SY 0073-1993 Standard for test methods of pipeline anti-corrosion patch materials
Some standard content:
Standard Test Method for Pipeline Conting Patch Materials for Petroleum and Natural Gas Industry of the People's Republic of China
5Y 0073-93
Main unit, China Petroleum and Natural Gas Pipeline Workers' Institute Approval Department, China National Petroleum Corporation Implementation Date, March 1, 2004
Petroleum Industry Press
1998-Beijing
Standard Test Method for Pipeline Conting Patch Materials for Petroleum and Natural Gas Industry of the People's Republic of China
SY 0073-93
Article Explanation
Petroleum Industry Press
1993·Beijing
25 SY/T4081-93 Standard for Quality Inspection of Petroleum Construction Projects Oilfield Steel Measuring Equipment
26 SY4070-9 Specification for Construction and Acceptance of Petroleum and Natural Gas Pipeline Crossing Projects 27SY/T407L-93 Wide Road Downward Jointing Technology The above standards have been in effect since March 1991. China National Petroleum and Natural Gas Corporation
September 9, 1993
Method overview
3 Meaning and application
4 Equipment and operation
5 Electric current and materials
Test steps
8 Notice
Sugar density
Appendix A Pipeline anti-code layer patch material test data table format (12) Appendix Application of interlayer membrane
Additional information period
China National Petroleum and Natural Gas Corporation document
(93) Zhongyoujizi No. 598
Notice on the approval and release of 27 oil and gas industry standards including "Regulations for the Preparation of Oil Surface Engineering Design Documents"
All relevant units have reviewed and approved the 27 draft standards including "Regulations for the Preparation of Oil Station Engineering Design Documents" issued by the Petroleum Professional Standardization Technical Committee, which are now approved as oil weather industry standards. The names of various standards are as follows:
TSY 0009--93
2SY0065
3SY0872--33
4SY 001395
5SY07413
Shipu ground engineering design document preparation specification (instead of SYJ9-83)
Long cell high oil and gas pipeline Xiaorun beautiful standard (instead of SYJ55-83)
Zhidao defense room layer civil protection Ming nuclear profit high test method standard Yingdao group store layer potential sheet material test method international standard pipeline medicine market is the out-of-print consultation sealing method test method standard 8SY/T0076-1 Natural gas degassing design specification 7SY/T0377-91 Natural gas heat energy cooling design standard 8SY/T0528-93
Axis field water permeability management Peach makingbZxz.net
9SY422-43
10SY4025-93
Petroleum construction project quality inspection and environmental assessment standard general purchase (code SYJn40248s)
Petroleum construction project quality design inspection and assessment standard construction project (code SYJn4025--8)
Petroleum construction project quality inspection and assessment standard storage tank project 11SY4026-83
(code SYJn4028-88)
12SY402793
Petroleum construction project quality inspection and assessment standard station Steel process pipeline installation project (recommended SYJn40278
13SY4028--93
Petroleum construction project quality inspection and assessment standard Equipment installation project (recommended SYJn4028-8B)
14SY402998
Petroleum construction project quality inspection and assessment standard Long-distance pipeline line project (replaced SYJn4029--)
15SY4030,[-83 Petroleum construction project quality inspection and assessment standard Electrical engineering (Likong power line project) replaces SYJn4090-88)||tt ||16SY403D,2-99Petroleum construction project quality inspection and assessment standardElectrical engineering (electrical installation engineering)AgencySYJn409088)
17SY4091--93
Petroleum construction project quality inspection and assessment standardAutomation meter installation engineering (AgencySYJm4031-88)18SY4033--93
19SY403493
20SY409593
2SY4037-93
223Y4038-93
23SY 4053-99
Petroleum Construction Project Quality Inspection and Assessment Standards Road Engineering (Replacing SYJn403--88)
Petroleum Construction Project Quality Inspection and Assessment Standards Bridge Engineering (Replacing SYJm4034-88)
Petroleum Construction Project Quality Inspection and Assessment Standards Heating, Ventilation, Water Supply and Drainage Installation Engineering (Replacing SYJn4035-88)
Petroleum Construction Project Quality Inspection and Assessment Standards Refinery Construction Engineering (Replacing SYJ4037-89)
Petroleum Construction Project Quality Inspection and Assessment Standards Gas Field Construction Engineering (Replacing SY4038-92)
Petroleum Construction Project Quality Inspection and Assessment Standards Oilfield Gathering and Transportation Pipeline Engineering (Replacing SY4053-92)
24 SY/T4068-93 Standard for Quality Inspection and Assessment of Petroleum Construction Projects
1 General
1.0.1 This standard provides an accelerated test method for determining the relative sealing performance of anti-corrosion layer patch materials. Pipeline patch materials are used to seal the damaged parts of the anti-corrosion layer on steel pipes. This test method uses small diameter anti-corrosion layer pipes as test pieces, representing the anti-corrosion layer of underwater pipelines. The anti-corrosion layer acts as an electrical insulator between the pipe and the surrounding environment.
1.0.2 In addition to implementing this standard, the test of pipeline anti-corrosion layer patch materials shall also comply with the provisions of the current relevant national standards (specifications). 2 Method Overview
2.0.1 Make an artificial defect hole in the separation layer of the specimen, and then use different materials to repair the damage. The specimen with the patch is suspended in a low-resistivity electrolyte solution, and the specimen is connected to a fast positive plate (or DC power supply). Except for the boundary of the patch, the rest of the test piece in the electrolyte is absolutely sealed, and the boundary of the patch is considered to be the only way to measure the electrolyte. By measuring the dielectric constant of the patch area (the dielectric constant of each patch area is taken as the average of the number of groups once a month in a year), the relative properties of the patch materials can be compared.
