JY/T 0425-2011 English PDF

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JY/T 0425-2011: (Teaching glass instruments)
Status: Valid

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JY/T 0425-2011	199	Add to Cart	3 days	(Teaching glass instruments)	Valid

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Basic data

Standard ID: JY/T 0425-2011 (JY/T0425-2011)
Description (Translated English): (Teaching glass instruments)
Sector / Industry: Education Industry Standard (Recommended)
Classification of Chinese Standard: Y51
Word Count Estimation: 8,833
Date of Issue: 2013-07-11
Date of Implementation: 2013-07-11
Issuing agency(ies): Ministry of Education of the People's Republic of China

JY/T 0425-2011: (Teaching glass instruments)

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
(Teaching glass instruments) ICS 03.180 Y 51 Record number 46863-2014 Education Industry Standard of the People's Republic of China Teaching glass instruments Teaching glassware-Bell jars 2013–07–11 Release 2013–07–11 Implementation Published by the Ministry of Education of the People's Republic of China JY

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. The main drafters of this standard. Lu Jingao, Sun Rui, Ren Weide, Zheng Luosan, Fan Xianfen, Wang Qin. Teaching glass instruments

1 Scope

This standard specifies the classification and naming of glass bell jars, technical requirements, test methods, inspection rules, packaging, transportation, and storage. This standard applies to glass bell jars for teaching.

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 Divided by size. φ120mm × 180mm, φ150mm × 250mm, φ180mm × 250mm, φ200mm × 300mm, φ250mm × 400mm Five kinds of specifications, according to the structure are divided into three specifications with plug, with mouth, with knot. 3.2 Model designation The model name of the product is in accordance with the provisions of JY 0026-91. The model of the glass bell cover is named. L ― ZZ ― S/K/J ― 120 × 180 Product specifications (dimensions), unit. mm Product feature code, plug, mouth, knot Product name Pinyin prefix, bell cover Product model classification code, glass instrument Model example. L-ZZ-J-180 × 250. Represents a knotted glass bell jar with a size of φ 180mm × 250mm.

4 Requirements

4.1 Materials It should be made of transparent soda lime glass without obvious yellow-green. 4.2 Dimensions The external dimensions and tolerances of the bell jar should conform to Table 1 and Figure 1. The external dimensions and tolerances of the bell jar should conform to Table 2 and Figure 2. With In addition to the mouthpiece without a plug, and does not need to grind the mouth, the rest have the same bell cover. Table 1 Dimensions and tolerances of the bell jar Table 1 Dimensions and tolerances of bell jars in millimeters Part name symbol Structured 120 × 180 150 × 250 180 × 250.200 × 300 250 × 400 Full height H 220 ± 10 300 ± 10 300 ± 10 300 ± 12 460 ± 12 Height h 180 ± 5 250 ± 5 250 ± 5 300 ± 8 400 ± 8 Inner diameter d 120 ± 3 150 ± 3 180 ± 3.200 ± 5 250 ± 5 Wall thickness S ≥3 ≥3 ≥3 ≥3 ≥3 Caliber d 1----- Edge outer diameter (reference) d 2 144 180 216 220 300 Part name symbol With plug 120 × 180 150 × 250 180 × 250.200 × 300 250 × 400 H 210 ± 5 280 ± 10 280 ± 10 340 ± 12 450 ± 12 Height h 180 ± 5 250 ± 5 250 ± 5 300 ± 8 400 ± 8 Inner diameter d 120 ± 3 150 ± 3 180 ± 3.200 ± 5 250 ± 5 Wall thickness S ≥3 ≥3 ≥3 ≥3 ≥3 Port diameter d 1 34 ± 3 34 ± 3 34 ± 3 40 ± 3 40 ± 3 Edge outer diameter (reference) d 2 144 180 216 220 300 Figure 1 Bell jar with plug Figure 2 Bell jar with knot 4.3 Appearance 4.3.1 The allowed appearance defects shall meet the requirements of Table 2. Table 2 Permitted appearance defect unit. mm Defect name specification 120mm × 180mm 150mm × 250mm 180mm ×.200mm.200mm × 300mm 250mm × 400mm Maximum diameter mm Quantity Maximum diameter mm Quantity Maximum diameter mm Quantity Maximum diameter mm Quantity Maximum diameter mm Quantity bubble 4 × 8 ≤3 8 × 15 ≤3 5 × 15 ≤2 10 × 20 ≤2 10 × 25 ≤2 2 × 6 ≤4 3 × 12 ≤4 3 × 14 ≤4 6 × 15 ≤2 8 × 15 ≤5 Transparent 疙瘩 ≤3 ≤2 ≤4 ≤2 ≤5 ≤2 ≤6 ≤2 ≤6 ≤2 Grit ≤1 ≤2 ≤3 ≤2 ≤3 ≤2 ≤4 ≤2 ≤4 ≤2 Bubble, transparent 、 Grit Allowed total -≤9-≤9-≤8-≤6-≤8 Stripe soft stripe excluding, the width should be less than 0.4mm, the length should not be greater than 1/2 of the total length of the device, and should be ≤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 bottom edge of the bell cover should be ground flat, the frosted surface width should not be less than 10mm, and there should be no worn-out air bubbles. 4.3.4 The inner edge of the bottom of the bell cover should be chamfered without gaps. 4.3.5 The mouth of the bell jar should meet the secondary running-in surface, the mouth of the bell jar should meet the tertiary running-in surface, and the rough surface should not be longer than the plug length. 1/3. 4.3.6 The uniformity of wall thickness shall comply with 4.1.1.2 of JY/T 0423-2011. 4.3.7 The roundness error shall conform to JY/T 0423-2011 Section 4.4.1. 4.4 Chemical stability Should meet water resistance HGB level 1, acid resistance H1 level, alkali resistance A2 level. 4.5 Internal stress The internal stress should not be greater than 180 nm/cm. 4.6 Environmental test The environmental test shall be in accordance with Chapter 8 of JY/T 0423-2011.

