JY/T 0451-2011Teaching glass instrument glass evaporation dish (English PDF)

3.1 Product Classification

According to the outer diameter, it is divided into 60mm, 90mm, 120mm, and 150mm specifications. According to the shape of the bottom, it is divided into flat-bottomed evaporator and round-bottomed evaporator.

3.2 Model designation

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

The model of the evaporation dish is named.

L - ZFM - P/Y - 60

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

L-ZFM-Y-60. Round bottom evaporation dish with outer diameter of phi60mm

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 overall dimensions and tolerances of the various types of evaporation pans should conform to Table 1, and the dimensions are shown in Figures 1 and 2.

Table 1 Dimensions and tolerances in millimeters

Dimensions Dish mouth diameter D Dish bottom diameter D1 Dish height H Wall thickness S 60 60 ± 3 30 ± 3 30 ± 3 > 1 90 90 ± 3.5 45 ± 3 45 ± 3 > 1 120 120 ± 4.5 60 ± 3 60 ± 5 > 1.2 150 150 ± 5 75 ± 3 75 ± 5 > 1.2

Figure 1 Round bottom evaporation dish

Figure 2 Flat bottom evaporation dish

5.3 Appearance

5.3.1 The appearance defects allowed in the evaporating dish shall conform to Table 2.

Table 2 Permitted appearance defects

Defect name

60mm, 90mm, 120mm, 150mm Maximum diameter mm Quantity Maximum diameter mm Quantity Bubbles <=3 <=2 <=4 <=2 Nodule <=1.5 <=2 <=2 <=2 Stone <= 0.8 1 <= 1 1 Total number of air bubbles, nodules, and stones allowed <= 3 Total number of air bubbles, nodules, and stones allowed <= 4 Single stripes <=3, should not be concentrated <=4, should not be concentrated

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 gap at the edge of the evaporation 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 wall thickness ratio is not greater than 2. 1.

5.4 Internal stress

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

5.5 Chemical stability

Should meet water resistance HGB level 1, acid resistance level 1, alkali resistance level 2.

5.6 Thermal shock

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

5.7 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 for factory inspection and type inspection shall comply with Table 3.

Table 3 Inspection items and inspection methods for defect classification, factory inspection, type inspection

No. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Dimensions (except wall thickness) 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 batch of delivery, 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 sample determination 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, thermal shock resistance the average linear thermal expansion coefficient is 1.5, the external dimensions are 6.5, and the rest are 2.5.

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 a "fragile item" pictogram in accordance with GB 191-2008.