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GB/T 33637-2025: Cathodic protection - MMO/Ti flexible anode
Status: Valid
GB/T 33637: Evolution and historical versions
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| GB/T 33637-2025 | English | 559 |
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Cathodic protection - MMO/Ti flexible anode
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| GB/T 33637-2017 | English | 359 |
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Cathodic protection -- MMO/Ti flexible anode
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Standard similar to GB/T 33637-2025 GB/T 37309 | GB/T 35505 | GB/T 31554 | GB/T 19824 | GB/T 11372 | Basic data | Standard ID | GB/T 33637-2025 (GB/T33637-2025) | | Description (Translated English) | Cathodic protection - MMO/Ti flexible anode | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | A29 | | Classification of International Standard | 25.220.99 | | Date of Issue | 2025-10-31 | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 33637-2017 | GB/T 33637-2025: Cathodic protection - MMO/Ti flexible anode---This is a DRAFT version for illustration, not a final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.
ICS 25.220.99
CCSA29
National Standards of the People's Republic of China
Replaces GB/T 33637-2017
Cathodic protection MMO/Ti flexible anode
Published on 2025-10-31
Implemented on May 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Table of contents
Preface III
1.Scope 1
2 Normative References 1
3.Terms, Definitions, and Abbreviations 1
4.Product structure and model 2
5 Technical Requirements 4
6.Inspection and Acceptance 7.
7.Marking, Packaging, Storage and Transportation 8.
8.Product Use 9.
Appendix A (Normative) Bending Radius Test Method 12
Appendix B (Normative) Test Method for Coverage Density of Abrasion-Resistant Woven Mesh 13
Appendix C (Normative) Test Methods for Anode Performance 14
Appendix D (Normative) Construction Drawing Design for Site Area Protection 16
Appendix E (Informative) Construction Drawing Design for Apron Pipeline Network Protection 18
Appendix F (Informative) Construction Drawing Design for Tank Bottom Plate Protection 19
References 21
Foreword
This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents".
Drafting.
This document replaces GB/T 33637-2017 "Cathode Protection MIMO/Ti Flexible Anode". Compared with GB/T 33637-2017, except for...
Aside from structural adjustments and editorial changes, the main technical changes are as follows.
a) Added the terms "linear density," "design life," "rated output current," and "breakdown flexible anode" and their definitions (see 3.1.4, 3.1.5).
3.1.6, 3.1.8);
b) A new method for representing the type of flexible anode has been added (see 4.2.2);
c) The product's outer diameter dimensions have been changed (see 5.1.2,.2017 version of 5.1.2);
d) Increased requirements for product line density (see 5.1.3);
e) Increased performance requirements for MMO/Ti wire technology (see 5.2.1);
f) The environmental suitability factors for the type of flexible anode-embedded cable insulation sheath have been added (see 5.2.2);
g) Increased technical requirements for flexible anode nodes (see 5.2.3);
h) The requirements for fixed carbon content and particle size of coke packing have been changed (see 5.2.4, 5.2.3 in the.2017 version);
i) The technical requirements for the minimum bending radius of the product have been changed (see 5.3.1,.2017 version of 5.3.1);
j) The design life of the flexible anode under different rated output current conditions has been increased (see Table 4);
k) A formula for calculating the maximum output current during the anodic performance test has been added (see 5.3.3.1);
l) The requirement for continuous operation time at maximum output current has been changed (see 5.3.3.2, 5.3.4 in version.2017);
m) Requirements for inspecting the nominal dimensions, linear density, coating adhesion, and design life of MMO/Ti wires have been added (see Table 5).
A method for determining the measurement data has been added (see 6.1.2);
n) The requirements for product factory inspection have been changed (see 6.2.1 and 6.2.3, and 7.2.1 in the.2017 version);
o) Increased requirements for product packaging labeling (see 7.1.2);
p) Added requirements for product loading and unloading (see 7.3.1);
q) Added requirements for product installation (general requirements, pipeline cathodic protection installation, and tank bottom plate cathodic protection installation) (see 8.2);
r) Change the nature of Appendix D to “normative” (see Appendix D, Appendix B of the.2017 edition).
Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.
This document was proposed by the China Petroleum and Chemical Industry Federation.
This document is under the jurisdiction of the National Technical Committee on Corrosion Control Standardization (SAC/TC381).
This document was drafted by. Beijing Bihai Yunzhi New Material Technology Co., Ltd., and the West-East Gas Pipeline Project of China Oil & Gas Pipeline Network Corporation.
Branch offices, Shenyang Zhongke Environmental Engineering Technology Development Co., Ltd., Suzhou Thermal Power Research Institute Co., Ltd., China Petrochemical Engineering Construction Co., Ltd.
