GB/T 9900-2025Rubber- or plastics-coated fabrics — Ventilation ducting (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents". Drafting.

This document replaces GB/T 9900-2008 "Rubber or Plastic Coated Fabric Air Ducts". Compared with GB/T 9900-2008, it has the following differences.

Aside from structural adjustments and editorial changes, the main technical changes are as follows.

a) The classification rules have been changed (see 4.1, Chapter 3 of the 2008 edition), and the schematic diagram of the air duct structure has been changed (see Figures 1 and 2).

The 2008 edition of Figures 1 and 2 added a model designation method (see 4.3);

b) The physical and mechanical property requirements for coated fabrics have been changed (see 5.1.2, 2008 version 5.1.2);

c) The flame retardant performance requirements for coated fabrics have been changed (see 5.1.3, 5.1.2 of the 2008 edition) and the flame retardant performance test methods (see 6.1.3,...). (2008 version 6.6)

d) Requirements for positive pressure air ducts with nominal diameters of 1800mm and.2000mm have been added (see 5.2);

e) A new connector material has been added, namely the zipper (see 5.2.4.2.2);

f) The requirement for end ring deformation has been removed (see 5.2.4.1 in the 2008 version);

g) A test method for the flame retardant properties of coated fabrics has been added (see Appendix A);

h) The test principle in Appendix B, Test Method for Conductivity of Coated Fabrics (see A.1 in the 2008 edition), has been deleted, as has the electrode material section.

The quantity specifications (see A.2.2 of the 2008 edition) have been revised, and the schematic diagram of the electrodes has been changed (see Figure B.1, Figure A.1 of the 2008 edition).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed by the China Petroleum and Chemical Industry Federation.

This document is under the jurisdiction of the National Technical Committee on Standardization of Rubber and Rubber Products (SAC/TC35).

This document was drafted by: China Coal Technology & Engineering Group Chongqing Research Institute Co., Ltd., Chongqing Safety Standard Testing & Research Institute Co., Ltd., and Huainan Dongchen Rubber Co., Ltd.

Plastics Limited Liability Company, Jinan Lulian Group Rubber Products Co., Ltd., Shaoxing Plastics Ventilation Equipment Co., Ltd., Shenyang Rubber Research and Design Institute Chengdu Institute Co., Ltd., Chengdu Vision Composite Materials Co., Ltd., and Chengdu Zhongcheng New Composite Materials Co., Ltd.

The main drafters of this document are: Wang Fanshu, Li Shaohui, Kong Linggang, Zhou Zhipeng, Ju Guanggang, Yang Huayun, He Hongjun, Qu Shuyang, Qian Feng, and Li Sa.

Yuan Ye, Zhang Quan, Li Pan, Wang Wei, Lian Bo, Lu Ning, Kang Xiaotian.

The release history of this document and the document it replaces is as follows.

— First published in 1988 as GB/T 9900-1988, and revised for the first time in 2008;

— This is the second revision.

1 Scope

This document specifies the classification, structure and materials, specifications, requirements, inspection rules, marking, and packaging of rubber or plastic coated fabric air ducts.

The loading, transportation, and storage of the equipment are described, along with the corresponding testing methods.

This document applies to local ventilation applications in mines, tunnels, water conservancy projects, subways, and civil defense projects, using rubber or plastic-coated fabrics.

The positive and negative pressure air ducts are manufactured.

2 Normative references

GB/T 338

GB/T 394.1

GB/T 1222

GB/T 3078

GB/T 10111

GB/T 15335

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined.

4 Classification, structure and materials, specifications and models

5 Requirements

1 Warp and weft tensile strength (kN/m). >=26, >=34, >=40

2 Tear strength in the warp and weft directions/N >=100 >=200 >=300

3 Coating adhesion strength (N/m). >=500 >=700 >=1000

1 Flaming combustion time <=10 <=3 <=12 <=6

2 Flameless combustion time <=30 <=10 <=60 <=20