Some standard content:
JCS23.040.20:83.140.30
Preparation number: 16782—2005
Coal Industry Standard of the People's Republic of China
MT 141—2005
Generation MT1411986
Plastic mesh false top belt for underground coal mine
Plaslir: nel prolecting top-plane in coal mining2005-09-23 Issued
National Development and Reform Commission
2006-02-01 Implementation
4.4.4.5.4.6.4.7.4.8,4.9 of this standard are mandatory, and the rest are recommended. Ml141-2Cc5
This standard is a revision of MT141-1986 blasting and false roof inspection specification 3. This standard replaces M147198
water standard and MT1419S scan, the main changes are as follows: added control requirements:
increased the flame temperature setting 5.F.3,3; modified the model control point (1S86 edition 11 car version 3): modified the surface screen with conductive layer of the test fence preparation (1586 edition 9.2: this version =.6.-.1); added the fuel consumption of the 1486 edition 5.2.5); cancelled the "rate material The dimensions of mesh belt width and thickness are currently specified (38 edition 3,2.: 2.2.2), and the A recorded in this standard is the normative appendix.
This standard was proposed by the Science and Technology Development Department of China Coal Loading Industry Association, and this standard was signed by the Coal Equipment Industry Coal Safety Standardization Technical Committee. The drafting unit of this standard: Shanghai Branch of China Coal Science and Technology Construction Research Institute. The main contributors to this standard: Yu Qingdan, Zheng Qi, Jiang Liqiang, and Shuai Kailiang. This standard was first issued in July 1966.
Plastic mesh false top belt for underground coal mines
MT141—2005
This standard specifies the product model, specifications, test methods, inspection rules, marking positions and installation and installation of the same plastic mesh false top belt (also known as the false top belt) for underground coal mines. Transportation and storage,
This standard is suitable for the expansion and promotion of plastic nets in the next month, 2 normative reference documents
The clauses in the following documents are reduced to the effective records of this mark through the reference of the international standard, and the referenced documents will be marked with the month after the reference date. All subsequent changes (excluding errors) will be included in the revised version. However, the effectiveness of the relevant standards can be investigated according to the various forces agreed upon by the Tianjin standard. Whether the latest version of these documents is used, any customary documents that are not marked are the latest versions of all ten standards: M119219R Strict precision blowtorch burner is not required on the M3-1!!5 Coal mine underground mining composite products state heat support electrostatic test method and judgment rules multiple false top belt model
Quality belt number control single root break range extension Strength is divided into seven types: 160MS.180M5.2C0M5, 220MS.24GMS, 250MS.3R0MS. The class number is as follows:
4 Requirements
4.1 Appearance
indicates heat resistance
indicates plastic mesh false top belt
indicates single-unit breaking and pulling strength MFa: indicates material
false and special appearance emergency lustre, pattern neat, clear, no obvious pressure, no cracks, damage, perforation, etc. 4.2 Width tolerance bZxz.net
The general width tolerance is _0..\,
4.3 Thickness tolerance
The maximum thickness tolerance is =1,1 r:r. 4.4 Material compression
Weight of false top belt: mm/m
4.5 Single tensile strength
The single tensile strength of false top belt should be not less than 2100N. 4.6 Elongation at break
The single tensile elongation at break of false top belt should be less than 25%, 4.7 Tensile strength
The single cross-section strength of false top belt should meet the requirements of clothing. MT141—2905
Tensile strength
Surface resistance
Table 1 Single section tensile strength
5 tapes, the surface of the two surfaces and the average value is less than 0.10. Flame retardancy
1.9.1 Alcohol torch combustion performance
The type of tape subjected to alcohol torch combustion test shall meet the following requirements: 2fMS
1) After removing the lamp from the center, the arithmetic mean of the total flame retardancy time of the sample shall be less than 10. The single value of the flame retardancy time of any sample shall be less than 10.
The arithmetic mean of the flameless burning time of 5 samples should be less than 11, and the flameless burning time of 3 samples should be less than 3.92 Alcohol lamp combustion performance
The arithmetic mean of the flameless burning time of 6 samples should be less than 6%, and the flame burning time of any sample should be less than 12x.
