GB 16413-1996 Safety performance test specification for glass fiber reinforced plastic products used in underground coal mines
Some standard content:
National Standard of the People's Republic of China
Safety Performance Test Specification for Glass Fiber Reinforced Plastic Products for Coal Mining
1 Subject Content and Scope of Application
GB 16413-1996
This specification specifies the safety performance technical requirements, test methods, inspection rules and markings for glass fiber reinforced plastic products for underground coal mines (hereinafter referred to as "glass fiber reinforced plastic products").
This specification is applicable to glass fiber reinforced plastic products
Contents not covered in this specification must comply with the relevant provisions of the glass fiber reinforced plastic product standards. 2 Names and Terms
Flame retardancy:
It means that when the flame is removed from the test piece, the non-spreading combustion performance of the test piece should meet the requirements of this specification. Antistatic property:
It means that under the specified test conditions, the surface resistance value of the test piece meets the requirements of this specification. 3 Technical requirements
3.1 When the test piece is subjected to the alcohol torch combustion test, after the alcohol torch is removed, the total flame afterburning time of each group of 6 test pieces shall not exceed 30s, and the flame afterburning time of any one of the test pieces shall not exceed 15s. The total flameless afterburning time of each group of 6 test pieces shall not exceed 120s, and the flameless afterburning time of any one of the test pieces shall not exceed 60s. 3.2 When the test piece is subjected to the antistatic test, the resistance values of the upper and lower surfaces of the test piece measured shall not exceed 3×10°2 (based on the arithmetic mean value obtained from the test).
4 Alcohol torch combustion test
4.1 Test method
Place the test piece on the flame of the alcohol torch, remove the torch at the specified time, and measure the flame and flameless afterburning time of the test piece. During the test, the change process of each test piece must be observed at any time until any flame and flameless combustion on the test piece or dripping material is extinguished. 4.1.1 Number and size of test pieces
a. The number of test pieces is 6, each of which is 300mm long, 50mm wide and 3~5mm thick. b. The surface of the test piece must be smooth, free of mechanical damage and impurities. The cutting of the test piece should be at least 50mm away from the edge of the sample. c.
4.1.2 Test apparatus
4.1.2.1 The test apparatus consists of a test box, an alcohol burner, a fuel container and a plastic transparent tube. The test apparatus is shown in Figures 1 and 2. The structural characteristics and dimensional parameters of the alcohol burner should meet the requirements of Figure 3. Approved by the State Bureau of Technical Supervision on June 14, 1996, implemented on February 1, 1997, GB 16413—1996, Figure 1 Schematic diagram of the test chamber, Liquid level line, Plastic pipe, Marking line, Figure 2 Schematic diagram of the burning position of the test piece, 0201~000, GB 16413--1996
Stainless steel mesh
30 mesh/inch
Nozzle hole diameter 0.2
Length 60×.6 brass wire
100-105 pieces
Steel wire mesh 30 mesh/inch
Length 125×.6 brass wire 4 pieces
Figure 3 Schematic diagram of alcohol blowtorch
4.1.2.2 The fuel is a mixture of 95% ethanol and 5% methanol. 4.1.2.3 The accuracy of the stopwatch is not less than 0.2s.
4.1.3 Test steps
4.1.3.1 During the test, the alcohol burner device should be placed in the test box under weak light for testing. The alcohol burner and the test piece detection position should meet the requirements of Figure 2, that is, the test piece should be hung vertically, with its lower end 50mm away from the center of the burner flame outlet, and the alcohol burner tilted 45°. 4.1.3.2 The flame length of the alcohol burner is 150~180mm, and the fuel consumption is 2.55±0.15mL/min. 4.1.3.3 During the test, the air flow around the test piece will not affect the test results. 4.1.3.4 During the test, the liquid level in the fuel container should be within 600±20mm from the alcohol flame outlet (see Figure 2). 4.1.3.5 During the test, the test piece is placed in the flame and burned. The burning time of the test piece is 10s. If it does not burn, continue to heat it, and it will be based on the burning, but the longest time shall not exceed 90s.
4.1.4 Operation and maintenance of alcohol burner
4.1.4.1 Adjust the container to the distance between the fuel level and the bottom of the alcohol burner of 720 ± 20mm. The flame tube of the alcohol burner should be placed vertically. Close the control valve, open the container switch, check whether the fuel is leaking, and then ignite the fuel in the preheating plate to heat the alcohol burner. When the fuel in the preheating plate is consumed by about 50%, open the control valve of the alcohol burner by hand, and wait for the flame to burn stably for about 5 minutes before testing. 4.1.4.2 After the flame is stable, measure the flame temperature to 960 ± 60℃. The flame temperature is measured by a thermocouple or a bare copper wire with a diameter of 0.7mm and a length of about 100mm. When measuring the temperature, keep the thermocouple or bare copper wire 50mm away from the mouth of the alcohol burner. If the bare copper wire does not melt within 6$, the flame temperature should be raised again. 4.1.4.3 When the alcohol torch cannot work normally according to 4.1.4.2, the following steps should be followed: First, check whether the nozzle is blocked. The method is to insert a needle into the nozzle hole first, but prevent the needle from expanding the hole. If this method still does not work, the nozzle can be removed and cleaned, and the blockage can be removed before it is installed and used. b. When the nozzle is checked and it is ineffective, the alcohol torch should be disassembled, the copper wire in the tube should be taken out, the internal debris of the burner should be removed, the copper wire should be cleaned, and it should be reinstalled before use;
If any joint is found to have leakage, it should be sealed in time. 4.1.5 Expression of results
a. The single value and sum of the flame afterburning time of a group of 6 test pieces; b. The single value and sum of the flameless afterburning time of a group of 6 test pieces. 406
5 Antistatic performance test
5.1 Test principle
GB16413—1996
After the test piece is properly treated, a potential difference (DC voltage) is applied between its two areas to measure the leakage current along the surface of the test piece to determine its corresponding resistance value. 5.2 Test pieces and test piece treatment
5.2.1 Test piece size and quantity:
The test piece is a square of 300mm×300mm, with a quantity of 3 pieces. 5.2.2 Appearance quality of the test piece:
The surface of the test piece must be smooth, without mechanical damage and impurities and other defects. 5.2.3 Cleaning of the test piece:
After cleaning the test piece with a clean silk cloth or sterilized gauze dipped in distilled water, wipe the test piece dry with a clean dry cloth and place it in a dry place for more than 24 hours.
