SY/T 0084-1994 Test method for annular bending performance of pipeline anticorrosion coating
Some standard content:
Standard of the People's Republic of China for the petroleum and natural gas industry Pipeline anticorrosion coating annular bending
Performance test method
Staundard testnethat ferting hendabilityof pelie coutings
SY/T0084-94
Editor: Pipeline Bureau Staff College
Approving department: China National Petroleum and Natural Gas Corporation Date of implementation: June 1, 1995
: Petroleum Industry Press
1995 Beijing
China National Petroleum and Natural Gas Corporation Document
(94) Zhongdi Jianyu No. 711
Notice on the approval and release of ten oil and gas industry standards including "Oilfield Surface Construction Planning and Design Specifications" To all relevant units:
Ten standards (drafts) including "Oilfield Surface Construction Planning and Design Specifications" have been reviewed and approved. They are now approved as oil and gas industry standards. They can be released. The numbers and names of the standards are as follows:
Serial number
1SY 0049-94
Oilfield surface construction planning and design specifications
SY/T0083-94 Oil removal tank design specifications
SY/T0084-94 SY/T0085-94 Test method for pipeline anti-corrosion layer natural climate noise exposure 5SY/T0534-94 Test method for liquid content in gas of separator Near-position sampling and collection method SY/T0535-4 Calculation method for thermal power and resistance of fire simple heating protection 6 SY/T0541-94 Determination method for freezing point of crude oil 8 SY/T0542-94 Gas chromatography method for analysis of stable light hydrocarbon components 9 SY/T0543-94 Sampling method for stable light hydrocarbon 10 SY/T7504-94 Components of crude oil and above Analytical gas chromatograph (replaces SY7504-35)
The above standard shall be implemented from June 1, 1995. China National Petroleum Corporation
December 21, 1994
1 General test
1.0.1 Coal tar enamel is a widely used anti-corrosion material for protecting ground and submarine pipelines. It has a history of nearly 100 years of use in foreign countries and is considered to be an economical and effective anti-corrosion system, especially the insulating layer structure formed by the supporting use of coal tar enamel and internal and external shrink tapes, which can provide long-term and reliable anti-corrosion protection for pipelines. The development of coal tar enamel in my country started relatively late and is still in the research and development stage. International Standard [SO5266 Steel pipes and fittings for buried steel pipes and pipe fittings for underground pipes - petroleum tar asphalt substrate - internal and external contact layers), BS4164 British Standard Specification for Coal-tar based hot-applied coating materials for protecting steel including U.S. steel and ANSIAWWA C203 WWA Standard Fur Coal-tar Protecting Resin Coating & Surface Treatment for Steel Water Pipes - Enamel andtape—Hot—applied (American National Standards Institute/American Permanent Works Association C203) is the most representative standard, but from the perspective of the requirements for standard formulation in my country, it is still not suitable. This is because ISO5256 stipulates a wide range but lacks some content, including the use temperature of tar materials and certain performance indicators at 60~80℃! BS4164 is only a material specification and lacks content about covering layer and plastic tape: AWWAC203 does not specify indicators for primer, and like ISO5256, it does not specify kerosene enamel with high service temperature. In order to use kerosene enamel correctly, ensure the workmanship quality of the cover and extend the service life. 2 Significance and use
20.1 This method provides evidence for the ability of pipeline anti-separation layer to resist cracking, bends or other mechanical damage caused by pipe bending. If this method is used to inspect commercial pipes, its test results can be used to compare similar materials. When the coating method and the anti-separation layer raw material formulation change and may affect its elongation performance, this method can be used for quality control
3 Method overview
3.0.1 This method can be used with a liquid formal, manual positive adjustment machine, universal material testing machine or other suitable equipment to quickly press the annular specimen coated with the anti-separation layer in the longitudinal direction. When the annular specimen is compressed to a roughly circular shape. The anti-corrosion layer on the metal boundary is made to grow longer, and the bending elongation of the layer is calculated from the dimensions before and after the test. During the test, the test piece is tested to determine whether the coating is sufficient or the adhesion is lost. 3.0.2 Use a dial indicator, caliper or other suitable length measuring instrument to control the length of the test piece, and subtract the dial indicator or caliper number from the original outer diameter to get the outer dimensions of the test piece after production.
