1、Corrosion Control DocumentsAPI RECOMMENDED PRACTICE 970FIRST EDITION, DECEMBER 2017Special NotesAPI publications necessarily address problems of a general nature. With respect to particular circumstances one must comply with, local, state, and federal laws and regulations should be reviewed.API cann
2、ot fulfill the duties of employers, manufacturers, or suppliers to warn and properly train and equip their employees and others who may be exposed, to health and safety risks and cannot prescribe precautions, nor does API undertake their obligations under local, state, or federal laws.Information co
3、ncerning safety and health risks and proper precautions with respect to particular materials and conditions shall be obtained from the employer, the manufacturer, the supplier of that material, or the material safety data sheet.Nothing contained in any API publication can be construed as granting an
4、y right, by implication or otherwise, for the manufacture, sale, or use of any method, apparatus, or product covered by letters patent. Do not construe anything contained in the publication as insuring anyone against liability for infringement of letters patent.Generally, API standards are reviewed
5、and revised, reaffirmed, or withdrawn at least every five years. Sometimes a one-time extension of up to two years will be added to this review cycle. This publication will no longer be in effect five years after its publication date as an operative API standard or, where an extension has been grant
6、ed, upon republication. Status of the publication can be ascertained from the API Standards Department telephone (202) 682-8000. A catalog of API publications and materials is published annually and updated quarterly by API, 1220 L Street, N.W., Washington, D.C. 20005, www.api.org.This document was
7、produced under API standardization procedures that ensure appropriate notification and participation in the developmental process and is designated as an API standard. Questions concerning the interpretation of the content of this standard or comments and questions concerning the procedures under wh
8、ich this standard was developed should be directed in writing to the Director, Standards Department, American Petroleum Institute, 1220 L Street, N.W., Washington, D.C. 20005, standardsapi.org. Requests for permission to reproduce or translate all or any part of the material published herein should
9、also be addressed to the general manager.API standards are published to facilitate the broad availability of proven, sound engineering and operating practices. These standards do not obviate the need for applying sound engineering judgment regarding when and where these standards should be utilized.
10、 The formulation and publication of API standards is not intended in any way to inhibit anyone from using any other practices.Any manufacturer marking equipment or materials in conformance with the marking requirements of an API standard is solely responsible for complying with all the applicable re
11、quirements of that standard. API does not represent, warrant, or guarantee that such products do in fact conform to the applicable API standard.All rights reserved. No part of this work may be reproduced, translated, stored in a retrieval system, or transmitted by any means, electronic, mechanical,
12、photocopying, recording, or otherwise, without prior written permission from the publisher. Contact the Publisher, API Publishing Services, 1220 L Street, NW, Washington, DC 20005.Copyright 2017 American Petroleum InstituteContentsPage1 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Normative References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 Terms, Definitions, and Acronyms . . .
14、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Introduction to Corrosion Control Documents/Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.1 Characteristics . . . . . . . . . . . . . . . . . . . . .
15、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.2 Key Components of a CCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.3 Target Audience . . . . . . . . . . . .
16、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.4 Inspection Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74.5 Process Unit Int
17、egrity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 CCD Work Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
18、.1 General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85.2 Premises and Assumptions Concerning the CCD Work Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95.3 CCD T
19、eam Members . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105.4 Roles, Responsibilities, and Accountabilities for the CCD Work Process . . . . . . . . . . . . . . . . . . . . . . 125.5 Data Needed for the Team Me
20、etings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135.6 Unit Specific Corrosion Systems/Circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 145.7 Damage Mechanisms . . . . . . . . .
21、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165.8 Desired Run Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.9 Process Variables
22、and IOWs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175.10 Integration with Existing PSM and Operational Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185.11 Updating the CCD . . . . . . . .
23、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 196 Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 207 Integrating
24、CCDs with Other Related Work Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217.1 CCDs as Part of New Construction or Revamp Project Deliverables. . . . . . . . . . . . . . . . . . . . . . . . . . . 228 Document Maintenance and Revalidation . . . . . . . . . .
25、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228.1 Updating CCDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228.2 Finalizing the Updated CCD and CMDs . . . . . . . . .
26、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Annex A (informative) Example CCD Development and Implementation Process . . . . . . . . . . . . . . . . . . . . . . 24Annex B (informative) Corrosion and Materials Damage Mechanisms Checklist . . . . . . . . . . .
27、 . . . . . . . . . . . . 27Annex C (informative) Training Course Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30Annex D (informative) Typical Systems for Selected Processes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
28、 . . . . 32Annex E (informative) Example of a Simplified Corrosion Control Document. . . . . . . . . . . . . . . . . . . . . . . . . . 39Annex F (informative) CCDs as Part of New Construction and Revamp Project Deliverables. . . . . . . . . . . . . 48Bibliography . . . . . . . . . . . . . . . . . .
