GB/T 32552-2016 English PDFUS$134.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 32552-2016: [Including 2021XG1] Automated full peripheral ultrasonic thickness testing of seamless and welded (except submerged arc-welded) steel tubes Status: Valid
Basic dataStandard ID: GB/T 32552-2016 (GB/T32552-2016)Description (Translated English): [Including 2021XG1] Automated full peripheral ultrasonic thickness testing of seamless and welded (except submerged arc-welded) steel tubes Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: H26 Classification of International Standard: 77.040.20 Word Count Estimation: 7,728 Date of Issue: 2016-02-24 Date of Implementation: 2016-11-01 Regulation (derived from): National Standard Announcement No Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China GB/T 32552-2016: [Including 2021XG1] Automated full peripheral ultrasonic thickness testing of seamless and welded (except submerged arc-welded) steel tubes---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. [2021XG1] Automated full peripheral ultrasonic thickness testing of seamless and welded (except submerged arc-welded) steel tubes ICS 77.040.20 H26 National Standards of People's Republic of China Automatic for seamless and welded steel pipes (except submerged arc welding) Full circle ultrasonic thickness detection (ISO 10893-12.2011, IDT) Released on.2016-02-24 2016-11-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Issued by the National Standardization Administration of China Automatic for seamless and welded steel pipes (except submerged arc welding) Full-circumference ultrasonic thickness detection 1 ScopeThis standard specifies the testing requirements and testing methods for the full-circumference ultrasonic wall thickness measurement of seamless and welded steel pipes (except submerged arc welded steel pipes) And verification procedures. Note 1.Full circle inspection does not mean 100% scanning of the steel pipe surface. Note 2.The thickness measurement can be performed simultaneously with the full-circle delamination test (ISO 10893-8) that can meet the test requirements using the same ultrasonic probe. In this case, the root According to the requirements of ISO 10893-8, the coverage rate of the steel pipe surface scanning inspection is determined by the minimum layer size to be detected. This standard is also applicable to the detection of circular hollow profiles. The applicable thickness measurement range of this standard is that the nominal outer diameter is greater than or equal to 25.4mm and the minimum wall thickness is 2.6mm, unless otherwise agreed.2 Normative referencesThe following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this article Pieces. For undated reference documents, the latest version (including all amendments) is applicable to this document. ISO 5577 Non-destructive testing Ultrasonic testing term (Non-destructive testing-Ultrasonic inspection-Vocab- ulary) ISO 9712 Non-destructive testing-Qualification and certification of NDT personnel qualifications (Non-destructive testing-Qualification and certificationofNDTpersonnel) ISO 10893-8 Non-destructive testing of steel pipes Part 8.Automatic ultrasonic testing of seamless and welded steel pipes for delamination defects (Non-de- structivetestingofsteeltubes-Part 8.Automatedultrasonictestingofseamlessandweldedsteel tubesforthedetectionoflaminarimperfections) ISO 11484 Employer qualification system for non-destructive testing personnel (NDT) of steel products [Steelproducts-Employer'squalifi- cationsystemfornon-destructivetesting(NDT)personnel]3 Terms and definitionsThe following terms and definitions defined by ISO 5577 and ISO 11484 apply to this document. 3.1 Referencetube A steel pipe with a certain length for calibration purposes. 3.2 Referencesample Specimen used for calibration purposes (ie a section of tube, plate or strip). Note. This standard only uses the term "comparative sample tube", which includes "comparative sample". 3.3 Tube A long hollow product with a cross section of any shape, with open ends. 3.4 Seamlesstube Hollow pipes are perforated from a solid material, and the final size of the pipe is obtained by further hot processing or cold processing. 3.5 Weldedtube The hollow tube made by welding after the strip is crimped may also undergo further hot processing or cold processing to obtain the final size. 3.6 Electricweldedtube A tube made through a continuous and uninterrupted pressure welding process. First, the strip is rolled into a hollow tube shape by cold forming, and then adjacent While pressing the edges of the plates together, they are heated by high-frequency or low-frequency currents. Note. The current can be introduced either by direct contact or by induction. 3.7 Manufacturer An organization that produces products in accordance with relevant standards and declares that the delivered products comply with relevant standards. 3.8 Agreement The contract signed between the manufacturer and the buyer at the time of inquiry and ordering.4 General requirements4.1 Ultrasonic testing should be performed after all production processes of steel pipes (such as rolling, heat treatment, cold and hot working, sizing and straightening, etc.) are completed. Unless otherwise specified by the product standard or when the manufacturer and the buyer have agreed otherwise. 4.2 The steel pipe to be inspected should be straight enough to ensure the effectiveness of the inspection. There must be no foreign matter on the surface of the steel pipe that will affect the test results. 4.3 Ultrasonic testing should be under the supervision of the corresponding qualified personnel designated by the manufacturer, by fully trained and in accordance with ISO 9712, ISO 11484 or other equivalent standards are implemented by personnel who have obtained qualification certificates. If third-party testing is adopted, the buyer should negotiate with the manufacturer And reach an agreement. The employer shall issue the operation authorization certificate in accordance with the procedure document. Non-destructive testing operations should be approved by employers with level 3 non-destructive testing qualifications Member authorization. Note. The regulations for Level 1, Level 2 and Level 3 can be found in relevant standards, such as ISO 9712 and ISO 11484.5 Detection method5.1 Piezoelectric or electromagnetic transducers shall be used and ultrasonic single pulse or multi-pulse echo method shall be used to detect steel pipes. The propagation direction of the ultrasonic wave should be the same as The surface of the steel pipe is vertical to determine whether the wall thickness of the steel pipe meets the specified requirements. 5.2 During the inspection, the inspected steel pipe and the probe should maintain relative movement (except for the case of Note 2 in Chapter 1) and ensure that the surface of the steel pipe is along the length of the pipe. The direction is scanned in an equidistant spiral path. The minimum scanning coverage is determined by the manufacturer according to the production process, but it should not be less than the surface of the steel pipe 10% of the product, unless otherwise specified by the product standard or otherwise agreed between the manufacturer and the buyer. Note. Other scanning methods agreed between the buyer and the manufacturer can be used. 5.3 The recommended maximum width of a single transducer or the recommended maximum width of each excitation element of a phased array transducer does not exceed in any direction 25mm. The manufacturer can also use a larger probe, as long as it proves that it can detect the calibration standard used, but it should issue a relevant certificate. 5.4 The equipment should be able to pass the automatic trigger/alarm level connected to the marking device/sorting mechanism to classify the inspected steel pipes as qualified or acceptable. Suspicious.6 Comparative sample tube6.1 The comparison sample pipe (or the steel pipe scanning part) should have the same nominal diameter and wall thickness, surface condition, heat treatment and delivery as the steel pipe to be inspected State (such as rolling, normalizing, quenching and tempering) and similar acoustic properties (such as sound velocity, attenuation coefficient). 6.2 The comparison sample tube (or machined comparison sample, test block, hollow steel rod) should meet one of the following conditions and be selected by the manufacturer. a) Predicted thickness with accuracy better than ±0.1mm in the known area; b) Have a section processed according to the minimum thickness specified, or process a section with a minimum thickness and a section between the maximum and minimum thickness. Thickness section between. The wall thickness tolerance of the comparison sample tube used to verify the ultrasonic equipment is ±0.05mm or ±0.2%, whichever is The larger one.7 Equipment verification and verification7.1 Before starting the test each time, the equipment should be statically checked with a comparison sample tube to confirm that the accuracy can be better than ±0.10mm or ±2% (The larger one) indicates the wall thickness value of the comparison sample tube, and can trigger/alarm when the thickness exceeds the specified thickness. The manufacturer should be able to prove that the test results during the production test are consistent with the static verification. 7.2 In the production inspection, the relative rotation and transmission speed of the steel pipe should be selected so that the surface of the steel pipe is scanned according to the requirements of 5.2.Relative in detection The speed change of movement should not exceed ±10%. 7.3 In the production inspection where the diameter, wall thickness and steel grade of the steel pipe are constant, the equipment should be calibrated with the reference sample tube at intervals. Test. Equipment verification should be carried out at least every 4h, and should be carried out when equipment operators change shifts or at the beginning and end of testing check. 7.4 If the parameters of the initial calibration are changed, the equipment should be re-calibrated. 7.5 When the verification result in the production inspection (after taking into account the additional accuracy tolerance given in 7.6) does not meet the requirements, All steel pipes tested after the second calibration should be re-tested after the equipment is re-calibrated. 7.6 Taking into account the drift of the instrument, in the equipment calibration in the production test, a wall thickness accuracy tolerance of 1% or 1% should be added on the basis of 7.1. 0.05mm, whichever is larger. 7.7 According to the agreement between the manufacturer and the buyer, it should be able to prove that the equipment can detect failures at the transmission and/or rotation speed and pulse repetition frequency used. Qualified wall thickness.8 Judgment8.1 The steel pipe (see 7.1) that does not generate a trigger/alarm shall be deemed to have passed the inspection. 8.2 The steel pipe (see 7.1) that generates the trigger/alarm shall be regarded as suspicious. It is up to the manufacturer to decide whether to retest. When retesting, such as If the signal is lower than the trigger/alarm level for two consecutive times, it will be regarded as passing the detection, otherwise it will be regarded as suspicious. 8.3 For suspicious products, according to the requirements of product standards, one or more of the following methods can be used for processing. a) If the manufacturer can prove that the trigger/alarm is caused by multiple small defects (such as accumulation of inclusions) instead of causing failure If there is a defect with a large area or a combined area, the steel pipe shall be deemed to have passed the inspection; b) If feasible, use appropriate methods to grind the suspicious parts of the steel pipe whose thickness exceeds the upper limit tolerance. After testing, if the remaining wall thickness is Within the tolerance range, the steel pipe is considered to pass the test; c) Removal of suspicious parts; d) The steel pipe failed the test.9 Test reportAccording to the request of the purchaser, the manufacturer shall provide the purchaser with a test report, and the test report shall at least include the following content. a) Number of this standard; b) Declaration of conformity; c) Any deviation from meeting relevant agreements or following prescribed procedures; d) The brand and specification of the product; e) The category and detailed parameters of the detection technology; f) The verification method of the equipment used; g) Description of the comparison sample; h) Date of inspection; i) Operators and their technical qualifications. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 32552-2016_English be delivered?Answer: Upon your order, we will start to translate GB/T 32552-2016_English as soon as possible, and keep you informed of the progress. 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