JY/T 0435-2011Nitrogen dioxide ball (English PDF)

3.1 Product Classification

Divided into single ball and double ball according to structure.

3.2 Model designation

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

The model of nitrogen dioxide ball is named.

L - NO2Q - D/S - 48 x 90 Product specifications (dimensions), unit. mm Product feature code, single ball, double ball Product name Pinyin prefix, nitrogen dioxide ball Product model classification code, glass instrument Model example.

L-NO2Q-S-50 x 180. Double-sphere nitrogen dioxide ball with dimensions of 50mm x 180mm.

4.1 Materials

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

4.2 Dimensions

The shape of the nitrogen dioxide ball should conform to Figures 1 and 2, and the dimensions should not be smaller than those shown in Figures 1 and 2.

Note. The dimensions in the figure are for reference only.

Figure 1 Single-sphere nitrogen dioxide ball

Note. The dimensions in the figure are for reference only.

Figure 2 Double-ball type nitrogen dioxide ball

4.3 Appearance

4.3.1 Appearance defects allowed. gas line width is not greater than 0.5mm, 2 are not concentrated; single stripe is not concentrated 2; the largest diameter of nodules 1mm, no more than 3; the maximum diameter of stones is not more than 1mm, no more than 3; the total number of appearance defects allowed. gas lines, 3 single stripes 4 nodules and stones.

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 ball wall shall be uniform in thickness and the thickness ratio shall not be greater than 3. 2.

4.3.4 The double spheres shall be parallel. The parallelism error should not be greater than 5mm.

4.3.5 The connection between the ball and the branch pipe and the sealing shall be smooth and firm, and shall not be skewed or have sharp corners to fasten.

4.4 Inflating the ball

The ball should be sealed with NO2 gas, which is yellow-brown at room temperature, and the experimental effect should meet 5.7.

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 less than 180nm/cm.

4.7 Environmental test

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

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 1.

Table 1 Inspection items, inspection methods and defect classification

No. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Dimension B -

1.2 Wall thickness B -2 appearance requirements

2.1 Appearance defect B -

2.2 Color C -

2.3 Oral Processing C -

3 Physical and chemical properties

3.1 Internal stress A -

3.3 Chemical stability B--

4 Experimental effect A -

5 Material A--

6 Environmental test

6.1 Stacking B--

6.2 Vibration A--

6.3 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 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, 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 1.

6.4.2 The criteria for a single sample shall be in accordance with Table 2.

Table 2 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.

7.1 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 article" pictogram in accordance with GB 191-2008.