3 Significance and Use
3.01 Defects in pipeline corrosion protection can be repaired by seaming or patching. The usability of the patch material depends on its adhesion to the original pipeline anti-corrosion layer. 7.0.2 When using this standard, it must be noted that this test is a relative test for selecting patch materials and cannot be used as a detailed evaluation of the absolute performance of the material. 7.0.3 The test adopts a small-mouth light-layer tube specimen, with the patch patched on the curved radius. It is exposed to the electrolyte in a highly conductive solution, thus providing an accelerated test method. 4 Instruments and Equipment
4.01 Test container: a cylindrical glass container with a diameter of 300mm and a height of about 300mm. 4.0.2 Test acid container cover: a non-conductive plate with a thickness of about 5mm, which can be made of a wood board or plastic board, with a hole with a diameter of 15mm drilled in the center to lead out the wire of the anode or the anode with low consumption rate. At 110mm from the center of the plate, a test piece hanging hole with a diameter of 45mm is connected. 4.0.3 Power supply. The following power supply can be used. 4.0.3.1 A DC power supply is used to maintain a DC potential of 15 ± 0.05 V between the test piece with a small current and the saturated molybdenum/acid steel coil electrode (the zero ratio electrode should be set in the electrolyte during the test), and a material with a low consumption rate is used as the electrode (such as a stainless steel anode or other inert anode) to avoid the salt from being generated on the test piece.
4.0.3.2 A heavy 2.3 kg high purity gold anode is used. The magnesium resistor should have a factory sealed wire, otherwise the end should extend out of the test container cover. The power supply should have a DC open circuit potential of about 1.7 V (relative to the saturated steel/acid steel reference electrode)
Note. If the ground and Gan series electrodes are used as reference electrodes, the potential between the test piece and the reference electrode should be -1.43±0.06V. When the false anode is used, its potential should be close to the reference electrode during the entire test period.
4.0.4 Connecting wire: single-core shielded soft-destructed, wire core diameter greater than 1.03mm4.0.5 Conductivity meter: can measure the range of liquid resistivity from 20 to 400 cm4.0.6 Energy meter: can measure pH value from 0 to 14.4.0.7 Mercury lithium meter: measuring range is 19 to 27°C, accuracy is ±1°C4.0.8 DC microammeter: measuring range is 0.100A and 0.5004A4.0.9 DC voltmeter: internal resistance is not less than 10M0, measuring range is 0.01 to 5.0V5 Electrolyte solution and materials
5.0.1 Electrolyte solution: use distilled water or softened water to prepare a solution containing 1% of nitrogen, sodium carbonate and sodium phosphate.
5.0.2 End sealing material: the end of the test piece can be sealed with asphalt, epoxy resin, synthetic rubber or plastic.
6 Test piece
6.0.1 Test piece: a steel pipe with a diameter of 25mm and a length of about 300mm, with an anti-corrosion coating on the surface of the steel pipe.
6.0.2 Connection wire hole: a hole or threaded hole with a diameter of 5mm is drilled 3mm below the top of the test piece for screw connection of the wire. 6.0.3 Pin hole: a hole with a diameter of 6mm is drilled 20mm below the top of the test piece to pass through the two pads of the pipe, with its axis perpendicular to the connection wire hole. A wooden positioning pin with a diameter of about 5mm is passed through the pin hole, and the test piece is supported on the test cover plate (see Figure 8,0,3).
Wind Yang leads to true color machinery
Main property, am's
Phone program will be ordered to monitor the car
Jiayang Technology Real Union
One use inspection
Blood period without band
Figure 6.0. Anti-mouth figure maintenance sheet material test measurement
Plating positive investment telephone
6.0.4 Artificial defect holes in the anti-corrosion layer Make artificial defect holes on the anti-corrosion layer, with a hole diameter of 13mm and expose the metal surface.
Three artificial defect holes are prepared in a trial, and the three defect holes are located on a vertical line. The drilling positions are shown in Figure 0.
6.0.5 Supplement: The sheet is a square of 25mmX25mm. Make the patch evenly and symmetrically cover the periphery of the artificial defect hole, and make a line at the damaged part to ensure that the minimum overlap width between the patch and the original waterproof layer is 6mm (the distance from the periphery of the artificial defect hole to the midpoint of each side of the patch). When marking, make sure that the upper and lower sides of each patch are in a flat position.
Use sandpaper to lightly roughen the repaired surface of each scratched line, and then perform the repair operation according to the structure and coating process specified in the relevant standards of the patch material, and record the thickness and structure of the patch material.
6.0.6 End seal: The test piece layer should be sealed with a wire material. The sealed test piece skin is conditioned at least 2 hours under room temperature, then immersed in the electrolyte solution, and the test box is tested for the voltage loss. The value should be within A7
7 Test steps
7.0.1 The connection between the anode and the test piece or the DC power supply and the test piece is shown in Figure 6.0.3 and Figure 7.01. During the test piece patch period, when all the test pieces are suspended in the container, pour the electrolyte at room temperature into the container until it is 32mm higher than the top patch. Make a mark at this level. During the entire test, this level is maintained by adding distilled water or softened water.
Direct-flow electric appliances
Figure 7.0.1 Test model for materials for preventing separation of gas and steam electric appliances
-High-voltage positive-current devices
Description board
One-way electric board
Eat low-voltage balls
Solution filter
7.0.2 The test shall be carried out under room conditions of 19~27\C. T.0.3 When a DC power supply is used, each test piece shall be connected to the negative pole of the power supply and the anode to the positive pole of the power supply. Adjust the output voltage of the DC power supply, which shall comply with the provisions of Section 4.0.31 of this standard.
When a magnesium anode is used, lead a 300mm long insulated copper wire from the top screw of the test piece and connect it to the magnesium anode weak lead wire with a wire clamp or a tubular socket. All contacts shall be firm and reliable. Fixed contacts may also be made of pot or copper plates and protected and sealed with insulating materials.
7.0.4 Test: The test period includes the potential between the test piece with the smallest current and the electrolyte solution (relative to the saturated sodium/sodium sulfate reference electrode), the pH, temperature and discharge rate of the electrolyte solution, and the current microampere value of the patch. The test data table format is shown in Appendix A. At the beginning of the test, record the initial data and fill in the "0" serial number column. After that, test once a month, and the date difference should not exceed 2. Continuous test for 12 months.
7.0.6 Test method of patch current
7.0.5.1 Connect a DC microampere meter with a range of 0~100MA between the power supply and the test piece. The reverse connection method is shown in Figure 8.0.3 and Figure 7.0.1. When a test piece can measure a current of 0A or more, remove the test piece from the container (be careful not to touch the edge of the test piece hanging hole), slowly rinse the test piece with softened water or steamed water at room temperature to remove the conductive film, and then slowly reinsert the test piece into the electrolyte. Note the change in current when each patch falls. If there is a difference, then this difference is the required current passing through the patch. 7.0.5.2 When the total current of the test piece exceeds 100MA, if necessary, a DC of 000HA can be used as a table.
7.0.5.3 When the current of a patch exceeds 1004A, it is recorded as 100HA. After measuring the value of 100WA for two consecutive months, remove the patch, clean the patch surface, and seal the patch area firmly with insulating material. The purpose of resealing the patch is to ensure the accuracy of the readings of the remaining patches on the test piece.
8 Report
8.0.1 Fill in the original sensitive data and calculated results as required in the above report 9 Precision
9.0.1 The data precision is limited to the three test pieces with the same material on the original protective layer.
9.0.2 Repeatability: The difference between the average values (except OPA) of three specimens of the same material obtained by the same tester should not be greater than two times, otherwise the test should be repeated. For example, for the same tester, the average value of the first batch of three specimens is 20MA, and the average value of the second batch of three specimens of the same material is required to be between 10-40MA. 9.0.3 Reproducibility The average value (except OPA) of three specimens of the same material obtained from the report of a certain laboratory should not differ from the data obtained by other laboratories by more than one. For example, the average value of a certain laboratory is 20HA, and the average value of the same material in other laboratories is required to be between 760FA. Patch material,
Test container number,
Trial country name
In window protection material
Patch solution class
Electrolyte drop energy depth acid (mm)
Reduction battery electrical overturning liquid
v) pHocmlc
Flat ground electric medicine (A)
Ten-phase electric patch flat foot battery (mountain)
Appendix A Pipeline anti-corrosion layer patch
Pipe anti-separation patch
BV refers to the potential between the current test piece and the power supply (for the ground and the steel/copper coil width ratio plate): the depth of the electrolytic solution refers to the distance from the center of the light surface fast hole, see the medical you, 0., material test data table format
material test data capsule
manufacturer
Appendix B word description
When implementing the provisions of this standard, the word descriptions of strict procedures are as follows, so as to distinguish them in implementation.
1. Indicates that it is very strict and must be done this way: the positive side uses "must be effective",
the negative side uses "strictly prohibited".
2. Indicates that it is strict and should be done this way under normal circumstances. Positive words use "let":
Negative words use "should not" instead of "must not" 3. For permission, there is a slight choice. When conditions permit, it should be used in this way.
Positive words use "may" or "should";
Negative words use "should not".
Additional instructions
Editor-in-chief: China Petroleum and Natural Gas Business and Staff College Main drafters, Min Shihua Chen Jiang
This standard is formulated with reference to ASTMG55-B& (Standard Test Method for Pipeline Anticorrosion Layer Sheet Materials) of the American Society for Testing and Materials.1 Test piece: a steel pipe with a diameter of 25mm and a length of about 300mm, with an anti-corrosion coating on the surface of the steel pipe.
6.0.2 Connection wire hole: a hole or threaded hole with a diameter of 5mm is drilled 3mm below the top of the test piece for screw connection of the wire. 6.0.3 Pin hole: a hole with a diameter of 6mm is drilled 20mm below the top of the test piece, passing through the two pads of the pipe, with its axis perpendicular to the connection wire hole. A wooden positioning pin with a diameter of about 5mm is passed through the pin hole, and the test piece is supported on the test cover plate (see Figure 8,0,3).
Wind Yang leads to true color machinery
Main property, am's
Phone program will be ordered to monitor the car
Jiayang Technology Real Union
One use inspection
Blood period without band
Figure 6.0. Anti-mouth figure maintenance sheet material test measurement
Plating positive investment telephone
6.0.4 Artificial defect holes in the anti-corrosion layer Make artificial defect holes on the anti-corrosion layer, with a hole diameter of 13mm and expose the metal surface.
Three artificial defect holes are prepared in a trial, and the three defect holes are located on a vertical line. The drilling positions are shown in Figure 0.
6.0.5 Supplement: The sheet is a square of 25mmX25mm. Make the patch evenly and symmetrically cover the periphery of the artificial defect hole, and make a line at the damaged part to ensure that the minimum overlap width between the patch and the original waterproof layer is 6mm (the distance from the periphery of the artificial defect hole to the midpoint of each side of the patch). When marking, make sure that the upper and lower sides of each patch are in a flat position.
Use sandpaper to lightly roughen the repaired surface of each scratched line, and then perform the repair operation according to the structure and coating process specified in the relevant standards of the patch material, and record the thickness and structure of the patch material.
