NACE SP0169-2024 地下或水下金属管道系统的外部腐蚀控制

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NACE SP0169-2024

Revised May 8, 2024

Control of External Corrosion

on Underground or Submerged

Metallic Piping Systems

reproduced, stored in a retrieval system, or transmitted, in any form or by any means (electronic, mechanical, photocopying, recording,

or otherwise) without the prior written permission of AMPP.

NACE SP0169-2024

Control of External Corrosion

on Underground or Submerged

Metallic Piping Systems

This AMPP standard represents a consensus of those individual members who have reviewed this document, its scope,

and provisions. Its acceptance does not in any respect preclude anyone, whether he or she has adopted the standard

or not, from manufacturing, marketing, purchasing, or using products, processes, or procedures not in conformance with

this standard. Nothing contained in this AMPP standard is to be construed as granting any right, by implication or other-

wise, to manufacture, sell, or use in connection with any method, apparatus, or product covered by Letters Patent, or as

indemnifying or protecting anyone against liability for infringement of Letters Patent. This standard represents minimum

requirements and should in no way be interpreted as a restriction on the use of better procedures or materials. Neither is

this standard intended to apply in all cases relating to the subject. Unpredictable circumstances may negate the useful-

ness of this standard in specic instances. AMPP assumes no responsibility for the interpretation or use of this standard

by other parties and accepts responsibility for only those ofcial AMPP interpretations issued by AMPP in accordance

with its governing procedures and policies which preclude the issuance of interpretations by individual volunteers.

Users of this AMPP standard are responsible for reviewing appropriate health, safety, environmental, and regulatory

documents and for determining their applicability in relation to this standard prior to its use. This AMPP standard may

not necessarily address all potential health and safety problems, or environmental hazards associated with the use of

materials, equipment, and/or operations detailed or referred to within this standard. Users of this AMPP standard are also

responsible for establishing appropriate health, safety, and environmental protection practices, in consultation with appro-

priate regulatory authorities, if necessary, to achieve compliance with any existing applicable regulatory requirements prior

to the use of this standard.

CAUTIONARY NOTICE: AMPP standards are subject to periodic review and may be revised or withdrawn at any time

in accordance with AMPP technical committee procedures. AMPP requires that action be taken to reafrm, revise, or

withdraw this standard no later than ve years from the date of initial publication and subsequently from the date of each

reafrmation or revision. The user is cautioned to obtain the latest edition. Purchasers of AMPP standards may receive

current information on all standards and other AMPP/NACE/SSPC publications by contacting AMPP Customer Support,

15835 Park Ten Place, Houston, Texas 77084-5145 (Tel: +1-281-228-6200, email: customersupport@ampp.org.

Document History:

2024-05-08: Revised by AMPP Standards Committee (SC) 15, Pipelines and Tanks

2013-10-04: Revised as SP0169 by NACE Task Group (TG) 360, “Piping Systems: Review of SP0169-2007 (formerly

RP0169), ‘Control of External Corrosion on Underground or Submerged Metallic Piping”

2007-03-15: Reafrmed by NACE Specic Technology Group (STG) 35, “Pipelines, Tanks, and Well Casings”

2002-04-11: Reafrmed by NACE STG 35, “Pipelines, Tanks, and Well Casings”

1996-09-13: Reafrmed by NACE Unit Committee T-10A, “Cathodic Protection”

April 1992: Revised by NACE TG T-10-1

January 1983: Revised by NACE TG T-10-1

September 1976: Revised by NACE TG T-10-1

January 1972: Revised by NACE TG T-10-1

April 1969: Approved as RP0169 by NACE TG T-10-1

AMPP values your input. To provide feedback on this standard, please contact: standards@ampp.org

NACE SP0169-2024

Control of External Corrosion

on Underground or Submerged

Metallic Piping Systems

Format, Scope, Rationale ................................................................................................................................................5

Section 1 General .....................................................................................................................................................6

Section 2 Denitions, Abbreviations, and Acronyms .................................................................................................6

Section 3 Determination of Need for External Corrosion Control............................................................................12

Section 4 Piping System Design .............................................................................................................................15

4.1 Introduction ...............................................................................................................................15

4.2 External Corrosion Control ........................................................................................................ 15

4.3 Electrical Isolation .....................................................................................................................15

4.4 Electrical Continuity ...................................................................................................................16

4.5 Corrosion Control Test Stations ................................................................................................17

Section 5 External Coatings ....................................................................................................................................19

Section 6 Criteria and Other Considerations for Cathodic Protection .....................................................................23

6.1 Introduction ...............................................................................................................................23

6.2 Criteria .......................................................................................................................................23

6.3 Relevant Considerations ...........................................................................................................29

6.4 Target Potentials .......................................................................................................................31

6.5 Alternative Reference Electrodes..............................................................................................31

Section 7 Design of Cathodic Protection Systems .................................................................................................. 31

7.1 Introduction ...............................................................................................................................31

7.2 Major Objectives of CP Systems ...............................................................................................31

7.3 CP Design Considerations ........................................................................................................32

7.4 Information Useful for CP Design ..............................................................................................32

7.5 Types of CP Systems ................................................................................................................33

7.6 Considerations Inuencing Selection of the Type of CP System ..............................................34

7.7 Factors Inuencing Design of CP Systems. ..............................................................................34

7.8 Estimating Percentage Bare .....................................................................................................36

7.9 Design Drawings and Specications ......................................................................................... 36

Section 8 Installation of Cathodic Protection Systems ............................................................................................ 37

8.1 Introduction ...............................................................................................................................37

8.2 Construction Specications ....................................................................................................... 37

8.3 Construction Supervision ..........................................................................................................37

8.4 Galvanic Anode Systems ..........................................................................................................37

8.5 Impressed Current Systems ......................................................................................................38

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摘要：

本文详细介绍了最新版NACE SP0169-2024标准（原NACE Standard RP0169）《地下或水下金属管道系统的外部腐蚀控制》的核心内容与技术要求。该标准由AMPP（国际材料性能与防护协会）发布，是全球油气、化工及市政管道行业公认的腐蚀防控权威指南。文档全面覆盖了埋地或浸水钢质管道的涂层选择、阴极保护系统设计、安装、调试及持续维护的工程实践，重点解析了2024版相比旧版在涂层性能测试、干扰电流管理及数据记录方面的关键更新。通过遵循该标准，可有效延长管道使用寿命，降低因腐蚀泄漏导致

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