4 Equipment and instruments
4.0.1 Compression equipment: equipment that can provide sufficient pressure and control the speed of the pressure head in accordance with Article 704 of this standard, such as manual press machine, universal material testing machine, etc. 4.0.2 Thickness tester: thickness gauge in accordance with the requirements of SY0066 4.0.3 Anti-corrosion layer thickness gauge: high-voltage electric spark gauge or low-voltage explosion-proof sponge detector in accordance with the requirements of SYCH063. When the thickness of the anti-corrosion layer is less than or equal to 0.5mm, use a low-voltage leak detector. When the thickness of the anti-corrosion layer is greater than 0.50mm, use a high-voltage leak detector.
4.0.4 Length measuring instrument: an instrument that can measure the outer diameter, length, thickness and compression distance of the test piece with an accuracy of 0.02mm
5.0.! The test piece shall be a representative annular test piece with a length of 50 + 5 mm. 5.0.2 The test piece shall be cut from a limited pipe section. The test piece may be cut by hand, electric ultrasonic or lathe. Be careful not to damage the separation layer and remove all cutting edges. More pieces may be required according to the test speed.
5.03 Remove a certain amount of the shielding layer on the test piece, see Figure 5.0. For straight pipes: the weld position should be in the middle of the removed shielding layer. For ten-seamed pipes, the weld should also be in the removed part of the shielding layer, and the seams of the five test pieces should be in the same position.
5.0.4 There should be no obvious cracks and defects in the shielding layer on the test piece. 6 Conditioning
6.0.1 When it is required to test at room temperature: the test piece should be placed at room temperature for more than 241 to ensure that it is thermally stable. The room temperature range is 232℃ and the relative humidity is (50±5) %
6.0.2 When testing at other humidity levels, the thermal balance between the specimen and the environment should also be ensured.
7 Test steps
7.0 Use appropriate measuring tools to measure the external weight and barrier of each specimen. 7.0.2 Measure the thickness of the test skin barrier layer according to the requirements of SY00(C) 7.0.3 Place the specimen on the compression device, with the non-protective layer facing the pressure head plane, then apply appropriate force to clamp the specimen and install the displacement measuring instrument. 7.0.4 The displacement of the pressure surface should meet the following requirements: Specimen diameter (mm)
50~200
200-400
400-600
Compression speed (mm/min)
2 ~ 20
60-100
The speed of movement of the compression surface may be determined by any suitable method, such as by dial gauge, caliper, stopwatch.
7.05 During the compression process, the test piece shall be continuously inspected to determine the presence of cracks or flow points in the test piece. Once found, the test shall be stopped immediately and the amount of cracks or flow points that appear shall be noted. Check for loss of strength of the test piece's anti-friction layer caused by bending and deformation of the surface.
The method should not be ignored when there is a possible force limit in the product. The test piece shall be tested at the same time as the test piece. 7.0.6 Measure the compression distance of the test piece using a dial gauge 7.0.7 Subtract the injection box distance from the original pipe diameter of the test piece: use formula (7.0.7) to calculate the extension percentage
X 100 707
Wu Zhongzhong bend diagram extension Shenche
D——Original outer diameter of the fire-retardant pipe, mn
D—Single value of the original outer diameter of the fire-retardant pipe and the shrinkage distance, mm pipe wall number·mm
For the derivation process of the formula, see Appendix A
8 Test report
8.01 The test report should include the following contents
1.1 Complete information of the tested fire-retardant pipe, including the name and type of fire-retardant layer, average thickness, maximum and minimum thickness, production batch number, nominal diameter of the pipe, etc.
8.0.1.2 Construction
K.0.1.3 Protection of test specimens
8.0.1.4 Footprints, wrinkles and elongation and compression of anti-corrosion layer 8.01.5 Description of pain points, cracks and other damages 8.0.1.6 Separation of the pipe from the anti-corrosion room, and any situations that may be anticipated during the test or when the specimen is removed from the test equipment.
