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LY/T 1364-2020 English PDF

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LY/T 1364-2020: Plywood for railway passenger coach
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LY/T 1364: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
LY/T 1364-2020English299 Add to Cart 3 days [Need to translate] Plywood for railway passenger coach Valid LY/T 1364-2020
LY/T 1364-2006English319 Add to Cart 3 days [Need to translate] Carriage plywood with sliced veneer Obsolete LY/T 1364-2006
LY/T 1364-1999English239 Add to Cart 2 days [Need to translate] Carriage plywood with sliced veneer Obsolete LY/T 1364-1999

PDF similar to LY/T 1364-2020


Standard similar to LY/T 1364-2020

GB/T 4897   LY/T 1580   HJ 571   LY/T 2512   LY/T 2146   LY/T 1330   

Basic data

Standard ID LY/T 1364-2020 (LY/T1364-2020)
Description (Translated English) Plywood for railway passenger coach
Sector / Industry Forestry Industry Standard (Recommended)
Classification of Chinese Standard B70
Classification of International Standard 79.060.10
Word Count Estimation 13,148
Date of Issue 2020-03-30
Date of Implementation 2020-10-01
Older Standard (superseded by this standard) LY/T 1364-2006
Regulation (derived from) Announcement No. 6 of 2020 by the State Forestry and Grassland Bureau
Issuing agency(ies) State Forestry and Grassland Administration

LY/T 1364-2020: Plywood for railway passenger coach

---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.
Plywood for railway passenger coach ICS 79.060.10 B 70 People's Republic of China Forestry Industry Standard LY Replace LY/T 1364-2006 Plywood for railway passenger cars 2020-03-30 released 2020-10-01 Implementation Issued by the State Forestry and Grassland Administration

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard is a revision of LY/T 1364-2006 "Plywood for Railway Passenger Cars". Compared with LY/T 1364-2006, this standard mainly The technical content changes are as follows. --Added the terms and definitions of plywood for railway passenger cars; -Deleted the classification requirements of plywood for railway passenger cars according to the processing method of the surface board; --Increase the technical requirements for plywood materials and structure, panel splicing, and panel thickness for railway passenger cars; - Increased the technical requirements for flatness of plywood for railway passenger cars, and cancelled the technical requirements for warpage; -Modified the technical requirements for the thickness tolerance and nominal thickness deviation of the plywood for railway passenger cars; -Modified the technical requirements for appearance defects of plywood for railway passenger cars; --- Increase the technical requirements and test methods for static bending strength, elastic modulus, immersion and peeling of plywood for railway passenger cars; --- Increase the technical requirements and test methods for the oxygen index, 45° angle combustion, and total volatile organic compounds of plywood for railway passenger cars; -The technical requirements and test methods for the surface bonding strength of plywood for railway passenger cars have been cancelled; Please note that certain contents of this document may involve patents. The issuing agency of this document is not responsible for identifying these patents. This standard was proposed and managed by the National Wood-based Panel Standardization Technical Committee (SAC/TC198). Drafting organizations of this standard. CRRC Qingdao Sifang Rolling Stock Co., Ltd., CRRC Tangshan Rolling Stock Co., Ltd., Huzhou Hengding Product Testing Center, Dehua Rabbit Baby Decoration New Material Co., Ltd., Qingdao Sifang Xincheng Zhizhuo Bus Parts Co., Ltd., Jiangsu Aimei Sen Wood Industry Co., Ltd., Jiangxi Product Quality Supervision and Inspection Institute, Linyi Product Quality Supervision and Inspection Institute, Chinese Academy of Forestry Wood Industry Industry Research Institute, CRRC Changchun Rail Vehicle Co., Ltd., CRRC Nanjing Puzhen Rolling Stock Co., Ltd., CRRC Sifang Locomotive and Rolling Stock Co., Ltd. Company, Qingdao Siji Ruihua Industry and Trade Co., Ltd., Qingdao Longyu Wood Co., Ltd., CRRC Chengdu Locomotive and Rolling Stock Co., Ltd., Xuzhou Huayu Wood Industry Co., Ltd. The main drafters of this standard. Xu Huiqing, Xu Yanbing, Meng Qing, Chai Guoli, Sun Jingbo, Li Xiaoke, Xu Shidong, Liu Yuanqiang, Wang Shou Zhang, Li Li, Cheng Limei, Yang Xu, Zhang Weihong, Zhang Hong, Peng Limin, Li Peize, Gao Dengke, Zhang Guangming, Huang Qiuxia, Xu Faqiang, Chen Peng Yu, Jing Jun'e, Wang Lu. The previous versions of the standard replaced by this standard are as follows. Plywood for railway passenger cars

