Some standard content:
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Registration No.: 8179-2001
Petroleum and Natural Gas Industry Standard of the People's Republic of China P
SY/T 0096--2000
Technical specification of impressedcurrent deep groundbeds
2000 - 12 - 25 Issued
2001-06-01 Implementation
National Petroleum and Chemical Industry Bureau
Selection principles
Design technical requirements
Environmental considerations during design
Data collection for deep anode bed design
Anode well
Material selection
Installation method
#Underground testing
Cathode assembly
Anode installation
Closed-cell anode bed Installation of bed exhaust device
Filling of closed-cell anode bed filler
Installation of junction box
Operation and maintenance,
6.1 Operation
6.2 Troubleshooting
Standard terminology
Appendix Technical Specification for Forced Current Deep Anode Bed Article Explanation
Petroleum and Natural Gas Industry Standard of the People's Republic of China Technical Specification for Forced Current Deep Anode Bed
Technical Specification specification of impressedcurrent deep groundbeds
SY/r 0096—2000
Compiled by: Dagang Oilfield Group Survey and Design Institute Approved by: State Petroleum and Chemical Industry Bureau Petroleum Industry Press
2001 Beijing
State Petroleum and Chemical Industry Bureau Document
Guo Shihua Zhengfa (2000) No. 457
Notice on the Approval of 39 Oil and Gas Industry Standards including "Specification for Design of General Layout of Oil and Gas Projects" China National Petroleum Corporation, China Petrochemical Corporation, China National Offshore Oil Corporation, Oil Industry Standardization Technical Committee: The draft of "Specification for Design of General Layout of Oil and Gas Projects" and other oil and gas industry standards submitted by the Oil Industry Standardization Technical Committee for approval has been approved by our bureau and is now published: The name and number of the standard are: Recommended standard:
Standard number
1. SY7r 0048--2000
2.SY7r 0062 --2000
3.SY1 (0064---200
4.571 0065--- 2000
3.S11 0095-- 2000
6. 5Y7 4196---2000
Standard Name
Oil, gas and natural gas pipeline, general design specification (replaces SYI 48---91)
Pipeline anticorrosion needle penetration test method (needle
rod method) (replaces SY/F0062-92)
Pipeline anticorrosion layer water permeability test method
(replaces SY/T 0064---92)
Test method for wear resistance of crab channel anticorrosion layer
(Drum method) (Replacement of SY door 006592) Test evaluation method for buried magnesium anode sample
Verification method
Technical specification for forced current deep anode bed pool
7.SY/T 0097--2000
8.SYT 5037 --2000
9.SY7T 5040--2000
10.SY/T 5212--2000
11.SY/T 5217--2000
12.SY/T 5262--2000
13.SY/T 5270--2000
14.SY T 5386--2000
15.SY 5387--2000
16.SY/T 5440--2000
17.SY/1 5503--2000
18.SY/T S516--2000
19.SY/T 5$23--2000
20.SYT 5542----2000
Design specification for water treatment of steam generator for produced water in heavy oil field
Low pressure fluid transmission pipeline spiral seam arc welded steel pipe (replace SY/T5037--92)
Pile spiral welded steel pipe (replace SYI
5040--92)
Quality classification of beam pumping unit (replace SY/I 5212---1997
Diamond drill bit and diamond core drill bit
(replace SY/T 5217-92)
Specification for fire-simple heating lamp (replace SY
5262-91 5Y7I 5263---91
Fuer water injection pipeline accessories design technical specification ShengC replace SY/r 5270--91)
Detailed calculation of proved petroleum reserves
fracture
oil and gas reservoir part (replace SY/5386
technical requirements for conventional crude oil production
(replace SY/T 5387---91)
technical specifications for natural gas well testing (replace SY/T 5440---92)
method for determination of chloride content in rock (replace SY/T 5503-92)
chemical analysis method for carbonate rocks (replace SY5516---92)
method for analysis of steam field water (replace SY/T 5523--92)
method for analysis of formation original physical properties (replace SY1 5542--93) .-62)
