JY/T 0432-2011Glass instrument suction tube for teaching (English PDF)

3.1 Model Nomenclature

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

3.2 Model Nomenclature

The model of the exhaust pipe is named.

L - CQG - F - 350

Product specifications, unit. mm Product feature code with check valve Product name Pinyin prefix, exhaust pipe Product model classification code, glass instrument Model example.

L-CQG-F-350. 350 mm length suction pipe with check valve.

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 external dimensions and tolerances of the suction pipe shall conform to Figure 1.

Figure 1 Suction tube

4.3 Appearance

4.3.1 Permissible appearance defects. the maximum diameter of the nodules should be no more than 1mm and no more than 3; the maximum diameter of the stones should be no more than 0.5mm.

1; total allowed should not be more than 3.

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 inner and outer pipes of the suction pipe shall be on the same axis, and the nozzle of the inner pipe is aligned with the lower nozzle.

4.3.4 The inner pipe mouth is ground flat, and there should be no oblique mouth and notch. The frosted float valve in the branch pipe should be flexible to prevent the gas from flowing out. Test method According to Article 5.3.

4.4 Uniformity of wall thickness

The uniformity of the wall thickness shall be in accordance with JY/T 0423-2011 Section 4.1.1.2.

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 greater than 180nm/cm.

4.7 Extraction ultimate vacuum

The ultimate vacuum degree of extraction is not more than 1kPa.

4.8 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 for factory inspection and type inspection shall conform to Table 1.

Table 1 Inspection items and inspection methods for defect classification, factory inspection and type inspection

No. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Dimension A -

1.2 Wall thickness (including uniformity) B -2 appearance requirements

2.1 Appearance defect B -

2.2 Color C -

Oral treatment (external and internal suction tubes should be in the same Axis, the inner nozzle is aligned with the lower nozzle.) -

3 Physical and chemical properties

3.1 Internal stress A -

3.2 Chemical stability B--

4 Ultimate Vacuum A -

Table 1 Inspection items and inspection methods (continued)

No. Inspection Content Defect Classification Factory Inspection Type Inspection

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, 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 2.

Table 2 Single sample determination 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, a normal sampling once inspection plan, AQL value. internal stress and ultimate vacuum Take 1.5, take the external dimensions 6.5, and take the rest 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.