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NB/T 47013.3-2015 English PDF (NBT47013.3-2015)

NB/T 47013.3-2015 English PDF (NBT47013.3-2015)

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NB/T 47013.3-2015: Nondestructive testing of pressure equipments - Part 3: Ultrasonic testing [Including 2018XG1]

This Part of NB/T 47013 specifies the pressure equipment shall adopt ultrasonic testing method and quality grading requirements in which shape A pulse reflection ultrasonic detector is used to test work piece defect.
NB/T 47013.3-2015
ENERGY INDUSTRY STANDARD
OF THE PEOPLE'S REPUBLIC OF CHINA
ICS 77.040.20
H 26
Replacing JB/T 4730.3-2005
Nondestructive testing of pressure equipment
- Part 3: Ultrasonic testing
[Including Modification 2018XG1]
ISSUED ON: APRIL 02, 2015
IMPLEMENTED ON: SEPTEMBER 01, 2015
Issued by: National Energy Administration
Table of Contents
Foreword ... 5
1 Scope ... 9
2 Normative references ... 9
3 Terms and definitions ... 10
4 General requirements ... 11
5 Ultrasonic testing methods and quality grading for standby raw material or components of pressure equipment ... 18
6 Ultrasonic testing method and quality grading of welded joint for pressure equipment ... 49
7 Ultrasonic measuring methods for thickness of pressure equipment ... 77 8 Ultrasonic testing methods of in-service pressure equipment ... 84
9 Ultrasonic testing records and reports ... 96
Annex A (Normative) Requirements for electrical performance indicators of ultrasonic testing instruments ... 98
Annex B (Normative) Requirements for performance indicators of probe used for ultrasonic testing ... 102
Annex C (Normative) Requirements for performance of double-crystal straight probe ... 104
Annex D (Normative) Ultrasonic testing methods and acceptance standard for plates used for pressure equipment by using an angle probe... 106
Annex E (Normative) Ultrasonic testing methods (by using an angle probe) and quality classification of steel forgings used for pressure equipment ... 109 Annex F (Normative) Ultrasonic testing methods (by using an angle probe) for austenitic steel forgings used for pressure equipment ... 112
Annex G (Normative) Ultrasonic testing method and quality classification of the welding overlay of pressure equipment ... 114
Annex H (Normative) Ultrasonic testing method and quality classification of the butt joints of pressure equipment made by aluminum and aluminum alloy and titanium ... 119
Annex I (Informative) Ultrasonic testing method and quality classification of the butt joints of austenitic stainless steel ... 123
Annex J (Normative) Ultrasonic testing method of the curved longitudinal butt joints of pressure equipment ... 132
Annex K (Normative) Ultrasonic testing method of the curved circumferential butt joints of pressure equipment ... 136
Annex L (Normative) Ultrasonic testing method of fillet joints for nozzles and shells (or heads) of pressure equipment ... 139
Annex M (Normative) Ultrasonic testing method of T-type welding joints ... 145 Annex N (Normative) Specific requirements for the ultrasonic testing for welding joints of different types ... 148
Annex O (Normative) CSK-III A Test specimen ... 160
Annex P (Normative) Determination of the loss difference during sound energy transmission ... 161
Annex Q (Normative) Echo dynamic patterns ... 165
Annex R (Normative) Defect Height Measurement Method (I) Measure defect height by the endpoint wave diffraction method ... 169
Annex S (Normative) Defect Height Measurement Method (II) The End Echoes Diffraction Method to Measure the Defect Height ... 176
Annex T (Normative) Defect Height Measurement Method (III) Using -6 dB
method for measuring defect heights ... 179
Modification Notification of Industry Standard NB/T 47013.3-2015 (2018XG1) ... 182
Foreword
This Standard, NB/T 47013 ?€?Nondestructive testing of pressure equipment?€?, consists of the following 13 parts:
- Part 1: General requirements;
- Part 2: Radiographic testing;
- Part 3: Ultrasonic testing;
- Part 4: Magnetic particle testing;
- Part 5: Penetrant testing;
- Part 6: Eddy current testing;
- Part 7: Visual testing;
- Part 8: Leak testing;
- Part 9: Acoustic emission testing;
- Part 10: Ultrasonic time of flight diffraction technique testing;
- Part 11: X-ray digital radioscopic examination;
- Part 12: Magnetic flux leakage testing;
- Part 13: Pulsed eddy current testing.
This Part is Part 3: Ultrasonic testing of NB/T 47013.
This Part is drafted according to the rules provided in GB/T 1.1-2009 ?€?Directives for standardization - Part 1: Structure and drafting of standards?€?.
