MT 113-1995 PDF EnglishUS$70.00 · In stock · Download in 9 seconds
MT 113-1995: General Test Methods and Judgment Rules for Fire-resistant Antistatic Properties of Polymer Products for Coal Mines Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Obsolete MT 113: Historical versions
MT 113-1995: General Test Methods and Judgment Rules for Fire-resistant Antistatic Properties of Polymer Products for Coal Mines---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/MT113-1995 MT COAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Replacing MT 113-85 General Test Methods and Judgment Rules for Fire- resistant Antistatic Properties of Polymer Products for Coal Mines Issued on. FEBRUARY 06, 1996 Implemented on. MARCH 01, 1996 Issued by. Ministry of Coal Industry of the People’s Republic of China Table of Contents1 Subject content and scope of application... 3 2 Normative references... 3 3 Terms... 3 4 Fire-resistant properties test methods... 3 5 Surface resistance test methods... 8 6 Judgment rules... 11 7 Inspection and sampling requirements... 12 Additional information... 13 General Test Methods and Judgment Rules for Fire- resistant Antistatic Properties of Polymer Products for Coal Mines1 Subject content and scope of applicationThis Standard specifies the fire-resistant properties, surface resistance test methods, judgment rules, and inspection and sampling requirements of polymer products. This Standard applies to polymer products that can cause prolonged combustion and static sparks in coal mines.2 Normative referencesMT 182, Alcohol blast burner structure and technical requirements3 Terms3.1 Fire-resistant properties It refers to the ability of polymer products to pass the following tests. 3.2 The length flame spread The length of the charred part of the test piece after the flame combustion and flameless combustion of the test piece are extinguished.4 Fire-resistant properties test methods4.1 Alcohol blast burner combustion test method 4.1.1 Test piece Cut 6 test pieces from the sample, each of which is 360 mm long, 50 mm wide, and 5 ~ 10 mm thick. 4.1.2 Instruments and apparatuses a. Blast burner. The blast burner shall meet the requirements of MT 182; the fuel shall be supplied from a container with a graduated tube. The fuel used shall be a mixture (V/V) of 95% ethanol (GB 394) and 5% methanol (GB 338). b. Combustion test chamber. There shall be a machined and sealed matching hole, which serves as the entrance of the blast burner remote control device and the fuel line; the inner surface of the chamber shall be painted black (see Figure 1); the chamber shall be equipped with an adjustable device to ensure that the test piece is in place; a fume hood with an exhaust fan shall be installed on the upper part of the chamber, but it must be premised not to cause changes in flame combustion, otherwise, the fan shall be turned off during the test. c. Stopwatch. The minimum division scale of the stopwatch is 0.01 s. Figure 1 – Schematic diagram of the combustion test chamber 4.1.3 Test procedures 4.1.3.1 The operation and maintenance of the alcohol blast burner shall be 4.1.3.4 Carry out the test in a combustion chamber under low light; ignite the alcohol blast burner; adjust the flame height to 150 ~ 180 mm; the fuel consumption is 2.55 ± 0.15 mL/min. 4.1.3.5 The air flow around the test piece during the test shall be as small as possible, subject to the flame that does not affect the test piece. 4.1.4 Result expression The following test results shall be recorded and calculated. 4.1.4.1 The unit value of the flame combustion time and flameless combustion time of each test piece and drippings; 4.1.4.2 The length flame spread of each test piece; 4.1.4.3 The arithmetic mean of the flame combustion time of 6 test pieces and drippings; 4.1.4.4 The arithmetic mean of the flameless combustion time of 6 test pieces and drippings. 4.2 Alcohol lamp combustion test method 4.2.1 Test piece Cut 6 test pieces from the sample, each of which is 360 mm long, 50 mm wide, and 5 ~ 10 mm thick. 4.2.3.6 The test piece is perpendicular to the door of the combustion chamber, so that both sides of the test piece can be observed. 4.2.4 Result expression The following test results shall be recorded and calculated.5 Surface resistance test methods5.1 Test piece 5.1.1 Cut 3 test pieces from the sample; the size shall not be less than 300 mm × 300 mm, and the thickness shall be 5 ~ 10 mm. 5.1.2 The test piece shall be smooth and free of defects such as cracks, bubbles and mechanical impurities. 5.2 Conductive fluid The composition of the conductive liquid is. (m/m) Anhydrous polyethylene glycol whose molecular weight is 600 4 portions Soft soap 1/200 portions Water 1 portion 5.3 Instruments 5.3.1 Surface resistance tester. The measurement range of the surface resistance tester is 103 ~ 1010 Ω; the accuracy is 1.5; the DC power supply voltage is 50 ~ 500 V; the voltage selection is based on the premise that the power consumption in the test piece is not more than 1 W. 5.4 Determination steps 5.4.1 Determination conditions Test voltage. 