GB/T 37122-2018 PDF EnglishUS$150.00 · In stock · Download in 9 seconds
GB/T 37122-2018: Non-destructive testing - Phantom of maximum detectable steel thickness for industrial computed tomography (CT) testing Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 37122-2018: Non-destructive testing - Phantom of maximum detectable steel thickness for industrial computed tomography (CT) testing---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT37122-2018 NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 19.100 J 04 Non-destructive testing - Phantom of maximum detectable steel thickness for industrial computed tomography (CT) testing ISSUED ON: DECEMBER 28, 2018 IMPLEMENTED ON: JULY 01, 2019 Issued by: State Administration for Market Regulation; Standardization Administration of the People's Republic of China. Table of ContentsForeword ... 3 1 Scope ... 4 2 Normative references ... 4 3 Terms and definitions ... 4 4 Classification, types and marks ... 4 5 Technical requirements ... 9 6 Inspection methods ... 13 7 Inspection rules ... 15 8 Marks and labels ... 17 9 Packaging, transport and storage ... 17 Non-destructive testing - Phantom of maximum detectable steel thickness for industrial computed tomography (CT) testing1 ScopeThis Standard specifies the classification, types and marks, technical requirements, inspection methods, inspection rules, packaging, transport and storage for phantom of maximum detectable steel thickness for industrial computed tomography (CT) testing. This Standard is applicable to type inspection and exit-factory inspection for phantom of maximum detectable steel thickness for industrial CT testing of which radian energy is 225keV and above. This Standard can also be used as the basis for acceptance of user orders.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 34365, Non-destructive testing - Terminology - Terms used in industrial computed tomography testing GB/T 37158, Non-destructive testing - Test method for measuring the maximum detectable steel thickness by industrial computed tomography (CT)3 Terms and definitionsFor the purposes of this document, the terms and definitions defined in GB/T 34365 and GB/T 37158 apply.4 Classification, types and marks4.1 Classification 4.1.1 Overview provides marking pattern for ring of phantom of maximum detectable steel thickness. 4.3.2 Pattern 1: XD-I-0200 GB Where, XD - Line-pair phantom; I - I-type line-pair phantom; 0200 - Minimum sheet thickness is 0.20mm; GB - Comply with this Standard. 4.3.3 Pattern 2: YK-II-0400 GB Where, YK - Round-hole phantom; II - II-type round-hole phantom; 0400 - Minimum aperture is 0.40mm; GB - Comply with this Standard. 4.3.4 Pattern 3: YH-090-110 GB Where, YH - Ring; 090 - Inner diameter of ring is 90mm; 110 - Outer diameter of ring is 110mm; GB - Comply with this Standard.5 Technical requirements5.1 Ring 5.2.2.8 Tolerance of sheet thickness in line-pair phantom T does not exceed ±0.005mm. Tolerance of clearance width of adjacent sheets T is ±0.01mm. 5.2.2.9 Measured value of sheet length in line-pair phantom does not exceed ±0.05mm. 5.2.3 Materials 5.2.3.1 Substrate of line-pair phantom is made of No. 35 high-quality carbon structural steel or materials of equivalent performance. Substrate material of slot part of internal rectangle is transparent resin or air. 5.2.3.2 Sheet in line-pair pair is made of 65Mn or material of equivalent performance. 5.2.3.3 The material of line-pair phantom sealing cover is polymethyl methacrylate (plexiglass). Use glue to bond along with the edge of cylinder. Bonding shall not affect the transparency of the cover of substrate slot part. 5.3 Round-hole phantom 5.3.1 Appearance 5.3.1.1 Round-hole phantom shall use the upper and lower covers made of transparent material to bond, playing a role as sealing. There is no debris in the round hole. It shall mark testing position. 5.3.1.2 The marking content and position shall be correct. It shall use laser engravement in obvious places. The package does not block it. 5.3.1.3 The surface of round-hole phantom shall be clean, smooth and rust- proof. 5.3.2 Size 5.3.2.1 Outer diameter of round-hole phantom is D0. Tolerance is mm. 5.3.2.2 See Table 4 for models of round-hole phantom and corresponding outer diameter sizes. Table 4 -- Models of round-hole phantom and corresponding outer diameter sizes Model I-type II-type Outer diameter D0 mm 20 30 5.3.2.3 Thickness of sealing cover of round-hole phantom δ is 1mm. 6.2.1.2 For exit-factory inspection, it shall take three directions at an angle of 60° on the circumference of the ring to measure. 6.2.2 Inner diameter of ring d 6.2.2.1 Use an appropriate method of which error is not greater than 0.02mm to measure. 6.2.2.2 For exit-factory inspection, it shall take three directions at an angle of 60° on the circumference of the ring to measure. 6.3 Line-pair phantom 6.3.1 Sheet thickness T 6.3.1.1 Use an appropriate method of which error is not greater than 0.001mm to measure. 6.3.1.2 For type inspection, it shall appropriately select two points in upper and lower parts as measurement points on each metal sheet. And horizontally select three different positions at left, center and right at each measurement point. 6.3.1.3 For exit-factory inspection, it may measure the thickness of all metal sheets before line-pair phantom assembly. 6.3.2 Sheet spacing 2T 6.3.2.1 Use an appropriate method of which error is not greater than 0.005mm to measure. 6.3.2.2 For type inspection, it shall appropriately select two points in upper and lower parts as measurement points. And horizontally select three different positions at left, center and right at each measurement point. 6.3.2.3 For exit-factory inspection, it shall measure spacing of each two adjacent sheets. 6.3.3 Sheet length L 6.3.3.1 Use an appropriate method of which error is not greater than 0.02mm to measure. 6.3.3.2 For exit-factory inspection, it shall appropriately select three positions on each metal sheet as measurement points to measure. And randomly extract 50% of metal sheet for length measurement. 6.3.4 Outer diameter of line-pair phantom D0 6.3.4.1 Use an appropriate method of which error is not greater than 0.02mm to measure. 6.3.4.2 For exit-factory inspection, it shall take three directions at an angle of 60° on the circumference to measure. 6.4 Round-hole phantom 6.4.1 Aperture d0 6.4.1.1 Use an appropriate method of which error is not greater than 0.02mm to measure. 6.4.1.2 For type inspection, it shall measure each round hole in two directions perpendicular to each other on the circumference. 6.4.1.3 For type inspection, it shall measure each round hole in two directions perpendicular to each other on the circumference. 6.4.2 Hole spacing S0 6.4.2.1 Use an appropriate method of which error is not greater than 0.02mm to measure. 6.4.2.2 For type inspection, it shall measure spacing between each adjacent two holes. 6.4.2.3 For exit-factory inspection, it shall measure spacing between each adjacent two holes. 6.4.3 Outer diameter of round-hole phantom D0 6.4.3.1 Use an appropriate method of which error is not greater than 0.02mm to measure. 6.4.3.2 For exit-factory inspection, it shall take three directions at an angle of 60° on the circumference to measure. 6.4.4 Substrate round hole of round-hole phantom and reference plane perpendicularity Use an appropriate method of which error is not greater than 0.02mm to measure.7 Inspection rules7.1 Classification of inspection 7.1.1 Type inspection ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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