This standard specifies the various conditions under which the anti-corrosion layer is exposed to the atmosphere. SY/T 0085-1994 Natural climate exposure test method for pipeline anti-corrosion layer SY/T0085-1994 Standard download decompression password: www.bzxz.net

Standard of the People's Republic of China for the petroleum and natural gas industry Standard of test method for exposure to natural weathering on pipeline protective coating SY/T0085-94 Editing unit: Pipeline Bureau Staff College Approving department: China National Petroleum and Natural Gas Corporation Implementation date: June 1, 1995 Petroleum Industry Press 1995 Beijing 3 Method overview 4 Exposure site 6 Test piece 7 Identification test method 8 Test piece test steps |tt||9 Report
Appendix A Recommended test report
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Appendix B Schematic diagram of exposure rack
Appendix C Explanation of terms used in this regulation
Additional explanation
Appendix Explanation of the test method for self-heating gas recovery of anti-corrosion layer of pipe structure
Document of China National Petroleum Corporation
(94) CNPC Technical Supervision 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 (draft) including "Oilfield Surface Rapid Construction Planning and Design Specifications" have been reviewed and approved and are now approved as oil and gas industry standards and will be released as of today. The numbers and names of the standards are as follows:
Serial number
1SY0049-94
Oilfield surface construction planning and design specifications
2SY/T0083-94 Old oil tank design specifications
3SY/T0084-94
Pipeline anti-glazing layer annular bending performance test force method4SY/T0085-94
Pipeline anti-insulation layer natural climate warm dew test methodSY/T0534-94 High 2 gas with liquid volume test method near-position sampling and collection method
6SY/TO535-94 Fire-type heating furnace thermal and resistance calculation methodS Y/T0541-94 Determination of the freezing point of crude oil
SY/T0542-94 Gas chromatography method for fractionation of stable light hydrocarbonsSY/T0543-94 Sampling method for stable light hydrocarbons
10SY/T7504-94
Gas chromatography method for analysis of n-octane and previous hydrocarbon components in crude oil (Generated SY7504-85)
The above standards shall be implemented from June 1, 1995. China National Petroleum Corporation
December 21, 1994
1 General provisions
1.0.1 This standard is formulated to evaluate the performance of gas exchange and aging of pipe anti-corrosion coatings. 1.0.2 This standard specifies the various conditions for the exposure of the anti-corrosion layer to the atmosphere. 1.0.3 In addition to implementing this standard, the natural climate exposure test of the pipeline fracture layer shall also comply with the provisions of the relevant national standards (specifications) in force. 1.0.4 The standards cited in this standard are: GB3031-83 Test method for natural climate warm exposure of plastics SYI37-89 Test method for cathode separation of pipeline anti-corrosion layer SY0066-92 Method for non-adjustment of pipe thickness (magnetic method SY0067-92 Impact test method for pipeline anti-corrosion coating (limestone drop method) 0063-92 Test method for pipeline delamination leakage detection SYI38-89 Test method for specific bendability of pipeline anticorrosion layer SY/T0084-94 Test method for annular bending performance of pipeline anticorrosion layer (pressure room test)
2 Significance
2.0.1 Pipes with anticorrosion layer may be placed outdoors for a long time before being buried, or may be used on the ground, so it is necessary to conduct natural climate warm dew test using the method to evaluate the anticorrosion layer's resistance to natural climate aging. 3 Method Overview
3.0.1 After 6, 12, and 24 months of exposure, the pipeline anticorrosion layer can be exposed to the exposed and unexposed specimens. Impact and bending tests are carried out, and the aging status of the anti-corrosion layer is compared with visual inspection and inspection results before and after the test. In order to evaluate its resistance to weather aging, the original specimen is monitored by cathode ionization test before the noise exposure test begins. 4 Limited exposure site
4.0.1 The dew absorption site should be selected in accordance with the provisions of Article 3.1.3.2 of GB3681-83. 5 Equipment
5.0.1 The test rack should be suitable for horizontal placement of the specimen. Its manufacturing material is not limited, but it must be pure steel insulation. Its height should be able to prevent the adverse effects of plant growth on the specimen exposure during the test. During the test period, the test rack should be firm and not deformed. . 6 Test
6.0.1 Each test piece should be taken from industrial batch production. It can also be taken from a representative process production batch. The minimum length of the anti-film layer steel pipe with a diameter of 26.8mm (D.20mm) is 4.4m
6.0.2 According to SYJ38, the maximum outer diameter of the steel arm for evaluation is 335mm (D25mm). If it is based on SY/T0084, anti-separation pipes with larger diameters can be evaluated.
6.0.3 A 600mm pipe section should be cut from one end of each original test piece as the "identification test piece: the remaining pipe section is the test piece.
6.0.4 The total number of specimens required for each separation layer test is four, which are distributed as follows: 6.0.4.1 One specimen with 6mo m exposure;
6.0.4.2 One specimen with 12mo m exposure:
6.0.4.3 One specimen with 24mo m exposure:
6.0.4.4 One comparative specimen;
Identification test method
7.0.1 Test each identification specimen according to method B in SYJ37-89 7.0.2 The burst test and the identification test are basically carried out at the same time 7.0.3 If the test results are within the accuracy limit specified in SYJ37. The four specimens are considered valid and the burst test can be carried out, otherwise. The four test partners are invalid and the warm exposure test should be terminated.
