Valid

JY/T 0437-2011Glass pistons for teaching (English PDF)

Preview PDF

This is a limited preview

Buy now to download the full PDF (5 pages)

Need quotation for your management?

Get a formal quotation for JY/T 0437-2011 in 30 minutes.

Issued by

Ministry of Education of the People's Republic of China

Level / Type

National · Recommended

Issue date

July 11, 2013

Implementation date

July 11, 2013

Scope

JY/T 0437-2011 (Glass pistons for teaching) is available as an English-translated PDF.

JY/T 0437-2011 - This standard specifies the classification and naming of glass pistons, technical requirements, test methods, inspection rules, packaging, transportation, and storage. This standard applies to glass pistons for teaching purposes.

Found what you need?

Document preview — JY/T 0437-2011

National Standard of the People's Republic of China

ICS: 03.180
Classification: Y51

Issued by: Ministry of Education of the People's Republic of China

Foreword
1 Scope
2 Normative references
3 Classification and naming
3.1 Product Classification
3.2 Model Nomenclature
3.3 Model example
4 Requirements
4.1 Materials
4.2 Dimensions
6 Piston height H 28 30 35 37 39 43 47
6.1 Inspection classification
6.2 Inspection items and inspection methods
6.3 Lot rules and sampling methods
6.4 Non-conformance determination
6.5 Review rules
6.6 Quality supervision inspection
7 Marking, packaging, transportation and storage
7.1 Signs
7.2 Packaging, transportation and storage

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

Please note that some elements of this standard may involve patents. The issuer of this standard should not be held responsible for identifying these patents.

This standard was proposed by the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

This standard is under the jurisdiction of the National Technical Committee for Standardization of Teaching Instruments (SAC/TC125).

This standard was drafted. Sichuan Longchang Glass Instrument Factory, Zhejiang Educational Technology Center, Sichuan Ziyang Glass Instrument Factory, Sichuan Scientific industry teaching equipment limited liability company.

1 Scope

This standard specifies the classification and naming of glass pistons, technical requirements, test methods, inspection rules, packaging, transportation, and storage.

This standard applies to glass pistons for teaching purposes.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this document.

For undated references, the latest version (including all amendments) applies to this document.

GB 191-2008 packaging storage and transportation pictogram GB/T 2828.1-2003 Counting sampling acceptance procedure Part 1. Sampling plan for batch inspection for retrieval by acceptance quality limit (AQL) JY 0001-2003 General quality requirements for teaching instruments and equipment products JY 0002 Inspection rules for teaching instruments and equipment products JY 0026-1991 teaching instrument and teaching equipment product model naming method JY/T 0423-2011 General quality requirements and test methods of teaching glass instruments

3 Classification and naming

3.1 Product Classification

According to the shape and quantity of the branch pipe, it is divided into three specifications of straight two-way, curved two-way and T-shaped three-way.

3.2 Model Nomenclature

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

Models of glass valves are named.

L - HS - Z/W/T - 12/H Product specifications (standard grinding mouth code, big end diameter/valve height), unit. mm Product feature code, straight (two-way), curved (two-way), T-shaped (three-way) Product name Pinyin prefix, piston Product model classification code, glass instrument

3.3 Model example

L-HS-Z-12/H. straight two-way piston with standard ground code 12/H

4 Requirements

4.1 Materials

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

4.2 Dimensions

Dimensions and tolerances of straight, curved and T-shaped three-way pistons shall conform to Table 1, and the shapes shall conform to Figure 1, Figure 2, and Figure 3. Should be used Standard ground.