29、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50Figures1 Work Process Map: CCD Development, Review, and Update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10Tables1 CCD Documentation Responsibilities . .
30、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112 Suggested Information to be Reported for Corrosion Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153 Suggested Information to be Reported for Corrosion Circuits . .
31、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16vContentsPage4 Personnel Group Training . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21A.1 Example CCD Development and Implementation Process . . . .
32、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24A.2 CCD Implementation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25B.1 Corrosion and Materials Damage Mechanisms Checklist . . . . . . . . . . .
33、 . . . . . . . . . . . . . . . . . . . . . . . . . . . 27B.2 Mechanical and Other Damage Mechanisms Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29C.1 Suggested Training Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34、. . . . . . . . . . . . . . . . . . . . . . . 31C.2 Suggested CCD Training Styles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31E.1 Corrosion System #125 Example Equipment and Materials . . . . . . . . . . . . . . . . . . . .
35、. . . . . . . . . . . . . . . . 40E.2 Corrosion System #125 Example Injection and Mix Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40E.3 Corrosion System #125 Example Inspection History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
36、. . 41E.4 Corrosion System #125 Example Active/Potential Damage Mechanisms . . . . . . . . . . . . . . . . . . . . . . . . . 41E.5 Corrosion System #125 Example Operating Envelope Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42E.6 Corrosion System #125 Example Special I
37、nspection ConsiderationsEquipment and Piping (in addition to API 570) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42E.7 Corrosion System #125 Example Critcal Check Valves . . . . . . . . . . . . . . . . . . . .
38、 . . . . . . . . . . . . . . . . . . . . 42E.8 Corrosion System #125 Example Critical Bundles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42E.9 Corrosion System #125 Example Critical Thermowells . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
39、 . . . . . . . . . 42E.10 System 3 Example Injection and Mix Points and Dead Legs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44E.11 Example 3 System Integrity Operating Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44E.
40、12 Example System 3 Equipment and Material Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45E.13 Active/Potential Equipment Degredation Mechanism Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . 47vi1Corrosion Control Documents1 Scope T
41、his recommended practice (RP) provides users with the basic elements for developing, implementing, and maintaining a Corrosion Control Document for refining, and at the owners discretion, may be applied at petrochemical and chemical process facilities. A Corrosion Control Document (CCD) is a documen
42、t or other repository or system that contains all the necessary information required to understand materials damage susceptibility issues in a specific type of operating process unit at a plant site. CCDs are a valuable addition to an effective Mechanical Integrity Program. They help to identify the
43、 damage mechanism susceptibilities of pressure-containing piping and equipment, factors that influence damage mechanism susceptibilities, and recommended actions to mitigate the risk of loss of containment or unplanned outages. This recommended practice serves as the basis for tracking CCD developme
44、nt, implementation, and maintenance to maintain consistency and to integrate the CCD work process with other plant integrity programs, such as Management of Change (MOC), Process Hazards Analysis (PHA), and Reliability Centered Maintenance (RCM). Some of these programs have significant overlap with
45、the development of CCDs, including Risk-based Inspection studies (see API RP 580 and RP 581), Integrity Operating Windows (see API RP 584), in-house unit corrosion reviews, circuitization/systemization programs, and similar types of corrosion studies. Development of CCDs can serve as a useful starti
46、ng point for establishing these programs if they have not been undertaken.This document provides the owner/user with information and guidance on the work processes for development and implementation of CCDs for the owners/users process units. While some generic examples are provided in the text and
47、in 5.9, this document does not contain a complete list of unit-specific CCDs or operating plant variables for the numerous types of hydrocarbon processing units in the industry. The rigor of review, the level of documentation, and even the need to develop a CCD will depend on the complexity of the p
48、rocess unit under consideration and the inherent risk associated with the process. It is the responsibility of the facility owner/user to determine the level of detail contained within their CCD.The scope of this standard includes: descriptions of CCDs and definitions of related terminology; creatin
49、g, establishing, and maintaining CCDs; data and information typically needed to create CCDs; descriptions of the various types of CCDs needed for process units; documenting and implementing CCDs; reviewing, changing and updating CCDs; integrating CCDs with other risk management practices; roles and responsibilities in the CCD work process; and knowledge transfer to all stakeholders.2 API RECOMMENDED PRACTICE 970Typical CCDs cover the pressure-containing components of fixed equipment. The types of equipment and associated components typically covered by CCDs are: pressure ve
