JB/T 9212-1999 Ultrasonic flaw detection of welds of atmospheric pressure steel oil tanks
Some standard content:
ICS 25. [60. 40
Machinery Industry Standard of the People's Republic of China
JB 4212-1999
Ultrasonic flaw detection of welds oa steel oil tanks1990-06-28 Issued
National Bureau of Machinery Industry
2000-01-01 Implementation
JD:T 9212-1999
This standard specifies the ultrasonic flaw detection method for normal pressure steel welds of 2B 800-88. During the revision, the original revision was made: the main technical content has not changed. This standard shall be effective from the date of implementation (BE9800)-88. This standard is proposed by Shanghai Materials Research Institute. This standard is under the jurisdiction of the National Optical Loss Detection Technology Committee. This standard was drafted by: China National Chemical Corporation. Specification
Machinery Industry Standard of the People's Republic of China
Ultrasonic flaw detection of normal pressure steel oil welds
T:ttrasanictawderectionefweldsol steel oilTanksJB/T9212-1999
Generation 7.99869188
This standard specifies the requirements for personnel, instruments, test blocks, and the detection methods and the quality of the detection results of normal pressure steel welds. This standard is applicable to the butt joints and lap joints of 4-32mm thick steel chains. 1. Ultrasonic flaw detection of shaped joints. This standard is not applicable to the ultrasonic flaw detection of steel chain parts. 2. References to standards do not list the texts contained in the standards. The provisions of this standard shall be cited or implemented in this standard. When the quality of this standard is good, the frequency is also reversed, and the treatment machine will be pulled! All parties who try this standard should explore the possibility of using the latest version of the standard 0 4739-1994
positive customer data non-destructive initial test
point to open the pulse reflection ultrasonic flaw detection system for performance testing JB: 9214-[999
B: 10U61-State 9A pulse method area emission I whole acoustic flaw detection general technical system JH/! 10062-10 State ultrasonic flaw detection horse head performance test method 3 detection personnel
3.! All personnel have a high level of professional examination and qualification certificate issued by Bai Xinmei. The personnel who sign and write the report shall hold at least Grade 1 qualification certificate. 3. The inspection personnel shall learn to inspect the quality of the workpiece, the shape of the weld groove, the quality of the workpiece, the intensity of the defect and the code, and be able to conduct comprehensive inspection and evaluation based on the reflected signal on the carbon light. The performance of the flaw detector and the head shall also meet the requirements of JBT[CG61. 4. The performance of the probe used for acoustic wave detection meets the requirements of B10062. Its operating frequency is 2.5-5.5MHz, and the F-cut value of the radiation is between: .0)-30. It is selected according to Table 1 and Table 2. The selection of the values on the probe in Table 1 is approved by the State Administration of Machinery Industry on 1999-06-28*
2.0- 2. 5
63.50.71.5
55\-64 +
2000-01-01
JD/T9212-1999
Liquid 3 lap joint, selection of the values on the T-shaped joint 1u
4*- 56
450-63.55
1.3 etc. When the flaw detector has a 4-6mm defective chain, point focusing, line focusing, and dual-quality probes can be used. .4 The flaw detector and the flaw detector system should meet the maximum sensitivity required by the microcontroller. When the flaw detection sensitivity is met, the effective quality margin is at least 10dB, and the resolution of
= deep defense should be able to convert CSK-! A-type test block has 44mm and 2mm holes with reflection wrinkles separated. When the amplitude of the two reports is the same, the drop and the trough are not less than 6dB. 5.1 The flow is made of the same or similar materials as the test piece. The material is tested with a sensitivity of 2mm bottom hole. No cross-section is found. The block types include CSK-IA, OUT- and T-2. 5.2 CSK-4 type test block or meets the requirements of JH4730. 5.3-! and V[-2 two potentials meet the requirements of Figure] and Figure 2 respectively. .s
(p2 ± c.c5
Network! OUT-I test #
J8/9212-1999
Week 2 OLT-2 Discussion
5, in the case of sufficient sensitivity requirements, other types of test defects can also be used. Precautions before core flaw detection
6.1 Site safety requirements
: Q235 or Q255
Due to the source flaw instrument has a number of preferred pressure: not allowed When working in hazardous areas with flammable and explosive materials, it is also necessary to carry out a flame retardant and explosion-proof safety inspection on the inspection items before starting work. 6.2 Appearance requirements
New ultrasonic flaw detection of the source shall be carried out after the weld appearance quality inspection is qualified. 6.3 Selection and cleaning of the inspection surfacebzxz.net
6.3.1 The inspection surface of the overlapped joint of the bottom plate and the inner floating plate is the pressure plate side of its welding surface, and the deep inspection surface of the wall is the outer surface of the oil tank. See Figure 3,
Safety · Change
Natural: 3 lap welding damage parts
JH/T97121949
and 3.2 micro-adjustment of the original front of the welding joint. The damage surface is the inner surface or outer surface that can be eliminated. The thickness of the butt weld is 16mm. The parts that need to be inspected and replaced need to be measured. The thickness of the butt weld chain is 16mm: the side detection must be carried out continuously. 3. 3 Detection degree (Lang probe scanning range) is the air travel type (:) marry, long day is not less than: 20 F-2 RT+50:
Wherein: 3. : · Width of probe, mm.