This Part replaces JB/T 4730.3-2005 ?€?Nondestructive testing of pressure equipment - Part 3: Ultrasonic testing?€?. The main technical changes are as follows, compared with JB/T 4730.3-2005:
- ADD ?€?terms and definitions?€?, including terms and definitions related to ultrasonic testing in the former JB/T 4730.1;
- REPLACE JB/T 10061 ?€?Shape A Pulse Reflection Ultrasonic Flaw Detector - General Technology Condition?€? WITH GB/T 27664.1 ?€?Nondestructive Testing Performance and Inspection of Ultrasonic Testing Equipment - Part 1: Instrument?€?. Put forward more scientific requirements for performance of ultrasonic testing equipment;
- ADD specific performance indicator requirements for ultrasonic test instrument and probe;
- ADD requirements for calibration, inspection, operational inspection; and check of ultrasonic test instrument and probe;
- ADD ?€?safety requirements?€?; and put forward requirements for safety of personnel in process of ultrasonic test;
- ADD requirements for process files; and list out the related factors to formulate process procedure;
- RE-DIVIDE types (standard test block and reference block) of test blocks used in this part; and such division was implemented mainly based on domestic general standards, instead of dividing types of standard test block and reference block in this Part;
- ADJUST the sequence of ?€?ultrasonic testing methods and quality grading for standby raw material or components of pressure equipment?€?, so as to formulate in accordance with the order of plate, composite plate, carbon steel and low alloy steel forgings, steel bolt billet, austenite steel forgings, seamless steel pipe and so on;
- COMBINE ultrasonic testing methods and quality grading of carbon steel and low alloy steel, aluminum and aluminum alloy plate, titanium and titanium alloy plate, as well as nickel and nickel alloy plate, austenite stainless steel and duplex stainless steel, and so on. Redesign reference blocks. The detection sensitivity shall be mainly determined by flat bottom hole distance amplitude curves of reference blocks. Modify the quality grade requirements to stricter requirements for qualified indicators at all levels. As the plates in JB/T 4730.3-2005 have lower requirements for testing quality level, it is difficult to control the quality requirements, and moreover, as it has larger difference from specific indicators as required by ISO, EU EN and other related quality requirements, therefore, it modifies the quality grading in accordance with EU EN and other standards; - INTEGRATE the contents in two chapters of 2005-version, ?€?ultrasonic detection and quality grading for butt joint of pressure equipment" and "ultrasonic detection and quality grading for pipe and pressure pipe ring of pressure equipment?€?. Classification shall be conducted according to the type of welded joint, base material nominal thickness and the size of detecting surface curve rate; - Applicable scope of welded joint base material nominal thickness of pressure equipment is expanded from 8 mm ~ 400 mm to 6 mm ~ 500 mm;
- REDESIGN the position and the number of the artificial reflector on CSK-IIA and CSK - IVA blocks. In this way, it not only guarantees the coverage of the detection area coverage, but also is suitable for adjustment of the straight probe benchmark sensitivity. New CSK-IIA block is applicable for work piece with thickness scope of 6 mm ~ 200 mm, mainly referring to the European Union (EN) and Japanese standard (JIS). New CSK-IVA block is applicable for work piece with thickness scope greater than 200 mm ~ 500 mm, and makes improvement on basis of mainly referring to the ASME codes. The block diameter of artificial reflector shall be 6 mm;
- REFINE the weld ultrasonic testing requirements for different types. It involves flat butt joint, T-shaped welded joint, plug-in Angle joint, L-shaped welded joint, placement type pipe and cylinder (or seal-end socket) angle joint, cross welding joint, embedded type pipe and cylinder (or end socket) butt joint etc.
- REDESIGN the GS test block. Increase the circular arc surfaces etc. It is mainly beneficial to adjusting time base of arc probe;
- LIMIT the length of non-crack defect in Zone I in quality grade of weld joint; - ADJUST overall formulation structure involved in weld joint ultrasonic testing. The ultrasonic testing method of connecting pipe and cylinder (head) angle joint, ultrasonic testing method of T-shaped weld joint, ultrasonic testing method and quality grading of surfacing welding layer are included into the annex; - ADD ?€?ultrasonic thickness measurement method for the pressure equipment?€? in accordance with actual testing requirements, including measurement method for stainless steel surfacing layer thickness;
- When pressure equipment is used to conduct ultrasonic detection, ADD failure mode of host materials, components or welded joint which may be caused in use process or analysis results of risk evaluation to select ultrasonic testing method, detection parts and detection proportion.
