GB/T 33618-2017 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
GB/T 33618-2017: Textiles - Test method for visible smoke release and heat release properties during combustion process 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 33618-2017: Textiles - Test method for visible smoke release and heat release properties during combustion process---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/GBT33618-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 59.080.30 W 04 Textiles - Test method for visible smoke release and heat release properties during combustion process Issued on: MAY 12, 2017 Implemented on: DECEMBER 1, 2017 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration Committee. 3. No action is required - Full-copy of this standard will be automatically & immediately delivered to your EMAIL address in 0~60 minutes. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 Symbols... 5 5 Principle... 6 6 Equipment ... 7 7 Sample preparation ... 10 8 Test environment ... 11 9 Instrument calibration ... 12 10 Test steps ... 13 11 Results calculation and expression... 15 12 Test report ... 17ForewordThis Standard was drafted in accordance with the rules given in GB/T 1.1-2009. This Standard was proposed by China Textile Industry Federation. This Standard shall be under the jurisdiction of National Technical Committee on Textile of Standardization Administration of China (SAC/TC 209). The drafting organizations of this Standard. Guangzhou Fiber Products Testing and Research Institute, Spinning Standard Test and Certification Center Co., Ltd. Main drafters of this Standard. Luo Shengli, Zhu Ruixi, Nie Fengming, Han Yuru, Zhang Peng, Wu Wenyi, Feng Zeqiang. Textiles - Test method for visible smoke release and heat release properties during combustion process1 ScopeThis Standard specifies the test method for visible smoke release and heat release properties during combustion process. This Standard applies to various fabrics and their products.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 3820, Determination of thickness of textiles and textile products GB/T 6529, Textiles - Standard atmospheres for conditioning and testing3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply. 3.1 thermal irradiance the heat radiation energy per unit area of the sample surface per unit time 3.2 time to ignition at a certain degree of thermal radiation, with an arc igniter ignition, the time FROM the sample exposure to the heat radiation source TO the flame appearance 3.3 mean mass loss rate the ratio of the mass loss per unit time of the sample to the exposed area during combustion process 3.4 heat release rate weighing device shall not exceed 1 g in 30 min. 6.3 Ignition device Through the position (13 ± 2) mm above the center of the sample, discharge 10kV to complete the ignition. The spark gap of the spark plug shall be (3.0 ± 0.5) mm. The high voltage connected to the spark plug electrode must not be connected to the housing so as to reduce interference from the data transmission line. For ignition test, the spark discharge shall be continuously operated at 50Hz ~ 60Hz. After the flame is generated for 4s, the igniter shall be removed. 6.4 Ignition timer The ignition timer shall be able to be segmented. The resolution is 1s and the timing error is less than 1 s/h. 6.5 Thermal radiation cone Thermal radiation cone can produce 0~100 kW/m2 heat radiation on the surface of the sample. Thermal irradiance shall be uniform. In the center 50mm × 50mm range of the exposed sample, the thermal irradiance deviation to that of the center shall not exceed ± 2%. 6.6 Radiation protection board There shall be an extractable radiation protection board between the thermal radiation cone and the sample so as to protect the sample from heat radiation prior to the test. The protective plate shall be made of non-combustible material with a total thickness of not more than 12 mm. The radiation protection board may be one of the following. a) water-cooled wear-resistant matte black coating with a layer of surface emissivity ε = 0.95 ± 0.05; b) non-water-cooled metal or ceramic with upper surface of reflection function, so as to minimize the heat radiation transmission. 6.7 Thermal radiation cone temperature controller Temperature range is 0°C ~ 1000°C. Indication resolution is 2°C. 6.8 Heat flow meter The heat irradiance of the cone heater shall be calibrated by using a heat flow meter. The heat flow meter range is 0~100 kW/m2. Error shall be controlled within ± 3%.9 Instrument calibration9.1 Weighing device Calibration weighing device shall use the weighing standard piece within the sample quality range. Close the thermal radiation cone and cool the device to ambient temperature before calibration. Place the sample rack on the weighing device. Zero the weighing device. Load 250 g or other suitable quality weight. After the stability, record the output value of weighing device then complete the correction. The calibration of the weighing device shall be zero before each test. 9.2 Oxygen analyzer When calibrating the oxygen analyzer, the thermal radiation cone can be operated or closed, but shall not be in the warming stage. Turn on the fan and adjust the exhaust flow to (0.024±0.002) m3/s. At zero calibration, put the pure nitrogen gas into the analyzer, so that its flow and pressure are same with that of sample. Adjust the indication value of analyzer to (0.00±0.01)%. When it is put into dry ambient air, adjust the indication value to (20.95±0.01)% and set the flow rate to the flow rate used to test the sample. After each sample test, it shall use the dry ambient air to ensure that the analyzer's indication value is (20.95±0.01)%. 9.3 Heat release rate When the test is carried out at each experimental day, the heat release rate calibration shall be performed to determine the calibration constant C for oxygen consumption analysis. In calibration, the thermal radiation cone can be either operated or closed, but shall not be in the warming stage. Turn on the fan and adjust the exhaust flow to (0.024±0.002) m3/s. Collect the baseline data at a time interval of 5 s and it shall at least last 1 min. According to the net combustion heat of methane of 50.0×103 kJ/kg, put methane into the calibration burner. With the calibrated flow meter, obtain the flow with a corresponding heat release rate of 5.0 kW. After the balance, collect the data at a time interval of 5 s and it shall at least last 3 min. Record the calibration constant C for oxygen consumption analysis. 9.4 Thermal radiation cone When the test is carried out at each experimental day or the thermal irradiance is changed, it shall use the thermal irradiance generated by heat flow meter to thermal radiation cone for measurement. And adjust the thermal irradiance control system to achieve the desired thermal irradiance (error does not exceed ± 2%). When the heat flow meter is inserted into the calibration position, the sample or sample mounting bracket shall not be used. test intermittent period, place a thermal insulation layer (for example, an empty sample holder with a heat-resistant fiber mat or a water-cooled radiation protection board) above the weighing device, so as to avoid excessive heat transfer to the weighing device. 10.3 Test 10.3.1 In the test environment, remove the humidity-balanced sample from the sealer. Install the sample according to 7.3. Place the well-installed sample rack on the weighing device. Weigh the sample mass. Adjust the distance between the bottom of the thermal radiation cone and the surface of the sample as (25±1) mm to ensure that the sample rack is aligned with the center of the thermal radiation cone. 10.3.2 Remove the sample rack that holds sample. Place an insulation layer above the weighing device. 10.3.3 Set the temperature corresponding to the heat radiation. Turn on the power supply of thermal radiation cone. NOTE. Commonly used thermal irradiances are 25 kW/m2, 35 kW/m2 or 45 kW/m2. 10.3.4 After the thermal radiation cone is heated to the temperature corresponding to the set thermal irradiance, set the sampling time interval (generally not more than 5s). Collect baseline data for 1 min. 10.3.5 Insert the radiation protection board. Remove the insulation layer that protects the weighing device. Place the sample rack that holds sample on the weighing device. NOTE. The radiation protection board sh... ......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 33618-2017 be delivered?Answer: The full copy PDF of English version of GB/T 33618-2017 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 33618-2017_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 33618-2017_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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