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Delivery: <= 6 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 19278-2018: General terms and their definitions of thermoplastic pipes, fittings and valves Status: Valid GB/T 19278: Historical versions
Basic dataStandard ID: GB/T 19278-2018 (GB/T19278-2018)Description (Translated English): General terms and their definitions of thermoplastic pipes, fittings and valves Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G33 Classification of International Standard: 83.140.30 Word Count Estimation: 38,382 Date of Issue: 2018-12-28 Date of Implementation: 2019-07-01 Older Standard (superseded by this standard): GB/T 19278-2003 Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration GB/T 19278-2018: General terms and their definitions of thermoplastic pipes, fittings and valves---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.General terms and their definitions of thermoplastic pipes, fittings and valves ICS 83.140.30 G33 National Standards of People's Republic of China Replace GB/T 19278-2003 Thermoplastic pipes, fittings and valves General terms and definitions Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued ContentForeword III Introduction IV 1 Scope 1 2 Terms and Definitions 1 Appendix A (informative) Relationship between pipeline pressure resistance and long-term hydrostatic test results 20 Appendix B (informative) Table of correspondence between commonly used symbols, abbreviations and Chinese names 22 Reference 24 Index 25ForewordThis standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 19278-2003 "General terms and definitions of thermoplastic pipes, fittings and valves". And GB/T 19278- Compared with.2003, the main technical changes are as follows. ---Adjusted the concept system. the terms are related to materials, related to product structure, related to size and size, related to product characteristics And five parts (subsets) related to the application; --- Re-determined the location of each concept and related definitions; --- Removed homopolypropylene, random copolymer polypropylene, block copolymer polypropylene, cross-linked polyethylene, non-plasticized polyvinyl chloride, 20 ° C, 50 years of lower confidence limit, 20 ° C, 50 years long-term strength and other terms and definitions (see.2003 edition 5.4~5.8, 5.10, 5.12); --- Increased terms and definitions for hydrostatic strength, graded strength (see 2.1); --- Added parts, multi-layer pipes, composite pipes, reinforced thermoplastic composite pipes, fiber reinforced plastic pipes, molecularly oriented polyvinyl chloride pipes, Barrier pipe, cladding pipe, functional layer, socket, pipe fitting with insert, steel-plastic conversion pipe fitting, inspection well, secondary processing and valve Related terms and definitions (see 2.2); --- Added nominal size DN/OD, nominal size DN/ID, nominal size WN/HN, (any point) inner diameter, joint length, most Terms and definitions of small bending radius, size group, nominal value; average diameter modified to medium diameter, nominal diameter of socket is modified to Weigh the inner diameter (see 2.3); --- Removed the terms and definitions of the maximum roundness, minimum wall thickness and maximum wall thickness of the socket (see.2003 edition 3.15, 3.19, 3.20); --- Increased longitudinal bending stiffness, ring flexibility, compression cracking stability, longitudinal retraction, opening and closing torque, flow coefficient, rated flow system Terms and definitions of the number, relative flow coefficient, and inherent flow characteristics (see 2.4); --- Increased internal pressure, working pressure, design pressure, design temperature, cold water temperature, temperature-to-pressure reduction factor, fusion compatibility, Terminology and definition of elastic socket connection, bonding, electrofusion connection, hot melt connection, hot melt butt joint; leakage damage modified to leak; 2.5.1) --- Removed cylindrical socket, tapered socket, mechanical connection pipe fitting, elastic sealing pipe fitting, solvent bonding pipe fitting, hot melt butt pipe Terms and definitions of pieces, hot melt socket fittings (see.2003 editions 4.6~4.10, 4.12, 4.13); --- Added terms and definitions related to pipeline repair and renewal, irrigation and high pressure oil and gas pipelines (see 2.5.2~2.5.4); --- Added the informative appendix "The relationship between pipeline pressure resistance and long-term hydrostatic test results" (see Appendix A); --- Added English corresponding word index. This standard was proposed by the China Light Industry Association. This standard is under the jurisdiction of the National Plastics Standardization Technical Committee (SAC/TC48). This standard was drafted. Beijing Technology and Business University (Light Industry Plastics Processing Application Research Institute), Huachuang Tianyuan Industrial Development Co., Ltd., Zibo Jielin Plastic Pipe Co., Ltd., Baolu Qixing Pipe Industry Co., Ltd., Beijing Municipal Engineering Design and Research Institute Co., Ltd., Yada Group Company, Zhejiang Weixing New Building Materials Co., Ltd., Shanghai Baidie Pipe Technology Co., Ltd., Rifeng Enterprise (Foshan) Co., Ltd., Yong Gao Co., Ltd., Shanghai Tianli Industry (Group) Co., Ltd., Zhangzhou Mingzhu Plastic Co., Ltd., Daxie Water Conservation Group Co., Ltd. Company, Fujian Yatong New Material Technology Co., Ltd. The main drafters of this standard. Li Peng, Xiang Aimin, Xie Jianling, Xu Hongyue, Chen Zhong, Wang Zhiwei, Li Dazhi, Chai