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GB/T 33207-2025 English PDF

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US$279.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 33207-2025: Non-destructive testing - Test method for the oxide stacking in the non-ferromagnetic metal tube in service by magnetic testing
Status: Valid

GB/T 33207: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 33207-2025	279	Add to Cart	3 days	Non-destructive testing - Test method for the oxide stacking in the non-ferromagnetic metal tube in service by magnetic testing	Valid
GB/T 33207-2016	119	Add to Cart	2 days	Non-destructive testing -- Test method for the accumulation of oxide scale in the metal tube in service by magnetic testing	Valid

Basic data

Standard ID: GB/T 33207-2025 (GB/T33207-2025)
Description (Translated English): Non-destructive testing - Test method for the oxide stacking in the non-ferromagnetic metal tube in service by magnetic testing
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: J04
Classification of International Standard: 19.100
Word Count Estimation: 14,135
Date of Issue: 2025-08-29
Date of Implementation: 2025-08-29
Older Standard (superseded by this standard): GB/T 33207-2016
Issuing agency(ies): State Administration for Market Regulation, National Standardization Administration

GB/T 33207-2025: Non-destructive testing - Test method for the oxide stacking in the non-ferromagnetic metal tube in service by magnetic 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/GBT33207-2025
ICS 19.100 CCSJ04 National Standard of the People's Republic of China Replaces GB/T 33207-2016 Non-destructive testing of in-service non-ferromagnetic metals Magnetic detection method for oxide accumulation in pipes Released on August 29, 2025 Implementation on August 29, 2025 State Administration for Market Regulation The National Standardization Administration issued

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 1 4 Detection Principle 1 5 Safety Requirements 2 6 Testing Procedures 2 7 Testing Equipment 3 8 Testing Procedure 4 9 Test result evaluation 6 10 Test records and reports 6 Appendix A (Informative) Example of drawing the RBA-AMP curve 7 Preface This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document replaces GB/T 33207-2016 "Magnetic detection method for non-destructive testing of oxide scale accumulation in in-service metal pipes" and Compared with GB/T 33207-2016, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope has been changed (see Chapter 1, Chapter 1 of the.2016 edition); b) Added the terms "oxide accumulation" and "blockage area ratio" and their definitions (see 3.1 and 3.2); c) The Summary of Methods has been changed (see Chapter 4, Chapter 4 of the.2016 edition); d) Added safety requirements (see Chapter 5); e) Deleted personnel requirements (see Chapter 5 of the.2016 edition); f) Added testing procedures (see Chapter 6); g) Changed the requirements for testing equipment (see Chapter 7, Chapter 7 of the.2016 edition); h) Added calibration specimens (see 7.5); i) Deleted the factors affecting detection (see Chapter 9 of the.2016 edition); j) Changed the pre-test preparation elements (see 8.1, Chapter 6 of the.2016 edition); k) Added the plotting of oxide accumulation blockage area ratio-amplitude curve (see 8.2); l) The scanning method has been changed (see 8.3.1, 8.3 of the.2016 edition); m) Added retest method (see 8.3.2); n) Added test result evaluation (see Chapter 9); o) The test report requirements have been changed (see Chapter 10, Chapter 10 of the.2016 edition). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document is proposed and coordinated by the National Technical Committee for Standardization of Non-destructive Testing (SAC/TC56). This document was drafted by. China Special Equipment Testing and Research Institute, Shanghai Materials Research Institute Co., Ltd., Guangzhou Special Equipment Testing and Research Institute, Xi'an Thermal Engineering Research Institute Co., Ltd., Shanghai Minghua Electric Power Technology Co., Ltd. The main drafters of this document are. Ding Keqin, Jiang Jiansheng, Zhao Na, Li Maodong, Jia Ruofei, Wang Zhijie, Ding Jie, Yang Bo, Zhang Xu, Liu Xuefeng, Yan Aijun, Xin Wei, Hu Yanan, Shi Yisheng, Yan Xiaodong, Duan Peng, and Han Lina. This document was first published in.2016 and this is the first revision. Non-destructive testing of in-service non-ferromagnetic metals Magnetic detection method for oxide accumulation in pipes

1 Scope

This document describes the principles, procedures, and results evaluation of magnetic detection of ferromagnetic oxide buildup in in-service non-ferromagnetic metallic pipes. This document is applicable to the inspection of in-service non-ferromagnetic metal pipes with an outer diameter of 38mm~65mm and a wall thickness of 3.5mm~13mm.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 12604.6 Non-destructive testing terminology Eddy current testing DL/T 882 Terminology of Metals in Thermal Power Plants

3 Terms and Definitions

The terms and definitions defined in GB/T 12604.6 and DL/T 882 and the following apply to this document. 3.1 oxide stacking The oxides in non-ferromagnetic metal pipes are deposited inside the pipes and at the elbows after peeling. 3.2 ratio of blockage area The ratio of the maximum cross-sectional area of oxide accumulation in a non-ferromagnetic metal tube to the flow area in the tube. Note. The maximum cross-sectional area of accumulation refers to the maximum cross-sectional area of oxide accumulation in non-ferromagnetic metal tubes.

4 Detection Principle

The main component of the accumulated oxide is ferromagnetic iron oxide (Fe3O4). The ferromagnetic characteristics can be used to identify and judge the presence and accumulation of oxides in the tube through magnetic induction detection, as shown in Figure 1.The specific method is to A constant strong magnetic field is applied to the outer wall of the non-ferromagnetic metal tube. When there are oxides in the tube, the oxides will be magnetized by the external strong magnetic field. Therefore, the impurities generated by the magnetized oxides are detected from the outside of the pipe wall. The scattered magnetic field signal is converted into an electrical signal to detect the accumulation of ferromagnetic oxides in non-ferromagnetic metal tubes. ......

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Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 33207-2025_English be delivered?

Answer: Upon your order, we will start to translate GB/T 33207-2025_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 33207-2025_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 33207-2025_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.

Question 3: Does the price include tax/VAT?

Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countries

Question 4: Do you accept my currency other than USD?

Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.

Question 5: Should I purchase the latest version GB/T 33207-2025?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 33207-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically.