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MT 191-1989 English PDF

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US$239.00 · In stock
Delivery: <= 2 days. True-PDF full-copy in English will be manually translated and delivered via email.
MT 191-1989: Rubber tube used in coal mine underground safety performance test standard
Status: Obsolete

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
MT 191-1989	239	Add to Cart	2 days	Rubber tube used in coal mine underground safety performance test standard	Obsolete

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Basic data

Standard ID: MT 191-1989 (MT191-1989)
Description (Translated English): Rubber tube used in coal mine underground safety performance test standard
Sector / Industry: Coal Industry Standard
Classification of Chinese Standard: G42
Word Count Estimation: 6,665
Date of Issue: 3/31/1989
Date of Implementation: 4/1/1989
Quoted Standard: MT 181; MT 182
Regulation (derived from): Development-Reform-Office-Industry (2006) 97
Summary: This standard specifies the flame retardant properties of the coal mine with a rubber tube, conducting performance requirements and test methods, inspection procedures and signs. This standard applies to coal mine transport liquid, gas, materials with a rubber tube products. The contents of this standard are not covered should be consistent with the relevant standards. The standard reference a "test burn rubber and plastic pipes underground mining methods with the" international standard ISO/DIS8030.

MT19:

---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.
Rubber tube used in coal mine underground safety performance test standard

1 Topic content and scope of application 1 2 Normative references 1 3 Technical requirements 1 4 Alcohol torch flame burning test 1 5 Conductivity test 3 6 Test report content 3 7 Inspection procedure 3 8 sign 3 MT/T 191-89 Ministry of Energy Standards Specification for safety performance inspection of rubber pipes used in coal mines Ministry of Energy of the People's Republic of China 1989-03-31 ratified 1989-04-01 implementation

1 Topic content and scope

This standard specifies the flame retardancy, conductivity requirements and test methods, inspection procedures and signs of rubber pipes used in coal mines. This standard applies to rubber pipe products used for the transportation of liquids, gases and materials in coal mines. The content not covered by this standard shall meet the requirements of relevant standards. This standard refers to the international standard ISO /DIS8030 "Combustion test methods for rubber and plastic pipes used in underground mining".

2 Reference standards

MT 181 Safety Performance Inspection Specification for Plastic Pipe Used in Coal Mine Structure and technical requirements of MT 182 alcohol torch burner

3 Technical requirements

3.1 Flame retardant performance requirements When the test pieces are subjected to the flame burning test according to this specification, after the alcohol torch burner is removed, the flame and Mars burning time of each group of 6 test pieces The arithmetic mean must not be greater than 30s. 3.2 Requirements for Electrical Conductivity (Specification of Surface Resistance Value) When the test piece is tested for electrical conductivity according to this specification, the inner and outer wall surfaces of the test piece are tested for rubber pipes for various uses in coal mines. The resistance value must meet. a. Pipes for drainage and water supply. The surface resistance value of the outer wall of the pipe must not be greater than 1 × 109Ω. b. Positive pressure air duct. The surface resistance value of the outer wall of the duct must not be greater than 1 × 108Ω. c. Grouting tube. the surface resistance value of the inner and outer walls of the tube shall not be greater than 1 × 108Ω. d. Downhole hydraulic pipe. The surface resistance value of the inner and outer walls of the pipe must not be greater than 1 × 108Ω. e. Negative pressure air pipe and exhaust gas pipe. The surface resistance of the inner and outer walls of the pipe must not be greater than 1 × 106Ω.

