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GB/T 24134-2009: Rubber and plastics hoses -- Assessment of ozone resistance under static conditions Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 24134-2009: Rubber and plastics hoses -- Assessment of ozone resistance under static conditions---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/GBT24134-2009 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 23.040.70 G 42 GB/T 24134-2009 / ISO 7326.2006 Rubber and plastics hoses - Assessment of ozone resistance under static conditions (ISO 7326.2006, IDT) Issued on: JUN 15, 2009 Implemented on: FEBRUARY 1, 2010 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of the People’s Republic of China; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 Introduction... 4 1 Scope... 5 2 Normative references... 5 3 General considerations... 6 4 Apparatus... 6 5 Test pieces... 6 6 Conditioning of test pieces... 7 7 Test conditions... 8 8 Procedure... 8 9 Test report... 11ForewordThis Standard equivalently adopts ISO 7326.2006 Rubber and plastics hoses - Assessment of ozone resistance under static conditions (English version). This Standard is equivalent to translation of ISO 7326.2006. In normative documents of this Standard, the 5.1, 5.2, 5.3, 5.4, 5.5, 5.6 (Ozone box and test frame that are specified by the standard) quoted from the technical content of GB/T 7762-2003 ARE completely consistent with the 5.1, 5.2, 5.3, 5.4, 5.5, 5.6 in ISO 1431-1.1989. For ease of use, this Standard also makes the following editorial changes. a) Delete the foreword of the international standard; b) "This Standard" is changed to be "this Standard"; c) Use 10-8 to replace the representation method of pphm, because pphm is not a legal metrological unit; d) Use decimal point “.” to replace the comma "," that acts as decimal point. This Standard was proposed by China Petroleum and Chemical Industry Association. This Standard shall be under the jurisdiction of National Rubber Product Standardization Technical Committee – Rubber Hose Sub-technical Committee (SAC/TC 35/SC 1). Drafting organizations of this Standard. Shenyang 4th Rubber (plant) Co., Ltd., Pingdingshan Kuanyi Hose Product Co., Ltd., Aditya (Shenyang) Rubber Product Co., Ltd. AND Masson Shandong Automobile Parts Co., Ltd. The drafters of this Standard. Dong Guifen, Li Hongchen, Liang Xizhen, Li Yuping and Zhao Shuying.IntroductionThe methods described in this Standard provide a means of assessing the resistance of hoses to the deleterious effects of atmospheric ozone under static conditions. Rubber and plastics hoses - Assessment of ozone resistance under static conditions WARNING – The personnel who use this Standard shall have the practical working experience in a regular laboratory. This Standard does not indicate all possible safety issues. Users have the responsibility to take appropriate safety and health measures, and to ensure that the conditions comply with relevant national regulations.1 ScopeThis Standard specifies five methods for determining the ozone resistance of the outer covers of hoses. ۛ method 1.for bore sizes up to and including 25 mm, carried out on the hose itself; ۛ method 2.for bore sizes greater than 25 mm, carried out on a test piece from the hose wall; ۛ method 3.for bore sizes greater than 25 mm, carried out on a test piece from the cover; ۛ method 4.for all bore sizes, carried out on the hose itself; ۛ method 5.for all bore sizes, carried out on hoses that are expandable, for example textile-reinforced hoses. NOTE. For hoses with built-in fittings from which it is not possible to take test pieces, the ozone resistance may be assessed on slabs in accordance with GB/T 7762, using test sheets of the appropriate polymeric compound vulcanized to the same degree.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 2941 Rubber - General procedures for preparing and conditioning test pieces for physical test methods (GB/T 2941-2006, ISO 23529.2004, IDT) GB/T 7762-2003 Rubber - vulcanized or thermoplastic - Resistance to ozone cracking - Static strain test (ISO 1431-1.1989, MOD)3 General considerationsMethods 1 and 2 are the methods normally used, method 3 being for use only if it is not possible to carry out the test in accordance with method 2.Method 4 is suitable for all bore sizes. Method 5 is specifically for testing expandable hoses in the expanded state. The results of tests carried out in accordance with method 1 may not be comparable with the results obtained when tests are carried out in accordance with method 2 or 3, even if the cover compounds of the hoses under test are identical in composition and are cured to the same degree. The test method to be used shall be as specified in the product standard.4 ApparatusAll apparatus placed in the test cabinet shall be fabricated from materials which do not absorb or decompose ozone. 4.1 Ozone cabinet, with apparatus for generating ozone and monitoring and controlling the ozone concentration, as described in GB/T 7762-2003. 4.2 Test piece holder, as shown in Figure 1 (for method 1). 4.3 Test piece holder, as shown in Figure 2, made, for example, of wood coated with paint or aluminium (for method 2). 4.4 Jig, for elongation of test pieces (for method 3). Details given in GB/T 7762-2003, Subclause 5.6, shall be followed. 4.5 Cylinder, as shown in Figure 3, with an outside diameter eight times that of the hose being tested (for method 4). 4.6 Round rod, as shown in Figure 4, with an outside diameter 1.2 times the inside diameter of the hose being tested (for method 5).5 Test pieces5.1 Type of test piece 5.1.1 Method 1 The test piece shall consist of a hose sample. The length shall be calculated by the equation (1). ......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 24134-2009 be delivered?Answer: The full copy PDF of English version of GB/T 24134-2009 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 24134-2009_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 24134-2009_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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