21.SY/T 55622000
22.SY/T 5928—2000
23.SY/1 5930--2000
24.SY/T 59312000
25.$Y/r 5935-2000
2 6.SY/T 5936---2000
27.SY/T 59392000
28.SY7r 5965-2000
29.SY/T 5981-2000
30.SY/T 60532000
31 .$Y/T 60952000
32.SY/I 60982000
Perforating guns for oil and gas wells (replacing SYT
5562-92)
Regulations on archiving and storage of petroleum seismic exploration data (replacing SY/T5928-94)
Operation and maintenance of magnetotelluric sounders (replacing SY/T 5930--94)
Operation and maintenance of measuring instruments (replacing SY/T 5931-94 SY/T 5932-
94, SY/T 6248-1996)
I/OSYSIEM series seismic data acquisition
system inspection items and technical indicators (replacing SY/T 5935--94)
Use and maintenance of digital seismic detectors for land use (replaces SY/T5936-94)
Use and maintenance of gravimeters (replaces SY/1
5939--94)
Geological design specifications for oil and gas exploration wells (replaces SY/T 5965--94)
Technical regulations for conventional oil testing and production (replaces SY/F 5981-94-SY/T 6016--
YKZ480 telemetered mathematical seismograph inspection items
and technical indicators (replacing SYI
6053--1994)
Technical requirements for the preparation of development plans for lenticular sandstone gas fields (replacing SY/I6095--94)
Calculation method for recoverable reserves of natural gas (replacing SY/r 6098--.94SY/1 6220-
33.SY/r 6424--2000
34.SY /T 64252000
35.SY/1 6508-2000
36. SY/r 6509--200
37.SYr 6510--2000
38.SY/T 65112000
39.$Y/T 6512-2000
Performance test method of composite flooding system
Technical requirements for preparation of adjustment plan for thermal recovery of heavy oil reservoirs Steam spring part
Nondestructive testing method of oil well pipe Non-ferromagnetic
Thread penetration testing
Kelly drill pipe
Technical requirements for design of steam injection development plan for heavy oil field
Economic evaluation method for oil field development plan
Technical requirements for preparation of feasibility plan for tertiary oil recovery Chemical flooding part
The above standards shall be implemented from June 1, 2001. State Administration of Petroleum and Chemical Industry
December 25, 2000
This specification is prepared by Dagang Oilfield Group Survey and Design Institute in accordance with the arrangement of Document No. 34 of Quality and Safety of China National Petroleum Corporation in 1999 and the principle of equivalently adopting the American Association of Corrosion Engineers Standard NACFRP0572-95 "Design, Installation, Operation and Maintenance of Forced Current Deep Anode Beds". During the preparation of this specification, the compilers conducted a relatively extensive investigation and research. On the basis of adopting NACFRP0572-95, combined with national conditions, the design, installation, operation and maintenance of forced current deep anode beds were made into detailed provisions, and detailed requirements were put forward for the types, classification, specifications and performance of materials. The difference from NACFRP0572-95 is that the conductor material specifications have been modified according to the actual application in my country, and Appendix A "Test Methods for Fluoropolymer Insulated Pole Wires" has been cancelled. The main contents of this specification include: general principles, terms, selection principles, design technical requirements, installation, operation and maintenance, etc. This specification is proposed by China Xinrun Natural Group Co., Ltd.: This specification is under the jurisdiction of the Oil and Gas Pipeline Construction Design Professional Standardization Committee. The main editor of this specification is Dagang Oilfield Survey and Design Institute. The main editor of this specification is Xing Fengjia Di Huan Yuan Zhenkun Meng Fanbin Ye Dagang Oilfield Design Institute. 1 General
