JY/T 0440-2011Glassware for teaching (English PDF)

3.1 Product Classification

Divided into 60mm, 80mm, 100mm, 125mm four specifications according to the outer diameter.

3.2 Model designation

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

The model of crystallizing dish is named.

L - JJM - Y - 60

Product specifications (outer diameter), unit. mm Product feature code, round Product name Pinyin prefix, crystal dish Product model classification code, glass instrument Model example.

L-JJM-Y-60. round crystal dish with a specification of phi 60mm.

5.1 Materials

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

5.2 Dimensions

The external dimensions and tolerances of the crystallizers of various specifications shall conform to Table 1 and Figure 1.

Table 1 Specifications, dimensions and tolerances are in millimeters

Part name code

Specifications, dimensions and tolerances 60 90 120 150 Outside diameter D 60 ± 1.5 90 ± 2 120 ± 2 150 ± 2 Height H 30 ± 2 45 ± 3 60 ± 3 75 ± 3 Thickness S 1.2 ~ 2 1.2 ~ 2 1.2 ~ 2 1.2 ~ 2

Figure 1 Crystallization dish

5.3 Appearance

5.3.1 The appearance defects allowed in the crystallizer should conform to Table 2.

Table 2 Permitted appearance defects

specification

Bubble nodules stones, bubbles, nodules, stone Allowed total dispersion stripe Maximum diameter mm Quantity Maximum diameter mm Quantity Maximum diameter mm Quantity 60mm ~ 80mm <=2 <=3 <=1 <=3 <=1 1 <=5 pieces <=2 pieces 100mm ~ 125mm <=3 <=4 <=1.5 <=4 <=1 2 <=6 pieces <=3 pieces

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

5.3.3 The melting depth of the edge of the dish should not be greater than 3mm, and the stockpile should not be greater than twice the wall thickness.

5.3.4 Oral treatment should comply with JY/T 0423-2011 Section 5.3.

5.3.5 The thickness-to-thickness ratio shall not be greater than 2. 1.

5.4 Internal stress

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

5.8 Chemical stability

Should meet water resistance HGB level 1, acid resistance H1 level, alkali resistance A2 level.

5.9 Thermal shock

The thermal shock resistance (quenching temperature difference) should not be lower than 180 ° C.

5.10 Environmental test

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

7.1 Inspection classification

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

7.2 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

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

2.1 Appearance defect B -

2.2 Color C -

2.3 Oral treatment B -

2.4 Bottom A -

3 Physical and chemical properties

3.1 Internal stress A -

3.2 Thermal shock A -

3.3 Average linear thermal expansion coefficient B--

3.4 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.

7.3 Lot rules and sampling methods

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

7.3.2 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.

test.

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

7.3.4 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. The inspection level is General II.

7.4 Non-conformance determination

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

7.4.2 The criteria for a single sample shall be in accordance with Table 4. Defects B and C in the table are allowed to coexist.

Table 4 Single item judgment rules

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

7.4.3 The quality of the inspection lot shall be determined in accordance with GB/T 2828.1-2003, a normal sampling once inspection plan, AQL value. internal stress and thermal shock Take 1.5 for performance, 6.5 for external dimensions, and 2.5 for the rest.

7.5 Review rules

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

7.6 Quality supervision inspection

Press JY 0002.

8.1 Logo

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

8.2 Packaging, transportation and storage

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

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

8.2.3 The outer packaging box shall be provided with the "fragile items" pictogram in accordance with GB 191-2008.