Table 1 Dimensions and tolerances in millimeters

Part name code specifications, sizes and tolerances Piston code d 12/H 14/H 19/H 21/H 24/H 29/H 34/H

1 Big end diameter D 12.5 14.5 18.8 21.5 24 29.2 34.5

2 Core diameter d 2 4 6 8 10 12 15

3 Outer pipe diameter D 1 7 ~ 8 7 ~ 8 9 ~ 10 11 ~ 12 13 ~ 14 16 ~ 17 19 ~ 20 4 branch pipe length L 120 ± 10 120 ± 10 120 ± 10 120 ± 10 120 ± 10 120 ± 10 150 ± 10

5 Elbow length L 1 50 ± 8 50 ± 8 50 ± 8 50 ± 8 50 ± 8 50 ± 8 60 ± 10

6 Piston height H 28 30 35 37 39 43 47

Figure 1 Straight two-way piston

Figure 2 Curved two-way piston

Figure 3 T-shaped three-way piston

4.3 Appearance

4.3.1 Permitted appearance defects. The gas line width should be no more than 0.5mm, the length should be less than 2/3 of the total length of the branch tube, and no more than 3;

The maximum diameter should be no more than 1.5mm and no more than four; the maximum diameter of stones should be no more than 1mm and no more than two;

There should be no more than two air lines and no more than four nodules and stones.

4.3.2 The branch pipe mouth should be melted out.

4.3.3 There should be no appearance defects according to JY/T 0423-2011 Section 5.1.1.

4.4 Adhesiveness

Tightness should meet the first level.

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 180 nm/cm.

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

5 Test method

5.1 The average linear thermal expansion coefficient is tested in accordance with JY/T 0423-2011 No. 6.4.2 and shall comply with the requirements of 4.1 of this standard.

5.2 Dimensions are measured with a vernier caliper with a division value of 0.02 mm and a steel ruler with a division value of 0.5 mm.

begging. The wall thickness shall be tested in accordance with JY/T 0423-2011 Section 4.1.2 and shall meet the requirements of 4.2 of this standard. Length of appearance defects the mirror test shall meet the corresponding requirements of this standard.

5.3 Adhesion test The test according to JY/T 0423-2011 Section 4.3.2 shall meet the requirements of 4.4 of this standard.

5.4 Water resistance, acid resistance and alkali resistance shall be tested in accordance with JY/T 0423-2011 Section 6.5.5 and shall meet the requirements of 4.5 of this standard.

5.5 The internal stress shall be in accordance with JY/T 0423-2011 Section 6.1.2 and shall comply with this standard 4.6.

5.6 The material test shall be in accordance with Article 7.2 of JY/T 0423-2011, shall comply with 4.1 of this standard, and shall be colorless.

5.7 The remaining sensory tests shall meet the corresponding requirements of this standard.

5.8 Environmental test shall be in accordance with JY/T 0423-2011 No. 8 and shall comply with 4.7 of this standard.

6 Inspection rules

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 2.

Table 2 Inspection items, inspection methods and defect classification

No. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Dimension A -

2 appearance requirements and test methods

2.1 Appearance defect B -

2.2 Color C -

2.3 Oral Processing C -

3 Physical and chemical properties and test methods

3.1 Internal stress A -

3.2 Adhesion A -

3.3 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.

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 2.

6.4.2 The criteria for a single sample shall be in accordance with Table 3. B defects and C defects are allowed to coexist.

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, a normal sampling once inspection plan, AQL value. internal stress and tightness 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 Marking, packaging, transportation and storage

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 item" pictogram in accordance with the provisions of GB 191-2008.

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 5 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 2828.1-2003Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection

GB 191-2008

How to Download JY/T 0437-2011

1
Add to cart
Click "Download PDF" on this page and choose "Buy this standard". You can add more standards before checkout.
2
Checkout
Enter your email and billing details. Payment is processed securely by Stripe (cards or bank transfer). Prefer bank details? Request a quotation (min. order $300).
3
Instant delivery (0–9 sec)
Delivery is automatic: within seconds of payment you'll receive an email with a secure download link. The link stays valid for 72 hours.
4
Invoice included
A tax invoice is attached to the confirmation email. Need a custom invoice? Contact us.