1.0.1 In order to effectively implement the technology of forced current cathodic protection deep anode bed, to achieve advanced technology: economic rationality, safety and applicability, and ensure quality, this specification is specially formulated. 1.0.2 This specification is the general technical regulations for the design, installation, operation and maintenance of forced current cathodic protection deep anode bed for underground or underwater metal structures. 1.0.3 This specification only puts forward the basic technical requirements for forced current deep anode bed, and better methods and materials than those specified in this specification may also be used. 1.0-4 The design and construction of forced current cathodic protection deep anode bed, in addition to complying with this specification, shall also comply with the provisions of the relevant current national mandatory standards. 2 Terminology 2.0.1 Active area The part of the anode system that discharges current. 2.0.2 Anode cap An insulating material that covers the connection between the anode and the wire. 2.0.3 Connection seal An insulating material that covers the connection end and part of the side of the anode and the wire to maintain the electrical connection between the anode and the wire intact. 2.0.4 Backfill A material that fills the holes around the underground parts of the cathodic protection system such as the anode blanket and the exhaust pipe. 2.0.5 Blown air or water is injected into the anode through the pipe to clear the annular space and minimize the high resistance caused by the upper air block. 2.0.6 Open hole: An installation method in which the anode is surrounded by only water and electrolyte. 2.0.7 Closed hole: An installation method in which the anode is filled with filler. 2.0.8 Continuous anode: A single resistive electrode with continuous conductivity. 2.0.9 Deep ground: One or more anodes are installed vertically in a wellbore 1sm or deeper underground to provide cathodic protection. 2.0.10 Shallow ground: One or more anodes are installed less than 15m underground with water in a bottle to provide cathodic protection for metal structures underground or in water. 2.0.11 End effect: A scientific phenomenon in which the anode material is consumed too quickly at the end due to excessive current density at the end.
2.0.12 External structure Metal structure outside the cathodic protection system: 2.0.13 Gas blockage
The anode is surrounded by a large amount of oxygen, chlorine or other gases, which reduces the contact between the anode and the electrolyte or filler, increases the grounding resistance of the anode, and reduces the discharge current of the anode.
2.0.14 Packaged anxle
The anode is gradually filled with conductive filler. 2.0.15 Resistance distribution test: Profile test In the hole of deep anode bed, the curve test of the logarithm of resistance against the depth of the hole
2.0.16 Test hole
Drilled to determine the geological, hydrological and water quality characteristics of the buried place of the bed and 2.0.17 Venting
The emission of gas from deep anode bed
2.0.18 Wet insulation test test
Immerse the anode wire in the liquid electrolyte and test the electrical insulation performance of the anode wire under rated current
3 Selection principles
3.0, 1 Before deciding to use a deep anode bed, make an economic comparison of the anode installation methods used:
3.0.2 The deep anode bed should be buried in areas with dense metal structures, terrain that cannot accommodate shallow anodes, areas that may cause interference to adjacent metal structures and areas with high surface soil polarization rate:
Issues to be considered when selecting a deep anode bed: It is difficult to accurately simulate the current required for a deep anode bed: Under the same current output, the installation cost of a deep anode bed is higher than that of a shallow anode bed;
It is difficult to inspect, replace and repair closed-hole deep anode components: Since the deep hole anode bed is sensitive to air resistance, it requires special design and may require additional shallow anode length.