5 Test method

5.1 Dimensions are measured with a vernier caliper with a division value of 0.02mm and a steel ruler with a division value of 0.5mm, which shall meet the requirements of 4.2 of this standard. begging. 5.2 Wall thickness and uniformity shall be tested in accordance with JY/T 0423-2011 Section 4.1.2, and shall meet the requirements of Article 4.2 and 4.3.6 of this standard. Missing appearance The length of the depression is measured with a reading microscope and shall comply with the corresponding requirements of this standard. 5.3 Roundness shall be in accordance with JY/T 0423-2011 Section 4.4.2 and shall conform to 4.3.7 of this standard. 5.4 Water resistance, acid resistance, and alkali resistance Test in accordance with JY/T 0423-2011 Section 6.5.2, shall meet the requirements of 4.4 of this standard. 5.5 Adhesion test according to JY/T 0423-2011 Section 4.3.2. 5.6 The internal stress shall be in accordance with JY/T 0423-2011 Section 6.1.2 and shall comply with 4.5 of this standard. 5.7 The material test shall be in accordance with Article 7.2 of JY/T 0423-2011, which shall comply with 4.1 of this standard, and shall not have obvious yellow-green. 5.8 The other sensory tests shall meet the corresponding requirements of this standard. 5.9 The environmental test shall be in accordance with Chapter 8 of JY/T 0423-2011 and shall comply with 4.6 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 for factory inspection and type inspection shall comply with Table 3. Table 3 Inspection items and inspection methods for defect classification, factory inspection and type 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 4. No. Inspection Content Defect Classification Factory Inspection Type Inspection

1 Geometry and fit

1.1 Wall thickness B ○ ● 1.2 Frosting Requirements A ● ● 1.3 Grinding size A ○ ● 1.4 Adhesiveness (with bell jar) B ● ●

2 appearance requirements and test methods

2.1 Appearance defect B ● ● 2.2 Color C ● ● 2.3 Oral Processing C ● ● 2.4 Bottom B ● ●

3 Physical and chemical properties and test methods

3.1 Internal stress A ● ● 3.5 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. Table 4 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 batch shall be determined in accordance with GB/T 2828.1-2003, a normal sampling once inspection plan, AQL value. 1.5 for internal stress, external The shape size is 6.5, and the rest is 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. ......

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