8.0.1.8 Observe the compressed test again. The test partner shall store countless 10
9 Precision
9.01 The data required for precision are limited to the adjacent test pieces on the same anti-corrosion layer pipe and assume that the surface condition and material of the anti-corrosion layer are consistent. 9.02 Repeatability - When the same operator uses a repeater to repeat the test on the same batch of test pieces, the error of the measured value shall be within 8% of the average value. 9.0.3 Reproducibility When different operators use different test instruments to test the same batch of test pieces under the same voltage, the difference between the obtained data and the average value shall be within ±15%.
Appendix A Necessary assumptions and formulas for establishing the relationship curve between the radial deformation of the annular test piece and the percentage extension of the anti-corrosion layer AI conditions
AI.! Squeeze the ring in the tool to a finite maximum to make it round. See Figure A1.01
Address: Wu may be a mouse contender: Because the surface is not a beautiful area, the red village period 5 years of the middle school martial arts, think it is really a beautiful garden
Figure A101 Ring generation specimen
A2 Assume
fan ring generation
42.0! When the ring specimen is pressed by a finite amount in the parallel plane, the radius of curvature of this part of the specimen is smaller than that of the original ring, and the radius of the small part is very close to the radius of the ideal mouth, so it can be assumed to be equivalent to a part of the ideal limit 42.0.2 When a part of the ring specimen is deformed to become a part of the small radius ring. Assume that the surface of this part of the ring is uniformly long A203 if the original ring surface is covered by a protective glass layer. And being pulled, the bonding film feeling is not only longer: the new bonding area is definitely smaller than the initial bonding area, therefore, the bonding surface is naturally reduced, only when the anti-corrosion layer here stands, it can move with the elongation of the surface.
A2.0.4 Regardless of the axial length or circumferential length of the pipe surface, its anti-separation bonding performance is consistent
42.0.5 When the ring specimen is squeezed, its friction is not any more. The above quantity is assumed to be reliable. It can be calculated by the product. According to the design at the time of standing, the direct stock measurement and the standard car dealership A3 formula are derived
Figure A3.0.1-1 Large ring
A3.0.1 In Figure A3.01-1 || tt||0m（D-)
Where D——original outer diameter, mmi
Ring thickness: mm
Figure A301-2 cup
(A.3.0.12)
(——the angle on the large ring (measured in parts of 360"); h is the length relative to the center line of the 0-angle tube, mm
4—corresponding to the outer surface length of the Y-angle tube, mm
A3.2 in Figure A3.0.1-2
Note: The center length of the tube is the center length of the tube = n(DA302-)
A312-2
North D-original outer diameter average compression moment standard value: — wall thickness of the small ring (same as the large ring), mn5——small ring The angle on the pipe (measured in 360° parts) is the length of the pipe wall centerline corresponding to the angle 5, mm - the arc length of the outer surface corresponding to the central angle 0. mmA3.0.3 Select any angle, which is within the angle corresponding to the isolation layer. The value of 5 can be calculated according to the value: 0-45/3600.0125ch/303-1)
n(Dt)D-)A303-2
From 0=0.0125, it is obtained that
=00125-
wherein - the length of the extended pipe, mm
including P as the extension half, purchase
4A303-3
mA303-4
mugA103-5||tt| |0.0125(D)
FD-00125
X100（A303-6)
Xtuuan
This formula is the expression for calculating the appropriate elongation. A30
Let, when the value is selected, the batch formula is not applicable to the special formula of the product. The outer ring light sales process is empty.
