JB/T 7523-1994 Technical requirements for materials used for penetrant testing
Some standard content:
Mechanical Industry Standard of the People's Republic of China
Technical Requirements for Materials for Penetrant Inspection
1 Subject Content and Scope of Application
This standard specifies the classification, technical requirements, test methods and inspection rules for materials for penetrant inspection. This standard applies to the quality inspection of materials for penetrant inspection. 2
Cited standards
Copper strip corrosion test method for engine fuel
Determination of moisture content in petroleum products
Determination of flash point of petroleum products (closed cup method)Determination of kinematic viscosity of petroleum products
JB/T6064
ZBJ04 005
Technical requirements and technical conditions for chrome-plated test blocks for penetrant testing Penetrant testing methods
ZBH24002
Type A sensitivity comparison test block for penetrant testing
Classification of materials for penetrant testing
3.1 Classification of penetrants
JB/T7523—94
The types of penetrants are divided into three categories: water-washable penetrants, post-emulsification penetrants and solvent-removable penetrants. 3.2
Classification of developers
Developers are divided into two categories: dry developers and wet developers. 3.3 Classification of solvent cleaning liquids
Solvent cleaning liquids are generally divided into two categories: halogen-containing solvent cleaning liquids and non-halogen solvent cleaning liquids. 4
Technical requirements
4.1 General technical requirements for materials for penetrant testing 4.1.1 Toxicity
Non-toxic or low-toxic materials specified in the chemical reagent manual should be used for preparation, and should not cause special irritation to human eyes, skin, and respiratory tract. 4.1.2 Flash point
Tested according to the method specified in Article 5.1 of this standard, the lowest closed cup flash point should be 93℃. 4.1.3 Corrosiveness
4.1.3.1 When tested according to the method specified in Article 5.2 of this standard, when visually inspected with a 10x magnifying glass, the inspected piece should not have loss of gloss, discoloration, or corrosion.
According to the actual use, the user may propose to relax the provisions of Article 4.1.3.1 or propose the requirements for the limit of fluorine, chlorine and sulfur content. 4.1.3.2
But the supply and demand parties must indicate it in the agreement. When it comes to limiting the content of fluorine, chlorine and sulfur, the test method should be indicated in the agreement. 4.1.4 Stability
Approved by the Ministry of Machinery Industry of the People's Republic of China on October 25, 1994 44
Implementation on October 1, 1995
JB/T7523-94
Unused sealed penetration test materials are stored indoors for one year, and their performance should still meet the technical requirements specified in Chapter 4 of this standard.
4.1.5 Compatibility test with oxygen
When the parts exposed to liquid or gaseous oxygen during use are subjected to penetration test, the compatibility and relative sensitivity of the test materials and liquid oxygen must be determined.
4.2 Technical requirements for penetrants
4.2.1 Appearance
Compare the penetrant to be tested with the corresponding reference penetrant [see Appendix A (Supplement)] and observe with the naked eye under white light. Their appearance should be basically the same. The penetrant should not produce gel, segregation, turbidity, coagulation or form stratification on the penetrant surface. 4.2.2 Surface wetting
When tested according to the method specified in Article 5.3 of this standard, the penetrant should easily wet the surface and the film layer should not shrink or form small bubbles. 4.2.3 Viscosity
After testing according to the method specified in Article 5.4 of this standard, the viscosity of the penetrant should not exceed ±10% of the nominal viscosity value of the manufacturer. 4.2.4 Allowable moisture content
When tested according to the method specified in Article 5.5 of this standard, the water-washable penetrant should not produce gel, segregation, turbidity, coagulation or form stratification on the penetrant surface.
4.2.5 Temperature stability
When tested according to the method specified in Article 5.6 of this standard, the penetrant should not have segregation, gelation, coagulation, turbidity or stratification. 4.2.6 Removability
When tested according to the method specified in Article 5.7.1 of this standard, the residual penetrant tested on the test plate should not be more than the corresponding reference penetrant (see Appendix A).
4.2.7 Fluorescence brightness
Tested according to the method specified in Article 5.8 of this standard. The fluorescence brightness of the penetrant made with fluorescent dyes should not be less than 85% of the fluorescence brightness of the reference penetrant.
