GB/T 14905-2020 PDF EnglishUS$230.00 · In stock · Download in 9 seconds
GB/T 14905-2020: Rubber and plastics hoses. Determination of adhesion between components Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 14905: Historical versions
Similar standardsGB/T 14905-2020: Rubber and plastics hoses. Determination of adhesion between components---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT14905-2020GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 23.040.70 G 42 GB/T 14905-2020 / ISO 8033.2016 Replacing GB/T 14905-2009 Rubber and Plastics Hoses - Determination of Adhesion between Components (ISO 8033.2016, IDT) Issued on. NOVEMBER 19, 2020 Implemented on. OCTOBER 1, 2021 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 5 2 Normative References... 5 3 Terms and Definitions... 6 4 Principle... 6 5 Apparatus... 6 6 Test Pieces... 7 7 Procedure... 11 8 Expression of Results... 11 9 Test Report... 12 Bibliography... 18ForewordThis Standard was drafted in accordance with the rules in GB/T 1.1-2009. This Standard serves as a replacement of GB/T 14905-2009 Rubber and Plastics Hoses - Determination of Adhesion between Components. In comparison with GB/T 14905-2009, the main technical changes are as follows. ---The Chapter “Terms and Definitions” is added (see Chapter 3); ---The scope of application of Type 7 test piece is expanded; it is applicable to hoses whose spacing between adjacent coils of the helix is greater than 10 mm, and also suggestions for the preparation of test pieces when the spacing between adjacent coils of the helix is less than 10 mm are provided (see 6.3.8; 5.3.8 of Version 2009); ---Figure 1 ~ Figure 8 are modified, so that the representation of these figures can be more accurate, and the misunderstandings of standard users can be reduced (see Figure 1 ~ Figure 8; Figure 1 ~ Figure 8 of Version 2009). This Standard uses the translation method in the equivalent adoption of ISO 8033.2016 Rubber and Plastics Hoses - Determination of Adhesion between Components. The Chinese documents that have a consistent correspondence with the international documents in the Normative References of this Standard are as follows. ---GB/T 2941-2006 Rubber - General Procedures for Preparing and Conditioning Test Pieces for Physical Test Methods (ISO 23529.2004, IDT); ---GB/T 12833-2006 Rubber and Plastics - Analysis of Multipeak Traces Obtained in Determinations of Tear Strength and Adhesion Strength (ISO 6133.1998, IDT); ---GB/T 17200-2008 Technical Specification for Tensile, Compression and Flexural Testing Machines for Rubber and Plastics (constant rate of traverse) (ISO 5893.2002, IDT). This Standard was proposed by China Petroleum and Chemical Industry Federation. This Standard shall be under the jurisdiction of National Technical Committee 35 on Rubber & Products of Standardization Administration of China (SAC/TC 35). The drafting organizations of this Standard. Shengli Oilfield Changlong Rubber & Plastic Co., Ltd.; Shenyang Rubber Research & Design Institute. The main drafters of this Standard. Mu Xuejie, Zhang Yigui, Wang Shuli. The issuing of the previous versions. ---GB/T 14905-1994, GB/T 14905-2009. Rubber and Plastics Hoses - Determination of Adhesion between Components1 ScopeAdequate adhesion between components of a hose is the basis for the hose to perform well during use. This Standard specifies methods for the determination of the adhesion between lining and reinforcement, between cover and reinforcement, between reinforcement layers, between cover and outer lamination (thin layer of material outside the cover for protection) and between lining and inner lamination (thin layer of material inside the lining to reduce permeation of fluid into the lining).2 Normative ReferencesThe following documents are indispensable to the application of this document. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. ISO 5893 Rubber and Plastics Test Equipment - Tensile, Flexural and Compression Types (constant rate of traverse) - Specification3 Terms and DefinitionsFor the purposes of this document, the terms and definitions given in ISO 8330 apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses.4 PrincipleUsing test pieces of standard dimensions, the adhesion strength between lining and reinforcement, between cover and reinforcement, between reinforcement layers, between cover and outer lamination and between lining and inner lamination is measured under specified conditions.5 ApparatusThe machine shall be power driven, equipped with a suitable dynamometer, capable of maintaining a substantially constant rate of traverse of the moving head during the test and fitted with an autographic recorder. It shall comply with the requirements for class 0.5 or 1 of ISO 5893. For testing ring test pieces (type 6 and type 8), a mandrel shall be provided that is a close sliding fit in the test piece. This mandrel shall be capable of being fitted into the driven head of the machine so that it will rotate freely during the test.6 Test PiecesStrip, cut from the hose as a 35 mm ± 2 mm wide ring which is then cut transversely to form a strip. Strip, cut along a reinforcing helix, 25 mm ± 0.5 mm wide or the maximum obtainable.7 ProcedureThe rate of travel of the power-driven grip shall be such as to provide a rate of ply separation of 50 mm/min ± 5 mm/min (for test pieces of types 1 to 7) or 25 mm/min ± 2.5 mm/min (for type 8 test pieces). If separation occurs at any other point, for example, inside either component under test, note this failure and report the force at which it occurs.8 Expression of ResultsThe trace obtained from the graphical recorder shows the variations in the force at which the plies or layers have separated.9 Test ReportThe test report shall contain the following information. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 14905-2020 be delivered?Answer: The full copy PDF of English version of GB/T 14905-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 14905-2020_English with my colleagues?Answer: Yes. 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