500 ± 20 V, 100 ± 10 V, 50 ± 10 V; Test environment. the temperature is 23 ± 2 °C; the relative humidity is (65 ± 5) %. 5.5 Result expression The following determination results shall be recorded and calculated.6 Judgment rules6.1 Fire-resistant properties 6.1.1 Alcohol blast burner combustion test method When testing according to the methods described in this Standard, the following requirements shall be met. 6.1.2 Alcohol lamp combustion test method When testing according to the methods described in this Standard, the following requirements shall be met. 6.2 Surface resistance value Both the arithmetic averages of the surface resistances of the upper and lower surfaces of the test piece shall not be greater than 3×105 Ω.7 Inspection and sampling requirements7.1 The fire-resistant antistatic properties of polymer products for coal mines must be inspected by the Quality Supervision and Inspection Center (hereinafter referred to as the "center") designated by the Ministry of Coal Industry. 7.2 When submitting for inspection, for products that cannot be directly prepared as samples, samples of the same material as the products shall be provided; the sample size is 360 mm × 300 mm, and the thickness is 5 ~ 10 mm. The number of samples is 6 pieces. 7.3 When submitting for inspection, a product type inspection report shall be attached. 7.5 After the validity period of the "Qualification Certificate of Product Inspection" expires, the "center" shall conduct random inspections, and issue a new certificate after the inspection is qualified. 7.6 In response to product quality problems, authorized by the superior authority, the "center" has the right to sample and re-inspect the products that have been issued with the "Qualification Certificate of Product Inspection”. If product quality problems are found, it shall propose rectification suggestions and revoke the original "Qualification Certificate of Product Inspection". Additional information. MT 113-1995 MT COAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA Replacing MT 113-85 General Test Methods and Judgment Rules for Fire- resistant Antistatic Properties of Polymer Products for Coal Mines Issued on. FEBRUARY 06, 1996 Implemented on. MARCH 01, 1996 Issued by. Ministry of Coal Industry of the People’s Republic of ChinaTable of Contents1 Subject content and scope of application... 3 2 Normative references... 3 3 Terms... 3 4 Fire-resistant properties test methods... 3 5 Surface resistance test methods... 8 6 Judgment rules... 11 7 Inspection and sampling requirements... 12 Additional information... 13 General Test Methods and Judgment Rules for Fire- resistant Antistatic Properties of Polymer Products for Coal Mines1 Subject content and scope of applicationThis Standard specifies the fire-resistant properties, surface resistance test methods, judgment rules, and inspection and sampling requirements of polymer products. This Standard applies to polymer products that can cause prolonged combustion and static sparks in coal mines.2 Normative referencesMT 182, Alcohol blast burner structure and technical requirements3 Terms3.1 Fire-resistant properties It refers to the ability of polymer products to pass the following tests. 3.2 The length flame spread The length of the charred part of the test piece after the flame combustion and flameless combustion of the test piece are extinguished.4 Fire-resistant properties test methods4.1 Alcohol blast burner combustion test method 4.1.1 Test piece Cut 6 test pieces from the sample, each of which is 360 mm long, 50 mm wide, and 5 ~ 10 mm thick. 4.1.2 Instruments and apparatuses a. Blast burner. The blast burner shall meet the requirements of MT 182; the fuel shall be supplied from a container with a graduated tube. The fuel used shall be a mixture (V/V) of 95% ethanol (GB 394) and 5% methanol (GB 338). b. Combustion test chamber. There shall be a machined and sealed matching hole, which serves as the entrance of the blast burner remote control device and the fuel line; the inner surface of the chamber shall be painted black (see Figure 1); the chamber shall be equipped with an adjustable device to ensure that the test piece is in place; a fume hood with an exhaust fan shall be installed on the upper part of the chamber, but it must be premised not to cause changes in flame combustion, otherwise, the fan shall be turned off during the test. c. Stopwatch. The minimum division scale of the stopwatch is 0.01 s. Figure 1 – Schematic diagram of the combustion test chamber 4.1.3 Test procedures 4.1.3.1 The operation and maintenance of the alcohol blast burner shall be 4.1.3.4 Carry out the test in a combustion chamber under low light; ignite the alcohol blast burner; adjust the flame height to 150 ~ 180 mm; the fuel consumption is 2.55 ± 0.15 mL/min. 4.1.3.5 The air flow around the test piece during the test shall be as small as possible, subject to the flame that does not affect the test piece. 