SY/T 6508-2000 Nondestructive testing methods for oil well pipes - Non-ferromagnetic thread penetrant testing
Some standard content:
1C875.180.10;77.040.20
E 92: H 26
Registration No.: 8208—2001
Petroleum and Natural Gas Industry Standard of the People's Republic of ChinaSY/T 65082000
Nondestructive testing method for OCTG Liquidpenetrant flaw detection for nonferrous magnetic thread2000-12-25 Issued
State Administration of Petroleum and Chemical Industry
2001-06-01Implementation
SY/T 6508—2000
This standard is one of the series of standards for nondestructive testing methods for oil well pipes: this series of standards also includes: SY/T5446-92, SY/T5447—92SY/T5448—92 and other standards. The purpose of this standard is to provide general technical criteria and methods for the thread flaw detection of non-ferromagnetic oil and pipes used in the petroleum industry. Various nondestructive testing methods complement each other. Therefore, in order to ensure the accuracy of the test results, other nondestructive testing methods can also be used for confirmation.
Appendix A of this standard is the appendix of the standard.
This standard was proposed by China National Petroleum Corporation: This standard is under the jurisdiction of the Oil Pipe Standardization Committee and drafted by the Oil Pipe Research Institute. The main drafters of this standard are Fang Wei and Ximin.
1 Scope
Petroleum and Natural Gas Industry Standard of the People's Republic of China Nondestructive testing method for OCI'G Liquidpenetrant flaw detectinn for nonferrous magnetic threadSY/F 6508—2000
This standard specifies the operator requirements, flaw detection force method, flaw detection agents and equipment, flaw detection sensitivity and calibration, and flaw detection procedures for nonferrous magnetic oil pipe threads. This standard applies to the penetration testing of non-ferromagnetic oil well pipe threads to find surface opening defects such as fatigue cracks in the threaded parts. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard: When this standard is difficult to publish, the versions shown are valid. All standards will be revised. Parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T 5097-1985 Indirect evaluation method of black light source 3 Operator requirements
3.1 Operators must hold a technical qualification certificate for inspectors issued by relevant national authorities and suitable for their work. 3.2 The operator's close-range corrected vision must be above 1.0, and the color discrimination ability should be able to distinguish the color contrast related to the penetration testing method.
4 NDT methods
+.1 Classification
4.1.1 Penetrant testing is divided into the following categories according to the type of dye contained in the penetrant used: 1) light penetrant testing; 2) colorimetric penetrant testing; 3) fluorescent coloring (dual-purpose) penetrant testing; 4.1.2 Penetrant testing is divided into the following categories according to the penetrant removal method: 3) water washing penetrant testing; 4) lipophilic post-emulsification penetrant testing; 5) solvent removal penetrant testing; 6) hydrophilic post-emulsification penetrant testing.
4.1.3 Penetrant testing is divided into the following types according to the type of imaging: a) Powder imaging:
b) Water-soluble wet imaging;
) Water-suspended condensate imaging;
d) Non-water wet imaging;
) Special imaging;
Approved by the State Administration of Petroleum and Chemical Industry on 2-12-25, implemented on 2001-06-01
f) Self-imaging.
4.2 Methods
SY/T6508--2000
According to the service environment of non-ferromagnetic oil well pipes, water-washing type, solvent removal type fluorescent penetrant testing method and dye penetrant testing method are used to perform penetrant testing on the threads of non-ferromagnetic oil well pipes. 4.3 Process
4.3.1 The process flow of water-washing type fluorescent penetrant testing and water-washing type dye penetrant testing is shown in Figure 1. Pre-cleaning
Dry powder development
Water-based wet development
Removal of developer
Non-aqueous wet development
Figure 4.3.2 The process flow chart of solvent removal type fluorescent penetrant testing and solvent removal type dye penetrant testing is shown in Figure 2. Pre-cleaning
Solvent removal
Dry powder development
Non-aqueous wet development
Removal of developer
Figure 2 The process flow chart of solvent removal type fluorescent (dye) penetrant testing 5 Detection agents and equipment
5.1 Detection agents include penetrants, cleaning agents and developers. Detection agents of different types cannot be mixed. a) The penetrant should have good performance, bright color, no corrosion to the inspected thread surface, and harmless to the human body; b) The cleaning agent should be able to remove excess penetrant on the inspected surface without over-washing; c) The developer should be able to form a uniform background on the inspected surface and have strong adsorption properties for the penetrant. 5.2 The flaw detection device is mainly composed of a penetrant device, a cleaning device, a developing device, a drying device, an observation device, etc. a) The penetrant device includes spraying equipment, etc.
b) The cleaning device includes spraying equipment, etc.
c) The developing device includes wine spraying equipment, etc.
