1、Recommended Practice for Unprimed Internal Fusion Bonded Epoxy Coating of Line PipeAPI RECOMMENDED PRACTICE 5L7SECOND EDITION,JUNE 1988REAFFIRMED,MAY 2015 Recommended Practice for Unprimed Internal Fusion Bonded Epoxy Coating of Line PipeUpstream SegmentAPI RECOMMENDED PRACTICE 5L7FOURTH EDITION,JUN
2、E 1988REAFFIRMED,MAY 2015 RP 5L7:Unprimed Internal Fusion Bonded Epoxy Coating of Line Pipe 3 POLICY I(a)API PUBLICATIONS NECESSARILY ADDRESS PROBLEMS OF A GENERAL NATURE.WITH RESPECT TO PARTICULAR CIRCUMSTANCES,ULATIONS SHOULD BE REVIEWED.(b)API IS NOT UNDERTAKING TO MEET DUTIES PLIERS TO WARN AND
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4、 BE CONSTRUED AS GRANTING ANY RIGHT,BY IMPLICATION OR OTHERWISE,FOR THE MANUFACTURE,SALE,OR USE OF ANY METHOD,APPARATUS,OR PRODUCT COVERED BY LETTERS PATENT.NEITHER SHOULD ANYTHING CONTAINED IN THE PUB-LICATION BE CONSTRUED AS INSURING MENT OF LETTERS PATENT.(d)GENERALLY,API STANDARDS ARE REVIEWED A
5、ND REVISED,REAFFIRMED,OR WITHDRAWN AT LEAST EVERY FIVE YEARS.TWO YEARS WILL BE ADDED TO THIS REVIEW CYCLE.THIS PUBLICATION WILL NO LONGER BE IN EFFECT FIVE YEARS AFTER ITS PUBLI-ARD OR,WHERE AN EXTENSION HAS BEEN GRANTED,UPON REPUBLICATION.STATUS OF THE PUBLICATION CAN BE ASCERTAINED FROM ANYONE AGA
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7、 L 9 4 1 5 I RP 5L7-BB -4 American Petroleum Institute FOREWORD(a)This Recommended Practice was prepared by a Formulating Committee which included representatives of pipeline operators and line pipe manufacturers and advisors from coating manufacturers and coating appli-cators as well as other inter
8、ested individuals.(b)The purpose of this Recommended Practice is to present methods for qualifying coating materiais,pro-duction application of such materiais,and final accept-ance tests of coated pipe for internally corrosive conditions,a(c)While the coating system described in this docu-ment is in
9、tended to provide a high degree of corrosion protection,the user is cautioned that operating condi-tions as well as the chemical nature of the product to be transported can affect the performance of the coating,and additional anti-corrosion methods,such as inhibi-tors,may also be warranted.(d)Americ
10、an Petroleum Institute(API)Recommended I Practices are published to facilitate the broad availabil-I ity of proven,sound engineering and operating prac-tices.These Recommended Practices are not intended to obviate the need for applying sound judgment as to when and where these Recommended Practices
11、should be utilized.(e)The formulation and publication of API Recom-mended Practices is not intended to,in any way,inhibit anyone from using any other practices,(f)Any Recommended Practice may be used by anyone desiring to do so,and diligent effort has been made by API to assure the accuracy and reli
12、ability of the data contained therein.However,the Institute makes no representation,warranty,or guarantee in connection with the publication of any Recommended Practice and hereby expressly disclaims any liability or responsibil-ity for loss or damage resulting from their use,for any violation of an
13、y federal,state,or municipal regulation with which an API recommendation may conflict,or for the infringement of any patent resulting from the use of this publication.Attention Users:Portions of this publication have been changed from the previous edition.The locations of changes have been marked wi
14、th a bar in the margin,as shown to the left of this paragraph.In some cases the changes are significant,while in other cases the changes reflect minor editorial adjustments.The bar notations in the margins are provided as an aid to users as to those parts of this publication that have been changed f
15、rom the previous edition,but API makes no warranty as to the accuracy of such bar notations.RP 5L7:Unprimed Internal Fusion Bonded Epoxy Coating of Line Pipe 5 SECTION 1 SCOPE 1.0 SCOPE This Recommended Practice provides for UN-PRIMED INTERNAL FUSION BONDED EPOXY COATING O F LINE PIPE for use in tra
16、nsportation pipelines in the petroleum industry.The recommendation provided herein covers:a.Section i Scope Section 2 Coating Material Specification Section 3 Laboratory Coating Testing Section 4 Application Practices Section 5 Production Inspection and Acceptance Procedures Within this Recommended Practice:1)“Shall”is used to indicate that a provision is mandatory.2)“Should”is used to indicate that a provision is not mandatory,but recommended as good prac-tice.3)“May”is used to indicate that a