GB/T 25151.1-2010Fabrication and inspection method for high pressure urea equipment - Part 1: Ultrasonic examination on the automatic strip overlay welds of stainless steel (English PDF)
尿素高压设备制造检验方法 第1部分：不锈钢带极自动堆焊层超声波检测
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 26, 2010
Implementation date
March 1, 2011
Scope
GB/T 25151.1-2010 is the English-translated version of 尿素高压设备制造检验方法 第1部分：不锈钢带极自动堆焊层超声波检测.
GB/T 25151.1-2010 is the Chinese standard "Fabrication and inspection method for high pressure urea equipment - Part 1: Ultrasonic examination on the automatic strip overlay welds of stainless steel".
Its scope clause reads: This section GB/T 25151 specifies the use of pulse reflection method, high pressure equipment for urea automatic welding stainless steel electrode layer in contact with Ultrasonic detection and thickness measurement.
This section applies to the surfacing layer thickness of not less than 3mm stainless steel pole automatic surfacing ultrasonic testing. Its clauses include operator; flaw detector and probe.
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Document preview — GB/T 25151.1-2010
National Standard of the People's Republic of China
- ICS
- 71.120.10
- Classification
- G 93
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 operator
- 4 flaw detector and probe
1 Scope
This section GB/T 25151 specifies the use of pulse reflection method, high pressure equipment for urea automatic welding stainless steel electrode layer in contact with
Ultrasonic detection and thickness measurement.
This section applies to the surfacing layer thickness of not less than 3mm stainless steel pole automatic surfacing ultrasonic testing.
2 Normative references
The following documents contain provisions which, through reference GB/T 25151 in this section constitute provisions of this section. For dated reference documents
Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section
Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section.
JB/T 10061 A-mode pulse reflection type ultrasonic flaw detector General technical requirements
JB/T 10062 ultrasonic flaw detection probe performance test method
"Special Equipment NDT personnel appraisal and supervision rules," the State Administration of Quality Supervision, Inspection and Quarantine Order No. 248 (2003)
3 operator
3.1 Qualification
Surfacing detection by pressing the "special equipment NDT personnel appraisal and supervision rules" training, after passing the examination, or get II grade
II level and above qualifications ultrasonic testing to detect officer.
3.2 Skills
The operator should have detected the workpiece material, welding technology, the site may have defects, etc., and can be fully based on the reflected wave
Co judgment.
4 flaw detector and probe
4.1 Sensitivity Surplus
Reaching the detectors sensitivity margin is the subject of the workpiece at the maximum sound path should be at least 20dB.
4.2 Attenuator error
The amount of attenuation flaw detector should have no less than 80dB adjustable attenuator accuracy of any adjacent 12dB error is within ± 1dB.
Maximum cumulative error is less than 1dB.
4.3 Probe Type
4.3.1 narrow pulse probe
Recommended use narrow pulse frequency 5MHz, wafer diameter of not more than 14mm (when the substrate thickness from one side of the detection or measurement can use this
Probe).
4.3.2 double crystal straight probe
Twice the angle beam shall meet effectively the sound field to cover the entire detection area, and allows the probe to the region with the greatest sensitivity. Transducer
The total area should not exceed 325mm2. Nominal frequency of use of 2.5MHz. In order to achieve the desired resolution, may be employed
GB/T 23711.8-2019 | HG/T 4752-2014 | HG/T 20584-2011 | GB/T 25151.6-2014 | GB/T 25151.4-2010 | GB/T 25151.3-2010 | […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
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Related Standards
GB/T 25151.2-2010 — Fabrication and inspection method for high pressure urea equipment - Part 2: Selective corrosion examination and metallography examination for ultra low-carbon chromated nickel molybdenum austenitic stainless steel of urea grade
GB/T 25151.3-2010 — Fabrication and inspection method for high pressure urea equipment - Part 3: Intergranular corrosion tendency test for ultra low-carbon chromated nickel molybdenum austenitic stainless steel of urea grade
GB/T 25151.4-2010 — Fabrication and inspection method for high pressure urea equipment - Part 4: Intergranular corrosion tendency test specimen preparation for ultra low-carbon chromated nickel molybdenum austenitic stainless steel of urea grade
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