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GB/T 42387-2023 English PDF (GBT42387-2023)

GB/T 42387-2023 English PDF (GBT42387-2023)

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GB/T 42387-2023: Volumetric glass -- Technical requirements for quality classification

This document specifies the technical requirements for quality classification of volumetric glass and describes the test methods. This document is applicable to the quality classification and test of volumetric glass (burettes, graduated pipettes, one-mark pipettes, one-mark volumetric flasks, measuring cylinders and measuring cups).
GB/T 42387-2023
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 81.040.01
CCS N 64
Volumetric Glass - Technical Requirements for Quality
Classification
ISSUED ON: MARCH 17, 2023
IMPLEMENTED ON: OCTOBER 1, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 5
4 Technical Requirements ... 5
5 Test Methods ... 13
Volumetric Glass - Technical Requirements for Quality
Classification
1 Scope
This document specifies the technical requirements for quality classification of volumetric glass and describes the test methods.
This document is applicable to the quality classification and test of volumetric glass (burettes, graduated pipettes, one-mark pipettes, one-mark volumetric flasks, measuring cylinders and measuring cups).
2 Normative References
The contents of the following documents constitute indispensable clauses of this document through the normative references in this text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 6580 Glass - Resistance to Attack by a Boiling Aqueous Solution of Mixed Alkali - Method of Test and Classification
GB/T 6581 Glass - Resistance to Attack by Hydrochloric Acid at 100 ???C - Flame Emission or Flame Atomic Absorption Spectrometric Method
GB/T 6582 Glass - Hydrolytic Resistance of Glass Grains at 98 ???C - Method of Test and Classification
GB/T 12803 Laboratory Glassware - Conical Graduated
GB/T 12804 Laboratory Glassware - Graduated Measuring Cylinders
GB/T 12805 Laboratory Glassware - Burettes
GB/T 12806 Laboratory Glassware - One-mark Volumetric Flasks
GB/T 12807 Laboratory Glassware - Graduated Pipettes
GB/T 12808 Laboratory Glassware - One-mark Pipettes
GB/T 15726 Glassware - Stress Examination Methods
GB/T 15728 Glass Resistance to Attack by a Boiling Hydrochloric Acid Gravimetric Method of Test and Classification
GB/T 28209 Methods for Chemical Analysis of Borosilicate Glasses
JJG 196 Verification Regulation of Working Glass Container
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 quality classification
Quality classification refers to classification in accordance with the quality and technical requirements of volumetric glass under test.
NOTE 1: volumetric glass includes burettes, graduated pipettes, one-mark pipettes, one-mark volumetric flasks, measuring cylinders and measuring cups.
NOTE 2: the quality and technical requirements include structure type, specifications and dimensions, capacity and accuracy, appearance requirements, physical and chemical properties, etc.
3.2 marking numbers
Marking numbers are marked on the outer surface of the volumetric glass to indicate the metrological figure of the volumetric glass.
4 Technical Requirements
4.1 Burettes
The quality classification requirements for burettes shall comply with the stipulations of Table 1.

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