This Part is proposed by and shall be under the jurisdiction of National Technical Committee on Boiler Pressure Vessel of the Standardization Administration of China (SAC/TC 262).
Drafting organizations of this Part: Hefei General Machinery Research Institute, China Special Equipment Inspection Institute, Shanghai Electric and Nuclear Power Equipment Co., Ltd., China First Heavy Machinery Group Dalian Hydrogenation Reactor Manufacturing Co., Ltd., Jiangsu Special Equipment Safety Supervision and Inspection Research Institute, and Lanzhou Lanshi Heavy Equipment Co., Ltd. Main drafters of this Part: Yan Changzhou, Zheng Hui, Xu Zunyan, Zhou Fengge, Zhou Yufeng, Tao Yuanhong, Zheng Kai, Gu Jie, Zhang Baozhong and Pan Qianghua. The historical version of the standards replaced by this Part are as follows: - JB 4730-1994, JB/T 4730.3-2005.
Nondestructive testing of the pressure equipment -
Part 3: Ultrasonic testing
1 Scope
1.1 This Part of NB/T 47013 specifies the pressure equipment shall adopt ultrasonic testing method and quality grading requirements in which shape A pulse reflection ultrasonic detector is used to test work piece defect.
1.2 This Part is applicable to ultrasonic detection for metal material system pressure equipment with raw materials or components and welded joint, and be applied to ultrasonic detection of metal materials used in the pressure equipment. 1.3 This Part specifies ultrasonic measuring method for thickness of the pressure equipment.
1.4 Ultrasonic detection of supporting parts and structural piece related to the pressure equipment can also refer to this part.
2 Normative references
The following documents are necessary to the application of this document. For all dated references, only the dated edition applies to this document. for all undated references, the latest edition (including all amendments) applies.
GB/T 11259 Non-destructive testing - Practice for fabrication and control of steel reference blocks used in ultrasonic testing
GB/T 12604.1 Non-destructive testing - Terminology - Terms used in ultrasonic testing
GB/T 27664.1 Non-destructive testing - Characterization and verification of ultrasonic test equipment - Part 1: Instruments
GB/T 27664.2 Non-destructive testing - Characterization and verification of ultrasonic test equipment - Part 2: Probes
JB/T 8428 Non-destructive testing - Blocks for ultrasonic testing
JB/T 9214 Non-destructive testing - Practice for evaluating performance characteristics of A scope ultrasonic pulse - Echo testing systems
JB/T 10062 Testing methods for performance of probes used in ultrasonic flaw detection
NB/T 47013.1 Nondestructive testing of pressure equipment
3 Terms and definitions
The following terms and definitions in GB/T 12604.1 and NB/T 47013.1 are applicable to this Part.
3.1
Reduction of backwall echo caused by the presence of discontinuities BG/BF In time of forging test, ratio of the initial backwall echo BG in the intact area close to defect place and the initial backwall echo BF within the defect place, expressed as dB value.
3.2
Grouped discontinuities
In time of forging test, there are five or more defect reflection signals within 50 mm acoustic distance at the same time on the display screening line, or five or more defect reflection signals within the same depth scope were found on the inspection surface of 50 mm ?? 50 mm, and the reflection amplitude are greater than or equal to defect of an equivalent flat bottom hole diameter.
3.3
Reference sensitivity
It refers to sensitivity when height of reference block artificial reflection echo or height of inspected work piece bottom are adjusted to a certain reference.
3.4
Scanning sensitivity
Based on reference sensitivity, dB value (increment) shall be properly improved in accordance with surface condition, testing defect requirements and probe types to conduct sensitivity of actual detection.
3.5
Through thickness dimension of the flaw
The size of defect on the direction of base material nominal thickness. 3.6
Echodynamic patterns
Envelope curve of probe moving distance and the corresponding defect reflector echo envelope changes.
3.7
Base material nominal thickness
Base material nominal thickness is defined as follows:
a) For plate butt joint, when the thickness of the parent materials at both sides of the weld is equal, the base material nominal thickness t is the nominal thickness of the parent materials at thinner side;
b) For plug-in connecting pipe Angle joint, base material nominal thickness t is the nominal thickness of cylinder or end socket; placement connecting pipe and cylinder (or end socket) Angle joint, the base material nominal thickness t is nominal thickness of connecting pipe;
c) For T-shaped weld joint, the base material nominal thickness t is nominal thickness of plate.
4 General requirements
4.1 Inspector
4.1.1 The general requirements for ultrasonic testing personnel shall be in conformity with the relevant provisions in NB/T 47013.1.