SY/T6508—2000
d) The drying device includes hot air equipment and compressed air equipment, etc. e) The observation device includes a black light lamp for observing internal and external threads, a 5-20 times magnifying glass and a reflector, etc. The wavelength range of the black light is 330-390nm. The ultraviolet irradiance at 380mm from the surface of the black light filter glass should not be less than 1000mW/cm2. The ultraviolet irradiance is measured using an ultraviolet irradiometer. It can also be measured in accordance with GB/T5097. 6 Flaw detection sensitivity and calibration
6.1 Use a stainless steel chrome-plated radial crack test block (B-type test block) to check the performance of the flaw detection agent and calibrate the flaw detection sensitivity. The radial crack type defect on the B-type test block should be able to be found.
6.2 The surface shape of the B-type test block is quite different from the actual inspection thread surface, and the cleaning conditions are also quite different. Therefore, before flaw detection, the natural defect test block with cracks can also be used to calibrate the flaw detection sensitivity. The relationship between the natural defect test block and the B-type test block should be determined through experiments. The calibration steps are the same as the flaw detection steps in Chapter 7 of this standard. The requirements and production of the actual thread test block and the B-type test sample are shown in Appendix A (Appendix to the standard).
7 Inspection steps
7.1 Pre-cleaning
In order to effectively conduct penetration testing, before applying the penetrant on the surface of the thread to be inspected, the oil, mud, chips and other dirt on the thread surface and in the defects must be cleaned and dried. The cleaning method can be solvent cleaning, alkaline cleaning and other methods depending on the different attachments. After cleaning, the inspected part should be fully dried to remove the solvent and moisture in the defect. It can be dried by natural evaporation or compressed hot air.
7.2 Penetration
Spray the penetrant on the surface of the thread to be inspected so that the entire inspected part is completely covered and the surface of the thread to be inspected remains moist during the penetration time. The ambient temperature is preferably 15~40℃, and the penetration time is usually between 10~15min. When the ambient temperature is in the range of 5~15℃, the penetration time should be extended accordingly
7.3 Removal of excess penetrant
Remove excess penetrant from the surface of the inspected thread, so as not to allow the penetrant that has penetrated into the defect to flow out. 7.3.1 The water-washable penetrant is cleaned with water. During cleaning, it is necessary to observe while cleaning to avoid insufficient or excessive cleaning. The cleaning water pressure of the water sprayed by the nozzle or air pressure water/spray gun is generally 0.1~0.3MPa, and the water temperature is 15~40℃. When using fluorescent penetrant, the water cleaning process should be carried out under a black light. The water washing time should be shortened as much as possible to form a suitable background on the thread surface and avoid over-washing. After water washing, it should be wiped dry first, and then blown dry with compressed air. If over-washing is found, it should be dried and re-permeated and washed according to the process. 7.3.2 The solvent-removable penetrant is removed with a cleaning agent. First, a clean, lint-free cloth should be used to wipe until some of the excess penetrant is removed. Then, wipe with a lint-free cloth dipped in a little solvent until all the remaining penetrant is wiped off. In order not to remove the penetrant in the defect, avoid using excessive solvent. If it is found that the penetrant is removed excessively, start from pre-cleaning and reprocess according to the process. 7.4 Drying
Before applying the developer, the surface of the thread to be inspected should be dried. 7.4.1 When the penetrant is removed by water washing, it can be dried by blowing with clean, clean compressed air or a hair dryer.
7.4.2 When the penetrant is removed by a cleaning agent, since the excess penetrant can be wiped off with the cleaning agent, it should be dried naturally or wiped with a cloth, but it must not be heated.
7.4.3 The drying time should not be too long to avoid evaporating the penetrant in the defect and reducing the sensitivity of the flaw detection. 7.5 Development
Development is the process of absorbing the penetrant in the defect to the surface through capillary action and diffusing it to form a clearly visible defect image. 7.5.1 The wet developer is applied before the thread to be inspected is dried. Other types of developers should be applied immediately after the thread to be inspected is dried.