6.0.6 End seal: The test piece layer should be sealed with a wire material. The sealed test piece skin is conditioned at least 2 hours under room temperature, then immersed in the electrolyte solution, and the test box is tested for the voltage loss. The value should be within A7
7 Test steps
7.0.1 The connection between the anode and the test piece or the DC power supply and the test piece is shown in Figure 6.0.3 and Figure 7.01. During the test piece patch period, when all the test pieces are suspended in the container, pour the electrolyte at room temperature into the container until it is 32mm higher than the top patch. Make a mark at this level. During the entire test, this level is maintained by adding distilled water or softened water.
Direct-flow electric appliances
Figure 7.0.1 Test model for materials for preventing separation of gas and steam electric appliances
-High-voltage positive-current devices
Description board
One-way electric board
Eat low-voltage balls
Solution filter
7.0.2 The test shall be carried out under room conditions of 19~27\C. T.0.3 When a DC power supply is used, each test piece shall be connected to the negative pole of the power supply and the anode to the positive pole of the power supply. Adjust the output voltage of the DC power supply, which shall comply with the provisions of Section 4.0.31 of this standard.
When a magnesium anode is used, lead a 300mm long insulated copper wire from the top screw of the test piece and connect it to the magnesium anode weak lead wire with a wire clamp or a tubular socket. All contacts shall be firm and reliable. Fixed contacts may also be made of pot or copper plates and protected and sealed with insulating materials.
7.0.4 Test: The test period includes the potential between the test piece with the smallest current and the electrolyte solution (relative to the saturated sodium/sodium sulfate reference electrode), the pH, temperature and discharge rate of the electrolyte solution, and the current microampere value of the patch. The test data table format is shown in Appendix A. At the beginning of the test, record the initial data and fill in the "0" serial number column. After that, test once a month, and the date difference should not exceed 2. Continuous test for 12 months.
7.0.6 Test method of patch current
7.0.5.1 Connect a DC microampere meter with a range of 0~100MA between the power supply and the test piece. The reverse connection method is shown in Figure 8.0.3 and Figure 7.0.1. When a test piece can measure a current of 0A or more, remove the test piece from the container (be careful not to touch the edge of the test piece hanging hole), slowly rinse the test piece with softened water or steamed water at room temperature to remove the conductive film, and then slowly reinsert the test piece into the electrolyte. Note the change in current when each patch falls. If there is a difference, then this difference is the required current passing through the patch. 7.0.5.2 When the total current of the test piece exceeds 100MA, if necessary, a DC of 000HA can be used as a table.
7.0.5.3 When the current of a patch exceeds 1004A, it is recorded as 100HA. After measuring the value of 100WA for two consecutive months, remove the patch, clean the patch surface, and seal the patch area firmly with insulating material. The purpose of resealing the patch is to ensure the accuracy of the readings of the remaining patches on the test piece.
8 Report
8.0.1 Fill in the original sensitive data and calculated results as required in the above report 9 Precision
9.0.1 The data precision is limited to the three test pieces with the same material on the original protective layer.
9.0.2 Repeatability: The difference between the average values (except OPA) of three specimens of the same material obtained by the same tester should not be greater than two times, otherwise the test should be repeated. For example, for the same tester, the average value of the first batch of three specimens is 20MA, and the average value of the second batch of three specimens of the same material is required to be between 10-40MA. 9.0.3 Reproducibility The average value (except OPA) of three specimens of the same material obtained from the report of a certain laboratory should not differ from the data obtained by other laboratories by more than one. For example, the average value of a certain laboratory is 20HA, and the average value of the same material in other laboratories is required to be between 760FA. Patch material,
Test container number,
Trial country name
In window protection material
Patch solution class
Electrolyte drop energy depth acid (mm)
Reduction battery electrical overturning liquid
v) pHocmlc
Flat ground electric medicine (A)
Ten-phase electric patch flat foot battery (mountain)
Appendix A Pipeline anti-corrosion layer patch
Pipe anti-separation patch
BV refers to the potential between the current test piece and the power supply (for the ground and the steel/copper coil width ratio plate): the depth of the electrolytic solution refers to the distance from the center of the light surface fast hole, see the medical you, 0., material test data table format
material test data capsule
manufacturer
Appendix B word description
When implementing the provisions of this standard, the word descriptions of strict procedures are as follows, so as to distinguish them in implementation.
1. Indicates that it is very strict and must be done this way: the positive side uses "must be effective",
the negative side uses "strictly prohibited".
2. Indicates that it is strict and should be done this way under normal circumstances. Positive words use "let":
Negative words use "should not" instead of "must not" 3. For permission, there is a slight choice. When conditions permit, it should be used in this way.
Positive words use "may" or "should";
Negative words use "should not".
Additional instructions
Editor-in-chief: China Petroleum and Natural Gas Business and Staff College Main drafters, Min Shihua Chen Jiang
This standard is formulated with reference to ASTMG55-B& (Standard Test Method for Pipeline Anticorrosion Layer Sheet Materials) of the American Society for Testing and Materials.1 Test piece: a steel pipe with a diameter of 25mm and a length of about 300mm, with an anti-corrosion coating on the surface of the steel pipe.
6.0.2 Connection wire hole: a hole or threaded hole with a diameter of 5mm is drilled 3mm below the top of the test piece for screw connection of the wire. 6.0.3 Pin hole: a hole with a diameter of 6mm is drilled 20mm below the top of the test piece, passing through the two pads of the pipe, with its axis perpendicular to the connection wire hole. A wooden positioning pin with a diameter of about 5mm is passed through the pin hole, and the test piece is supported on the test cover plate (see Figure 8,0,3).