Gang, Peng Xiaotong, Huang Jian, Zhu Liping, Chi Yongsheng, Tian Xiaohong, Peng Fudi. The previous versions of the standards replaced by this standard are. ---GB/T 19278-2003.IntroductionPlastic pipe and valve products industry is linked to and through plastic raw materials, molding processing, product structure design, quality assurance, engineering design and Key industries in applications such as applications require a systematic terminology to facilitate inter-industry communication and standardization. This standard has collected more than 300 standard documents in ISO , ASTM, China national standards and major industry standards systems. The important criteria are listed in the reference), and more than 3,000 terms were analyzed and screened to determine and redefine more than 160 of the standard. Terms. This standard pays attention to controlling the total amount while moderately expanding the professional field. On the one hand, some of the simple techniques that can be "as the name suggests" are deleted. Language, intentionally reducing the "long terminology" of compound word formation, choosing the word root or less root terminology of derivation (word formation ability); Extract the essential characteristics of the concept, sum up and refine the upper concept, and give only the typical terms or ambiguous terms to the subordinate concept. surface. At the same time, in order to take care of and cover the terminology needs of emerging applications, some representative areas of expertise such as special composites have also been selected. Engineering application terminology such as structural piping, irrigation, and pipeline repair. For the sake of simplicity and ease of use, abbreviations are given for compound phrase long terms, such as "the lower confidence limit for predicting long-term hydrostatic strength". "lower limit of prediction", etc.; for the concept of a different meaning (or a polysemous) of the same name (such as "nominal size"), the use of Chinese characters in English characters Way, by adding feature information into multiple parallel terms to achieve single-list meaning (for example, "nominal size DN/OD" "nominal size DN/ID"). For ease of understanding, this standard has written a large number of notes. Due to the intersection of the concepts of many terms, different architectures may be obtained according to different classification criteria, thus affecting the terminology. The location in the conceptual system. This standard adopts the basic principles of system ordering, focusing on refining the concepts of higher levels and reducing the underlying concepts. Some genera relationships are treated as associations, and the hierarchy is diluted to simplify the text. The creep properties and long-term pressure resistance of plastic pipes are different from those of traditional pipes, which may cause misunderstandings by users. Appendix A of this standard The relationship between concepts is further explained. Appendix B helps to quickly find the Chinese meaning of symbols and abbreviations. The user can use the Chinese Pinyin index and the English corresponding word index to retrieve the item number of the term. Thermoplastic pipes, fittings and valves General terms and definitions1 ScopeThis standard defines the general terminology and definition of thermoplastic pipes, fittings and valves. This standard applies to the design, manufacture, inspection, application and standardization of thermoplastics and some thermoset plastic pipes, fittings and valves. Other related fields.2 Terms and definitions2.1 Terminology related to materials 2.1.1 Mixed compound A homogeneous mixture obtained by mixing/plasticizing one or several polymers and essential additives for direct processing of the article. Any of them None of the components can be separated mechanically. Note. Granular blends are usually prepared by melt blending; powder blends are usually dry blended and partially plasticized to maintain component stability. 2.1.2 New material virginmaterial Except for the necessary manufacturing process, the materials of the recycled materials (2.1.3) and recycled materials (2.1.4) were not added or used. 2.1.3 Reprocessable material; reworkmaterial A cleaned product that has been rejected from the corners of the production process, samples, or inspections that have been rejected but not used. Performance material. Note. The recycled material produced by the original producer is called the factory recycled material, which is different from other external materials. 2.1.4 Recycled material recycledmaterial Recycled materials A material obtained by cleaning, crushing, grinding or granulating used plastic products. 2.1.5 Hydrostatic strength hydrostaticstrength The average hoop stress on the cross-section of the pipe wall (2.5.1.2) when the pipe component (2.2.1) is destroyed under stable temperature and internal hydraulic pressure. 2.1.6 [Average] long-term hydrostatic strength long-termhydrostaticstrength σLTHS At temperature T, the predicted average hydrostatic strength of the material (2.1.5) is predicted when the damage time reaches t. Note 1. The “average” intensity is the corresponding predicted intensity when the confidence level is 50%; it is the estimated value obtained by statistical processing based on the test results, not straight Test results. Note 2. When specific conditions need to be specified, the condition is often used as a qualifier, such as "20 ° C, 50 years long-term hydrostatic strength". ...... |
