This test method is an accelerated test method that uses a slurry mixed with coarse-grained abrasive and water to determine the relative wear resistance of the pipeline anti-corrosion layer. It is applicable to various types of pipeline insulation anti-corrosion layers. The type of wear suffered by the pipeline anti-corrosion layer in this test method is somewhat different from the type of wear suffered in actual use. SY/T 0065-2000 Test method for wear resistance of pipeline anti-corrosion layer (drum method) SY/T0065-2000 standard download decompression password: www.bzxz.net
This test method is an accelerated test method that uses a slurry mixed with coarse-grained abrasive and water to determine the relative wear resistance of the pipeline anti-corrosion layer. It is applicable to various types of pipeline insulation anti-corrosion layers. The type of wear suffered by the pipeline anti-corrosion layer in this test method is somewhat different from the type of wear suffered in actual use.

1 Scope
Standard of the People's Republic of China for the oil and gas industryTest method for wear resistance of pipeline anticorrosion coating
(Roller method)
Approval department: State Administration of Petroleum and Chemical IndustryApproval date: 2000-12-25
Implementation date: 2001-06-01
SY/T 0065—2000
Replaces SY/T0065--1992
1.1 This test method is an accelerated test method for determining the relative wear resistance of pipeline anticorrosion coating using a slurry mixed with coarse-grained abrasive and water. It is applicable to various types of pipeline insulation anticorrosion coatings
1.2 The type of wear suffered by the pipeline anticorrosion coating in this test method is somewhat different from the type of wear suffered in actual use. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T2478--1996 Brown corundum, a common abrasive GB/T2481.1--1998 Detection and marking of abrasive particle size composition for bonded abrasives Part 1: Coarse abrasive F4~F220 SY/T0063-1999 Test method for leak detection of pipeline anti-corrosion layer SY/T0066-1999 Non-destructive measurement method for thickness of pipeline anti-corrosion layer (magnetic method) 3 Principle
3.1 This method uses a horizontally placed rotating drum with abrasive slurry and test pieces inside. Both ends of the test piece extend out of the drum and are insulated from the drum. When the drum rotates, the slurry in the drum and the test piece produce relative motion, thereby causing wear on the pipeline anti-corrosion layer. 3.2 The relative wear resistance of various anti-corrosion layers can be determined by measuring the resistance value between the test piece and the drum. 3.3 In the research and development of new anti-corrosion coating systems and quality control, wear resistance can be used to determine the optimal anti-corrosion coating thickness of the selected materials. 4 Reagents and materials
4.1 The abrasive is No. 5 brown corundum. The particle size, composition and technical conditions of the abrasive should comply with the relevant provisions of GB/T2478 and GB/T2481.1.
4.2 White water.
5 Equipment and instruments
5.1 Roller: A cylindrical steel container that can test nine specimens at the same time. Its structure is shown in Appendix A (Appendix to the standard). If necessary, its end cap can be modified. A valve must be installed on the roller to release the pressure generated during the test. 5.2 Driving equipment: Equipment that makes the outer wall of the roller rotate at a linear speed of 30.48m/min. 5.3 Magnetic thickness gauge: The technical performance should comply with the relevant provisions of SY/T0066. 5.4 Anti-corrosion layer leak detector: technical performance should comply with the relevant provisions of SY/T0063. 5.5 Ohmmeter: an electrical instrument that can measure the resistance value of this test circuit and is compatible with the test accuracy. 5.6 Tachometer: an instrument that can measure the speed of the drum. 6 Test piece
6.1 The outer diameter of the steel pipe is 21.3mm (nominal diameter 15mm) and the length is 406mm. The metal surface pretreatment and anti-corrosion coating process of the test piece should be the same as those of the industrially produced anti-corrosion layer pipe. The test piece should be free of defects and duplicates should be taken. 6.2 Each test should include a comparison test piece, which can be selected by the user. 7 Test steps
7.1 The test is carried out at a room temperature of 21 to 25°C. 7.2 Before using the test piece, place it at a room temperature of 21 to 25°C for 24 hours. 7.3 Use a magnetic thickness gauge (see 5.3) to measure and record the thickness of the anti-corrosion layer of each test piece. The measurement method shall comply with the relevant provisions of SY/T0066.
