JY/T 0427-2011Glass instrument tee connecting pipe for teaching (T-shaped pipe, Y-shaped pipe, U-shaped pipe) (English PDF)

3.1 Product Classification

Divided into phi7mm ~ phi8mm, phi10mm ~ phi11mm, phi15mm ~ phi16mm according to outer diameter, and divided into T-shaped tube and Y-shaped according to shape Tube, U-shaped tube.

3.2 Model designation

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

The model of the three-way connecting pipe is named.

L - LJG - T/Y/U - 7/10/15 Product specifications, unit. mm Product feature code, T, Y, U shape Product name Pinyin prefix, connecting pipe Product model classification code, glass instrument Model example.

LLT-7. T-shaped connecting pipe with an outer diameter of phi7mm ~ phi8mm.

4.1 Materials

It should be made of colorless transparent borosilicate glass. The average linear thermal expansion coefficient should be less than 4.0 x 10-6K-1.

4.2 Dimensions

The external dimensions and tolerances of the tees of various specifications shall conform to Table 1 and Figures 1, 2, and 3.

Table 1 Dimensions and tolerances in millimeters

Serial number part name code Dimensions and tolerances phi7mm ~ phi8mm phi10mm ~ phi11mm phi15mm ~ phi16mm

1 Diameter D 7 ~ 8 10 ~ 11 15 ~ 16 2 pipe length l 1 50 ± 5 60 ± 5 75 ± 5

3 Full length L 100 ± 10 120 ± 10 150 ± 12

4 U-shaped tube distance l 2 20 ± 5 26 ± 5 30 ± 5

5 U-shaped tube radius R 10 13 15

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 comply with Table 2.

Table 2 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 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 Processing C -

3 Physical and chemical properties

3.1 Internal stress A -

3.2 Chemical stability B--

4 Material A--

Table 2 Inspection items and inspection methods for defect classification, factory inspection and type inspection (continued)

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 2.

6.4.2 The criteria for a single sample shall be in accordance with Table 3.

Table 3 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.

No. Inspection Content Defect Classification Factory Inspection Type Inspection

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.

7.2 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.