8 Test steps for test pieces
8.0.1 The control test piece should be tested as soon as the pipe is received as possible: except that no warm exposure is performed, the test steps in 80.8: 8.0.9.8.0.10 and 8.011 of this chapter shall be followed.
8.0.2 Mark the test pieces with letters, numbers, or symbols for easy analysis after exposure. The markings shall not interfere with exposure and subsequent tests. 8.0.3 Inspect and record the appearance of the test pieces. 8.0.4 Measure and record the thickness of the anti-corrosion layer in accordance with the provisions of SY0066. 8.0.5 Inspect the test pieces in accordance with the provisions of SY0063. 8.0.6 Make two 80mm long scratches on the anti-corrosion layer until the metal is exposed. The first scratch begins about 230mm from one end of the pipe and is 30mm long along the length of the pipe. The second scratch begins about 230mm from the other end of the pipe and is also 80mm long along the length of the pipe. The two scratches are 180% apart along the circumference of the pipe. 80.7 Place the test pieces on a test stand with one scratch facing up and one down. Three test pieces are grouped together with the same test pieces arranged side by side. 8.0.8 After the exposure test, note and record the appearance of the test piece, and check the anti-corrosion layer leakage in the same way as before the exposure; check whether there are cracks, cracks, bubbles, corrosion, delamination and any other forms of anti-corrosion layer damage at the scratched part of the test piece.
80.9 Test the expired test piece in accordance with 8.0.8.8.0.10.8.0.11, and test the other test pieces in the exposure in accordance with 8.0.8.8.0.10 Take a 600mm pipe section from the end of the test piece with the scratch facing downwards and test it in accordance with the provisions of SY0067. When impacting, place the test piece with the scratch facing downwards. 8.0.11 Pipes of different diameters. Test the remaining specimens in accordance with SYJ38 (the side of the specimen with the upward scratches should be placed outside the palm curve) or in accordance with SY/T0084 (the exposed surface should be placed on the curved side)
9 Report
9.0.1 The report should include the following contents
9.0.1.1 Identification test results:
9.01.2 Description of the number of specimens and the anti-corrosion coating system, including: steel pipe surface pretreatment, coating method, anti-skin coating thickness 9.0.1.3 Eyes need to be checked before 9.0.1.4 Appearance of the test piece after de-exposure and during instantaneous exposure and whether the anti-corrosion layer is damaged 9.0.1.5 Indicate the damage to the anti-corrosion layer found by visual inspection as specified in 8.0.8
9.0.1.6 Compare the results of the impact and bending tests on the test piece after strong exposure with the same test results of the control test piece
9.0.1.7 Test environment and climate type of the de-exposure site -9-
10 Accuracy
10.0.1 The test should meet the accuracy requirements of the corresponding standards, and the potential difference between the test piece and the setting test piece should meet the accuracy requirements of the corresponding standards. 0
Appendix Recommended Test Report
A.0.1 Set the test results and fill in the form specified in SYJ37 Issue 1. A.0.2 The format of the test report on outdoor aging of pipeline anti-corrosion layer is as follows 1. Entrusting unit:
Test piece abbreviation:
Manufacturer:
3. Anti-corrosion layer
Anti-separation level:
Application method:
Rust removal paper:
Thickness: Maximum
4. Dew drinking record
Warm fermentation location
Start and end date:
5. Appearance:
Before dew
During dew
After dew:
Test date:
Report date||t t||Steel model:
Batch number:
Production date
Application equipment:
mAverage m
mmMinimum
Climate type
Heat impact resistance test (limestone drop method)
Length (mm)
Test temperature 1C
For parts
Screw-type iron
Test items
Slip voltage (KV)
Number of impacts that appear
7. Specific flexibility test
Length of steel pipe (mm)
Test section ()
Radius of the first occurrence of cracking (mm)
Cracking form
Location of adhesion failure. 8. Annular performance test
Luo Wudao
Pressure transmission rate
min/min
Attached test piece
Comparison test piece
Dew test
Bottom test piecebzxz.net
Pressure volume when defects begin to appear (mm)
A.0.3 The gas protection table format during dew is as follows: Monthly|| tt||refers to the total amount of money
period dispersion
average density
flat density
total amount for one cycle
diagram of bursting rack
Appendix B
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diagram of falling entertainment
Appendix C Explanation of terms used in this regulation
This standard requires the degree of strictness The following are the instructions for use so as to distinguish them in implementation. (1) To indicate that it is strictly necessary to do something: positive words generally use "must be punished", negative words generally use "strictly prohibited": (2) To indicate that it is strict and should be done under normal circumstances: positive words use "should"! Negative words use "should not" or "must not" (3) To indicate that there is a choice, when conditions permit: the first thing to do is to do it: positive words use "should" or "may"; negative words use "should not" Additional instructions
This standard is equivalent to the American Society for Testing and Materials (ASTM) GI-8 "Standard Test Method for Outdoor Aging of Pipeline Anticorrosion Coatings" Editing Unit: Pipeline Bureau Staff College
Main Drafters: Niu Hengcang, Wang Naita, Li Yihua
Natural Climate of Pipeline Anticorrosion Coatings
Exposure Test Method
Clause Explanation
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