4.1.4 Result expression The following test results shall be recorded and calculated. 4.1.4.1 The unit value of the flame combustion time and flameless combustion time of each test piece and drippings; 4.1.4.2 The length flame spread of each test piece; 4.1.4.3 The arithmetic mean of the flame combustion time of 6 test pieces and drippings; 4.1.4.4 The arithmetic mean of the flameless combustion time of 6 test pieces and drippings. 4.2 Alcohol lamp combustion test method 4.2.1 Test piece Cut 6 test pieces from the sample, each of which is 360 mm long, 50 mm wide, and 5 ~ 10 mm thick. 4.2.3.6 The test piece is perpendicular to the door of the combustion chamber, so that both sides of the test piece can be observed. 4.2.4 Result expression The following test results shall be recorded and calculated.5 Surface resistance test methods5.1 Test piece 5.1.1 Cut 3 test pieces from the sample; the size shall not be less than 300 mm × 300 mm, and the thickness shall be 5 ~ 10 mm. 5.1.2 The test piece shall be smooth and free of defects such as cracks, bubbles and mechanical impurities. 5.2 Conductive fluid The composition of the conductive liquid is. (m/m) Anhydrous polyethylene glycol whose molecular weight is 600 4 portions Soft soap 1/200 portions Water 1 portion 5.3 Instruments 5.3.1 Surface resistance tester. The measurement range of the surface resistance tester is 103 ~ 1010 Ω; the accuracy is 1.5; the DC power supply voltage is 50 ~ 500 V; the voltage selection is based on the premise that the power consumption in the test piece is not more than 1 W. 5.4 Determination steps 5.4.1 Determination conditions Test voltage. 500 ± 20 V, 100 ± 10 V, 50 ± 10 V; Test environment. the temperature is 23 ± 2 °C; the relative humidity is (65 ± 5) %. 5.5 Result expression The following determination results shall be recorded and calculated.6 Judgment rules6.1 Fire-resistant properties 6.1.1 Alcohol blast burner combustion test method When testing according to the methods described in this Standard, the following requirements shall be met. 6.1.2 Alcohol lamp combustion test method When testing according to the methods described in this Standard, the following requirements shall be met. 6.2 Surface resistance value Both the arithmetic averages of the surface resistances of the upper and lower surfaces of the test piece shall not be greater than 3×105 Ω.7 Inspection and sampling requirements7.1 The fire-resistant antistatic properties of polymer products for coal mines must be inspected by the Quality Supervision and Inspection Center (hereinafter referred to as the "center") designated by the Ministry of Coal Industry. 7.2 When submitting for inspection, for products that cannot be directly prepared as samples, samples of the same material as the products shall be provided; the sample size is 360 mm × 300 mm, and the thickness is 5 ~ 10 mm. The number of samples is 6 pieces. 7.3 When submitting for inspection, a product type inspection report shall be attached. 7.5 After the validity period of the "Qualification Certificate of Product Inspection" expires, the "center" shall conduct random inspections, and issue a new certificate after the inspection is qualified. 7.6 In response to product quality problems, authorized by the superior authority, the "center" has the right to sample and re-inspect the products that have been issued with the "Qualification Certificate of Product Inspection”. If product quality problems are found, it shall propose rectification suggestions and revoke the original "Qualification Certificate of Product Inspection". Additional 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 MT 113-1995 be delivered?Answer: The full copy PDF of English version of MT 113-1995 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 MT 113-1995_English with my colleagues?Answer: Yes. The purchased PDF of MT 113-1995_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- MT 113-1995 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.Question 5: Should I purchase the latest version MT 113-1995?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version MT 113-1995 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.How to buy and download a true PDF of English version of MT 113-1995?A step-by-step guide to download PDF of MT 113-1995_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "MT 113-1995". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