5.2.4 Conductive glue (liquid) treatment of the specimen: On the surface of the clean specimen, use conductive glue (liquid) to apply an area as shown in Figure 4, the size of which is equivalent to the size of the electrode base surface. Attention must be paid to the accuracy of the size.
Figure 4 Schematic diagram of electrode size
5.2.5 Normalization of the specimen:
Before the test, place the specimen in an environment with a temperature of (25±5)℃ and a relative humidity of (65±5)% for at least 2 hours. 5.3 Test equipment
5.3.1 Electrode material size:
Use one brass cylinder and one ring as electrodes, the size is shown in Figure 4, the base surface of the inner electrode is circular, the minimum mass is 115g, the base surface of the outer electrode is annular, the minimum mass is 900g, and the base surfaces of the two electrodes should be polished. 5.3.2 Test instrument:
The reading of the resistance measuring instrument is between 103 and 101°α, with an error within ±5%, the DC power supply voltage is 50 to 500V, and the power consumption in the test piece is not more than 1W.
5.4 Test conditions
5.4.1 Test voltage: (500±20)V, (100±10)V, (50±10)V. 5.4.2 Test environment: The temperature is (25±5)℃, and the relative humidity is (65±5)%. 5.5 Test steps
Place the test piece on an insulating flat plate slightly larger than the test piece, with the side with conductive glue (liquid) facing up, wipe the electrode base surface, and place it on the glue (liquid) surface of the test piece. The outer electrode is grounded and connected to the low-voltage terminal of the test instrument, and the inner electrode is connected to the high-voltage terminal of the test instrument. After applying voltage for 1 min, measure the resistance, and then make a similar test on the other side of the test piece. 5.6 Test results
Each test piece is tested once on both the front and back sides, and the test results are expressed as, record the data values measured each time, and calculate the arithmetic average of the upper and lower surface resistances respectively.
6 Inspection rules and signs
6.1 Inspection regulations
The FRP products trial-produced by each unit must be sent to the inspection unit designated by the state for inspection in accordance with the provisions of this specification. For products that have obtained the "Inspection Certificate", other factories must still perform inspection procedures when producing them. 6.2 Batch rules
FRP products should be inspected and accepted in batches, and each batch has the same formula, process, and structure. 6.3 Inspection procedures
The following contents must be provided when submitting for inspection:www.bzxz.net
· A complete test sample;
b. When submitting for inspection, explain the model, product specifications, variety, and material of the test piece; C. Contents of the physical properties test report of the test piece: hardness, aging coefficient, tensile strength, flexural strength, impact strength, etc. 6.4 Issuance of Certificates
After the new product passes the inspection, the inspection unit will issue a "permit to go down the mine", and the industrial test time shall not be less than 3 months. After the industrial test is qualified, the original inspection unit shall review and forward the "Inspection Certificate" for FRP products for underground coal mines before it can be put into production. 6.5 Validity period of inspection certificate
The validity period of the inspection certificate is 2 years. The inspection unit has the right to re-inspect the products that have been issued with the "Inspection Certificate". If it is found that the product does not conform to the original inspection and affects the safety performance, it should make suggestions to the manufacturer and revoke the original "Inspection Certificate" if necessary. 6.6 Procedures for re-inspection after the expiration of the validity period of the inspection certificate The original inspection certificate has After the validity period expires, the manufacturer must go through the procedures to re-inspect, and can only put the product into normal production after obtaining a new inspection certificate.
6.7 Inspection regulations after changes in formula and variety
After the sample is inspected and passed, the inspection unit will issue a "Inspection Certificate". After the formula, process, and structure are changed, it should be sent to the inspection unit for re-inspection.
6.8 Re-inspection and judgment rules
After the test, if one of the tests fails, twice the number of samples can be taken for re-inspection of the unqualified test items. If the re-inspection fails, it will be judged as unqualified.
6.9 Product name and logo
Products that have obtained the inspection certificate must The product name, logo, inspection certificate number, manufacturer, year and month of manufacture, etc. shall be clearly and permanently marked on each product or on the surface of the packaging. Additional notes:
This standard is proposed by the Ministry of Coal Industry of the People's Republic of China: This standard is under the jurisdiction of the Anti-static and Flame Retardant Materials Sub-Technical Committee of the Coal Mine Safety Standardization Technical Committee of the Ministry of Coal. This standard was drafted by the Shanghai Branch of the General Coal Research Institute, Jiangsu Coal Research Institute, Huainan Synthetic Materials Factory, Shanghai Fiberglass Research Institute, and Hebei Wen'an County Anti-corrosion Equipment Factory.
The main drafters of this standard are Cao Xinghua, Tao Jie, Hao Xiangzhao, Tie Baocheng, Zhu Zheng, and Yang Guangshun. This standard is entrusted to the Shanghai Branch of the General Coal Research Institute for interpretation. 1u8
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