JY/T 0438-2011Glass Cylinders for Teaching (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

Please note that some elements of this standard may involve patents. The issuer of this standard should not be held responsible for identifying these patents.

This standard was proposed by the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

This standard is under the jurisdiction of the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

This standard was drafted. Sichuan Longchang Glass Instrument Factory, Zhejiang Educational Technology Center, Sichuan Ziyang Glass Instrument Factory, Sichuan Scientific industry teaching equipment limited liability company.

1 Scope

This standard specifies the classification and nomenclature of gas cylinders, technical requirements, test methods, inspection rules, packaging, transportation, storage, etc.

content.

This standard applies to teaching gas cylinders.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this document.

For undated references, the latest version (including all amendments) applies to this document.

GB 191-2008 packaging storage and transportation pictogram GB/T 2828.1-2003 Counting sampling acceptance procedure Part 1. Sampling plan for batch inspection for retrieval by acceptance quality limit (AQL) JY 0001-2003 General quality requirements for teaching instruments and equipment products JY 0002 Inspection rules for teaching instruments and equipment products JY 0026-1991 teaching instrument and teaching equipment product model naming method JY/T 0423-2011 General quality requirements and test methods of teaching glass instruments

3 Classification and naming

4 Requirements

6 Iron filings <=1 <=2 <=1 <=2

7 Necking depth <= 4-necking depth <= 5-

8 Shoulder collapse depth <=3-Shoulder collapse depth <=4-

9 4 single stripes, 6 not concentrated, not concentrated Note. "-" means not required.

4.3.2 The appearance defects that should not exist shall be in accordance with JY/T 0423-2011 Section 5.1.1.

4.3.3 The uniformity of wall thickness shall comply with JY/T 0423-2011 Section 4.1.1.2.

4.3.4 The frosted surface shall cover the end surface of the bottle mouth and the cover plate evenly, and the frosted surface shall not have light spots. The four corners of the cover should be chamfered, and the four sides should be polished.

There should be quick mouth.

4.4 Adhesiveness

The tightness between the cover plate and the bottle mouth should meet the following requirements. After the cover plate and the bottle mouth are fully wet and closed, the bottle body cover is kept on the bottle mouth for 30 seconds without falling off.

4.5 Chemical stability it should meet the water resistance HGB level 1, acid resistance H1 level, and alkali resistance A2 level.

4.6 Internal stress

The internal stress should not be greater than 180 nm/cm.

4.7 Environmental test the environmental test shall be in accordance with Chapter 8 of JY/T 0423-2011.

5 Test method

5.1 Dimensions are measured with a vernier caliper with a division value of 0.02mm and a steel ruler with a division value of 0.5mm, which shall meet the requirements of 4.2 of this standard.

begging. The length of the appearance defect shall be tested with a reading microscope and shall meet the corresponding requirements of this standard.

5.2 The wall thickness and uniformity shall be in accordance with JY/T 0423-2011 Section 4.1.2. The test shall meet the requirements of 4.2 and 4.3.3 of this standard.

5.3 Adhesion test. After the cover and the mouth of the bottle are fully wet and closed, the bottle body cover is kept on the mouth of the bottle for 30 seconds without falling off.

5.4 Water resistance, acid resistance, and alkali resistance Test according to JY/T 0423-2011 Section 6.5.2, shall meet the requirements of 4.5 of this standard.

5.5 The internal stress shall be in accordance with JY/T 0423-2011 Section 6.1.2 and shall comply with this standard 4.6.

5.6 The material test shall be in accordance with Section 7.2 of JY/T 0423-2011, which shall comply with 4.1 of this standard, and shall not have obvious yellow-green.

5.7 The remaining sensory tests shall meet the corresponding requirements of this standard.

5.8 The environmental test shall be in accordance with Chapter 8 of JY/T 0423-2011 and shall comply with 4.7 of this standard.

6 Inspection rules

6.1 Inspection classification the inspection of this product is divided into factory inspection, type test and quality supervision inspection.

6.2 Inspection items and inspection methods the inspection items and inspection methods of this product shall conform to Table 3.

Table 3 Inspection items, inspection methods and defect classification

6.3 Lot rules and sampling methods no. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Dimension A -

1.2 Wall thickness B -

1.3 Frosting Requirements A -

1.6 Adhesion A -

2 appearance requirements

2.1 Appearance defect B -

2.2 Color C -

2.3 Oral Processing C -

2.4 Bottom B -

3 Physical and chemical properties

3.1 Internal stress A -

3.3 Chemical stability B--

4 Material A--

5 Environmental test

5.1 Stacking Code B--

5.2 Vibration A--

5.3 Free fall A--

Note. "-" in the table means full inspection for batch products, "-" means sample inspection for batch products, and "-" means no inspection.

6.3.1 The factory inspection shall be based on the natural batch of delivery, and the type inspection shall be based on the inventory array.

6.3.2 When leaving the factory, all the inspection items should be inspected first, and then samples should be taken from the qualified products of all inspection items.

test.

6.3.3 The samples for type inspection shall be taken from the products that passed the factory inspection.

6.3.4 The sampling methods for factory inspection and type inspection shall be in accordance with GB/T 2828.1-2003, with a normal sampling once inspection plan and inspection level.

For General II.

6.4 Non-conformance determination

6.4.1 The classification of defects A, B and C shall conform to Table 3.

6.4.2 The criteria for a single sample shall be in accordance with Table 4.

Table 4 Single item judgment rules

Classification A defect B defect C defect Pass 0 <= 2 <= 4 Unqualified >=1 > 2 > 4

6.4.3 The quality of the inspection lot shall be determined in accordance with GB/T 2828.1-2003, with a normal sampling and one inspection plan.

The overall dimensions are 6.5, and the rest are 2.5.

6.5 Review rules

The re-inspection shall implement the transfer rules in accordance with GB/T 2828.1-2003.

6.6 Quality supervision inspection Press JY 0002.

7 Marking, packaging, transportation and storage

7.1 Signs

Should comply with the provisions of Chapter 11 of JY 0001-2003.

7.2 Packaging, transportation and storage

7.2.1 It shall comply with the provisions of Chapter 12 of JY 0001-2003.

7.2.2 The products shall be separated by earthquake-resistant packaging materials and fixed in the packing box.

7.2.3 The outer packaging box shall be provided with a "fragile item" pictogram in accordance with the provisions of GB 191-2008.