4.2.8 Stability under ultraviolet light
After exposure to the ultraviolet intensity specified in Article 5.9 of this standard for 1 hour, the average fluorescence brightness of the penetrant under black light irradiation is compared with the average fluorescence brightness of the penetrant without irradiation. The minimum qualified value is 50%. When the user has special requirements, it should be clearly stated in the agreement between the supply and demand parties.
4.2.9 Thermal stability
When tested according to the method specified in Article 5.10 of this standard, the average fluorescence brightness of the sample exposed to high temperature is compared with the sample not exposed to high temperature, and the minimum qualified value is 60%. When the user has special requirements, it shall be clearly stated in the agreement between the supplier and the buyer. 4.2.10 Bath life
When tested according to the method specified in Article 5.11 of this standard, the penetrant should not have segregation, precipitation, bubbles or surface scum. 4.3 Technical requirements for cleaning liquid (emulsifier included in the cleaning liquid) 4.3.1 Appearance
Compare the cleaning liquid to be tested with the corresponding reference cleaning liquid (see Appendix A), and observe their appearance with the naked eye under white light.
2 Viscosity
When tested according to the method specified in Article 5.4 of this standard, the viscosity of the cleaning liquid shall not exceed ±10% of the nominal value of the manufacturer. 4.3.3 Allowable water content and water content
When tested according to the method specified in Article 5.5 of this standard, the post-emulsified lipophilic emulsifier should not produce gel, segregation, turbidity, coagulation or form a water layer.
The water content of concentrated hydrophilic emulsifier should be less than 5% (volume ratio). 445
4.3.4 Temperature stability
JB/T7523-94
When tested according to the method specified in Article 5.6 of this standard, the cleaning solution should not produce segregation. 4.3.5 Bath life
When tested according to the method specified in Article 5.11 of this standard, the cleaning solution should not produce segregation, precipitation or foam. 4.3.6 Cleaning performance
When tested according to the method specified in Article 5.12 of this standard, it should reach or exceed the effect of the corresponding reference cleaning solution. 4.3.7 Contamination of fluorescent penetrants
After testing according to the method specified in Article 5.13 of this standard, the test panel with the cleaning solution to be tested shall not have more residual fluorescence than the test panel with the reference cleaning solution.
4.4 Technical requirements for developers
4.4.1 Appearance
Compare the developer to be tested with the corresponding reference developer (see Appendix A), and observe their appearance with the naked eye under white light.
When tested according to the method specified in Article 5.14 of this standard, the developer to be tested shall not show more fluorescence than the corresponding reference developer. 4.4.3 Sedimentation rate of wet developer
When tested according to the method specified in Article 5.15 of this standard, the sedimentation of wet developer should be less than or equal to 12.5mL. The sedimentation of non-aqueous developer should be less than or equal to 2.0mL.
4.4.4 Re-floatability of wet developer
4.4.4.1 When the re-floatability of water-soluble and water-suspended developers is tested according to the method specified in Article 5.16.1 of this standard, the formed sediment can be re-suspended by gently shaking. 4.4.4.2 When the re-floatability of non-aqueous developers is tested according to the method specified in Article 5.16.2 of this standard, the formed sediment can be re-suspended by gently stirring. 4.4.5 Bulkiness of dry developer
When tested according to the method specified in Article 5.17 of this standard, the loose density of dry powder shall be less than 0.075g/cm2, and the density of compacted dry powder shall be less than or equal to 0.13g/cm2.
4.4.6 Removability
When tested according to the method specified in Article 5.7.2 of this standard, it shall achieve the same effect as the corresponding reference developer. 5 Technical requirements for system sensitivity of penetrant test materials 4.5
When tested according to the method specified in Article 5.18 of this standard, the number of traces of the penetrant test material series tested shall be equal to or exceed the corresponding reference penetrant test material series.