Wind Yang leads to true color machinery
Main property, am's
Phone program will be ordered to monitor the car
Jiayang Technology Real Union
One use inspection
Blood period without band
Figure 6.0. Anti-mouth figure maintenance sheet material test measurement
Plating positive investment telephone
6.0.4 Artificial defect holes in the anti-corrosion layer Make artificial defect holes on the anti-corrosion layer, with a hole diameter of 13mm and expose the metal surface.
Three artificial defect holes are prepared in a trial, and the three defect holes are located on a vertical line. The drilling positions are shown in Figure 0.
6.0.5 Supplement: The sheet is a square of 25mmX25mm. Make the patch evenly and symmetrically cover the periphery of the artificial defect hole, and make a line at the damaged part to ensure that the minimum overlap width between the patch and the original waterproof layer is 6mm (the distance from the periphery of the artificial defect hole to the midpoint of each side of the patch). When marking, make sure that the upper and lower sides of each patch are in a flat position.
Use sandpaper to lightly roughen the repaired surface of each scratched line, and then perform the repair operation according to the structure and coating process specified in the relevant standards of the patch material, and record the thickness and structure of the patch material.
6.0.6 End seal: The test piece layer should be sealed with a wire material. The sealed test piece skin is conditioned at least 2 hours under room temperature, then immersed in the electrolyte solution, and the test box is tested for the voltage loss. The value should be within A7
7 Test steps
7.0.1 The connection between the anode and the test piece or the DC power supply and the test piece is shown in Figure 6.0.3 and Figure 7.01. During the test piece patch period, when all the test pieces are suspended in the container, pour the electrolyte at room temperature into the container until it is 32mm higher than the top patch. Make a mark at this level. During the entire test, this level is maintained by adding distilled water or softened water.
Direct-flow electric appliances
Figure 7.0.1 Test model for materials for preventing separation of gas and steam electric appliances
-High-voltage positive-current devices
Description board
One-way electric board
Eat low-voltage balls
Solution filter
7.0.2 The test shall be carried out under room conditions of 19~27\C. T.0.3 When a DC power supply is used, each test piece shall be connected to the negative pole of the power supply and the anode to the positive pole of the power supply. Adjust the output voltage of the DC power supply, which shall comply with the provisions of Section 4.0.31 of this standard.
When a magnesium anode is used, lead a 300mm long insulated copper wire from the top screw of the test piece and connect it to the magnesium anode weak lead wire with a wire clamp or a tubular socket. All contacts shall be firm and reliable. Fixed contacts may also be made of pot or copper plates and protected and sealed with insulating materials.
7.0.4 Test: The test period includes the potential between the test piece with the smallest current and the electrolyte solution (relative to the saturated sodium/sodium sulfate reference electrode), the pH, temperature and discharge rate of the electrolyte solution, and the current microampere value of the patch. The test data table format is shown in Appendix A. At the beginning of the test, record the initial data and fill in the "0" serial number column. After that, test once a month, and the date difference should not exceed 2. Continuous test for 12 months.
7.0.6 Test method of patch current
7.0.5.1 Connect a DC microampere meter with a range of 0~100MA between the power supply and the test piece. The reverse connection method is shown in Figure 8.0.3 and Figure 7.0.1. When a test piece can measure a current of 0A or more, remove the test piece from the container (be careful not to touch the edge of the test piece hanging hole), slowly rinse the test piece with softened water or steamed water at room temperature to remove the conductive film, and then slowly reinsert the test piece into the electrolyte. Note the change in current when each patch falls. If there is a difference, then this difference is the required current passing through the patch. 7.0.5.2 When the total current of the test piece exceeds 100MA, if necessary, a DC of 000HA can be used as a table.
7.0.5.3 When the current of a patch exceeds 1004A, it is recorded as 100HA. After measuring the value of 100WA for two consecutive months, remove the patch, clean the patch surface, and seal the patch area firmly with insulating material. The purpose of resealing the patch is to ensure the accuracy of the readings of the remaining patches on the test piece.
8 Report
8.0.1 Fill in the original sensitive data and calculated results as required in the above report 9 Precision
9.0.1 The data precision is limited to the three test pieces with the same material on the original protective layer.
9.0.2 Repeatability: The difference between the average values (except OPA) of three specimens of the same material obtained by the same tester should not be greater than two times, otherwise the test should be repeated. For example, for the same tester, the average value of the first batch of three specimens is 20MA, and the average value of the second batch of three specimens of the same material is required to be between 10-40MA. 9.0.3 Reproducibility The average value (except OPA) of three specimens of the same material obtained from the report of a certain laboratory should not differ from the data obtained by other laboratories by more than one. For example, the average value of a certain laboratory is 20HA, and the average value of the same material in other laboratories is required to be between 760FA. Patch material,
Test container number,
Trial country name
In window protection material
Patch solution class
Electrolyte drop energy depth acid (mm)
Reduction battery electrical overturning liquid
v) pHocmlc
Flat ground electric medicine (A)
Ten-phase electric patch flat foot battery (mountain)
Appendix A Pipeline anti-corrosion layer patch
Pipe anti-separation patch
BV refers to the potential between the current test piece and the power supply (for the ground and the steel/copper coil width ratio plate): the depth of the electrolytic solution refers to the distance from the center of the light surface fast hole, see the medical you, 0., material test data table format
material test data capsule
manufacturer
Appendix B word description
When implementing the provisions of this standard, the word descriptions of strict procedures are as follows, so as to distinguish them in implementation.
1. Indicates that it is very strict and must be done this way: the positive side uses "must be effective",
the negative side uses "strictly prohibited".
