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GB/T 40890-2021General quality requirements and test methods for the teaching vitreous equipment (English PDF)

教学用玻璃仪器一般质量要求和试验方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

November 26, 2021

Implementation date

November 26, 2021

Scope

GB/T 40890-2021 is the English-translated version of 教学用玻璃仪器一般质量要求和试验方法.

GB/T 40890-2021 sets the general quality requirements for the glass instruments used in school laboratories and the tests that check them.

It covers geometry, fit and capacity, with wall thickness, frosting, tightness, roundness, straightness, verticality, parallelism and conical ground joints, then appearance, internal stress, resistance to internal pressure, thermal shock, average linear thermal expansion coefficient and chemical stability, the glass material itself, and environmental tests for stacking, vibration and free fall in the packed state.

It also gives the inspection rules, marking, certificate of conformity, product manual, packaging, transport and storage, with annexes on ground joint sizes and minor defects.

It applies to laboratory glassware for primary and secondary schools, can serve as a reference for universities, and excludes electric vacuum and optical teaching instruments. It was issued on 26 November 2021 and has applied since 26 November 2021.

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Document preview — GB/T 40890-2021

National Standard of the People's Republic of China

ICS: 03.180
Classification: Y 51

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

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

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.

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°C

GB/T 6582-1997 Particle test method and classification of water resistance of glass at 98°C

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

HG/T 3115 Performance of borosilicate glass 3.3

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 31 pages — is available in the English PDF.

Referenced standards

Normative references

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