5 Test method
5.1 Flash point test
The flash point test of the penetrant test material shall be carried out according to the test method specified in GB261, and the result shall comply with the provisions of Article 4.1.2. 2 Corrosion test
According to the test method specified in GB378, magnesium alloy MB-2 or aluminum alloy LC4, or chromium-molybdenum structural steel 30CrMo test pieces are selected for testing according to the different materials of the test pieces. The results should comply with the provisions of Article 4.1.3.1. 5.3 Surface wetting test
Apply an appropriate amount of penetrant with the core of absorbent cotton to the clean and shiny surface of the aluminum box, observe after 10 minutes, and the results should comply with the provisions of Article 4.2.2.
5.4 Viscosity test
Test the penetrant and cleaning solution according to the test method specified in GB265, and the results should meet the requirements of Articles 4.2.3 and 4.3.2 respectively. 446
5.5 Allowable water content and water content test
JB/T7523-94
5.5.1 First, add 5% (V/V) water to the water-washable penetrant. Pour 20ml of the material to be tested into a 50mL beaker, put a magnetic rod with a diameter of 7mm and a length of 25mm in the beaker, and place the beaker on a magnetic stirrer. This test should be carried out at a temperature of 21±3℃. Adjust the stirrer speed (about 60r/min) to make the mixing speed fast without bubbles. Use a Class A 10ml dropper to add drops of clean water to the beaker on the stirrer. The end point is reached when the material to be tested becomes turbid or is observed to become thicker as the magnetic stirring rod slows down. At this time, close the dropper and calculate the percentage of allowable water content according to the following formula. bzxz.net
Allowable water content (%) = 20×100
Where: B--the volume of water dripping from the dropper, mL. The result shall comply with the provisions of Article 4.2.4.
5.5.2 When the post-emulsified lipophilic emulsifier is tested according to the test method of Article 5.5.1, the result shall comply with the provisions of Article 4.3.3. 5.5.3 When the water content of concentrated hydrophilic emulsifier is measured according to GB260, the result shall comply with the provisions of Article 4.3.3. 5.6 Temperature stability test
Put not less than 1L of the penetrant or cleaning liquid to be tested in a sealed glass bottle and perform two complete cycles of temperature changes. Each cycle refers to cooling the sample of the tested material from room temperature to -18°C, then heating to 66°C, and then cooling to room temperature; let the sample of the tested material remain at each temperature extreme for at least 8 hours. After the two temperature cycles are completed, observe at room temperature, and the results should meet the requirements of 4.2.5 and 4.3.4 respectively.
5.7 Removability test
5.7.1 Removability test of penetrant
5.7.1.1 Test plate and pretreatment
The test plate is 40mm×50mm×2mm and annealed 1Cr18Ni9Ti stainless steel plate. After degreasing, the test plate is sandblasted with 0.15mm AlO fine particles on both sides of the test plate. The spray gun should be vertical to the surface of the test plate, about 450mm away, and the air pressure is 40×10*Pa. After sandblasting, the surface of the test plate must be free of scratches or other defects, and can only be held by hand by the edge. The test plate should be wrapped in tissue paper before use. After use, the test plate should be placed in a solvent for ultrasonic cleaning or reprocessed as above. 5.7.1.2 Test for the removability of water-washable penetrants Immerse the test panel in the penetrant to be tested, leave it for an appropriate time, take it out and drip it at an angle of about 60° for about 10 minutes to allow it to drip dry. Place the test panel in a flushing device and rinse it for 20 seconds. The flushing device should be equipped with two nozzles. The gauge pressure of the spray water is 20×101Pa and the water temperature is 21±3°C. Then dry it in a drying oven at 66±3°C for 90°C. Then use another test panel to treat it in the same way with the corresponding reference penetrant. Observe and compare the two test panels under appropriate light. The results should meet the requirements of Article 4.2.6. Test again and rinse with water at 38±3°C.