The arithmetic mean of the flameless burning time of 5 samples should be less than 11, and the flameless burning time of 3 samples should be less than 3. Plastic mesh false pass specification
General specification of plastic mesh false top Appendix A.
5 Test method
5.1 Sample preparation
Take samples 24 hours after the product is manufactured
5.2 Appearance quality
Cut the length of the sample not less than 10m and inspect it visually. 5.3 Specification size inspection
I take! The test compensation can be more than 1, and the monthly drop scale is measured at any 5 points in the parallel force upward. Then take and flatten the 2 digits after the small point, and adjust the number to 1 decimal place. Use a vernier caliper with an accuracy of 0.02mm to measure the thickness of 5 points, and then take their 3 flattened and flattened, and take 3 decimal places, and adjust the number to 1 decimal place. 5.4 Material test noise
54. 1 Sample preparation
Cut, mk test\=%.
5.4.2 Test steps
Put one end of the sample flat, and then press it flat with a transparent plate (or other transparent material) at the same time. As shown in Figure 1, take the number of grids when the deflection of the sample is not less than the value. 5.5 Tensile test
5.5. 1 The group prepared and processed
Cut the length of the belt piece as a sample, and place the sample at the test temperature of (2=5) for 4h5.5.2 Receiver equipment
5.5.2.1 The accuracy of the tensile test machine is 1. Its test range meets the requirements of the measured limit. 5.5.2.2 Meter monitoring: T4 The continuous accuracy is (.0) mm/aim. After the test clamp is built, it is not sheared. 2
5.5.3 Test steps
Copy range
Sex belt
Day 1 skewness determination method schematic
5.5.3.1 The test temperature is (2 515% relative class is 45%--75, MT41-2005
5.5.3.2 The inner ends of the same sample are respectively placed on the two holders of the tensile machine. The longitudinal center line of the test block should be in the same direction as the force direction. 5.5.3.3 The initial gauge length is 1orm, and the pulling speed is (1±>)/min. The maximum tensile force at the time of sample rupture is the single-strand breaking force. The average value of the tensile forces of the test bars is the control breaking force of the subsequent belt (:). 5.5.3.4 When the tensile force increases to the test fracture, the distance between the two gauges is calculated. 5.5.3.5 The test is selected before the fracture occurs, and the test is tested for the test details. See the test details. 5. 5.4 Result Expression
The tensile elongation test results of the false top belt are expressed as follows: 1. The tensile elongation is calculated according to formula (1):
Wherein:
Tensile elongation. Single test rate (mA):
The standard length at break, unit: (mA) 2. Tensile strength control formula:
Wherein:
Hot elongation: unit: MPE):
Tensile breaking length, unit: N)
Test width, unit: mm (mm); Test thickness, unit: 3 m (mm)
Calculate the tensile strength and elongation of each group of 5 specimens, and calculate the average of the minimum elongation at break of the belt or the sample height, and take the integer. 5.6 Surface electrical test
5.6.1 Preparation of test specimens
5.6, 1.1 Connect a certain number of dip-top cards and make a straight and smooth surface-shaped test specimen by hot pressing. The original shape of the test specimen is 11-0., the side length of the test piece shall not be less than 1GGm, the test piece shall be tested with a test piece. If the test piece is coated with a conductive layer, the test piece shall be inserted into a square shape. After the test piece is flat, the surface conductivity test piece can be tested. 5.6.1.2 Clean the test piece with a clean cloth moistened with steam or a disinfected cloth, and then wipe the test piece with a clean cloth for more than 24 hours. During the secondary load test, the test piece shall be placed in a dry place for 7 days before the test. 5.6.1.3 Before the test, the test piece shall be placed in an environment with a temperature of (25 ± 5) and a relative humidity of 60% to 70% for at least 2 hours. 5.6.2 The composition of the conductive liquid (mass percentage) is: 600% anhydrous ethylene;
soft soap:
5, 6. 3-position device
5.6.3.1 Surface quality control method:
The measuring cell is changed from 2 to 0, and the current source range is 50--500V. The voltage selection is based on the premise that the power consumption of the sample is not large.