High-density materials are used for deep anode beds
Aqueous electrolyte is required for deep borehole beds
When casing is required for deep borehole beds, non-metallic casing can be used. 8
9When there is a problem of interlayer in underground aquifers, special design is required to prevent the mixing of water
3.0.4 The design life of the deep anode bed must match the life of the protected body. 3.0.5When using deep anode bed cathode protection, attention should be paid to possible interference to external structures and appropriate protective measures should be taken.$Y/T 6512-2000
Performance test method of composite oil recovery system
Technical requirements for preparation of thermal recovery heavy oil reservoir development adjustment plan Steam spring part
Non-destructive testing method of oil well pipe Non-ferromagnetic
Thread penetration testing
Kelly drill pipe
Technical requirements for design of steam injection development plan for heavy oil field
Economic evaluation method of oil field development plan
Technical requirements for preparation of tertiary oil recovery feasibility plan Chemical drive part
The above standards shall be implemented from June 1, 2001. State Administration of Petroleum and Chemical Industry
December 25, 2000
This specification is prepared by Dagang Oilfield Group Survey and Design Institute in accordance with the arrangement of Document No. 34 of Quality and Safety of China National Petroleum Corporation in 1999 and the principle of equivalently adopting the American Association of Corrosion Engineers Standard NACFRP0572-95 "Design, Installation, Operation and Maintenance of Forced Current Deep Anode Beds". During the preparation of this specification, the compilers conducted a relatively extensive investigation and research. On the basis of adopting NACFRP0572-95, combined with national conditions, the design, installation, operation and maintenance of forced current deep anode beds were made into detailed provisions, and detailed requirements were put forward for the types, classification, specifications and performance of materials. The difference from NACFRP0572-95 is that the conductor material specifications have been modified according to the actual application in my country, and Appendix A "Test Methods for Fluoropolymer Insulated Pole Wires" has been cancelled. The main contents of this specification include: general principles, terms, selection principles, design technical requirements, installation, operation and maintenance, etc. This specification is proposed by China Xinrun Natural Group Co., Ltd.: This specification is under the jurisdiction of the Oil and Gas Pipeline Construction Design Professional Standardization Committee. The main editor of this specification is Dagang Oilfield Survey and Design Institute. The main editor of this specification is Xing Fengjia Di Huan Yuan Zhenkun Meng Fanbin Ye Dagang Oilfield Design Institute. 1 General
1.0.1 In order to effectively implement the technology of forced current cathodic protection deep anode bed, to achieve advanced technology: economic rationality, safety and applicability, and ensure quality, this specification is specially formulated. 1.0.2 This specification is the general technical regulations for the design, installation, operation and maintenance of forced current cathodic protection deep anode bed for underground or underwater metal structures. 1.0.3 This specification only puts forward the basic technical requirements for forced current deep anode bed, and better methods and materials than those specified in this specification may also be used. 1.0-4 The design and construction of forced current cathodic protection deep anode bed, in addition to complying with this specification, shall also comply with the provisions of the relevant current national mandatory standards. 2 Terminology 2.0.1 Active area The part of the anode system that discharges current. 2.0.2 Anode cap An insulating material that covers the connection between the anode and the wire. 2.0.3 Connection seal An insulating material that covers the connection end and part of the side of the anode and the wire to maintain the electrical connection between the anode and the wire intact. 2.0.4 Backfill A material that fills the holes around the underground parts of the cathodic protection system such as the anode blanket and the exhaust pipe. 2.0.5 Blown air or water is injected into the anode through the pipe to clear the annular space and minimize the high resistance caused by the upper air block. 2.0.6 Open hole: An installation method in which the anode is surrounded by only water and electrolyte. 2.0.7 Closed hole: An installation method in which the anode is filled with filler. 2.0.8 Continuous anode: A single resistive electrode with continuous conductivity. 2.0.9 Deep ground: One or more anodes are installed vertically in a wellbore 1sm or deeper underground to provide cathodic protection. 2.0.10 Shallow ground: One or more anodes are installed less than 15m underground with water in a bottle to provide cathodic protection for metal structures underground or in water. 2.0.11 End effect: A scientific phenomenon in which the anode material is consumed too quickly at the end due to excessive current density at the end.
2.0.12 External structure Metal structure outside the cathodic protection system: 2.0.13 Gas blockage
The anode is surrounded by a large amount of oxygen, chlorine or other gases, which reduces the contact between the anode and the electrolyte or filler, increases the grounding resistance of the anode, and reduces the discharge current of the anode.