5.7.1.3 Removability test of solvent-removable penetrants Apply the test penetrant to the test panel and leave it on for the time specified in the product instructions. Then drip it at an angle of approximately 60° for approximately 10 minutes. Wipe off the excess penetrant with a clean, lint-free cloth or tissue. Spread an absorbent paper towel evenly on a flat horizontal surface and wet the paper towel with the corresponding reference cleaning solution (but not soaking it thoroughly). Place the test panel on the paper towel and wipe it with the paper towel. Then observe and compare it with the test panel treated with the corresponding reference penetrant in the same manner as above under appropriate light. The results should meet the requirements of Section 4.2.6. 5.7.1.4 Removability test of post-emulsified (lipophilic) penetrants Immerse the test panel in the test penetrant and leave it for an appropriate time. After removing it, drip it at an angle of approximately 60° for approximately 10 minutes. Then immerse the test panel in the corresponding reference cleaning solution (emulsifier). After removing it, let it drip at an angle of approximately 60° for approximately 1 minute to allow it to drip dry. Then put the test board into the flushing equipment and flush for 30 seconds. The flushing equipment should be equipped with two nozzles. The flushing water gauge pressure is 7×10*Pa and the water temperature should be 21±3℃. After flushing, dry it in a drying oven at 66±3℃ for 90 seconds. Then observe and compare it with the test board treated with the corresponding reference penetrant in the same way as above under appropriate light. The result should meet the requirements of Article 4.2.6. Test again with 3±3℃ water. 5.7.1.5 Removability test of post-emulsified (hydrophilic) penetrant 447
JB/T7523-94
Put the test board into the tested penetrant, stay for a proper time, take it out and drip it at a maximum angle of 60° for about 10 minutes, and then put the test board into the flushing equipment and flush for 15 seconds. The flushing equipment should be equipped with two nozzles. The flushing water gauge pressure is 20×10Pa and the water temperature is 21±3℃. Then immerse the test panel in the corresponding reference hydrophilic emulsifier (according to the concentration recommended by the manufacturer) for 2 minutes, take out the test panel and put it into the washing equipment again for washing for 30 seconds, and finally dry it in a drying oven at 66±3℃ for 90 seconds to make it dry. Then observe and compare it with the test panel treated with the corresponding reference penetrant in the same way as above under appropriate light, and the result should meet the requirements of Article 4.2.6. 5.7.2 Removability test of developer
5.7.2.1 Test panel and pretreatment
Same as Article 5.7.1.1.
5.7.2.2 Removability test of dry developer Spray the developer to be tested and the corresponding reference developer on two test panels (one for the developer to be tested and the other for the reference developer) respectively, and let them stand for 5 minutes. Spray with clean water at a water pressure of 20×10*Pa for 1 minute, air dry the test panel and observe under oblique white light or natural light. The result shall comply with the provisions of Article 4.4.6. 5.7.2.3 Removability test of water-miscible and non-water-wet developers Mix the developer to be tested into a suspension or solution according to the manufacturer's instructions and apply it to the entire surface of the test panel. Apply the corresponding reference developer to the second test panel. Then place them in a circulating oven at 105±3℃ at an angle of 45° for 90$ to dry. After drying, rinse the test panel with clean water at a water pressure of 20×10*Pa for 1 minute, air dry it, and then place it under oblique white light or natural light for comparative observation. The result shall comply with the provisions of Article 4.4.6. 5.8 Fluorescence brightness test
Measure the fluorescence brightness with an electronic filter fluorometer or equivalent instrument. 5.8.1 Preparation of Specimens
