possible loss of volatile components is measurable.

The burning characteristics vary with thickness. Compare test data with data for materials of similar thickness only.
The results serve as a reference for comparing the relative performance of materials and can be an aid in material selection.

In this test method, the specimens are subjected to specific laboratory test conditions. If different test conditions are substituted or the end-use conditions are changed, it will not always be possible by or from this test method to predict changes in the fire-test-response characteristics measured. Therefore, the results are valid only for the fire-test-exposure conditions described in this test method.

1. Scope
1.1 This fire-test-response test method covers a small-scale laboratory procedure for determining the relative burning characteristics and the resistance to burn-through of plastics using small bar and plaque specimens exposed to a 125-mm (500-W nominal) flame.
Note 1—This test method is equivalent to IEC 60695-11-20.
Note 2—For additional information on comparative burning characteristics of solid plastics in a vertical position, see Test Method D 3801.

1.2 This test method was developed for polymeric materials used for parts in devices and appliances. The results are intended to serve as a preliminary indication of their acceptability with respect to flammability for a particular application. The final acceptance of the material is dependent upon its use in complete equipment that conforms with the standards applicable to such equipment.

1.3 The classification system described in Appendix X1 is intended for quality assurance and the preselection of component materials for products.

1.4 If found to be appropriate, it is suitable to apply the requirements to other nonmetallic materials. Such application is outside the scope of this technical committee.

1.5 This test method is not intended to cover plastics when used as materials for building construction or finishing.
1.6 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.

1.7 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazards or fire risk assessment of materials, products, or assemblies under actual fire conditions.

1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. See 6.1.1 for a specific hazard statement.

2. Referenced Documents (purchase separately
ASTM Standards
ASTM D883 Terminology Relating to Plastics
ASTM D3801 Test Method for Measuring the Comparative Burning Characteristics of Solid Plastics in a Vertical Position
ASTM D5025 Specification for Laboratory Burner Used for Small-Scale Burning Tests on Plastic Materials
ASTM D5207 Practice for Confirmation of 20-mm (50-W) and 125-mm (500-W) Test Flames for Small-Scale Burning Tests on
Plastic Materials
ASTM E176 Terminology of Fire Standards
ASTM E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

IEC Standard
IEC60695-11-20 Fire Hazard Testing-Part 11-20: Test Flames - 500 W Flame Test Methods

Index Terms
burning characteristics; flammability; plastics; solid; resistance to burn-through; small-scale burning tests; vertical burning tests; Burning characteristics--plastics; Comparative burning characteristics; Flammability--plastics;

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 来源：防火网　发布时间：11/5/2013 点击次数：1972