1 Scope

This standard specifies the terms and definitions, classification, requirements, inspection methods, inspection rules, marking, packaging, and Transportation and storage. This standard applies to the plywood used inside railway passenger cars, and other railway vehicles can refer to it for implementation.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated references, the latest version (including all amendments) applies to this document. GB/T 1933 Method for determination of wood density GB/T 2828.1-2012 Sampling Inspection Procedures by Attributes Part 1.Batch-by-batch Inspection Sampling Retrieved by Acceptance Order Limit (AQL) GB/T 9846-2015 ordinary plywood GB/T 17657-2013 Test method for physical and chemical properties of wood-based panels and facing wood-based panels GB/T 18259-2018 Artificial board and its surface decoration terms GB 18580 The limit of formaldehyde emission in wood-based panels and products of interior decoration materials GB/T 19367-2009 Determination of the size of wood-based panels HJ 571-2010 Technical Requirements for Environmental Labeling Products Artificial Panels and Products TB/T 3138 Technical requirements for flame retardant materials for rolling stock LY/T 2717-2016 General technical requirements for wood-based panel product packaging

3 Terms and definitions

The following terms and definitions defined in GB/T 18259-2018 apply to this document. 3.1 Plywood for railway passenger coach Veneer made of basswood, ash, oak, birch, eucalyptus, Liuan or broad-leaved trees with similar wood properties, assembled and glued Made of plywood used for the roof, wall, partition, floor and interior equipment parts of railway passenger cars.

4 categories

4.1 According to water resistance. a) Type I plywood, that is, weather-resistant plywood, can pass the boiling test; b) Type II plywood, that is, moisture-resistant plywood, can pass the 63℃±3℃ hot water immersion test.

5 requirements

5.1 Material and structure 5.1.1 Generally, the wood grains of two adjacent layers of veneers should be perpendicular to each other. 5.1.2 The veneers of the symmetrical layers on both sides of the center layer should be the same thickness, the same tree species or the same tree species with similar physical properties, and the same production method (that is, both It is peeled or sliced), the wood grain arrangement direction should also be the same. Two adjacent layers of veneers with parallel wood grain directions are allowed to be combined into one layer. Test the strong bonding When the temperature is high, the two-layer veneer is regarded as one layer. The watch plate should face outwards. 5.1.3 There should be no inclusions in the plywood that affect the smoothness of the board and the quality of the glue. 5.1.4 The thickness of the surface board shall not be less than 0.55mm, and the thickness of the surface board of the plywood for floor shall not be less than 1mm. 5.1.5 Panel splicing 5.1.5.1 The top grade panel should be a whole panel or two veneers should be spliced roughly in the center of the panel, and the seams should be tight. 5.1.5.2 The first-class panels should be tight, with similar wood color and texture, and the number of spliced veneers should not exceed 7. 5.1.5.3 The number of spliced veneers for the panels of qualified products is not limited. 5.1.5.4 The seams of all grades should be parallel to the board edge. 5.2 Specifications and deviations 5.2.1 Format specifications The format specifications should meet the requirements of Table 1. 5.2.2 Thickness specifications The usual thicknesses are 3mm, 5mm, 10mm, 15mm, 20mm, 25mm, 30mm, and other thicknesses can also be produced according to the agreement between the supplier and the buyer product. 5.2.3 Dimensional deviation 5.2.3.1 The length and width deviation is ＋5mm. 5.2.3.2 The verticality of the board is not more than 1mm/m. 5.2.3.3 The edge straightness of the board shall not be greater than 1mm/m. 5.2.3.4 Flatness When the format is 1220 mm×1830 mm and above, the flatness deviation is not more than 8mm. When the format is less than 1220 mm×1830 mm, the flatness deviation is not more than 5mm. Note. When the thickness is 7mm and above plywood, check the flatness. 5.2.3.5 The thickness tolerance and thickness deviation of the double-sided sanding plywood board shall meet the requirements of Table 2. 5.3 Appearance quality 5.3.1 Classification Plywood is divided into three categories. high-quality, first-class, and qualified products according to the number and scope of material defects and processing defects visible on the finished board panel grade. All grades of plywood should be sanded on both sides. If one side of the product is a front panel and the other side is a back panel, the appearance quality of the back panel should conform to the ordinary plywood specified in GB/T 9846-2015 Backplane requirements. 5.3.2 Appearance defects The allowable defects of appearance grading shall meet the requirements of Table 3. 5.4 Physical and chemical properties 5.4.1 Moisture content and bonding strength 5.4.1.1 The moisture content and bonding strength should meet the requirements of Table 4 5.4.1.2 For plywood made of different tree species, the bonding strength should be the index with the smallest requirement for the bonding strength index value of each tree species value. 5.4.1.3 If the average wood damage rate of the test piece for the determination of the bonding strength exceeds 80%, the bonding strength index value can be compared with that specified in Table 5. The index value is 0.20MPa lower. 5.4.1.4 For the plywood made of other domestic hardwoods not specified in Table 4, the gluing strength index value can be compared according to its density. According to the index values of basswood and Fraxinus mandshurica as specified in Table 4; for plywood made of other tropical broad-leaved trees, the gluing strength index value can be based on the tree The density of the species is in accordance with the regulations in Table 5.If the density is below 0.60g/m3, the index value of Liuan shall be adopted, and the index value of Abdon will be adopted if the density exceeds 0.60g/m3. When there is a dispute between the supplier and the buyer about the density of the tree species, it shall be determined in accordance with the provisions of GB/T 1933. 5.4.2 Dipping and peeling When the wood grain direction of adjacent layers of plywood is the same, the immersion peel test shall be carried out, and the peel length of each side of the same adhesive layer of each test piece shall be accumulated No more than 25mm. 5.4.3 Screw holding force (front) The screw holding force (front) of the plywood should not be less than 1500N. 5.4.4 Bending strength and elastic modulus The index values of static flexural strength and elastic modulus should meet the requirements of Table 5. 5.4.5 Formaldehyde emission limit Should meet the requirements of GB 18580. 5.4.6 Total Volatile Organic Compounds (TVOC) Should comply with HJ 571-2010, the total volatile organic compound (TVOC) release rate of plywood shall not exceed 0.5 mg/(m2.h) (72h). 5.4.7 Oxygen Index The oxygen index of plywood should meet the requirements of TB/T 3138. 5.4.8 Burning at 45° angle The 45° angle combustion of the plywood shall meet the requirements of TB/T 3138.