Before testing, dilute a small amount of the reference penetrant and the penetrant to be tested with a suitable nonfluorescent, highly volatile solvent, such as analytical ethanol, in a ratio of 1 (penetrant): 9 (solvent). Each penetrant should be diluted with the same solvent, the solutions stirred, and then poured into separate, suitable large containers. Cut filter paper to a size suitable for the electronic filter fluorometer sample holder, immerse in each solution, remove, clamp vertically with the holder, and air dry for 15 minutes. The filter paper should be dried for at least 24 hours before immersion in the solution. The surface of the filter paper sample in contact with the holder should be as small as possible. Prepare 6 filter paper samples for the reference penetrant and 5 filter paper samples for the penetrant to be tested. 5.8.2 Test Procedure
5.8.2.1 Use a reference penetrant filter paper sample as the basis for instrument adjustment. Compare the reference penetrant filter paper sample with the penetrant to be tested under black light. Measure one at a time and only on one side, read and record the test results. Five reference penetrant filter paper samples and five test penetrant filter paper samples should be tested alternately to compensate for instrument reading drift. 5.8.2.2 After all readings are recorded, calculate the average of the fluorescence brightness readings of the reference penetrant filter paper samples and the test penetrant filter paper samples. Take the average of the reference penetrant filter paper sample readings as 100% and compare it with the average of the test penetrant filter paper sample readings. The results should comply with the provisions of Article 4.2.7. 5.9 Ultraviolet stability test
This test should be carried out after the fluorescence brightness test. Using the same test and instrument, 10 filter papers are immersed in the dilution of the test penetrant (Article 5.8.1). Take out the filter paper samples, dry them for 5 minutes, and hang the fixture with the 5 filter paper samples in a place that can avoid strong light, strong heat and strong airflow. The other 5 filter paper samples are exposed to a stable and uniform (on all 5 samples) ultraviolet light with an illumination of 800 ± 40μW/cm2 for 1 hour. Then, cross-measure 5 exposed and 5 unexposed filter paper samples according to 5.8.2.1, and find the average reading of the exposed filter paper samples. Then compare it with the average reading of the unexposed filter paper samples. The result should meet the requirements of 4.2.8. 5.10 Thermal stability test
This test should be carried out after the fluorescence brightness test, using the same filter paper test and instrument. Soak 10 filter papers in the dilution solution of the penetrant to be tested (5.8.1). Take out the filter paper samples, dry them for 5 minutes, and hang the fixture with 5 filter paper samples in a place that can avoid strong light, strong heat and strong airflow (if the ultraviolet stability test is carried out at the same time, 5 identical unexposed filter paper samples can be used for both tests). The other 5 filter paper samples are placed on a clean metal plate in an oven at 114±2℃ for 1 hour. Then, cross-measure the fluorescence brightness of 5 baked and 5 unbaked filter paper samples according to 5.8.2.1. The fluorescence brightness of the baked filter paper samples is measured on the other side of the metal plate. Calculate the average reading of the baked filter paper samples. Then compare with the average reading of the unbaked filter paper sample, and the result should meet the requirements of Article 4.2.9.
5.11 Bath life test
Put 50mL of the penetrant and cleaning solution into 150mm heat-resistant beakers respectively, put them into a hot convection oven, keep them warm at 50±3℃ for 7h, then take them out and cool them to room temperature. Visually inspect the results, the penetrant and cleaning solution should meet the requirements of Articles 4.2.10 and 4.3.5 respectively.
5.12 Cleaning performance test of cleaning solution
5.12.1 Test plate and pretreatment are the same as those in Article 5.7.1.1. 5.12.2 Solvent-based cleaning fluid test
Apply the corresponding reference penetrant of the same type to two test panels, leave it on for the time specified in the product manual, then drip it at an angle of about 60° for about 10 minutes, and wipe off the excess reference penetrant with a clean, lint-free rag or hand towel. Lay two absorbent papers flatly on a flat horizontal surface and wet the paper towels with the corresponding solvent-based cleaning fluid to be tested and the reference solvent-based cleaning fluid (but not soaking wet). Place the two test panels on the two papers and wipe them with paper towels, pick up the test panels, and observe the two test panels under appropriate light. The results should comply with the requirements of Article 4.3.6.