7.4 Use a leak detector (see 5.4) to check the test piece for leaks. Only test pieces without defects can be used. The leak detection method shall comply with the relevant provisions of SY/T0063.
7.5 Place the test piece in the drum (see 5.1), and use a rubber ring to keep the test piece concentric with the installation hole, then pour the insulating waterproof wax, and wait for the wax to cool to room temperature before proceeding to the next step. The anti-corrosion layer should not be damaged during the installation of the test piece. 7.6 Place 13.6kg of abrasive (see 4.1) and 5.68L of tap water (see 4.2) in the drum. Before weighing the abrasive, it should be cleaned and dried, and new abrasive should be used for each test.
7.7 After sealing the roller, measure the resistance of each test piece with an ohmmeter (see 5.5). Test pieces with resistance values ​​below infinity should be discarded and replaced.
7.8 Start the drive device (see 5.2). Rotate the roller at a linear speed of 30.48m/min. After each restart of the drive device, measure the speed of the roller with a tachometer (see 5.6). 7.9 The test cycle is 200h.
7.10 Measure the resistance of the test piece every 25h with an ohmmeter (see 5.5). When measuring the resistance of the test piece, the test piece should be immersed in the slurry, and the pressure relief valve should be opened to discharge the pressure in the roller (it is not necessary to open it for the initial measurement). 7.11 After the test, observe and record the surface condition of the anti-corrosion layer, and measure and record the thickness of the anti-corrosion layer. 8 Test report
The test report should include the following contents.
8.1 Complete description of the test piece, including the name and technical standard number of the anti-corrosion layer, the size of the pipe, the production date, the product batch number and other relevant information.
8.2 The start and end dates of the test.
8.3 The average thickness of the anti-corrosion layer of each test piece before the test and the minimum thickness after the test. 8.4 The resistance value of the test piece tested every 25 hours, and record the range and accuracy of the ohmmeter used. 8.5 Description of the surface condition of the anti-corrosion layer after the test. 9 Precision
9.1 The calculation of data precision is limited to two adjacent test pieces taken from the same pipe with the same pipe surface conditions, anti-corrosion layer materials and production processes.
9.2 Repeatability: When the test piece of the same anti-corrosion layer material is tested multiple times, the standard deviation of the test results should not be greater than 1 times the difference between the two adjacent test values. The standard deviation value of the group data refers to the square root of the average of the squares of the differences from their average values. For two or more specimens, the standard deviation of the test results can be calculated using the following formula. = 1/n(En2x?-(2X)*j0.5)
Wherein: ZX is the sum of the measured values ​​of X, including X, to X.; n----the number of measured values; www.bzxz.net
α-standard deviation, the root mean square (rms) of the measured values ​​with respect to their average value. 9.3 Reproducibility: The consistency of the test results between two test laboratories. For the same anti-corrosion layer, the standard deviation of the test results should not be greater than 1.5 times the difference between the inspection values ​​of the two test laboratories. 892
See Figure A1 for the assembly drawing of the rolling element
See Figure A2 for the rolling element.
Rubber pad
Appendix A
(Appendix of the standard)
Drum structure diagram
Test piece insulation sleeve
Waterproof wax
Pipe anti-corrosion layer
Air release valve
Mixed slurry liquid level
Rubber pad
Figure A1 Drum assembly diagram
( 201) 6060
Figure A2 Roller
SY/T 0065—2000
Zhong 127
Zhong 267
SY/T 0065--2000
A3 Test piece insulation sleeve see Figure A3.
A4 Nut see Figure A4.
(Material: Nylon rod)
Test piece insulation sleeve
(Material: A,)
Figure A4 screw
A5 end cap see Figure A5.
A6 cover see Figure A6.
(Material: A:)
Figure A5 end
(Material: A)
Figure A6 cover
SY/T0065—2000
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