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GB/T 17005-2019 English PDF

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GB/T 17005-2019: General requirements for impressed current cathodic protection system of coastal structures
Status: Valid

GB/T 17005: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 17005-2019English359 Add to Cart 4 days [Need to translate] General requirements for impressed current cathodic protection system of coastal structures Valid GB/T 17005-2019
GB/T 17005-1997English439 Add to Cart 3 days [Need to translate] Impressed current cathodic protection system for coastal structures Obsolete GB/T 17005-1997

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Basic data

Standard ID GB/T 17005-2019 (GB/T17005-2019)
Description (Translated English) General requirements for impressed current cathodic protection system of coastal structures
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard A29
Classification of International Standard 47.020.99
Word Count Estimation 18,185
Date of Issue 2019-06-04
Date of Implementation 2020-01-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 17005-2019: General requirements for impressed current cathodic protection system of coastal structures


---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.
General requirements for impressed current cathodic protection system of coastal structures ICS 47.020.99 A29 National Standards of People's Republic of China Replace GB/T 17005-1997 Coastal facility with current cathode General requirements for protection systems Published on.2019-06-04 2020-01-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 protection potential criterion 1 4 technical requirements of the system 2 4.1 System Composition 2 4.2 Power supply equipment 2 4.3 Auxiliary Anode 2 4.4 Reference electrode 2 4.5 Anode shielding layer 3 4.6 Cable 3 4.7 shaft grounding device 3 5 System Design 3 5.1 General Provisions 3 5.2 Protection current calculation 3 5.3 Protection Area Calculation 4 5.4 Protection current density selection 4 5.5 Power Equipment Capacity 4 5.6 Auxiliary Anode 5 5.7 Reference electrode 5 5.8 anode shielding layer 6 5.9 shaft grounding device 6 6 Installation and inspection 6 6.1 Power supply unit 6 6.2 Auxiliary Anode 6 6.3 Reference electrode 7 6.4 shaft grounding device 7 6.5 cable 7 6.6 Installation Check 7 7 Operation, maintenance and testing 7 7.1 System Operation 7 7.2 System Maintenance 7 7.3 Protection effect detection 8 Appendix A (Normative Appendix) Determination of protective potential and correlation of steel in seawater with different reference electrodes Figure 9 Appendix B (Normative Appendix) Calculation of water resistance of a single anode 10 Appendix C (Normative Appendix) Anode Mounting Structure Schematic 11 Appendix D (Normative Appendix) Schematic diagram of the installation structure of the shaft grounding device 14

