JY/T 0426-2011Glass instrument gas generator 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 generators, technical requirements, test methods, inspection rules, packaging, transportation, storage, etc.

Content.

This standard applies to teaching gas generators.

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

12 Full height H 238 ± 10 306 ± 15 360 ± 17 448 ± 23 530 ± 25

4.2.2 The distance between the funnel handle and the inner wall of the bottle mouth should be no more than 2mm (single side).

4.3 Appearance

4.3.1 The permitted appearance defects shall meet the requirements of Tables 2 and 3, and necking and shoulder collapse defects shall not be obvious, and there shall be no obvious neck distortion.

Table 2 Permitted appearance defects

Serial number

defect

name

Part

125mL 250mL 500mL 1000mL.2000mL Maximum diameter mm Quantity Maximum diameter mm Quantity Maximum diameter mm Quantity Maximum diameter mm Quantity Maximum diameter mm Quantity 1 bubble Bucket <=5 <=2 <=5 <=2 <=6 <=2 <=8 <=2 <=10 <=2 Sphere <=5 <=3 <=5 <=4 <=6 <=4 <=8 <=4 <=10 <=4 2 nodules Bucket <=2 <=2 <=3 <=2 <=3 <=3 <=3 <=4 <=3 <=5 Sphere <=2 <=3 <=3 <=3 <=3 <=4 <=3 <=5 <=3 <=7

3 Stones

Bucket <=2 <=1 <=2 <=1 <=2 <=2 <=2 <=3 <=3 <=3 Sphere <=2 <=2 <=2 <=2 <=2 <=3 <=2 <=5 <=3 <=5

Table 3 Permissible appearance defects

Defect site

125mL 250mL 500mL 1000mL.2000mL Quantity Quantity Quantity Quantity Quantity Air bubbles, nodules, Stone Allowed Total Bucket <=4 <=4 <=6 <=6 <=7 Sphere <=6 <=8 <=9 <=12 <=13

Figure 1 Gas generator

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 Frosted surface. The frosted surface of the connection port and hemispherical port should be uniform and delicate. The width of the light spots and coarse sand marks is less than 4mm, and the length is less than 1/3 of the plug height.

Only two are allowed, and it is not allowed to concentrate in the middle and lower part of the mouth.

4.3.4 The uniformity of wall thickness shall be in accordance with JY/T 0423-2011 Section 4.1.1.

4.3.5 The verticality shall be in accordance with JY/T 0423-2011 Section 4.6.1.

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

4.5 Internal stress

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

4.6 Adhesiveness

Should meet the second level of tightness.

4.7 Pressure resistance should withstand the pressure of 0.4MPa, the pressure difference of 5min will not be destroyed.

4.8 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 of 0.02 mm and a steel ruler with a graduation value of 0.5 mm, which shall meet the requirements of 4.2 of this standard.

5.2 Wall thickness and uniformity shall be tested in accordance with JY/T 0423-2011 Section 4.1.2, and shall meet the requirements of 4.2 and 4.3.3 of this standard. Appearance defect the medium-length measurement with a reading microscope should meet the corresponding requirements of this standard.

5.3 Frosted mouth test shall be in accordance with JY/T 0423-2011 Section 4.2.1, which shall comply with Section 4.3.3 of this standard.

5.4 The verticality shall be tested according to JY/T 0423-2011 No. 4.6.2 and shall meet the requirements of 4.3.5 of this standard.

5.5 Water resistance, acid resistance and alkali resistance JY/T 0423-2011 Section 6.5.2 shall meet the requirements of 4.4 of this standard.

5.6 The internal stress shall be in accordance with JY/T 0423-2011 Section 6.1.2 and shall comply with 4.5 of this standard.

5.7 Adhesion test According to JY/T 0423-2011 Section 4.3.2 test, it should meet the requirements of 4.6 of this standard.

5.8 Pressure resistance test according to JY/T 0423-2011 No. 6.2.2, should meet the requirements of 4.7 of this standard.

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

5.10 The other sensory tests shall meet the corresponding requirements of this standard.

5.11 The environmental test shall be in accordance with Chapter 8 of JY/T 0423-2011 and shall comply with 4.8 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 should conform to Table 4.

Table 4 Inspection items and inspection methods

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

Check.

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 3.

6.4.2 The criteria for a single sample shall be in accordance with Table 5.

No. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Wall thickness B -

1.2 Frosting Requirements A -

1.3 Grinding size A -

1.4 Verticality B -

1.5 Air tightness 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 -

3.2 Pressure resistance A -

3.5 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.

Table 5 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.