SY/T 6508--2000
7.5.2 The wet or bottom developer can be applied by spraying, showering and other methods. When applying, it should be ensured that the surface of the inspected thread is completely and evenly covered, and the surface of the inspected thread should be microscopically displayed. 7.6 Observation
In order to ensure that the developer fully absorbs the penetrant in the defect, the observation of the displayed traces should be carried out within 7--30min after the developer is applied. If the size of the displayed traces does not expand too much, it can be observed beyond the above time. The internal thread display traces must be observed with the help of a reflector. 7.6.1 When using the fluorescent penetrant method for flaw detection, the black light lamp can be started for 10-15 minutes before work. The black light irradiance on the inspected thread surface should be greater than 1000gW/znz, and the white light illuminance in the local dark environment should be less than 201x. Before inspection, it takes more than 5 minutes for the eyes to adapt to the darkroom environment.
7.6.2 When testing with dye penetrant method, it should be observed under visible light greater than 5001x: 7.6.3 When a display mark appears, a 5-20 times magnifying glass can be used to carefully observe and determine whether the mark is a true defect or a false defect display. 7 After the flaw detection, in order to prevent the residual developer from affecting the use of the inspected thread, the developer on the surface of the inspected thread should be removed and protective treatment should be carried out.
8 Marking and recording of flaw detection results
8.1 Record of display marks
Defect display marks can be recorded by photography, sketches, etc. as needed. 8.2 Marking
When the inspected part needs to be marked, the following method should be used for marking. 1) Mark each qualified product with a colored (purple or yellow) P symbol: b) Mark the defect location with concave color test paint for the inspected part with defects. 8.3 Flaw Detection Record
The following items may be recorded when filling in the flaw detection record: a) Flaw detection date:
b) Name, specification and material of oil well pipe; () Flaw detection method:
(1) Coloration method:
(2) Fluorescence method;
d) Name of flaw detection agent:
e) Flaw detection sensitivity;
) Operation method:
1) Cleaning method:
(2) Penetration method:
(3) Removal method Method:
(4) Drying method:
(5) Development method:
g) Part conditions:
(1) Temperature during inspection (ambient temperature and penetrant temperature) (2) Penetration time:
(3) Temperature and pressure of washing water;
(4) Drying temperature and time;
(5) Development time and observation time;
h) Detection results:
(1) Presence or absence of defects;
SY/T 6508—2000
(2) Characteristics of defect indication traces (position and shape), with sketches or photos attached: i) Name and qualifications of the inspector: 9 NDT report
The report content includes:
a) Name, material and number of inspected oil well pipes; b) Technical documents or NDT requirements of the entrusting unit and the basis; c) Model and category of penetrant NDT agent;
d) NDT sensitivity and NDT results;
e) Signatures of the inspector and reviewer:
f) NDT date and report date;
g) NDT test official seal of the NDT unit.
10 Safety requirements
NDT agents contain flammable and volatile liquids. The NDT site should be well ventilated and away from fire sources. 10.1
Operators should wear latex gloves and masks to avoid prolonged or repeated skin contact with NDT agents. 10.2
10.3 Operators should not look at ultraviolet rays directly with their eyes to prevent eye damage. They can also wear anti-ultraviolet glasses. SY/T 6508-2000
Appendix A
(Appendix of the standard)
Comparison test block
A1 Stainless steel pliers chrome-plated radial crack test (B-type test block): The test block is a rectangular stainless steel test block plated on one side: the recommended size is 130trtm×251m×4mul1, the stainless steel material can be chrome-plated after single-side polishing with 1Crl8Vi9ri, the thickness of the chrome layer is about 25um, annealing after chrome plating to eliminate internal stress, and then, from the unplated surface, a steel ball with a diameter of 10mm is used to hit three-point hardness at 7500V, 10000N and 12500N using the Brinell hardness method to form three radial cracks on the coating.
A2 Actual test block with known cracks, which has the same surface condition, geometric shape and characteristics as the threaded part to be inspected. 13 The test block should be cleaned after use, and no trace of penetrant flaw detection agent should remain. After cleaning, the test block should be stored in a sealed container containing 5U% ethanol solvent, or immersed in acetone or ethanol solution for 30 minutes, dried or blown dry, placed in a test block box, and stored in a dry place.3. Detection Record
The following items can be recorded when filling in the detection record: a) Detection date:
b) Name, specification and material of oil well pipe; () Detection method:
(1) Coloration method:
(2) Fluorescence method;
d) Name of the detection agent:
e) Detection sensitivity;
) Operation method:
1) Cleaning method:
(2) Penetration method: wwW.bzxz.Net
(3) Removal method ：
(4) Drying method:
(5) Development method:
g) Part conditions:
(1) Temperature during inspection (ambient temperature and penetrant temperature) (2) Penetration time:
(3) Temperature and pressure of washing water;
(4) Drying temperature and time;
(5) Development time and observation time;
h) Detection results:
(1) Whether there are defects;
SY/T 6508—2000
(2) Characteristics of defect indication traces (position and shape), with sketches or photos attached: i) Name and qualifications of the inspector: 9 NDT report
The report content includes:
a) Name, material and number of inspected oil well pipes; b) Technical documents or NDT requirements of the entrusting unit and the basis; c) Model and category of penetrant NDT agent;
d) NDT sensitivity and NDT results;
e) Signatures of the inspector and reviewer:
f) NDT date and report date;
g) NDT test official seal of the NDT unit.