2. Indicates that it is strict and should be done this way under normal circumstances. Positive words use "let":
Negative words use "should not" instead of "must not" 3. For permission, there is a slight choice. When conditions permit, it should be used in this way.
Positive words use "may" or "should";
Negative words use "should not".
Additional instructions
Editor-in-chief: China Petroleum and Natural Gas Business and Staff College Main drafters, Min Shihua Chen Jiang
This standard is formulated with reference to ASTMG55-B& (Standard Test Method for Pipeline Anticorrosion Layer Sheet Materials) of the American Society for Testing and Materials.5. Patching: The patch is a 25mmX25mm square. Make the patch evenly and symmetrically cover the surroundings of the artificial defect hole, and make a line at the damaged part to ensure that the minimum overlap width between the patch and the original waterproof layer is 6mm (the distance from the periphery of the artificial defect hole to the midpoint of each side of the patch). When marking, make sure that the upper and lower sides of each patch are in a flat position.
Use sandpaper to lightly roughen the repair surface of each scratched line, and then perform the repair operation according to the structure and coating process specified in the relevant standards of the patch material, and record the thickness and structure of the patch material.
6.0.6 End seal: The test piece layer should be sealed with a wire material. The sealed test piece skin is conditioned at least 2 hours under room temperature, then immersed in the electrolyte solution, and the test box is tested for the voltage loss. The value should be within A7
7 Test steps
7.0.1 The connection between the anode and the test piece or the DC power supply and the test piece is shown in Figure 6.0.3 and Figure 7.01. During the test piece patch period, when all the test pieces are suspended in the container, pour the electrolyte at room temperature into the container until it is 32mm higher than the top patch. Make a mark at this level. During the entire test, this level is maintained by adding distilled water or softened water.
Direct-flow electric appliances
Figure 7.0.1 Test model for materials for preventing separation of gas and steam electric appliances
-High-voltage positive-current devices
Description board
One-way electric board
Eat low-voltage balls
Solution filter
7.0.2 The test shall be carried out under room conditions of 19~27\C. T.0.3 When a DC power supply is used, each test piece shall be connected to the negative pole of the power supply and the anode to the positive pole of the power supply. Adjust the output voltage of the DC power supply, which shall comply with the provisions of Section 4.0.31 of this standard.
When a magnesium anode is used, lead a 300mm long insulated copper wire from the top screw of the test piece and connect it to the magnesium anode weak lead wire with a wire clamp or a tubular socket. All contacts shall be firm and reliable. Fixed contacts may also be made of pot or copper plates and protected and sealed with insulating materials.
7.0.4 Test: The test period includes the potential between the test piece with the smallest current and the electrolyte solution (relative to the saturated sodium/sodium sulfate reference electrode), the pH, temperature and discharge rate of the electrolyte solution, and the current microampere value of the patch. The test data table format is shown in Appendix A. At the beginning of the test, record the initial data and fill in the "0" serial number column. After that, test once a month, and the date difference should not exceed 2. Continuous test for 12 months.
7.0.6 Test method of patch current
7.0.5.1 Connect a DC microampere meter with a range of 0~100MA between the power supply and the test piece. The reverse connection method is shown in Figure 8.0.3 and Figure 7.0.1. When a test piece can measure a current of 0A or more, remove the test piece from the container (be careful not to touch the edge of the test piece hanging hole), slowly rinse the test piece with softened water or steamed water at room temperature to remove the conductive film, and then slowly reinsert the test piece into the electrolyte. Note the change in current when each patch falls. If there is a difference, then this difference is the required current passing through the patch. 7.0.5.2 When the total current of the test piece exceeds 100MA, if necessary, a DC of 000HA can be used as a table.
7.0.5.3 When the current of a patch exceeds 1004A, it is recorded as 100HA. After measuring the value of 100WA for two consecutive months, remove the patch, clean the patch surface, and seal the patch area firmly with insulating material. The purpose of resealing the patch is to ensure the accuracy of the readings of the remaining patches on the test piece.
8 Report
8.0.1 Fill in the original sensitive data and calculated results as required in the above report 9 Precision
9.0.1 The data precision is limited to the three test pieces with the same material on the original protective layer.
9.0.2 Repeatability: The difference between the average values (except OPA) of three specimens of the same material obtained by the same tester should not be greater than two times, otherwise the test should be repeated. For example, for the same tester, the average value of the first batch of three specimens is 20MA, and the average value of the second batch of three specimens of the same material is required to be between 10-40MA. 9.0.3 Reproducibility The average value (except OPA) of three specimens of the same material obtained from the report of a certain laboratory should not differ from the data obtained by other laboratories by more than one. For example, the average value of a certain laboratory is 20HA, and the average value of the same material in other laboratories is required to be between 760FA. Patch material,
Test container number,
Trial country name
In window protection material
Patch solution class
Electrolyte drop energy depth acid (mm)
Reduction battery electrical overturning liquid
v) pHocmlc
Flat ground electric medicine (A)
Ten-phase electric patch flat foot battery (mountain)
Appendix A Pipeline anti-corrosion layer patch
Pipe anti-separation patch
BV refers to the potential between the current test piece and the power supply (for the ground and the steel/copper coil width ratio plate): the depth of the electrolytic solution refers to the distance from the center of the light surface fast hole, see the medical you, 0., material test data table format
material test data capsule
manufacturer
Appendix B word description
When implementing the provisions of this standard, the word descriptions of strict procedures are as follows, so as to distinguish them in implementation.
1. Indicates that it is very strict and must be done this way: the positive side uses "must be effective",
the negative side uses "strictly prohibited".