2.0.14 Packaged anxle
The anode is gradually filled with conductive filler. 2.0.15 Resistance distribution test: Profile test In the hole of deep anode bed, the curve test of the logarithm of resistance against the depth of the hole
2.0.16 Test hole
Drilled to determine the geological, hydrological and water quality characteristics of the buried place of the bed and 2.0.17 Venting
The emission of gas from deep anode bed
2.0.18 Wet insulation test test
Immerse the anode wire in the liquid electrolyte and test the electrical insulation performance of the anode wire under rated current
3 Selection principles
3.0, 1 Before deciding to use a deep anode bed, make an economic comparison of the anode installation methods used:
3.0.2 The deep anode bed should be buried in areas with dense metal structures, terrain that cannot accommodate shallow anodes, areas that may cause interference to adjacent metal structures and areas with high surface soil polarization rate:
Issues to be considered when selecting a deep anode bed: It is difficult to accurately simulate the current required for a deep anode bed: Under the same current output, the installation cost of a deep anode bed is higher than that of a shallow anode bed;
It is difficult to inspect, replace and repair closed-hole deep anode components: Since the deep hole anode bed is sensitive to air resistance, it requires special design and may require additional shallow anode length.
High-density materials are used for deep anode beds
Aqueous electrolyte is required for deep borehole beds
When casing is required for deep borehole beds, non-metallic casing can be used. 8
9When there is a problem of interlayer in underground aquifers, special design is required to prevent the mixing of water
3.0.4 The design life of the deep anode bed must match the life of the protected body. 3.0.5When using deep anode bed cathode protection, attention should be paid to possible interference to external structures and appropriate protective measures should be taken.$Y/T 6512-2000
Performance test method of composite oil recovery system
Technical requirements for preparation of thermal recovery heavy oil reservoir development adjustment plan Steam spring part
Non-destructive testing method of oil well pipe Non-ferromagnetic
Thread penetration testing
Kelly drill pipe
Technical requirements for design of steam injection development plan for heavy oil field
Economic evaluation method of oil field development plan
Technical requirements for preparation of tertiary oil recovery feasibility plan Chemical drive part
The above standards shall be implemented from June 1, 2001. State Administration of Petroleum and Chemical Industry
December 25, 2000
This specification is prepared by Dagang Oilfield Group Survey and Design Institute in accordance with the arrangement of Document No. 34 of Quality and Safety of China National Petroleum Corporation in 1999 and the principle of equivalently adopting the American Association of Corrosion Engineers Standard NACFRP0572-95 "Design, Installation, Operation and Maintenance of Forced Current Deep Anode Beds". During the preparation of this specification, the compilers conducted a relatively extensive investigation and research. On the basis of adopting NACFRP0572-95, combined with national conditions, the design, installation, operation and maintenance of forced current deep anode beds were made into detailed provisions, and detailed requirements were put forward for the types, classification, specifications and performance of materials. The difference from NACFRP0572-95 is that the conductor material specifications have been modified according to the actual application in my country, and Appendix A "Test Methods for Fluoropolymer Insulated Pole Wires" has been cancelled. The main contents of this specification include: general principles, terms, selection principles, design technical requirements, installation, operation and maintenance, etc. This specification is proposed by China Xinrun Natural Group Co., Ltd.: This specification is under the jurisdiction of the Oil and Gas Pipeline Construction Design Professional Standardization Committee. The main editor of this specification is Dagang Oilfield Survey and Design Institute. The main editor of this specification is Xing Fengjia Di Huan Yuan Zhenkun Meng Fanbin Ye Dagang Oilfield Design Institute. 1 General
