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GB/T 40890-2021: General quality requirements and test methods for the teaching vitreous equipment
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GB/T 40890-2021: General quality requirements and test methods for the teaching vitreous equipment

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General quality requirements and test methods for the teaching vitreous equipment ICS 03.180 CCSY51 National Standards of People's Republic of China General quality requirements for glass instruments for teaching And test method Released on 2021-11-26 2021-11-26 implementation State Administration for Market Regulation Issued by the National Standardization Management Committee

Table of contents

Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Geometry, fit and capacity 3 4.1 Wall thickness 3 4.2 Matte 3 4.3 Tightness 4 4.4 Roundness 6 4.5 Straightness 6 4.6 Verticality 7 4.7 Parallelism 7 4.8 Capacity 8 4.9 Conical ground 8 5 Appearance 9 5.1 Requirements 9 5.2 Test method 9 6 Physical and chemical properties 9 6.1 Internal stress 9 6.2 Resistance to internal pressure 10 6.3 Thermal shock 10 6.4 Average linear thermal expansion coefficient 11 6.5 Chemical stability 11 7 Glass material 12 7.1 Requirements 12 7.2 Test method 13 8 Environmental test 13 8.1 Test item 13 8.2 Stacking 13 8.3 Vibration 14 8.4 Free fall (packed state) 15 9 Inspection rules 15 9.1 Inspection classification 15 9.2 Inspection items and inspection methods 15 9.3 Batching rules and sampling methods 16 9.4 Determination of non-conformity 17 9.5 Re-inspection rules 17 10 Signs, labels, packaging, instructions, storage and transportation 17 10.1 Sign 17 10.2 Certificate of conformity 17 10.3 Product Manual 17 10.4 Packaging, transportation and storage 18 Appendix A (normative) grinding mouth size 19 Appendix B (Normative) Minor defects of some glass instruments 22 Reference 31

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed by the Department of Basic Education, Ministry of Education of the People's Republic of China. This document is under the jurisdiction of the National Educational Equipment Standardization Technical Committee (SAC/TC125). This document was drafted by. Zhejiang Education Technology Center, Longchang Lanhui Glass Instrument Factory, Anhui Fuya Glass Technology Co., Ltd., Zhejiang Cai Fu Glass Co., Ltd., Xiamen Ruideli Calibration and Testing Technology Co., Ltd., Jiaxing Educational Equipment and Information Center, Educational Equipment of the Ministry of Education Prepared by the Research and Development Center, China Jiliang University. The main drafters of this document. Ren Weide, Shen Haixiang, Lu Jingao, Sun Zhen, Wang Jufen, Chen Jiangang, Ding Humin, Jiang Weidi, Wang Sen. General quality requirements for glass instruments for teaching And test method

1 Scope

This document specifies the geometrical shape and fit, appearance, physical and chemical properties, material and environmental test requirements and tests of teaching glass instruments Methods, as well as inspection rules, signs, labels, packaging, instructions, storage and transportation. This document applies to laboratory glassware for teaching in primary and secondary schools. Laboratory glass equipment used in universities can be used as a reference. This document does not apply to electric vacuum teaching instruments and optical teaching instruments made of glass.

2 Normative references

The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 1031 Product Geometric Technical Specification (GPS) Surface Structure Profile Method Surface Roughness Parameters and Numerical Values GB/T 2828.1-2012 Sampling inspection procedures by attributes Part 1.Batch inspection sampling searched by acceptance quality limit (AQL) plan GB/T 4546-2008 Test method for internal pressure resistance of glass containers GB/T 4547-2007 Test method for thermal shock resistance and thermal shock durability of glass containers GB/T 4548-1995 The test method and classification of the water erosion resistance of the inner surface of glass containers GB/T 4548.2-2003 Determination and classification of the water erosion resistance of the inner surface of the glass container of glass products by flame spectroscopy GB/T 4892 Rigid Cuboid Transport Packing Size Series GB/T 6579 Laboratory glass instrument thermal shock and thermal shock strength test method GB/T 6580-1997 Test method and classification of corrosion resistance of glass in boiling mixed alkali aqueous solution GB/T 6581-2007 Determination of flame emission or atomic absorption spectrometry for the resistance to hydrochloric acid corrosion of glass at 100℃ GB/T 6582-1997 Particle test method and classification of water resistance of glass at 98℃ GB/T 13868 Sensory Analysis General Guidelines for the Establishment of Sensory Analysis Laboratories GB/T 15726-1995 Internal stress test method for glass instruments GB/T 15728-1995 The weight test method and classification of glass corrosion resistance to boiling hydrochloric acid GB/T 16920-2015 Determination of average linear thermal expansion coefficient of glass GB/T 21297-2007 Laboratory glass instrument interchangeable cone-shaped frosted joints GB 21749-2008 Safety requirements for teaching instruments and equipment, glass instruments and connecting parts GB/T 23470.1 Sensory analysis. General guidelines for sensory analysis laboratory personnel. Part 1.Responsibilities of laboratory personnel GB/T 28209 Chemical analysis method for borosilicate glass GB/T 28211-2011 Laboratory glass instrument filter funnel GB/T 35599-2017 Appearance defect terminology of instrument glass and its products Performance of HG/T 3115 borosilicate glass 3.3 ...