4.1.2 Ultrasonic testing personnel shall master basic knowledge about certain metal materials, equipment manufacturing and installation, welding and heat treatment etc., shall be familiar with material, geometry size and acoustic properties of the tested work piece etc., and shall make analysis, judgment and processing to problems found in inspection.
4.2 Testing equipment and instrument
4.2.1 Product quality qualification certificate of instrument and probe It shall at least give out preheating time, low voltage alarm or automatic shutdown voltage with low voltage, pulse repetition frequency, effective output impedance, firing pulse voltage, pulse rise time and firing pulse width (using square wave pulse impact as firing pulse), receiving circuit band and other main performance parameters in product quality certification of ultrasonic testing instrument the probe shall provide center frequency, bandwidth, impedance or static capacitance, relative pulse echo sensitivity and Angle probe beam performance (including probe frontier distance (shot point), Value K (refraction Angle ??) and other major parameters.
4.2.2 Test instrument, probe and combined performance
4.2.2.1 Testing instruments
Use A type pulse reflection ultrasonic detector, and the working frequency shall include at least frequency range of 0.5 MHz ~ 10 MHz based on -3 dB measurement, test conditions and parameters of each performance in the ultrasonic instrument shall meet the requirements of annex A and provide certification documents. The test method shall be based on provisions in GB/T 27664.1.
4.2.2.2 Probe
Circular wafer shall not be greater than 40 mm in diameter, and either side length of square chip shall not be more than 40 mm in general. The performance indicators shall meet the requirements of annex B and provide certification documents. The test method shall be based on provisions in GB/T 27664.2.
4.2.2.3 Combined performance of instrument and probe
4.2.2.3.1 Combined performance of instrument and probe includes horizontal linear, vertical linear, combined frequency, margin sensitivity, blind area (only limited to straight probe) and far field resolution.
4.2.2.3.2 It shall measure combined performance of instrument and probe in the following cases:
a) Newly purchased ultrasonic testing instrument and (or) probe;
b) After instrument and probe are repaired or have major components replaced; c) When inspectors doubted.
4.2.2.3.3 The horizontal linear deviation is not more than 1 %, and vertical linear deviation is not more than 5 %.
4.2.2.3.4 The deviation between combined frequency of instrument and probe and nominal frequency of probe shall not be more than plus or minus 10 %.
4.2.2.3.5 Combined performance of instrument and straight probe shall meet the following requirements:
a) Sensitivity allowance shall not be less than 32 dB;
b) Under reference sensitivity, for probe with nominal frequency of 5 MHz, the blind area is not more than 10 mm; for probe with the nominal frequency of 2.5 MHz, the blind area is not more than 15 mm;
c) The far field resolution of straight probe is not less than 20 dB.
4.2.2.3.6 Combined performance of instrument and angle probe shall meet the following requirements:
a) Sensitivity allowance shall not be less than 42 dB;
b) The far field resolution of angle probe is not less than 12 dB.
4.2.2.3.7 When it reached the maximum detection acoustic distance of the detected work piece, the effective sensitivity allowance shall be not less than 10 dB. 4.2.2.3.8 The testing method for combined frequency of instrument and probe shall be based on provisions in JB/T 10062, and testing method for other combined performance shall refer to provisions in JB/T 9214.
4.2.3 Test block
4.2.3.1 Reference block
4.2.3.1.1 Reference block is a material block with specified chemical composition, surface roughness, heat treatment and geometry, used for evaluating and calibrating ultrasonic testing equipment, which is test block used for calibrating instrument probe system performance. Reference block used by this part is No. 20 high-quality carbon structural steel CSK-IA, DZ-I and DB-P Z20-2.
4.2.3.1.2 See this part for specific shape and size of CSK - IA test block, and see JB/T 9214 for specific shape and size of DZ-O and DB-P Z20-2.
4.2.3.1.3 The manufacture of reference test block shall meet the requirements of JB/T 8428; the manufacturer shall provide product quality certificate and ensure that the maximum reflection amplitude difference shall be less than or equal to 2 dB when each reference test block manufactured is compared to national standard sample or similar reference test block with quantity transmission under same test condition. 4.2.3.2 Reference block
4.2.3.2.1 Reference block refers to test block with similar chemical composition as inspected work piece or material and including reference reflector with clear meaning (reflector shall be made by machining way), to regulate amplitude and acoustic distance of the ultrasonic testing equipment, so as to compare tested defect signal with signals produced by the known reflector, namely test block used for inspection. 4.2.3.2.2 Overall dimensions of reference block shall ...

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