6 Inspection method

6.1 Inspection of specifications 6.1.1 Measuring tools Measuring tools include. --Micrometer, division value 0.01mm; --Steel ruler, graduation value 0.5mm; --Steel tape, graduation value 1.0mm; --Metal wire (such as steel wire, etc.), the diameter is not more than 0.5 mm. 6.1.2 Thickness, width and length According to the relevant regulations of GB/T 19367-2009. 6.1.3 Verticality and edge straightness According to the relevant regulations of GB/T 19367-2009. 6.1.4 Flatness inspection According to the relevant regulations of GB/T 19367-2009. 6.2 Appearance quality inspection Visual inspection and measuring tools inspect the appearance defects of the plywood. 6.3 Sampling and size requirements of physical and chemical properties test pieces 6.3.1 Sampling should be in the same batch, the same specification, and the same type of product according to the regulations. 6.3.2 When intercepting samples and test pieces, material defects and processing defects that affect the accuracy of the test should be avoided. 6.3.3 The specimen does not allow focal edges, the edges should be straight, and the two adjacent edges should be at right angles. 6.3.4 Sampling of test specimens for moisture content, bonding strength, immersion peeling, static bending strength, and elastic modulus shall be in accordance with the provisions in 6.2.2 of GB/T 9846-2015 The amount of formaldehyde emission, total volatile organic compound (TVOC), oxygen index, and combustion at a 45° angle are carried out according to their respective sampling regulations. 6.3.5 The size and quantity of the test pieces shall meet the requirements of Table 6. 6.4 Water content According to the provisions of 4.3 in GB/T 17657-2013. 6.5 Bonding strength 6.5.1 According to the provisions of 4.17 in GB/T 17657-2013. 6.5.2 All plywood whose thickness of the surface board (the thickness of the veneer before gluing) is greater than 1mm adopts the A-type test piece size; the thickness of the surface board is from 1mm (including 1mm) The following plywood adopts B-type specimen size. Type I plywood shall be pretreated according to the provisions of 4.17.5.2.3 in GB/T 17657-2013. Type Ⅱ plywood shall be pretreated according to the provisions of 4.17.5.2.2 in GB/T 17657-2013. 6.6 Dipping and peeling According to the provisions of 4.19 in GB/T 17657-2013. 6.7 Screw holding force It is carried out in accordance with 4.21 of GB/T 17657-2013, and the test piece needs to be balanced. 6.8 Bending strength and elastic modulus According to GB/T 17657-2013 in 4.7, the test piece needs to be balanced. 6.9 Formaldehyde emission limit According to the provisions of GB 18580. 6.10 Total Volatile Organic Compounds (TVOC) According to HJ 571-2010 Appendix A regulations. 6.11 Determination of oxygen index According to TB/T 3138 regulations. 6.12 45° angle combustion According to TB/T 3138 regulations.

