subject: GB 8624-1997 standard fireproof materials - refractory - Precision Fasteners - CNC Machining Parts [print this page] GB 8624-1997 standards for fire prevention materials Standard type Standard Name (English) Standard No. Standard Issued Release Date Standard Date Standards Standard text Foreword This standard is GB8624-88 revision. Non-equivalent in technical content, using the German standard DIN4102-81 Part. The revision, compared with the GB8624-88, the addition of A-level composite (sandwich) materials, and according to my Country-specific circumstances, an increase of the specific uses of flooring, curtains and curtain type textiles, wire and cable casing Class plastic materials and pipe insulation foam used specified. If the specific use of materials as Wall or ceiling materials used, still must be Chapter 4 of the standard provisions of Chapter 5 of the inspection and grading. This standard from the effective date of the original GB8624-88 shall be invalid. The People's Republic of China Ministry of Public Security This standard is raised. This standard by the National Fire Protection Standardization Technology Committee Sub-Committee under the jurisdiction of the seventh. The standard Ministry of Public Security of Sichuan Fire Research Institute is responsible for drafting. Main drafters of this standard: Qian Jianmin, Ma Xianglin, Lu National Development. The standard first released in February 1988. The People's Republic of China national standard GB 8624-1997 Classification flammability of building materials Instead of GB 8624-88 Classification on burning behaviour for building materials 1 Subject Matter and Scope This standard specifies the combustion properties of materials evaluation and classification standards. This standard applies to all kinds of industrial and civil engineering structures used in a variety of decorative materials and equipment Repair materials. 2 Normative references Following standards contain provisions which, through reference in this standard, constitute the standard provisions. The standard Time of publication, the editions indicated were valid. All standards are subject to revision, the parties should explore the standard so that With the possibility of the latest version of the following criteria. GB/T2406-93 Test method for flammability of plastic oxygen index GB/T2408-80 Test method for flammability of plastic the level of combustion GB/T4609-84 Test method for flammability of plastic vertical burning GB/T5454-85 burning properties of textile fabrics Determination of oxygen index GB/T5455-85 Determination of vertical flame retardant textile fabrics method GB/T5464-85 not flammable building materials test methods GB/T8332-87 foam combustion behavior of horizontal combustion GB/T8333-87 hard foam combustion vertical burning test methods GB/T8625-88 flammability for building materials test method GB/T8626-88 materials flammability test methods GB/T8627-88 combustion or decomposition of materials test methods for smoke density GB/T8629-88 test used in the family textile washing and drying procedures GB/T11785-89 paving Critical Radiant Flux from a radiant heat source method GB/T14402-93 Test method of heat burning building materials GB/T14403-93 combustion heat test methods for building materials 3 level of flammability of building materials and name Level of flammability of building materials and names in Table 1. Table 1 Combustion level and name -Level name A noncombustible materials B1 flame retardant materials B2 combustible materials B3 flammable materials Bureau of Technical Supervision 1997-04-04 1997-10-01 approved the implementation of GB 8624-1997 4 non-combustible type material (A Grade) 4.1 A homogeneous material level By GB/T5464 test, the fuel properties to be achieved: A) the furnace average temperature rise of not more than 50 ; B) the sample continued to burn an average of no more than 20s; C) The average mass loss rate of the sample does not exceed 50%. 4.2 A class of composite (Sandwich) materials Meet the following requirements of the material, its combustion properties as A-level. A) by GB/T8625 testing, each specimen, the average remaining length of 35cm (including any of the specimens The remaining length of> 20cm), and the average gas temperature of each test peak 125 , the sample on the back without any fuel Burning phenomenon; B) by GB/T8627 test, the smoke density rating (SDR) 15; C) by GB/T14402 and GB/T14403 test, its thermal value 4.2MJ/kg, and specimen
GB 8624-1997 standard fireproof materials - refractory - Precision Fasteners - CNC Machining Parts