5.12.3 Post-emulsification (lipophilic cleaning liquid test) Immerse two test panels in the corresponding reference penetrant of the same type, leave for an appropriate time, take them out and let them drip at an angle of about 60° for about 10 minutes, then immerse the two test panels in the corresponding reference post-emulsification (lipophilic) cleaning liquid and the tested post-emulsification (lipophilic) cleaning liquid respectively, take them out and let them drip at an angle of about 60° for 1 minute, then put the test panels into the flushing equipment for 30. The flushing equipment should be equipped with two nozzles, the flushing water gauge pressure is 7×10\Pa, and the water temperature is 21±3℃. After flushing, dry the coal for 90$ in a drying oven at 66±3℃. Observe the two test panels under appropriate light, and the results should meet the requirements of Article 4.3.6. Test again with 38±3℃ water. 5.1 2.4 Post-emulsified (hydrophilic) cleaning liquid test: Immerse two test panels in the corresponding reference penetrant of the same type, leave for an appropriate time, take them out and let them drip at an angle of about 60° for about 10 minutes, then put the test panels into the flushing equipment for flushing for 15 seconds. The flushing equipment should be equipped with two nozzles, the gauge pressure of the flushing water is 20×10Pa, and the water overflow is 21±3°C. Then immerse the two test panels in the corresponding tested post-emulsified (hydrophilic) cleaning liquid and the reference post-emulsified (hydrophilic) cleaning liquid (according to the concentration recommended by the manufacturer) for 2 minutes, take them out and rinse them in the flushing equipment for 30 seconds, then dry the test panels in a drying oven at 66±3°C for 90°C. Observe the two test panels under appropriate light, and the results should comply with the provisions of Article 4.3.6. 5.13 Fluorescent penetrant contamination Dyeing test
Apply a mixture of 4 volumes of the cleaning solution to be tested and 1 volume of the penetrant to be tested on a test plate (in accordance with the provisions of Article 5.7.1.1), and apply the same proportion of the mixture of the reference cleaning solution and the reference penetrant to another test plate. After the test is carried out in accordance with the provisions of Article 5.7.1.4 or 5.7.1.5, compare the test plate with the penetrant material to be tested with the test plate with the reference penetrant material. There should be no more residual fluorescence.
5.14 Dry developer non-fluorescence test
Place the developer under a black light with a light intensity of 800 ± 40W/cm2 and observe with the naked eye. It should comply with the provisions of Article 4.4.2. 5.15 Sedimentation rate test of developer
5.15.1: Wet developer shall be tested according to the manufacturer's instructions. Mix according to the instructions and let stand for 4 hours. Then inject 25mL of the mixed liquid into a 25mL measuring cylinder, let stand for 15 minutes, and check the sediment with the naked eye. The result should meet the requirements of Article 4.4.3. 5.15.2 Stir the non-water-wet developer until all the solid powder is suspended, then inject 25mL of the suspension into a 25ml measuring cylinder, let stand for 15 minutes, and check the stratification of the suspension; that is, below the surface of the entire mixed liquid, the sediment should meet the requirements of Article 4.4.3.
5.16 Resuspensibility test of wet developer
5.16.1 Water-soluble and water-suspended developers: Mix according to the manufacturer's instructions, then let stand for 24 hours, then gently shake it and observe with the naked eye. The result should meet the requirements of Article 4.4.4.1. 449
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5.16.2 Non-water-mixable developer: Before testing, the material should be stirred until all solid powders are suspended. For atomized packaged products, the pressure in the container should be released first, and then all products should be poured into a suitable container and stirred until all solid powders are suspended. Let it stand for 24 hours. Then shake it gently and observe it with the naked eye. The result should meet the requirements of Article 4.4.4.2. 5.17 Looseness test of dry developer
Test by measuring the density of dry developer. Cut a clean, dry, 500mL measuring cylinder accurately from the 500ml mark, and then weigh the mass of the cylinder to the nearest 0.5g. Tilt the cylinder at a 30-degree angle, and let the dry developer powder slide gently along the cylinder wall into the cylinder to fill it up and overflow. After each addition, restore the cylinder to a vertical position to prevent air pockets from forming. It is strictly forbidden to shake or knock the measuring cylinder. Use a ruler to scrape off the excess developer powder, tie a piece of paper at the mouth of the cylinder, and let the measuring cylinder fall freely from a height of 25mm repeatedly onto a rubber plate with a thickness of 10mm and a hardness of 62 (determined by the GB531 rubber Shore A hardness test method) to compact the developer powder. Set a ring around the tripod to ensure a correct drop height, that is, when the measuring cylinder is inserted into the ring and lifted to the highest vertical stroke, the distance between the bottom of the measuring cylinder and the rubber plate should be 25mm. After each drop, turn the measuring cylinder 90°. After every 5 drops, read the volume occupied by the developer powder, and repeat until the volume remains unchanged. Finally, remove the paper and weigh the total mass of the measuring cylinder and the developer powder contained. The mass of the developer powder is the total mass minus the mass of the measuring cylinder. The loose density of the developer is its texture divided by 500, and the tapped density is the mass of the developer powder divided by the volume occupied after compaction. The measured loose density and compacted density of the developer must comply with the provisions of Article 4.4.5. 5.18 System sensitivity test of penetrant testing materials 5.18.1 Low-sensitivity penetrant testing material series 5.18.1.1 Use the A-type test block specified in ZBH24002 and test the penetrant testing materials according to the flaw detection steps specified in ZBJ40005.