7 Inspection rules

7.1 Inspection classification 7.1.1 Product inspection is divided into factory inspection and type inspection. 7.1.2 The factory inspection includes the following items. a) Appearance quality inspection; b) Specification and size inspection; c) Water content and bonding strength in the physical and chemical performance test items. 7.1.3 Type inspection includes all items of factory inspection and immersion peeling, static bending strength, elastic modulus, screw holding force, formaldehyde emission, Volatile organic compounds (TVOC), oxygen index, 45° angle combustion. Type inspection should be carried out in one of the following situations. a) At the first production; b) When the original and auxiliary materials and production process have changed significantly; c) When production is resumed one year after production is stopped; d) During normal production, the type inspection shall not be less than once every 1 year; e) When the quality supervision agency proposes type inspection requirements. 7.2 Sampling plan 7.2.1 Appearance quality inspection The general inspection level in GB/T 2828.1-2012 is Ⅱ and the acceptance quality limit (AQL) is 4.0.The appearance quality The quantity sampling plan is carried out in accordance with Table 7. 7.2.2 Specification and size inspection Adopt a single sampling plan with special inspection level of S-4 and acceptance quality limit (AQL) of 6.5 in GB/T 2828.1-2012, specifications and dimensions The sampling plan is carried out according to Table 8. 7.2.3 Physical and chemical performance inspection The physical and chemical properties sampling plan is carried out according to Table 9. 7.3 Judgment rules 7.3.1 Appearance quality, specification and size determination rules When the appearance quality, specifications, dimensions and deviations meet the requirements of 5.3, 5.2 and Table 7, and Table 8, the appearance quality and specifications of the batch of samples are determined The size is qualified, otherwise it should be downgraded or judged as unqualified. 7.3.2 Judgment rules for physical and chemical properties 7.3.2.1 When the water content, static bending strength, elastic modulus, and screw holding force of the test piece meet the index value, it is judged as qualified, otherwise Judged as unqualified. 7.3.2.2 If the number of test pieces meeting the requirements of the bond strength index value is equal to or greater than 90% of the total number of valid test pieces, it is considered qualified, and less than 70% is considered qualified Unqualified. When the number of test pieces that meet the requirements of the bond strength index value is equal to or greater than 70% of the total number of effective test pieces, but less than 90%, it is allowed to Qualified items are re-sampled for re-inspection, and the number of test pieces meeting the requirements of the bond strength index value is equal to or greater than 90% of the total number of valid test pieces If it is less than 90%, it is judged as qualified. 7.3.2.3 When the number of test pieces that meet the requirements of the impregnation peel index value is equal to or greater than 5 pieces, it is judged as qualified, otherwise it is judged as unqualified. 7.3.2.4 The amount of formaldehyde released shall be determined in accordance with the determination rules of GB 18580. 7.3.2.5 Total Volatile Organic Compounds (TVOC) shall be carried out in accordance with the determination rules in Appendix A of HJ 571-2010. 7.3.2.6 The oxygen index determination rules shall be carried out in accordance with TB/T 3138. 7.3.2.7 The 45° angle combustion judgment rule shall be carried out in accordance with TB/T 3138. 7.4 Comprehensive judgment When the appearance quality, size, deviation, and physical and chemical properties meet the requirements of the corresponding grade, the batch of products is judged to be qualified, otherwise it is not qualified. 8 Identification, packaging, transportation and storage 8.1 Identification 8.1.1 Mark the product name, category, grade, formaldehyde emission level, etc. on the lower right corner or side of each plywood backboard. 8.1.2 The grade mark uses excellent, one, and qualified to represent each grade of plywood. 8.2 Packaging Products should be properly packaged according to different types and specifications. Each package should be accompanied by the product name, the tree species and thickness of the panel and core, and Category, grade, use, manufacturer name, executive standard number, trademark, format size, quantity, product standard number and formaldehyde emission limit mark Inspection label. Other requirements shall be carried out in accordance with LY/T 2717-2016 "General Technical Requirements for Packaging of Artificial Panel Products". 8.3 Transportation and storage The product should be protected from moisture, rain, sun and deformation during transportation and storage.

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