Damage mark, positive value:
7. i. Degree. mm
, 3 Before replacement, the splash point, fall and welding level of the detection surface should be adjusted to ensure a good distance between the probe and the detection mine:
7. Drawing of the colinearity of the wave vibration and calibration of the divergent position 7. When detecting the weld seam, the sound axis diagram should be drawn according to the connection form and the thickness of the probe core. The 0UT1 reduction should be used to determine the service area of 2m>40mm hole, the degree of damage and the range of the damage, and the good distance of the wave vibration in the measured area. The calibration and measurement results should be remembered, and the digital sewing system under the wide model should be used to draw the amplitude # line diagram|| tt||7.1.2 When detecting the plate thickness less than 6mm, use 0UT-2 test garbage-0.5mmx.5rm hand-held reflected wave to calibrate the required echo, judge the same, measure the reflected night ant feeling, and mark the measurement level! Strict table 3. Complete report quality table: the number of the system standard disease-covered line, install 3 echo calibration and set amplitude measurement record table-I war consultation number
echo position back
judgment standard use
7.1.3 When setting the correct wave position, the instrument should be slow and the depth of the head should be recorded with the total drum inspection value. From the water half positioning method, depth positioning method, sound range determination, it is recommended to select a more suitable positioning method. T.1.4 The test amplitude is determined by the other waste line, the compensation, the average limit end (abbreviated as the measurement! The area between the measuring line and the center of the fixed shape is called the "area", the area between the fixed lookout line and the judgment line is called the courtesy area, and the area above the judgment line is called the low area. The sensitivity values represented by the three front lines in Figure 4 are also shown in Table 4,
represents the range of the sensitivity of the line from the island to the island
2~4(—14 d
0.5-0.5×40—6 cD
can be determined by
2+4—15
judgment quality
42·4—2
3.5- 5-49.8B
JB-1:9212—1999
Figure 4 Distance-secretion curve diagram
7,.5 In giving uniform point wave noise curve energy R": the data taken on each required line shall not be less than one 7,1.6 In actual use, the wire attached to the system is separated from the second interval line and the night core is often carried out. Each time the degree point is 7.2, the degree of injury is invited to bite the correct degree
7.2,1 is prohibited from being sensitive to the average product The degree of depth can not be avoided. According to the quality of the workpiece, the surface can be photographed and the sensitivity caused by the hardening of the material surface can be repaired! Perform the 473D method
7.1 deep loss scanning
7.3.1 The probe is scanned between the deep head and the center line of the weld. The scanning method can be used to ensure that the teeth are in the shape of teeth and the 1015 part is real. The inspection energy must not be reduced! .Figure! : :0*- 13*
Address: Shangdian
[5The probe is used for scanning and reporting. The report is about =IC-
32The scanning is sure to have a good relationship between the macro probe and the temperature surface. The material is directly used, such as Kaizhou, micro-lubrication, etc. 3.3 In order to distinguish the defect wave from the micro signal and determine the defect position, the method is suitable for taking the scanning methods such as rear, east, corner, and surround (see Figure 6) according to the needs of the method. The probe scanning method is dynamic and broken. 4 Judgment of defect performance determination
JB/T:9212—1999
一, 41 The speed of the defect should be determined based on the position, amplitude, return shape of the defect reflection wave and the scanning method of the probe on the inspected piece, and the defect will be comprehensively judged. If there are echo pairs that are difficult to judge, they can be measured together with other methods. 7.4.2 Defect determination
When the defect is found, the defect position on the oscilloscope is adjusted according to the position of the defect wave, and the probe of the defect detection wave is used to temporarily locate the defect. If necessary, other effective methods can be used for identification. 1.4.3 Defect determination
7.43.1 All defects above the auxiliary line and the single line should be determined. The determination of defects includes the defect end and the defect length of the measured product. 7.4.3.3 The measurement of defect amplitude is set as the probe width, and the defect amplitude is measured at a distance from the high-effective amplitude in the middle of the area. 4.3.3 Measurement of defect index length When the defect has only one high point, use the half-wave height method (6dB method) to measure the defect indication length: When the defect has multiple high points, the half-wave height method (end point 6dB method) is used to measure the defect indication length. 4.3. For this defect, if the inspector believes that it is necessary to lengthen the defect, the defect height can be moved to the measuring line, and the probe moving point area is used as the exact defect indication length. 7.5 Any defect should be re-tested as needed to meet the requirements of the instrument, detector performance and detection sensitivity. The re-testing method shall comply with the specifications of 9214. 8.1 The bottom weld of the oil-reinforced steel bar, the bottom weld of the bottom cover and the weld of the inner floating weld should be tested in reverse order according to the actual situation. The weld of the T-shaped weld should be tested at the end of the T-shaped weld. The minimum detection percentage of the weld of the oil-reinforced steel bar is 50%. 4. When the unqualified rate is greater than 1% within a length of 5m during the test, the defect should be extended to a total detection length of 1m. If the test is still unqualified, the entire weld should be tested. 9. Quality assessment
9. The following defects should be judged as unqualified:
9.1.1 Defects with wave height above the judgment line and in the blood zone. 9.1.2 Single defect with wave height above the quantitative line and in the inner zone II. The indication length is 1>3mm. The indication length is 1>7. The indication length is 1>8mm. 9.1.3 Single defect length has not changed beyond the provisions of 9.1.2, and the total length of defects within the 3T length range exceeds the provisions of 9.1.2. 1.2 Defect length is the total length of defects. All defects with a length less than 18 are calculated as 4mm. 1.2 and 9.3 are specified. When the defects are too short, the quality inspection personnel can determine that they are dangerous defects. The quality inspection work is not subject to the restrictions of 9.1.3. 1.1 Unqualified weld treatment and inspection JB/T9212-1999 1.2 Unqualified weld treatment and inspection JB/T9212-1999 1.2 Unqualified weld treatment and inspection JB/T9212-1999 1.3 ... If the repair effect of the defect is unqualified, the repaired part shall be treated. 11. Inspection records and inspection reports
11. Good records should be kept during the inspection, and the inspection report should be written as soon as possible after the inspection: 11.2 Inspection records should include: workpiece name, number, material, type of inspection, instrument and probe used (sequence, size), block type, adhesive, defect location, sink height of the lower and upper areas, defect indication length, repair length accumulation, number of repairs, and repair length of the repaired part. 11. Inspection report should mainly include: workpiece name, material, quality, process and part number, inspection method, instrument and probe test block used, defect length ratio, defect location diagram, missing conditions, and optional repair conditions. The inspection period and the defects have been completed. The anonymous names of the inspectors and reviewers are:The inspection report should include: workpiece name, material, quality, process and part number, inspection method, test block of the test probe used, length ratio of the defect, schematic diagram of the defect location, missing information, and optional repair information. The inspection period and the inspection result are as follows:The inspection report should include: workpiece name, material, quality, process and part number, inspection method, test block of the test probe used, length ratio of the defect, schematic diagram of the defect location, missing information, and optional repair information. The inspection period and the inspection result are as follows:
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