2. Indicates that it is strict and should be done this way under normal circumstances. Positive words use "let":
Negative words use "should not" instead of "must not" 3. For permission, there is a slight choice. When conditions permit, it should be used in this way.
Positive words use "may" or "should";
Negative words use "should not".
Additional instructions
Editor-in-chief: China Petroleum and Natural Gas Business and Staff College Main drafters, Min Shihua Chen Jiang
This standard is formulated with reference to ASTMG55-B& (Standard Test Method for Pipeline Anticorrosion Layer Sheet Materials) of the American Society for Testing and Materials.5. Patching: The patch is a 25mmX25mm square. Make the patch evenly and symmetrically cover the surroundings of the artificial defect hole, and make a line at the damaged part to ensure that the minimum overlap width between the patch and the original waterproof layer is 6mm (the distance from the periphery of the artificial defect hole to the midpoint of each side of the patch). When marking, make sure that the upper and lower sides of each patch are in a flat position.
Use sandpaper to lightly roughen the repair surface of each scratched line, and then perform the repair operation according to the structure and coating process specified in the relevant standards of the patch material, and record the thickness and structure of the patch material.
6.0.6 End seal: The test piece layer should be sealed with a wire material. The sealed test piece skin is conditioned at least 2 hours under room temperature, then immersed in the electrolyte solution, and the test box is tested for the voltage loss. The value should be within A7
7 Test steps
7.0.1 The connection between the anode and the test piece or the DC power supply and the test piece is shown in Figure 6.0.3 and Figure 7.01. During the test piece patch period, when all the test pieces are suspended in the container, pour the electrolyte at room temperature into the container until it is 32mm higher than the top patch. Make a mark at this level. During the entire test, this level is maintained by adding distilled water or softened water.
Direct-flow electric appliances
Figure 7.0.1 Test model for materials for preventing separation of gas and steam electric appliances
-High-voltage positive-current devices
Description board
One-way electric board
Eat low-voltage balls
Solution filter
7.0.2 The test shall be carried out under room conditions of 19~27\C. T.0.3 When a DC power supply is used, each test piece shall be connected to the negative pole of the power supply and the anode to the positive pole of the power supply. Adjust the output voltage of the DC power supply, which shall comply with the provisions of Section 4.0.31 of this standard.
When a magnesium anode is used, lead a 300mm long insulated copper wire from the top screw of the test piece and connect it to the magnesium anode weak lead wire with a wire clamp or a tubular socket. All contacts shall be firm and reliable. Fixed contacts may also be made of pot or copper plates and protected and sealed with insulating materials.
7.0.4 Test: The test period includes the potential between the test piece with the smallest current and the electrolyte solution (relative to the saturated sodium/sodium sulfate reference electrode), the pH, temperature and discharge rate of the electrolyte solution, and the current microampere value of the patch. The test data table format is shown in Appendix A. At the beginning of the test, record the initial data and fill in the "0" serial number column. After that, test once a month, and the date difference should not exceed 2. Continuous test for 12 months.
7.0.6 Test method of patch current
7.0.5.1 Connect a DC microampere meter with a range of 0~100MA between the power supply and the test piece. The reverse connection method is shown in Figure 8.0.3 and Figure 7.0.1. When a test piece can measure a current of 0A or more, remove the test piece from the container (be careful not to touch the edge of the test piece hanging hole), slowly rinse the test piece with softened water or steamed water at room temperature to remove the conductive film, and then slowly reinsert the test piece into the electrolyte. Note the change in current when each patch falls. If there is a difference, then this difference is the required current passing through the patch. 7.0.5.2 When the total current of the test piece exceeds 100MA, if necessary, a DC of 000HA can be used as a table.
7.0.5.3 When the current of a patch exceeds 1004A, it is recorded as 100HA. After measuring the value of 100WA for two consecutive months, remove the patch, clean the patch surface, and seal the patch area firmly with insulating material. The purpose of resealing the patch is to ensure the accuracy of the readings of the remaining patches on the test piece.
8 Report
8.0.1 Fill in the original sensitive data and calculated results as required in the above report 9 Precision
9.0.1 The data precision is limited to the three test pieces with the same material on the original protective layer.
9.0.2 Repeatability: The difference between the average values (except OPA) of three specimens of the same material obtained by the same tester should not be greater than two times, otherwise the test should be repeated. For example, for the same tester, the average value of the first batch of three specimens is 20MA, and the average value of the second batch of three specimens of the same material is required to be between 10-40MA. 9.0.3 Reproducibility The average value (except OPA) of three specimens of the same material obtained from the report of a certain laboratory should not differ from the data obtained by other laboratories by more than one. For example, the average value of a certain laboratory is 20HA, and the average value of the same material in other laboratories is required to be between 760FA. Patch material,
Test container number,
Trial country name
In window protection material
Patch solution class
Electrolyte drop energy depth acid (mm)
Reduction battery electrical overturning liquid
v) pHocmlc
Flat ground electric medicine (A)
Ten-phase electric patch flat foot battery (mountain)
Appendix A Pipeline anti-corrosion layer patch
Pipe anti-separation patch
BV refers to the potential between the current test piece and the power supply (for the ground and the steel/copper coil width ratio plate): the depth of the electrolytic solution refers to the distance from the center of the light surface fast hole, see the medical you, 0., material test data table format
material test data capsule
manufacturer
Appendix B word description
When implementing the provisions of this standard, the word descriptions of strict procedures are as follows, so as to distinguish them in implementation.
1. Indicates that it is very strict and must be done this way: the positive side uses "must be effective",
the negative side uses "strictly prohibited".
2. Indicates that it is strict and should be done this way under normal circumstances. Positive words use "let":
Negative words use "should not" instead of "must not" 3. For permission, there is a slight choice. When conditions permit, it should be used in this way.