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009. This standard replaces GB/T 17005-1997 "Additive current cathodic protection system for coastal facilities". This standard and GB/T 17005- Compared with.1997, the main technical changes are as follows. --- The standard scope of application has increased the drum rotary filter for nuclear power plants (see Chapter 1). --- Revised the protective potential range of carbon steel (see 3.1,.1997 edition 3.1); increased the protection potential of stainless steel, copper and copper alloy Range (see 3.2~3.4). --- Revised the composition of the cathodic protection system (see 4.1, Chapter 4 of the.1997 edition); supplemented the power supply mode of the power supply (See 4.2); Added titanium-based metal oxide anodes and their performance parameters, and moved the anode type and performance into Chapter 4 (See Table 1 in 4.3.1, Table 2 in Table 5.2.1 of.1997); modified design parameters for different reference electrodes, reference electrode class Type and main performance related content moved into Chapter 4 (see Table 2 in 4.4.1, Table 4 in.1997 5.4); added shaft grounding Set the potential difference between the protected body and the protected body (see 4.7.3). --- Increased general provisions for the design of cathodic protection systems (see 5.1); increased protection current density of drum-shaped rotary screens (see 5.4) Table 3); increased design margin for power supply output current (see 5.5.1); increased number of auxiliary anodes for drum rotary screen Quantity (see 5.6.2.6); increased design requirements for the selection, number and mounting position of the reference electrode (see 5.7.2, 5.7.3); Thickness of the anode shield (see 5.8). --- Revised Chapter 6 title (see Chapter 6, Chapter 6 of the.1997 edition); added power supply installation requirements (see 6.1); The relevant contents of the installation of the auxiliary anode, the reference electrode, the anode shielding layer and the shaft grounding device are moved into Chapter 6 (see 6.2, 6.3, 6.4, 6.5, 4.3, 4.4, 4.5, 4.6) of the.1997 edition; increased the arrangement and installation structure of the auxiliary anode of the drum-shaped rotary screen (see 6.2.8); The installation structure of the reference electrode of the drum rotary filter is added (see 6.3.6); the installation structure of the shaft grounding device is added (see Appendix) D); Removed the requirements for the manufacturer in the acceptance rules (see 6.1 of the.1997 edition). --- Merged Chapters 7 and 8 of the original standard (see Chapter 7, Chapter 7, Chapter 8 of the.1997 edition); modified the potential to be satisfied Technical requirements (see 7.3.1.1, 7.3.1.2,.1997 editions 8.1.1, 8.1.2); increased requirements for cathodic protection potential measurement (see 7.3.1.3); modified corrosion weight loss test (see 7.3.2,.1997 edition 8.2); revised test piece weighing accuracy and protection meter Calculate the formula (see 7.3.2, 8.2 of the.1997 edition). This standard is proposed and managed by the National Marine Ship Standardization Technical Committee (SAC/TC12). This standard was drafted. China Shipbuilding Industry Corporation 725th Research Institute, Qingdao Shuangrui Marine Environmental Engineering Co., Ltd., China Power Engineering Consulting Group East China Power Design Institute Co., Ltd., China Nuclear Power Engineering Co., Ltd., Jiangsu Nuclear Power Co., Ltd., China Power Power Engineering Consulting Group North China Electric Power Design Institute Co., Ltd., China Power Engineering Consulting Group Northeast Electric Power Design Institute Co., Ltd., China Energy Construction Group Shenyang Electric Power Machinery General Factory Co., Ltd., China Energy Construction Group Guangdong Electric Power Design and Research Institute Co., Ltd., China Power Engineering Advisory Group Southwest Electric Power Design Institute Co., Ltd. The main drafters of this standard. Wang Tingyong, Wang Hui, Zhao Chao, Wang Xiangchen, Xu Likun, Wang Mingren, Bai Wei, Zhang Yungan, Zeng Xiaochao, Wang Weimin, Fu Bin, Mao Weibing, Liao Nei Ping. The previous versions of the standards replaced by this standard are. ---GB/T 17005-1997. Coastal facility with current cathode General requirements for protection systems

1 Scope

This standard specifies the protection potential criteria for the current cathodic protection system in the coastal facility, the technical requirements of the system, system design, and installation. Requirements for inspection, operation, maintenance and testing. This standard is applicable to the impressed current of seawater pipelines, seawater pumps, drum rotary filters, condensers, floating docks and other coastal facilities in seawater. Cathodic protection. Impressed current cathodic protection for other devices in seawater and for circulating fresh water, high brine containing water systems and underwater facilities Can also refer to use.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 3108 ship external current cathodic protection system GB/T 7387 Marine reference electrode technical conditions GB/T 7388 marine auxiliary anode technical conditions GB/T 7788 General technical conditions for anode screen coatings for ships and marine engineering CB*3220 marine potentiostat technical conditions

3 protection potential criterion

3.1 A facility or system consisting of carbon steel or carbon steel and various materials such as stainless steel, cast iron, and copper alloy to protect electricity in an aerobic environment. The position should be -0.80V~-1.05V (relative to the silver/silver chloride reference electrode, the same below); the lack of sulfate-reducing bacteria and sulfides In the oxygen environment, the protection potential should reach -0.90V~-1.05V; for steel grades with a yield strength of not less than 550MPa, cathodic protection should be applied. The most negative potential of the time should not cause hydrogen embrittlement. 3.2 Equipment, components and piping made of stainless steel, the cathodic protection potential criteria are as follows. a) When the austenitic stainless steel pitting resistance equivalent is not less than 40, the protection potential should reach -0.30V~-1.05V; b) When the austenitic stainless steel pitting resistance equivalent is less than 40, the protection potential should reach -0.50V~-1.05V; c) For corrosion resistant alloy steels such as duplex stainless steel or martensitic stainless steel, the upper limit of the protection potential is -0.50V. If the strength of the material, Factors such as metallurgical conditions and stress state have the risk of hydrogen embrittlement and hydrogen-induced stress cracking of the protected body, then the protective potential The limit should not be reduced to -0.80V. Note. The pitting resistance equivalent PREN is a value calculated based on the mass fraction of certain elements in the metal. Generally, the higher the PREN value, the higher the pitting resistance. Well, PREN = Cr% 3.3 × (Mo 0.5W) % 16 × N%. 3.3 Equipment, components and piping made of copper and copper alloys shall have a protection potential range of -0.45V to -0.60V. 3.4 Equipment consisting of titanium and steel, cast iron, copper alloy and other materials, the surface potential of titanium should not be reduced to -0.75V.

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