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GB/T 4950-2021 English PDF

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Q: Should I purchase the latest version GB/T 4950-2021?

Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4950-2021 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.

US$999.00 · In stock
Delivery: <= 7 days. True-PDF full-copy in English will be manually translated and delivered via email.
GB/T 4950-2021: Sacrificial anode of zinc alloy
Status: Valid

GB/T 4950: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 4950-2021	999	Add to Cart	7 days	Sacrificial anode of zinc alloy	Valid
GB/T 4950-2002	599	Add to Cart	3 days	Sacrificial anode of Zn-Al-Cd alloy	Obsolete
GB/T 4950-1985	639	Add to Cart	5 days	Sacrificial anode of Zn-Al-Cd alloy	Obsolete

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GB/T 5270 GB/T 4955 GB/T 4957 GB/T 4948

Basic data

Standard ID: GB/T 4950-2021 (GB/T4950-2021)
Description (Translated English): Sacrificial anode of zinc alloy
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: A29
Word Count Estimation: 50,552
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration

GB/T 4950-2021: Sacrificial anode of zinc alloy

---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.
Sacrificial anode of zinc alloy ICS 47.020.05 CCSA29 National Standards of People's Republic of China Replace GB/T 4950-2002, GB/T 4951-2007 Zinc alloy sacrificial anode Released on 2021-08-20 2022-03-01 implementation State Administration of Market Supervision and Administration Issued by the National Standardization Management Committee

Foreword Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 1 4 Symbol 1 5 Classification, model and specifications 3 6 Requirements 16 7 Test method 18 8 Inspection rules 19 9 Marking, packaging, transportation and storage 20 Appendix A (Normative) Chemical Analysis Methods of Zinc Alloy Sacrificial Anode 21 Appendix B (Normative) Contact resistance measurement method 44

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents" Drafting. This document replaces GB/T 4950-2002 "Zinc-aluminum-cadmium alloy sacrificial anode" and GB/T 4951-2007 "Zinc-aluminum-cadmium alloy sacrificial anode" Polar Chemical Analysis Method. This document is based on GB/T 4950-2002, which integrates the content of GB/T 4951-2007, and Compared with GB/T 4950-2002, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Added a chapter "Symbols" (see Chapter 4); b) The classification method of zinc anodes is changed (see 5.1, 4.1 of GB/T 4950-2002); c) The model representation method of zinc anode is changed (see 5.2, 4.2 of GB/T 4950-2002); d) The structural type and parameters of the bolted zinc anode for the tank have been added (see Table 7 and Figure 6); e) Added the classification, specifications and parameters of strip zinc anodes for storage tanks and buried pipelines (see 5.3.5 and 5.3.6); f) The chemical composition and electrochemical performance of two zinc anodes have been added (see 6.2 and 6.3); g) The number and requirements of samples for type inspection of zinc anodes are changed (see 8.2.3, 7.2.3 and 7.2.4 of GB/T 4950-2002); h) The chemical analysis method of zinc alloy sacrificial anode has been added (see Appendix A); i) The method of measuring the contact resistance between the sacrificial anode body and the iron foot has been changed (see Appendix B.2, Appendix A.1 of GB/T 4950-2002). Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed and managed by the National Ocean Shipping Standardization Technical Committee (SAC/TC12). Drafting organizations of this document. The 725th Research Institute of China Shipbuilding Industry Corporation (Luoyang Ship Material Research Institute), Qingdao Shuangrui Ocean Ring Environmental Engineering Co., Ltd. The main drafters of this document. Ma Li, Zhang Haibing, Liu Pan, Sun Mingxian, Du Mifang, Li Weili, Li Jingbin, Xing Shaohua, Wang Hongfeng, Xu Likun, Lin Cunguo, Liu Zhaohui, Hou Jian, Yan Yonggui, Lu Tongjun. The previous versions of the documents replaced by this document are as follows. ---GB/T 4950, first published in 1985, first revised in.2002; ---GB/T 4951, first published in 1985, first revised in.2007. Zinc alloy sacrificial anode

1 Scope

This document stipulates the classification, model and specifications, requirements, test methods, inspection rules of zinc alloy sacrificial anodes (hereinafter referred to as zinc anodes) And marking, packaging, transportation and storage. This document applies to zinc used for cathodic protection of steel structures in media with a resistivity of less than 15Ω·m (including seawater, sea mud, soil, etc.) Design, manufacture, inspection and storage of anodes, including ships, port engineering facilities, marine engineering, buried metal pipelines, storage tanks, seawater cooling water systems Zinc anodes for cathodic protection of steel structures.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to This document. GB/T 470-2008 Zinc Ingot GB/T 700 carbon structural steel GB/T 1196-2017 Aluminum ingots for remelting GB/T 1499.2 Steel for reinforced concrete Part 2.Hot-rolled ribbed steel bars GB/T 6682 Analytical laboratory water specifications and test methods GB/T 8170 Numerical rounding rules and the expression and determination of limit values GB/T 8923.1-2011 Visual assessment of surface cleanliness of steel surface treatment before coating-Part 1.Uncoated The corrosion level and treatment level of the steel surface and the steel surface after the original coating has been completely removed GB/T 17848 Electrochemical performance test method of sacrificial anode CB/T 3764 Metal coating and chemical coating thickness series and quality requirements YS/T 72-2014 Cadmium Ingot

3 Terms and definitions

The following terms and definitions apply to this document. 3.1 Practical currentcapacity Actually measured electricity produced by sacrificial anode consuming unit mass. 3.2 Current efficiency The ratio of the actual capacitance of the sacrificial anode to the theoretical capacitance.

4 symbols

The symbols listed in Table 1 apply to this document. ......

Image

Tips & Frequently Asked Questions:

Question 1: How long will the true-PDF of GB/T 4950-2021_English be delivered?

Answer: Upon your order, we will start to translate GB/T 4950-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 4 ~ 7 working days. The lengthier the document the longer the lead time.

Question 2: Can I share the purchased PDF of GB/T 4950-2021_English with my colleagues?

Answer: Yes. The purchased PDF of GB/T 4950-2021_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 4950-2021?

Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 4950-2021 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.