5.6.3.2 Scale chain:
Use a ring-shaped copper column and a test ring as electrodes. The dimensions are shown in Figure 2. The base of the inner electrode is a special shape, and the outer electrode is a ring. The bases of the two electrodes should be polished and connected to the middle of the test piece with two outer-wrapped insulated shielded wires. 474
Conductor
5.6, 1 test
50 + 1. 1
2 Electrode test schematic
5.6.4.1 Test voltage: (0C+23)V, (10c=.3)V, (5V-0)V. 5.6.4.2 Test environment temperature is (25+5). Relative humidity is in%~?5%. 5.6.5 Risk reduction step
Unit is whole meter
Put the test piece on a piece of insulating flat plate with the same value as the sample, and make sure the middle electrode surface is clean. Put it on the surface, and the electrode and the test piece are conductive or effective. The surface should be the same size as the electrode, flat and smooth. Hard store (A) 1050, body milk! The positive coefficient is not human! 5.6.6 Results
The following measurement results should be recorded and calculated:
2) On each sample, the surface resistance values of the two surfaces are:
h) The arithmetic mean of the upper surface self-resistance:
e) The arithmetic mean of the lower surface resistance
5.7 Alcohol lamp combustion test
5.7.1 Sample preparation
MT 141-2005
The length of the semi-straight items is taken as a group of test items, each test item is 2 m, hanging: at the temperature of the test, the speed is trapped in the air by at least 6°C
5.7.2 Equipment
5.7.2.1 Blowtorch: with the standard of M182-8%, 3% refractory water-alcohol and 55% refractory mixture or pure anhydrous alcohol
5.7.2.2 The combustion test chamber shall comply with the provisions of MT113-154.-.26. 5.7.2.3 Table: The score is 0, (15. 5.7.3 Test Steps
5.7.3.1 The operation of the visual situation light and the ability to reverse according to the provisions of MT182:19A5. 5.3.2 During the test, the agent should be placed with the light and the combat inspection should include 1 requirement, that is, the test push forget to take the place of its lower end or fine spray, the vertical distance from the water piece of the blast hole should be 50mm, the fine item is virtual to make a new special change, Bocheng
Yong Lao %
02 + 009
Unit: mm
New lamp
Figure 3 Sample alcohol sugar burner position diagram 05
5.7.3.3 Method of standard registration is carried out in a weak light combustion box, the alcohol spray can be adjusted to 531H3mm, the fire box temperature at the center of the lamp is 9+: the fire temperature is measured by a wire with a diameter of um and a length of about mm. The wire can meet the temperature requirements of the fire box. When measuring the temperature, the wire is kept at a height of 50mm away from the alcohol spray! The wire can be cut off quickly, then it is reached. Flame temperature, 5.7.3.4 During the test, the air flow through the sample should be minimized to prevent the sample from burning. 5.7.3.5 During the test, the air flow through the sample should be minimized to prevent the sample from burning. The flame temperature should be kept within 1 gram of the lamp mouth (633+) as shown in Figure 3. 5.7.3.6 During the test, place the sample in the test grid and move the sample appropriately to ensure that the position of the test sample and the test sample is kept consistent with the test position shown in Figure 3. 5.7.3.7 The time for the sample to start burning is 55%, the longest time is not good (not easy to choose). The burning time of the same group of 5 test samples is measured. 5.7.3. 8
:
During the test, the starting and maximum burning time of the falling objects on the flat cabinet shall be calculated as the combustion test time of the sample. 5.7.4 Expression of results
Record and calculate the following test results:
MT141--200
: The arithmetic mean of the flaming burning time and the arithmetic mean of the flameless burning time of each sample (1): (the arithmetic mean of the flaming burning time and the flameless burning time specified in the 6 formulas). The average value is taken when burning, and the number is rounded to one decimal point: 5.8 Test lamp combustion test
5.t.1 Sample preparation
Cut the sample strips, each 25cm long, hang them at a certain temperature, and let them stand in the air for at least Eh..
5.5.2 Test strips
5.3.2.: The test set is 25ml of each type of alcohol and the average value is (, The test is completed, the alcohol lamp has a low content of traces of egg whites, the alcohol lamp flame height is 5lrmmr. 5.8.2.2 The test is carried out in the test chamber with the product as the bottom, 5.3.2.3 The fuel is 3.7 analytical pure water and 4.0 analytical pure alcohol. 5.3.2.4 The flame temperature of the alcohol lamp is within the range of 5.8.3 Test efficiency
5.9.3.1. At this time, The vertical distance between the center of the flame end and the lower end of the lamp is 1Sm. 5.5.3.2 When testing cold, the fire will burn the sample for 5 times and the length of the test is 10 times. The same group of test strips will be tested in a consistent manner - the fire will not be reduced. At the same time, the sample and the flameless end burning time are measured at the same time. It is recommended that the flameless and flameless burning time of the sample be calculated within the test time, and the test time should be within the range of 10 seconds. 2.8.3.3 During the test, dripping objects on the wick should be removed in time. After adjusting the flame height, the next test can be carried out. 5.8.4 Result Expression The following test results shall be recorded and calculated: 2) The average of the burning time and the average of the burning time of each or selected single value sample shall be calculated to two decimal places, and the minimum effective point shall be rounded off! 5.9 Test Report The report shall contain the following contents: Name of manufacturer and manufacturer; Product model, specification and production period: Certification period: Test room and relative temperature: e) Test results; Test conclusion; 3) Test.
6 Inspection Rules
5.1 Factory Inspection
e.1.1 The page sections shall be inspected and qualified by the quality inspection department and accompanied by a certificate of qualification before they can be shipped! , H! Inspection items: 6.1.2 Batches and samples
If the same batch is produced continuously, 0kg is taken as a batch and 100000 kg is taken as a standard batch. Samples are engine oil
Table 2 Inspection items
External performance
Elongation at break
Tensile strength
Surface resistance
Frequency lamp combustion test
Fine baking test
" indicates that inspection is to be carried out: "— indicates that no inspection is to be carried out 6. 2 Type inspection
6.2.1 Type inspection should be carried out in any of the following situations: a
New products: Trial formulation and adjustment when the product is transferred to main production; after large-scale production, such as structure, materials, and old products, there are major changes that may affect product performance: During normal production. Should be carried out every? Once a year: When the product is out of production for 2 years and resumes production;
When the factory quality inspection results do not match the last type inspection results, the national quality supervision agency will check if the type inspection results exceed the type inspection requirements. Type inspection items are selected from the qualified products of the factory inspection (see Table 6.2.3) The product sampling method is random sampling, the product sampling base is 200kg and the sampling number is 2kg. 6.3 Judgment rules
6.3.1 Qualified judgment conditions
If any of the following conditions are met, it will be considered qualified: Inspection items:
) Any inspection item will be qualified after double testing on that item. 6. 3. 2 Unqualified judgment conditions
If any of the following conditions are met, it will be considered unqualified:
) Any inspection item will be qualified after double testing on that item. 6. 3. 2 Unqualified judgment conditions
If any of the following conditions are met, it will be considered unqualified:
If any of the following conditions are met, it will be considered unqualified:
If any of the following conditions are met, it will be considered unqualified:
If any of the above inspection items are considered unqualified.
7 Marking, packaging, transportation and storage
7. 1 Marking
7.1.1 Each plastic mesh belt must have a special mark. The marking should include the following:\safety mark\logo and its summary:
1) manufacturer's name:
) production date:
<) width:
MT1412005
MT141-2305
thickness.
Example:
7.2 Packaging
Factory name
Thickness ratio, unit. Net gloss (mm?
Fees, single check high operation: nm
Flammability
Material list and
Tensile strength, single is also afraid of M2)
"Full punctuation" identification and
false position with external packaging use standard package table color packaging material work point clearly indicate the following contents:) "Manufacturer name;
Product name, thermal insulation performance:
Production date, batch number;
d: product title quantity (grams or less) inspection certificate.
7.3 During transportation and unloading, avoid trauma and extrusion. 7.4 The false roof should be stored in a small warehouse to prevent wind and prevent the whole warehouse from being connected. The finished product should be kept for one year from the date of export.
Length range of plastic mesh false roof
.5-25m.
A.2 Range of plastic mesh false roof
80.7--.2m
A.3 Mesh size and size of false material
Appendix A
(Normative Appendix)
General specifications of false material
MT141—2005
Plastic false roof can be hexagonal or parallel hole, the mesh size is 25~-40. The edge seat is tightly tied and solid. The length of a single roof belt cannot exceed 2 meters.
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