10 Safety requirements
NDT agents contain flammable and volatile liquids. The NDT site should be well ventilated and away from fire sources. 10.1
Operators should wear latex gloves and masks to avoid prolonged or repeated skin contact with NDT agents. 10.2
10.3 Operators should not look at ultraviolet rays directly with their eyes to prevent eye damage. They can also wear anti-ultraviolet glasses. SY/T 6508-2000
Appendix A
(Appendix of the standard)
Comparison test block
A1 Stainless steel pliers chrome-plated radial crack test (B-type test block): The test block is a rectangular stainless steel test block plated on one side: the recommended size is 130trtm×251m×4mul1, the stainless steel material can be chrome-plated after single-side polishing with 1Crl8Vi9ri, the thickness of the chrome layer is about 25um, annealing after chrome plating to eliminate internal stress, and then, from the unplated surface, a steel ball with a diameter of 10mm is used to hit three-point hardness at 7500V, 10000N and 12500N using the Brinell hardness method to form three radial cracks on the coating.
A2 Actual test block with known cracks, which has the same surface condition, geometric shape and characteristics as the threaded part to be inspected. 13 The test block should be cleaned after use, and no trace of penetrant flaw detection agent should remain. After cleaning, the test block should be stored in a sealed container containing 5U% ethanol solvent, or immersed in acetone or ethanol solution for 30 minutes, dried or blown dry, placed in a test block box, and stored in a dry place.3. Detection Record
The following items can be recorded when filling in the detection record: a) Detection date:
b) Name, specification and material of oil well pipe; () Detection method:
(1) Coloration method:
(2) Fluorescence method;
d) Name of the detection agent:
e) Detection sensitivity;
) Operation method:
1) Cleaning method:
(2) Penetration method:
(3) Removal method ：
(4) Drying method:
(5) Development method:
g) Part conditions:
(1) Temperature during inspection (ambient temperature and penetrant temperature) (2) Penetration time:
(3) Temperature and pressure of washing water;
(4) Drying temperature and time;
(5) Development time and observation time;
h) Detection results:
(1) Whether there are defects;
SY/T 6508—2000
(2) Characteristics of defect indication traces (position and shape), with sketches or photos attached: i) Name and qualifications of the inspector: 9 NDT report
The report content includes:
a) Name, material and number of inspected oil well pipes; b) Technical documents or NDT requirements of the entrusting unit and the basis; c) Model and category of penetrant NDT agent;
d) NDT sensitivity and NDT results;
e) Signatures of the inspector and reviewer:
f) NDT date and report date;
g) NDT test official seal of the NDT unit.
10 Safety requirements
NDT agents contain flammable and volatile liquids. The NDT site should be well ventilated and away from fire sources. 10.1
Operators should wear latex gloves and masks to avoid prolonged or repeated skin contact with NDT agents. 10.2
10.3 Operators should not look at ultraviolet rays directly with their eyes to prevent eye damage. They can also wear anti-ultraviolet glasses. SY/T 6508-2000
Appendix A
(Appendix of the standard)
Comparison test block
A1 Stainless steel pliers chrome-plated radial crack test (B-type test block): The test block is a rectangular stainless steel test block plated on one side: the recommended size is 130trtm×251m×4mul1, the stainless steel material can be chrome-plated after single-side polishing with 1Crl8Vi9ri, the thickness of the chrome layer is about 25um, annealing after chrome plating to eliminate internal stress, and then, from the unplated surface, a steel ball with a diameter of 10mm is used to hit three-point hardness at 7500V, 10000N and 12500N using the Brinell hardness method to form three radial cracks on the coating.
A2 Actual test block with known cracks, which has the same surface condition, geometric shape and characteristics as the threaded part to be inspected. 13 The test block should be cleaned after use, and no trace of penetrant flaw detection agent should remain. After cleaning, the test block should be stored in a sealed container containing 5U% ethanol solvent, or immersed in acetone or ethanol solution for 30 minutes, dried or blown dry, placed in a test block box, and stored in a dry place.
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.