1.0.1 In order to effectively implement the technology of forced current cathodic protection deep anode bed, to achieve advanced technology: economic rationality, safety and applicability, and ensure quality, this specification is specially formulated. 1.0.2 This specification is the general technical regulations for the design, installation, operation and maintenance of forced current cathodic protection deep anode bed for underground or underwater metal structures. 1.0.3 This specification only puts forward the basic technical requirements for forced current deep anode bed, and better methods and materials than those specified in this specification may also be used. 1.0-4 The design and construction of forced current cathodic protection deep anode bed, in addition to complying with this specification, shall also comply with the provisions of the relevant current national mandatory standards. 2 Terminology 2.0.1 Active area The part of the anode system that discharges current. 2.0.2 Anode cap An insulating material that covers the connection between the anode and the wire. 2.0.3 Connection seal An insulating material that covers the connection end and part of the side of the anode and the wire to maintain the electrical connection between the anode and the wire intact. 2.0.4 Backfill A material that fills the holes around the underground parts of the cathodic protection system such as the anode blanket and the exhaust pipe. 2.0.5 Blown air or water is injected into the anode through the pipe to clear the annular space and minimize the high resistance caused by the upper air block. 2.0.6 Open hole: An installation method in which the anode is surrounded by only water and electrolyte. 2.0.7 Closed hole: An installation method in which the anode is filled with filler. 2.0.8 Continuous anode: A single resistive electrode with continuous conductivity. 2.0.9 Deep ground: One or more anodes are installed vertically in a wellbore 1sm or deeper underground to provide cathodic protection. 2.0.10 Shallow ground: One or more anodes are installed less than 15m underground with water in a bottle to provide cathodic protection for metal structures underground or in water. 2.0.11 End effect: A scientific phenomenon in which the anode material is consumed too quickly at the end due to excessive current density at the end.
2.0.12 External structure Metal structure outside the cathodic protection system: 2.0.13 Gas blockage
The anode is surrounded by a large amount of oxygen, chlorine or other gases, which reduces the contact between the anode and the electrolyte or filler, increases the grounding resistance of the anode, and reduces the discharge current of the anode.
2.0.14 Packaged anxle
The anode is gradually filled with conductive filler. 2.0.15 Resistance distribution test: Profile test In the hole of deep anode bed, the curve test of the logarithm of resistance against the depth of the hole
2.0.16 Test hole
Drilled to determine the geological, hydrological and water quality characteristics of the buried place of the bed and 2.0.17 Venting
The emission of gas from deep anode bed
2.0.18 Wet insulation test test
Immerse the anode wire in the liquid electrolyte and test the electrical insulation performance of the anode wire under rated current
3 Selection principles
3.0, 1 Before deciding to use a deep anode bed, make an economic comparison of the anode installation methods used:
3.0.2 The deep anode bed should be buried in areas with dense metal structures, terrain that cannot accommodate shallow anodes, areas that may cause interference to adjacent metal structures and areas with high surface soil polarization rate:
Issues to be considered when selecting a deep anode bed: It is difficult to accurately simulate the current required for a deep anode bed: Under the same current output, the installation cost of a deep anode bed is higher than that of a shallow anode bed;
It is difficult to inspect, replace and repair closed-hole deep anode components: Since the deep hole anode bed is sensitive to air resistance, it requires special design and may require additional shallow anode length.
High-density materials are used for deep anode beds
Aqueous electrolyte is required for deep borehole beds
When casing is required for deep borehole beds, non-metallic casing can be used. 8
9When there is a problem of interlayer in underground aquifers, special design is required to prevent the mixing of water
3.0.4 The design life of the deep anode bed must match the life of the protected body. 3.0.5When using deep anode bed cathode protection, attention should be paid to possible interference to external structures and appropriate protective measures should be taken.9 Deep groundbed Anodes are installed in wells 1sm or deeper underground to provide cathodic protection. 2.0.10 Shallow groundbed Anodes are installed in wells 1sm or deeper underground to provide cathodic protection. 2.0.11 End effect Anode material is consumed too quickly at the end due to high current density at the end. 2.0.12 Foreign structure Metal structure outside the cathodic protection system. 2.0.13 Gas blockage Anodes are surrounded by large amounts of oxygen, chlorine or other gases, which reduces the contact between the anode and the electrolyte or filler, increases the grounding resistance, and reduces the discharge current of the anode.