4 Alcohol torch flame burning test

4.1 Test principle Place the test piece on the flame of the alcohol torch burner, and burn it according to the prescribed time. Then remove the alcohol torch burner and measure the test piece. Flame and Mars burning time, the change of each test piece should be observed at any time during the test, until any of the test piece or the drop The flame or Mars burns out. 4.2 Test device 4.2.1 Fuel enters the alcohol torch from the alcohol container through the transparent plastic hose, and the test device should be placed in the test chamber (see Figure 1). In order to keep the test under weak light, the test device is shown in Figure 2. 4.2.2 The fuel shall meet the requirements of Article 3.2.2 of MT 181. 4.2.3 The chronograph shall comply with the provisions of Article 3.2.3 of MT 181. 4.3 Test specimen preparation a. Test specimens shall be arbitrarily cut from the product, and the length of each specimen is 305mm; b. The number of test pieces is 6. 4.4 Test method 4.4.1 During the test, the relative position of the bottom of the alcohol torch burner and the test piece shall meet the requirements of Figure 2, that is, the test piece shall be held horizontally, The distance between the burners of the alcohol torch is 50mm, and the base of the burner of the alcohol torch is 45 ° from the horizontal direction. 4.4.2 The flame length, flame temperature and fuel consumption of alcohol torches shall comply with the provisions of 3.4.2 of MT 181. 4.4.3 The height of the liquid surface in the fuel container shall comply with the provisions of 3.4.3 of MT 181. 4.4.4 During the test, the test piece is burned in a flame, and the burning time is 60s. 4.4.5 The air flow in the test chamber should not affect the test results during the test. 4.5 Operation of alcohol torch burner The operation of the alcohol torch burner shall comply with the provisions in MT 182.

5 Conductivity test

The conductivity test shall comply with the provisions in Chapter 4 of MT 181.

6 Test report content

a. Material identification should include product variety, specifications, materials, models, manufacturing dates, etc .; b. test environment; c. Test results.

7 Inspection procedures

7.1 Coal companies and coal mines shall not purchase without authorization the inspection unit designated by the Ministry of Energy (National Coal Shearer, Belt Conveyor Quality Supervision) The supervision and inspection center (hereinafter referred to as the quality inspection center) inspects the rubber tubes that pass the test according to this standard. 7.2 Each manufacturer shall apply to the inspection unit (Quality Inspection Center) designated by the Ministry of Energy for the inspection of underground coal mines with the letter of introduction from the superior department in charge. After the rubber pipe and rubber pipe have passed the random inspection and approval, the inspection unit shall issue a downhole industrial test license or inspection certificate. The inspection certificate is valid for 2 years. 7.3 Each coal mining unit may entrust the designated inspection unit (Quality Inspection Center) of the Ministry of Energy to review the rubber pipes for underground coal mines that it has purchased or intends to purchase. 7.4 The inspection unit (Quality Inspection Center) designated by the Ministry of Energy has the right to conduct spot checks and review at any time on products that have been issued with inspection certificates. 7.5 If it is found during the sampling inspection that it is inconsistent with the original inspection product and affects the safety performance, the inspection unit shall propose to the manufacturing unit, if necessary, Cancel the original inspection certificate. 7.6 After approval of qualified products, if there are changes in the formula and variety compared with the original identified products, a new application for inspection shall be submitted. 7.7 After the expiration of the original inspection certificate, the manufacturer must still perform the procedures to resend the inspection. After the new inspection certificate is obtained, normal production of the product can be carried out. 7.8 When submitting for inspection, indicate the model, specification, variety, material and manufacturing time of the product. 7.9 The manufacturer shall inspect each batch of products (the weight of each batch shall not exceed 2t) according to the requirements of this specification. The products required by Fan are not allowed to be used in coal mines.

8 signs

For products that have obtained the inspection certificate, each package should have the product name, model, inspection certificate number, year and month of manufacture, and name of the manufacturer. Trademarks and other signs. Additional information. This standard has been proposed by China Uniform Coal Mine Corporation Technology Development. This standard was drafted by the Shanghai Research Institute of Coal Science and Technology. The main drafters of this standard are Gao Hong, Wang Wenzhao, and Li Guowei. This standard is entrusted to the Shanghai Branch of the China Coal Research Institute and is responsible for interpretation. This standard takes effect immediately from the date of approval. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of MT 191-1989_English be delivered?

Answer: Upon your order, we will start to translate MT 191-1989_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 2 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of MT 191-1989_English with my colleagues?

Answer: Yes. The purchased PDF of MT 191-1989_English will be deemed to be sold to your employer/organization who actually pays 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+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.