GB/T 8627-2007Test method for density of smoke from the burning or decomposition of building materials (English PDF)

Foreword

This Standard modifies and adopts ASTM D2843-1999, Standard Test Method for

Density of Smoke from the Burning or Decomposition of Plastics (English edition).

This Standard was redrafted in accordance with ASTM D2843-1999. The cross

reference of the article numbers of this Standard and the article numbers of ASTM

D2843-1999 is listed in Appendix A.

In consideration of the national conditions of China, some modifications are made in

this Standard when it adopts ASTM D2843-1999; the list of these technical differences

and their reasons are given in Appendix B.

This Standard replaces GB/T 8627-1999, Test Method for Density of Smoke from the

Burning or Decomposition of Building Materials.

Compared with GB/T 8627-1999, the main technical changes of this Standard are as

follows.

-- it specifies the steel wire mesh opening size in specimen holder is 6 mm while

GB/T 8627-1999 only specifies the side length is 5 mm (see 2.1.5 of edition 1999);

-- it deletes the note "During a non-arbitration test, liquified petroleum gas can be

used as the fuel gas for test" (2.2.1 of edition 1999);

-- it specifies the working pressure of propane is changed from 210 kPa to 276 kPa

(see 4.3.1 of this edition); and

-- it adds special procedure for materials that drip and adds auxiliary burner and

collector tray and so on. Meanwhile, it adds optional procedure (see Article 8 and

Article 9).

Appendix A and Appendix B of this Standard are informative.

This Standard was proposed by the Ministry of Public Security of the People's Republic

of China.

This Standard shall be under the jurisdiction of Subcommittee 7 of the National

Technical Committee on Fire Protection (SAC/TC 113/SC 7).

The responsible drafting organization of this Standard. Sichuan Fire Research Institute

of Ministry of Public Security.

1 Application Scope

This Standard specifies the specific requirements for the test apparatus, test procedure,

calculation of test results and test report for density of smoke from the density or

decomposition of building materials.

This Standard specifies the test method for the measurement of volume of smoke

produced under controlled conditions of combustion or decomposition. The

measurements with this test method are made in terms of the loss of light transmission

through a collected volume of smoke produced under controlled, standardized

conditions. The apparatus is constructed so that the flame and smoke is observable

during the test.

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 hazard or fire risk assessment of the materials,

products, or assemblies under actual fire conditions.

2 Normative References

The provisions in following documents become the provisions of this Standard through

reference in this Standard. For dated references, the subsequent amendments

(excluding corrigendum) or revisions do not apply to this Standard, however, parties

who reach an agreement based on this Standard are encouraged to study if the latest

versions of these documents are applicable. For undated references, the latest edition

of the referenced document applies.

GB/T 2918-1998, Plastics – Standard Atmospheres for Conditioning and Testing

( idt. ISO 291.1997)

3 Test Method

90 percent of the light beam, the meter shall be set to its basic sensitivity, by any

appropriate manner. By doing this, the scale in the meter will then read from 90 to 100 %

absorption instead of reading from 0 to 100 % absorption.

5 Test Specimen

6 Conditioning

8 Special Procedure

11 in Figure 5).

9 Optional Procedure