5.18.1.2 Apply the penetrant testing material series to the half surface of the A-type test block separated by a 1.5mm groove, and apply the reference penetrant testing material series to the remaining half surface. The residence time is in accordance with the manufacturer's product instructions. Process three such test blocks. Compare the traces formed by the penetrant test material series to be tested with the traces formed by the reference penetrant test material series, and the results shall comply with the provisions of Article 4.5:
5.18.2 Medium and high sensitivity penetrant test material series5.18.2.1 Use the C-type test block specified in JB/T6064 and test the penetrant test material series to be tested according to the flaw detection steps specified in ZBJ04005, and record the traces formed (recommended by photography). 5.18.2.2 Clean the test plate with a cleaning solution and dry it, then perform ultrasonic cleaning for at least 10 minutes, then clean it with methanol, and then dry it in an oven at 67±3℃ for about 10 minutes.
5.18.2.3 After the test plate is cooled to room temperature, test it with the reference penetrant test material series and record the traces formed. 5.18.2.4 Compare the traces (photos) formed by the series of materials used for penetrant testing to be tested with the traces (photos) formed by the series of materials used for reference penetrant testing. The results shall comply with the provisions of Article 4.5. 5.18.3 Carry out the above steps twice.
6 Vessel Performance Test
6.1 Tanks and containers shall be randomly sampled.
6.2 Completely immersed in water at a pressure of 88N/cm, the highest point of the atomizer is 7cm from the water surface, the air temperature is 22±3℃, and no bubbles are generated within 30min. If bubbles are generated, the situation should be recorded, and the number of bubbles should be recorded if possible. 6.3 The hand-removal valve should feel free and there should be no jamming. 6.4 Spray continuously until the liquid is finished, and record the number of blockage interruptions. 6.5 Record the maximum spray distance at a height of 1.5m and the uniformity of the fog point. 7 Inspection rules
7.1 Factory inspection
Products must be sampled batch by batch before leaving the factory, and the following items must be inspected: 450
Flash point:
Removability of penetrant and developer;
Sensitivity of the material system for penetrant inspection.
Type inspection must be carried out in the following situations: a,
JB/T7523—94
Trial design and identification of new products or old products for transfer to factory production; after formal production, if there are major changes in materials and processes that may affect product performance; during normal production, regular inspections should be carried out after a certain amount of production has been accumulated; when the product is resumed after a long period of suspension; when the factory inspection results are significantly different from the last type inspection; when the national quality supervision agency proposes a requirement for type inspection. Regardless of factory inspection or type inspection, if it does not meet the technical requirements of Chapter 4 of this standard, it will be treated as a non-conforming product. Marking, transportation, storage
Product markings should include:
Manufacturer name;
Product name, model or mark;
Manufacturing date (or number, or production batch number); product validity period.
The transportation precautions should be specified in the product manual. 8.2
3The product should be stored indoors, without direct sunlight, and the room should be well ventilated. 8.3
JB/T7523--94
Appendix A
Reference Penetrant Test Materials
(Supplement)
A1The penetrant test materials selected by the manufacturer, which have passed the test of this standard and have been effectively used by the user unit for more than half a year, are regarded as the first batch of reference penetrant test materials.
A2Take 1kg of reference penetrant test materials and seal them in a glass container, store them in a cool, dry, ventilated, and sunlight-proof room, and mark the materials, batch numbers, dates, etc. The storage expiration date shall not exceed half a year. The reference penetrant test materials that have been stored for more than half a year should be re-provided in accordance with the provisions of Chapter A1. A3
Additional Notes:
This standard is proposed and managed by the National Technical Committee for Standardization of Nondestructive Testing. This standard is drafted by the Shanghai Institute of Materials and the Beijing Institute of Aeronautical Materials. The main drafters of this standard are Mi Zhongyu, Ren Xuedong and Chen Jinbao.
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