Positive words use "may" or "should";
Negative words use "should not".
Additional instructions
Editor-in-chief: China Petroleum and Natural Gas Business and Staff College Main drafters, Min Shihua Chen Jiang
This standard is formulated with reference to ASTMG55-B& (Standard Test Method for Pipeline Anticorrosion Layer Sheet Materials) of the American Society for Testing and Materials.2 When the total current of the test piece exceeds 100MA, if necessary, a DC of 000HA can be used as a meter.
7.0.5.3 When the current of a patch exceeds 1004A, it is recorded as 100HA. After measuring the value of 100WA for two consecutive months, remove the patch, clean the patch surface and firmly seal the patch area with insulating material. The purpose of resealing the patch is to ensure the accuracy of the readings of the remaining patches on the test partner.
8 Report
8.0.1 Fill in the original sensitive data and calculated results as required in the above report 9 Precision
9.0.1 The data precision is limited to 3 test pieces with the same material patched on the original protective layer.
9.0.2 Repeatability: The difference in the common average value (except OPA) of 3 test pieces of the same material obtained by the same tester should not be greater than twice, otherwise the test should be repeated. For example, for the same acid tester, the average value of the first batch of 3 specimens is 20MA, and the average value of the second batch of 3 specimens of the same material is required to be between 10-40MA. 9.0.3 Reproducibility The average value of 3 specimens of the same material reported by a laboratory (except OPA) should not differ from the data obtained by other laboratories by more than 1%. For example, the average value of a laboratory is 20HA, and the average value of the same material in other laboratories is required to be between 760FA. Patch material,
Test container number,
Trial country name
In window protection material
Patch solution class
Electrolyte drop energy depth acid (mm)
Reduction battery electrical overturning liquid
v) pHocmlc
Flat ground electric medicine (A)
Ten-phase electric patch flat foot battery (mountain)
Appendix A Pipeline anti-corrosion layer patch
Pipe anti-separation patch
BV refers to the potential between the current test piece and the power supply (for the ground and the steel/copper coil width ratio plate): the depth of the electrolytic solution refers to the distance from the center of the light surface fast hole, see the medical you, 0., material test data table format
material test data capsule
manufacturer
Appendix B word description
When implementing the provisions of this standard, the word descriptions of strict procedures are as follows, so as to distinguish them in implementation.
1. Indicates that it is very strict and must be done this way: the positive side uses "must be effective",
the negative side uses "strictly prohibited".
2. Indicates that it is strict and should be done this way under normal circumstances. Positive words use "let":
Negative words use "should not" instead of "must not" 3. For permission, there is a slight choice. When conditions permit, it should be used in this way.
Positive words use "may" or "should";
Negative words use "should not".
Additional instructions
Editor-in-chief: China Petroleum and Natural Gas Business and Staff College Main drafters, Min Shihua Chen Jiang
This standard is formulated with reference to ASTMG55-B& (Standard Test Method for Pipeline Anticorrosion Layer Sheet Materials) of the American Society for Testing and Materials.2 When the total current of the test piece exceeds 100MA, if necessary, a DC of 000HA can be used as a meter.
7.0.5.3 When the current of a patch exceeds 1004A, it is recorded as 100HA. After measuring the value of 100WA for two consecutive months, remove the patch, clean the patch surface and firmly seal the patch area with insulating material. The purpose of resealing the patch is to ensure the accuracy of the readings of the remaining patches on the test partner.
8 Report
8.0.1 Fill in the original sensitive data and calculated results as required in the above report 9 Precision
9.0.1 The data precision is limited to 3 test pieces with the same material patched on the original protective layer.
9.0.2 Repeatability: The difference in the common average value (except OPA) of 3 test pieces of the same material obtained by the same tester should not be greater than twice, otherwise the test should be repeated. For example, for the same acid tester, the average value of the first batch of 3 specimens is 20MA, and the average value of the second batch of 3 specimens of the same material is required to be between 10-40MA. 9.0.3 Reproducibility The average value of 3 specimens of the same material reported by a laboratory (except OPA) should not differ from the data obtained by other laboratories by more than 1%. For example, the average value of a laboratory is 20HA, and the average value of the same material in other laboratories is required to be between 760FA. Patch material,
Test container number,
Trial country name
In window protection material
Patch solution class
Electrolyte drop energy depth acid (mm)
Reduction battery electrical overturning liquid
v)pHocmlc
Flat ground electric medicine (A)
Ten-phase electric patch flat foot battery (mountain)
Appendix A Pipeline anti-corrosion layer patch
Pipe anti-separation patch
BV refers to the potential between the current test piece and the power supply (for the ground and the steel/copper coil width ratio plate): the depth of the electrolytic solution refers to the distance from the center of the light surface fast hole, see the medical you, 0., material test data table format
material test data capsule
manufacturer
Appendix B word description
When implementing the provisions of this standard, the word descriptions of strict procedures are as follows, so as to distinguish them in implementation.
1. Indicates that it is very strict and must be done this way: the positive side uses "must be effective",
the negative side uses "strictly prohibited".
2. Indicates that it is strict and should be done this way under normal circumstances. Positive words use "let":
Negative words use "should not" instead of "must not" 3. For permission, there is a slight choice. When conditions permit, it should be used in this way.
Positive words use "may" or "should";
Negative words use "should not".
Additional instructions
Editor-in-chief: China Petroleum and Natural Gas Business and Staff College Main drafters, Min Shihua Chen Jiang
This standard is formulated with reference to ASTMG55-B& (Standard Test Method for Pipeline Anticorrosion Layer Sheet Materials) of the American Society for Testing and Materials.
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