43.0.4 The relationship between the extension and the ring shape is established: In the formula (A.:.0.3-7):! For the carrier, D is the original outer shape. After the deformation value of the ring is given, the formula (A3.0.3-7) can be used to calculate the elongation percentage, and then this method can be used to continuously obtain any number of points required for drawing the calibration curve. 3
E BFSeEI
Flower pain products
Appendix C Explanation of the use of this standard
When implementing the provisions of this standard, the words that require strict vigilance are explained as follows, so as to distinguish the opposite during implementation
(1) Words that indicate that it is very strict and must be done: positive words use "must"; negative words use "strictly prohibited"
(2) Words that indicate strict. Under normal circumstances, this is done: positive words use "should not"; negative words use "shall not" or "shall not"(3) Words that indicate that there is a slight choice allowed. When permitted by the clause, the positive word should be used first: negative word should not be used -17
Additional instructions
This standard is equivalent to the American Society for Testing and Materials (ASTM) G70-87 "Standard Test Method for Annular Bending Performance of Pipeline Anti-corrosion Layer (Compressed Test) Editing Unit: Pipeline Bureau Staff College
Main Drafters: Cheng Xuelan, Sun Bianfen, Feng Hongchen 1
Annular Bending Performance of Pipeline Anti-corrosion Layer
Test Method
Article Explanation0! When the annular specimen is pressed by a finite amount in the parallel plane, the radius of curvature of this part of the specimen is smaller than that of the original ring. The radius of the small part is very close to the radius of the ideal opening, so it can be assumed to be equivalent to a part of the ideal limit. 42.0.2 When a part of the annular specimen is deformed to become a part of the small radius ring. If the original ring surface is covered by a protective glass layer, the surface of this part of the ring is assumed to be uniformly long. And being pulled, the bonding film feeling is not only longer: the new bonding area is definitely smaller than the initial bonding area, therefore, the bonding surface is naturally reduced, only when the anti-corrosion layer here stands, it can move with the elongation of the surface.
A2.0.4 Regardless of the axial length or circumferential length of the pipe surface, its anti-separation bonding performance is consistent
42.0.5 When the ring specimen is squeezed, its friction is not any more. The above quantity is assumed to be reliable. It can be calculated by the product. According to the design at the time of standing, the direct stock measurement and the standard car dealership A3 formula are derived
Figure A3.0.1-1 Large ring
A3.0.1 In Figure A3.01-1 || tt||0m（D-)
Where D——original outer diameter, mmi
Ring thickness: mm
Figure A301-2 cup
(A.3.0.12)
(——the angle on the large ring (measured in parts of 360"); h is the length relative to the center line of the 0-angle tube, mm
4—corresponding to the outer surface length of the Y-angle tube, mm
A3.2 in Figure A3.0.1-2
Note: The center length of the tube is the center length of the tube = n(DA302-)
A312-2
North D-original outer diameter average compression moment standard value: — wall thickness of the small ring (same as the large ring), mn5——small ring The angle on the pipe (measured in 360° parts) is the length of the pipe wall centerline corresponding to the angle 5, mm - the arc length of the outer surface corresponding to the central angle 0. mmA3.0.3 Select any angle, which is within the angle corresponding to the isolation layer. The value of 5 can be calculated according to the value: 0-45/3600.0125ch/303-1)
n(Dt)D-)A303-2
From 0=0.0125, it is obtained that
=00125-
wherein - the length of the extended pipe, mm
including P as the extension half, purchase
4A303-3
mA303-4
mugA103-5||tt| |0.0125(D)
FD-00125
X100（A303-6)
Xtuuan
This formula is the expression for calculating the appropriate elongation. A30
Let, when the value is selected, the batch formula is not applicable to the special formula of the product. The outer ring light sales process is empty.
43.0.4 The relationship between the extension and the ring shape is established: In the formula (A.:.0.3-7):! For the carrier, D is the original outer shape. After the deformation value of the ring is given, the formula (A3.0.3-7) can be used to calculate the elongation percentage, and then this method can be used to continuously obtain any number of points required for drawing the calibration curve. 3
E BFSeEI
Flower pain products
Appendix C Explanation of the use of this standard
When implementing the provisions of this standard, the words that require strict vigilance are explained as follows, so as to distinguish the opposite during implementation
(1) Words that indicate that it is very strict and must be done: positive words use "must"; negative words use "strictly prohibited"
(2) Words that indicate strict. Under normal circumstances, this is done: positive words use "should not"; negative words use "shall not" or "shall not"(3) Words that indicate that there is a slight choice allowed. When permitted by the clause, the positive word should be used first: negative word should not be used -17
Additional instructions
This standard is equivalent to the American Society for Testing and Materials (ASTM) G70-87 "Standard Test Method for Annular Bending Performance of Pipeline Anti-corrosion Layer (Compressed Test) Editing Unit: Pipeline Bureau Staff College
Main Drafters: Cheng Xuelan, Sun Bianfen, Feng Hongchen 1
Annular Bending Performance of Pipeline Anti-corrosion Layer
Test Method
Article Explanation0! When the annular specimen is pressed by a finite amount in the parallel plane, the radius of curvature of this part of the specimen is smaller than that of the original ring. The radius of the small part is very close to the radius of the ideal opening, so it can be assumed to be equivalent to a part of the ideal limit. 42.0.2 When a part of the annular specimen is deformed to become a part of the small radius ring. If the original ring surface is covered by a protective glass layer, the surface of this part of the ring is assumed to be uniformly long. And being pulled, the bonding film feeling is not only longer: the new bonding area is definitely smaller than the initial bonding area, therefore, the bonding surface is naturally reduced, only when the anti-corrosion layer here stands, it can move with the elongation of the surface.