Zhejiang Yuxi Corrosion Control Co., Ltd., China Nuclear Power Operation Management Co., Ltd., Beijing Dingxin New Technology Co., Ltd., Mianyang
Hongbo Environmental Protection Co., Ltd., Chongqing Branch of China Huaneng Group Co., Ltd., Huaneng Chongqing Luohuang Power Generation Co., Ltd., Linyi Bosidao
Electrical Materials Co., Ltd., Jiaozuo Libo Light Alloy Co., Ltd., Xi'an Taijin New Energy Technology Co., Ltd., and China Corrosion International Corrosion Control Co., Ltd.
Engineering Technology Research Institute (Beijing) Co., Ltd., Shaanxi Youchuang Environmental Protection Technology Co., Ltd., Shaanxi Huiteng Real Innovation Materials Technology Co., Ltd.
Hunan Anguang Inspection and Testing Co., Ltd., Shanghai Yunshen Shipbuilding Engineering Co., Ltd., Shenzhen Zhigao Boshi Engineering Co., Ltd., China Railway Shanghai Engineering
Group Corporation Limited, Sichuan Runxi Anticorrosion Engineering Co., Ltd., China University of Petroleum (Beijing), China Corrosion Control Technology Association.
The main drafters of this document are. Ding Baofeng, Di Taishen, Guo Lei, You Jiang, Wang Shuguo, Zhao Wanxiang, Ou Shuhui, Wen Jie, Hu Yiyong, Chen Ning, and Zhou Gang.
Wu Mingchang, Liu Zihao, Wang Shuiyong, Du Zhubing, Hao Jieyong, Sun Ligang, Li Jie, Liu Lie, Zhao Xiaoqing, Li Honglie, Li Jike, Kong Quanxing, Wang Weimin
Feng Qing, Zhang Lin, Wang Guiming, Wu Hongrang, Yan Jianwei, Li Fengguang, Lu Yun, Hu Weibing, Wu Xun, Tan Yong, Heng Tingyang, Jiang Zitao, Ren Guangchen, Yang Yangyang
Zhang Yuping, Xu Liu, Ren Zhifeng, Xu Lei, Luo Hui, Zeng Duo, Xu Shangyuan.
This document was first published in.2017, and this is its first revision.
Cathodic protection MMO/Ti flexible anode
1 Scope
This document specifies the structure, model, technical requirements, and inspection procedures for cathodic protection MMO/Ti flexible anodes (hereinafter referred to as "the Product").
Acceptance and marking, packaging, storage and transportation, and use of the product.
This document applies to the design, manufacture, and use of MMO/Ti flexible anodes in cathodic protection systems for soil environments.
2 Normative references
The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are listed below.
For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.
This document.
GB/T 1804-2000 General tolerances - Tolerances for linear and angular dimensions without specified tolerances
GB/T 2001 Analytical Determination Methods for Coke Industry
GB/T 3620.1-2016 Grades and Chemical Compositions of Titanium and Titanium Alloys
GB/T 3623 Titanium and Titanium Alloy Wire
GB/T 4208-2017 Degrees of protection provided by enclosures (IP code)
GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values
GB/T 9174 General Technical Requirements for Transport Packaging of General Cargo
GB/T 12706.1 Extruded insulated power cables and accessories with rated voltages from 1kV (Um=1.2kV) to 35kV (Um=40.5kV)
Part 1.Cables with rated voltages of 1kV (Um=1.2kV) and 3kV (Um=3.6kV)
GB/T 15078 Method for measuring contact resistance of precious metal electrical contact materials
GB/T 16921 Metallic Coatings - X-ray Spectroscopy for Coating Thickness Measurement
GB/T 19976 Determination of bursting strength of textiles - Steel ball method
GB/T 19978 Determination of puncture strength of geotextiles and related products
GB/T 21196.2 Textiles - Martindale Method - Determination of Abrasion Resistance of Fabrics - Part 2.Determination of Specimen Breakage
GB/T 24521 Method for Determination of Resistivity of Carbon Raw Materials and Coke
GB/T 34016 General Rules for Rodent-Proof and Ant-Proof Wires and Cables
GB/T 41493.2 Accelerated life test method for mixed metal oxide anodes for cathodic protection - Part 2.Application in soil and
In natural water environments
GB/T 51253 Standard for Termite Damage Assessment in Construction Projects
FZ/T 54064 Polyester Monofilament
YS/T 587.12 Determination of particle size distribution of calcined petroleum coke for carbon anodes - Part 12
3.Terms, Definitions and Abbreviations
3.1 Terms and Definitions
The following terms and definitions apply to this document.
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