2.0.14 packaged anxle
Installation center, gradually filled with conductive filler 2.0.15 resistance profile test in deep anode bed, resistance log value versus hole depth curve test
2.0.16 test hole
Drilled to determine the geological, hydrological and water quality characteristics of the buried site of the anode bed and 2.0.17 exhaust veming
Emission of gas from deep anode bed
2.0.18 wet insulation test wot test
Immerse the anode wire in the liquid electrolyte and test the electrical insulation performance of the anode wire under rated current
3 Selection principles
3.0, 1 Before deciding to use a deep anode bed, make an economic comparison of the anode installation methods used:
3.0.2 The deep anode bed should be buried in areas with dense metal structures, terrain that cannot accommodate shallow anodes, areas that may cause interference to adjacent metal structures and areas with high surface soil polarization rate:
Issues to be considered when selecting a deep anode bed: It is difficult to accurately simulate the current required for a deep anode bed: Under the same current output, the installation cost of a deep anode bed is higher than that of a shallow anode bed;
It is difficult to inspect, replace and repair closed-hole deep anode components: Since the deep hole anode bed is sensitive to air resistance, it requires special design and may require additional shallow anode length.
High-density materials are used for deep anode beds
Aqueous electrolyte is required for deep borehole beds
When casing is required for deep borehole beds, non-metallic casing can be used. 8
9When there is a problem of interlayer in underground aquifers, special design is required to prevent the mixing of water
3.0.4 The design life of the deep anode bed must match the life of the protected body. 3.0.5When using deep anode bed cathode protection, attention should be paid to possible interference to external structures and appropriate protective measures should be taken.9 Deep groundbed Anodes are installed in wells 1sm or deeper underground to provide cathodic protection. 2.0.10 Shallow groundbed Anodes are installed in wells 1sm or deeper underground to provide cathodic protection. 2.0.11 End effect Anode material is consumed too quickly at the end due to high current density at the end. 2.0.12 Foreign structure Metal structure outside the cathodic protection system. 2.0.13 Gas blockage Anodes are surrounded by large amounts of oxygen, chlorine or other gases, which reduces the contact between the anode and the electrolyte or filler, increases the grounding resistance, and reduces the discharge current of the anode.
2.0.14 packaged anxle
Installation center, gradually filled with conductive filler 2.0.15 resistance profile test in deep anode bed, resistance log value versus hole depth curve test
2.0.16 test hole
Drilled to determine the geological, hydrological and water quality characteristics of the buried site of the anode bed and 2.0.17 exhaust veming
Emission of gas from deep anode bed
2.0.18 wet insulation test wot test
Immerse the anode wire in the liquid electrolyte and test the electrical insulation performance of the anode wire under rated current
3 Selection principles
3.0, 1 Before deciding to use a deep anode bed, make an economic comparison of the anode installation methods used:
3.0.2 The deep anode bed should be buried in areas with dense metal structures, terrain that cannot accommodate shallow anodes, areas that may cause interference to adjacent metal structures and areas with high surface soil polarization rate:
Issues to be considered when selecting a deep anode bed: It is difficult to accurately simulate the current required for a deep anode bed: Under the same current output, the installation cost of a deep anode bed is higher than that of a shallow anode bed;
It is difficult to inspect, replace and repair closed-hole deep anode components: Since the deep hole anode bed is sensitive to air resistance, it requires special design and may require additional shallow anode length.
High-density materials are used for deep anode beds
Aqueous electrolyte is required for deep borehole beds
When casing is required for deep borehole beds, non-metallic casing can be used. 8
9When there is a problem of interlayer in underground aquifers, special design is required to prevent the mixing of water
3.0.4 The design life of the deep anode bed must match the life of the protected body. 3.0.5When using deep anode bed cathode protection, attention should be paid to possible interference to external structures and appropriate protective measures should be taken.
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