A2.0.4 Regardless of the axial length or circumferential length of the pipe surface, its anti-separation bonding performance is consistent
42.0.5 When the ring specimen is squeezed, its friction is not any more. The above quantity is assumed to be reliable. It can be calculated by the product. According to the design at the time of standing, the direct stock measurement and the standard car dealership A3 formula are derived
Figure A3.0.1-1 Large ring
A3.0.1 In Figure A3.01-1 || tt||0m（D-)
Where D——original outer diameter, mmi
Ring thickness: mm
Figure A301-2 cup
(A.3.0.12)
(——the angle on the large ring (measured in parts of 360"); h is the length relative to the center line of the 0-angle tube, mm
4—corresponding to the outer surface length of the Y-angle tube, mm
A3.2 in Figure A3.0.1-2
Note: The center length of the tube is the center length of the tube = n(DA302-)
A312-2
North D-original outer diameter average compression moment standard value: — wall thickness of the small ring (same as the large ring), mn5——small ring The angle on the pipe (measured in 360° parts) is the length of the pipe wall centerline corresponding to the angle 5, mm - the arc length of the outer surface corresponding to the central angle 0. mmA3.0.3 Select any angle, which is within the angle corresponding to the isolation layer. The value of 5 can be calculated according to the value: 0-45/3600.0125ch/303-1)
n(Dt)D-)A303-2
From 0=0.0125, it is obtained that
=00125-
wherein - the length of the extended pipe, mm
including P as the extension half, purchase
4A303-3
mA303-4
mugA103-5||tt| |0.0125(D)
FD-00125
X100（A303-6)wwW.bzxz.Net
Xtuuan
This formula is the expression for calculating the appropriate elongation. A30
Let, when the value is selected, the batch formula is not applicable to the special formula of the product. The outer ring light sales process is empty.
43.0.4 The relationship between the extension and the ring shape is established: In the formula (A.:.0.3-7):! For the carrier, D is the original outer shape. After the deformation value of the ring is given, the formula (A3.0.3-7) can be used to calculate the elongation percentage, and then this method can be used to continuously obtain any number of points required for drawing the calibration curve. 3
E BFSeEI
Flower pain products
Appendix C Explanation of the use of this standard
When implementing the provisions of this standard, the words that require strict vigilance are explained as follows, so as to distinguish the opposite during implementation
(1) Words that indicate that it is very strict and must be done: positive words use "must"; negative words use "strictly prohibited"
(2) Words that indicate strict. Under normal circumstances, this is done: positive words use "should not"; negative words use "shall not" or "shall not"(3) Words that indicate that there is a slight choice allowed. When permitted by the clause, the positive word should be used first: negative word should not be used -17
Additional instructions
This standard is equivalent to the American Society for Testing and Materials (ASTM) G70-87 "Standard Test Method for Annular Bending Performance of Pipeline Anti-corrosion Layer (Compressed Test) Editing Unit: Pipeline Bureau Staff College
Main Drafters: Cheng Xuelan, Sun Bianfen, Feng Hongchen 1
Annular Bending Performance of Pipeline Anti-corrosion Layer
Test Method
Article Explanation
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