1、Recommended Practice for Field Inspection of New Line PipeAPI RECOMMENDED PRACTICE 5L8SECOND EDITION,DECEMBER 1996REAFFIRMED,MAY 2015energliill AMERICAN PETROLEUM INSTITUTE Recommended Practice for Field Inspection of New Line PipeUpstream SegmentAPI RECOMMENDED PRACTICE 5L8SECOND EDITION,DECEMBER 1
2、996REAFFIRMED,MAY 2015energitill AMERICAN PETROLEUM INSTITUTE FOREWORD This recommended practice is under the jurisdiction of the API Subcommittee on Standardization of Tubular Goods.Included in this practice are the recommended procedures for field inspection and testing of new plain-end line pipe.
3、This recommended practice has been prepared specifically to address the practices and technology used in field inspection of line pipe,and certain parts are not suitable or appropriate for mill inspections.The recommended practices established within this document are intended as an inspection and/o
4、r testing guide,and nothing in this guide shall be interpreted to prohibit the agency or owner from using personal judgment,supplementing the inspection with other techniques,extending existing techniques,or reinspecting certain lengths.This recommended practice covers the qualification of inspectio
5、n personnel,a description of inspection methods,apparatus calibration,and standardization procedures for various inspection methods.The evaluation of imperfections and marking of inspected new line pipe are included.This document shall be used as a guide applicable to the methods for field inspectio
6、n and shall not be used as a basis for acceptance or rejection.Acceptance or rejection of new API monogrammed line pipe shall be based on conformance with API Specification SL.This practice shall become effective on the date printed on the cover but may be used voluntarily from the date of distribut
7、ion.API publications may be used by anyone desiring to do so.Every effort has been made by the Institute to assure the accuracy and reliability of the data contained in them;however,the Institute makes no representation,warranty,or guarantee in connection with this publication and hereby expressly d
8、isclaims any liability or responsibility for loss or damage resulting from its use or for the violation of any federal,state,or municipal regulation with which this publication may conflict.Suggested revisions are invited and should be submitted to the director of the Exploration and Production Depa
9、rtment,American Petroleum Institute,1220 L Street,N.W.,Washington,D.C.20005.iii CONTENTS Page SCOPE AND APPLICATION.I I.I Basis for Inspection.1.2 Applicability of Inspections.l 1.3 Repeatability of Results.I 1.4 Consequences of Variability.2 2 REFERENCES.2 3 DEFINITION OF TERMS.2 4 QUALITY ASSURANC
10、E.9 5 QUALIFICATION OF INSPECTION PERSONNEL.9 5.1 Scope.9 5.2 Written Procedure.9 5.3 Qualification of Inspection Personnel.9 5.4 Training Programs.9 5.5 Examinations.I 0 5.6 Experience.10 5.7 Requalification.10 5.8 Documentation.10 5.9 NDT Personnel Certification.10 6 GENERAL INSPECTION PROCEDURES.
11、10 6.1 Scope.I 0 6.2 Pre-inspection Procedures.10 6.3 Records and Notification.11 6.4 Post-inspection Procedures.11 7 ACCEPTANCE CRITERIA,DISPOSITION,AND RESPONSIBILITY.11 7.1 Scope.11 7.2 Basis for Acceptance.11 7.3 Responsibility for Rejections.11 8 VISUAL AND DIMENSIONAL INSPECTION.12 8.1 Scope.1
12、2 8.2 Application.12 8.3 Equipment(including calibration).12 8.4 External Surface Illumination.12 8.5 Internal Surface Illumination.12 8.6 Full-Length Visual Inspection of Line Pipe(FLVI).13 8.7 Diameter and Bevel Check on Pipe Ends.13 9 HARDNESS TESTING.14 9.1 Scope.14 9.2 Application.14 9.3 Equipm
13、ent.14 9.4 Calibration and Standardization.14 9.5 Procedures.15 V Page IO MAGNETIC PARTICLE INSPECTION(MPI).15 10.1 Scope.15 10.2 Application.15 10.3 Equipment,Materials,and General Procedures.15 10.4 Calibration and Standardization.17 10.5 Procedures for Inspection of Longitudinal Welds,Inside and
14、Outside Surface(FLMPIW,FLMPOW).18 10.6 Full Body Inspection,Inside and Outside Surface.18 10.7 End Area Inspection(EAI).19 11 ELECTROMAGNETIC INSPECTION.19 11.1 Scope.19 11.2 Application.19 11.3 Equipment.19 11.4 Calibration and Standardization.19 11.5 Inspection Procedures.21 12 RESIDUAL MAGNETISM
15、AND DEMAGNETIZATION.22 12.1 Scope.22 12.2 Application.22 12.3 Demagnetization Services.22 13 GAMMA RAY WALL THICKNESS MEASUREMENT.22 13.1 Scope.22 13.2 Application.23 13.3 Equipment.23 13.4 Calibration and Standardization.23 13.5 Inspection Procedure.23 14 ELECTROMAGNETIC GRADE COMPARISON.23 14.1 Sc
16、ope.23 14.2 Application.23 14.3 Equipment.23 14.4 Calibration and Standardization.23 14.5 Inspection Procedure.24 15 ULTRASONIC INSPECTION.24 15.1 Scope.24 15.2 Application.24 15.3 General Procedures for Calibration,Standardization,and Inspection.24 15.4 Ultrasonic Inspection of Pipe Welds(UTW).25 15.5 Inspection of the Pipe Body for Wall Thinning and Planar Imperfections(UTBL).26 15.6 Inspection of the Pipe Body for Longitudinal,Transverse,and Oblique Imperfections(UTBLTO).27 15.7 Inspection of
