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JY/T 0439-2011Glass instruments for teaching should be taken over (tailed over) (English PDF)

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Issued by

Ministry of Education of the People's Republic of China

Level / Type

National · Recommended

Issue date

July 11, 2013

Implementation date

July 11, 2013

Scope

JY/T 0439-2011 (Glass instruments for teaching should be taken over (tailed over)) is available as an English-translated PDF.

JY/T 0439-2011 - This standard specifies the classification and naming, technical requirements, test methods, inspection rules, packaging, transportation, storage and other contents that should be taken over. This standard applies to should take over.

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Document preview — JY/T 0439-2011

National Standard of the People's Republic of China

ICS: 03.180
Classification: Y51

Issued by: Ministry of Education of the People's Republic of China

Foreword
1 Scope
2 Normative references
3 Classification and naming
3.1 Product Classification
3.2 Model designation
4 Requirements
4.1 Materials
4.2 Dimensions
5 Wall thickness S 1.5 ± 0.5 1.5 ± 0.5 2 ± 0.5 2 ± 0.5
6 Inspection rules
6.1 Inspection classification
6.2 Inspection items and inspection methods
6.3 Lot rules and sampling methods
6.4 Non-conformance determination
6.5 Review rules
6.6 Quality supervision inspection
7 Marking, packaging, transportation and storage
7.1 Signs
7.2 Packaging, transportation and storage

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 naming, technical requirements, test methods, inspection rules, packaging, transportation, storage and other contents that should be taken over.

This standard applies to should take over.

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

3.1 Product Classification

According to different dimensions, it is divided into four specifications. phi15mm x 150mm, phi18mm x 150mm, phi25mm x 180mm, phi30mm x.200mm.

3.2 Model designation

The model name of the product is in accordance with JY 0026-1991.

The models to be taken over are named.

L - YJG - W - 15 x 150 Product specifications (), unit. mm Product feature code, curved Product name Pinyin prefix, should take over Product model classification code, glass instrument Model example.

L-YJG-W-15 x 150. The curved shape with dimensions of phi 15mm x 150mm should take over.

4 Requirements

4.1 Materials

It should be made of colorless transparent borosilicate glass. The average linear thermal expansion coefficient is not more than 4.0 x 10-6K-1.

4.2 Dimensions

The dimensions and tolerances of various specifications to be taken over shall conform to Table 1 and Figure 1.

Table 1 The specifications should take over the specifications, dimensions and tolerance units in millimeters

Part name

Specifications, sizes and tolerances phi 15 x 150 phi 18 x 150 phi 25 x 1800 phi 30 x.200

1 Straight tube length L 1 75 ± 10 80 ± 10 100 ± 10 110 ± 10

2 Conical tube length L 2 75 ± 10 70 ± 10 80 ± 10 90 ± 10

3 Straight pipe diameter D 15 ± 2 18 ± 2 25 ± 2 30 ± 2

4 Conical nozzle diameter D 1 8 ± 2 9 ± 2 10 ± 2 15 ± 3

5 Wall thickness S 1.5 ± 0.5 1.5 ± 0.5 2 ± 0.5 2 ± 0.5

Figure 1 Bend should take over

4.3 Appearance

4.3.1 Permitted appearance defects. gas line width of 0.5mm, non-concentrated, length less than 1/2 of the length of branch pipe, no more than 5;

There should be no more than 2 lines; the maximum diameter of the nodules should be no more than 2mm and no more than 5; the maximum stone diameter should be less than 1.5mm and no more than 4 each. Permissible total number of appearance defects. no more than 6 air lines and single stripes, no more than 7 nodules and stones.

4.3.2 The appearance defects that should not exist shall be in accordance with 4.1.1.2 of JY/T 0423-2011.

4.3.3 Straight nozzles shall be smooth and smooth, tapered nozzles shall be smooth and there shall be no quick openings.

4.4 Internal stress

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

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

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

5 Test method

5.1 The average linear thermal expansion coefficient shall be in accordance with JY/T 0423-2011 Section 6.4.2. The test shall meet the requirements of Article 4.1 of this standard.

5.2 Dimensions are measured with a vernier caliper with a division value of 0.02 mm and a steel ruler with a division value of 0.5 mm, 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.

5.3 Wall thickness shall be in accordance with JY/T 0423-2011 Section 4.1.2 and shall comply with 4.2 of this standard.

5.4 The internal stress shall be in accordance with Article 6.1.2 of JY/T 0423-2011 and shall comply with 4.4 of this standard.

5.5 Water resistance, acid resistance, and alkali resistance are tested according to JY/T 0423-2011 Section 6.5.2, which shall meet the requirements of 4.6 of this standard.

5.6 The material test shall be in accordance with Article 7.2 of JY/T 0423-2011, shall comply with 4.1 of this standard, and shall not be colored.

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 this standard 4.6.

6 Inspection rules

6.1 Inspection classification

The inspection of this product is divided into factory inspection and type test.

6.2 Inspection items and inspection methods

The inspection items and inspection methods of this product shall conform to Table 2.

Table 2 Inspection items, inspection methods and defect classification

No. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Dimension A -

1.2 Wall thickness B -2 appearance requirements and test methods

2.1 Appearance defect B -

2.2 Color C -

2.3 Oral Processing C -

3 Physical and chemical properties and test methods

3.1 Internal stress A -

3.2 Average linear thermal expansion coefficient B--

3.3 Chemical stability B--

4 Material A--

Table 2 Inspection items, inspection methods and defect classification (continued)

6.3 Lot rules and sampling methods

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, and the inspection plan shall be a normal sampling once. The inspection level is General II.

6.4 Non-conformance determination

6.4.1 The classification of defects A, B and C shall conform to Table 2.

6.4.2 The criteria for a single sample shall be in accordance with Table 3.

Table 3 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

Should 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

No. Inspection Content Defect Classification Factory Inspection Type Inspection

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.

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.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 5 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2828.1-2003Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

GB 191-2008

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