Sheet 1 OF 10
Subcontractor’s name : Kharafi National KSC, Kuwait
Subcontract No. : 0-6798-Z-3100-001
Project Name : Clean Fuels Project
Subcontract Work Package : General Construction Works - GC3 (GS-Brown)
DOCUMENT TITLE : Ferrite Content Measurement Procedure
Subcontractor's Doc.No. : VG3100-001-A-3014
KNPC CLEAN FUELS PROJECT
Subcontractor
ISSUE PURPOSE
□FA □FR □FI □FC □AB
Approval or review hereunder shall not be construed to relieve Vendor /
Subcontractor of his responsibilities and liability under the Contract.
CTR DEPT. /
Contractor Review Result
SIGNATURE
√ 1. Approved / No comments
2. Approved / Reviewed - Minor comments JGSK/GS Site
Manager
3. Rejected - Comments as Noted
Mr. Young-
4. Rejected Hwan, Choi
5. Not Reviewed
JOB. NO. 0-6798-2 Doc Type Code
COMPANY DOC.no P6011MAA.000.10.51.3044 REV
V plus Contractor Code (V/J/G/S) & Subcontract No. - SERIAL no.
Conctractor
DOC.no. F1
VG3100-001-A-3014
KNPC CFP Project DSN:
MAA Package 17811
REVIEW BY: DISCIPLINE: DATE:
No comments CODE:
1 S.M.Logan Const 29.09.2015
REVIEW CODE:
1-Approved\No Comments; 2-Minor Comments; 3-Comments as Noted;
4 - Rejected
Doc. No : VG3100-001-A-3014
FERRITE CONTENT
Rev. No : F1
MEASUREMENT PROCEDURE
Page No. : 2 of 8
REVISION LOG
NOTES
1
i) Revisions after 01 are denoted by a vertical line in the left hand margin against the revised text,
with the revision number displayed next to the revision line as shown by the example on the left.
ii) Revision no. 01 is issued for Contractor’s review and approval, subsequent revisions shall be
02, 03, etc... until its approval.
iii) Upon Contractor’s approval, Revision no. A1 shall be issued to Company for review.
Subsequent revisions thereafter shall be A2, A3, etc...
iv) Upon Company approval, Revision no. F1 shall be issued for Construction.
Subsequent revisions thereafter shall be F2, F3, etc…
Rev. No Rev. Date Revised Page Revision Description
01 20 May 2015 1st Issue For Approval
A1 03 Jun. 2015 For Company Review
F1 25 Jul. 2015 For Construction
Page 2 of 8
INTERNATIONAL INSPECTION CENTRE W.L.L
(INTREX) Page4 of 8
Tel: 23986748, 23988915 Fax No. 23986749 Date: 25.07.2015
FERRITE CONTENT MEASUREMENT Doc . No. VG3100-001-A-3014,Rev.F1
PROCEDURE
TABLE OF CONTENTS
SECTION TITLE PAGE
1.0 PURPOSE 5
2.0 SCOPE 5
3.0 REFERENCES 5
4.0 DEFINITIONS 5
5.0 PROCEDURE 6
5.1 PERSONNEL QUALIFICATION 6
5.2 EQUIPMENT 6
5.3 MAKING A MESUREMENT 6
5.4 INFLUENCING FACTORS 7
5.5 CORRECTION FACTORS 7
5.6 CALIBRATION 7
5.7 NORMALISATION 8
5.8 SURFACE PREPARATION 8
5.9 OPERATION AND STORAGE 8
OF INSTRUMENT
5.10 RECORDS 8
6.0 SAFETY 8
7.0 INSPECTION REPORT 8
INTERNATIONAL INSPECTION CENTRE W.L.L
(INTREX) Page5 of 8
Tel: 23986748, 23988915 Fax No. 23986749 Date: 25.07.2015
FERRITE CONTENT MEASUREMENT Doc . No. VG3100-001-A-3014,Rev.F1
PROCEDURE
1.0 PURPOSE
The purpose of this procedure is to provide the specific requirements to perform the Ferrite
Content Measurement to meet the specific contractual specifications and requirements of
the Project - Clean Fuels Project (CFP).
2.0 SCOPE
This procedure describes the minimum requirements for ferrit content measurment in weld
metal and clad layers of austenitic or Duplex stainless steel and for determination of the
ratio of Ferrite in Austenitic and Duplex stainless steels by using FERITSCOPE MP30.
This scope includes the methods of calibration, evaluation and reporting. This document
has specific reference to the Project - Clean Fuels Project (CFP).
3.0 REFERENCES
3.1 DEP 30.10.60.18 - Shell DEP for Welding of metals
(amendments/supplements to API RP 582)
3.2 30.10.60.18-P6000CFP-000-PV - Proj. Variation to SHELL DEP30.10.60.18,
Welding of Metal (Ammendments/Supplements to
API RP 582)
3.3 DEP 31.38.01.31 - Shell DEP for Shop and Fiel Fabrication of Piping
3.4 31.38.01.31-P6000CFP-000-PV - Proj. Variation to SHELL DEP31.38.01.31,
Shop and Field Fabrication of Piping
3.5 DEP 62.10.08.11 - Shell DEP for Inspection and Functional Testing of
Instruments
3.6 ASME Sec V - Non-destructive Examination
3.7 ASME Sec VIII - Pressure vessels
3.8 ASME B31.3 - Process Piping.
3.9 ASME B31.8 - Gas Transmission and Distribution piping system.
3.10 ISO 8249 - Determination of Ferrite Number(FN) in austenitic and
duplex ferritic-austenitic Cr-Ni Stainless Steel Weld Metal.
3.11 AWS A4.2M - Standard Procedures for Calibrating Magnetic Instruments
to Measure the Delta Ferrite Content of Austenitic and
Duplex Austenitic-Ferritic Stainless Steel Weld Metals
3.12 FERITSCOPE MP30 Operating Manual.
3.13 FERITSCOPE FMP30 Operating Manual.
4.0 DEFINITIONS
4.1 ASME - American Society of mechanical Engineers
4.2 ASNT - American Society for Non-destructive Testing
4.3 API - American Petroleum Institute
4.4 FN - Ferrite Number
4.5 AWS - American Welding Society
4.6 COMPANY - Kuwait National Petroleum Company
INTERNATIONAL INSPECTION CENTRE W.L.L
(INTREX) Page6 of 8
Tel: 23986748, 23988915 Fax No. 23986749 Date: 25.07.2015
FERRITE CONTENT MEASUREMENT Doc . No. VG3100-001-A-3014,Rev.F1
PROCEDURE
5.0 PROCEDURE
5.1 PERSONNEL QUALIFICATIONS
5.1.1 The instrument should be operated by Experienced personnel only.
5.2 EQUIPMENT
5.2.1 Basic Unit
The equipment used to measure ferrite content shall be FERITSCOPE
MP30, FMP30 which shall give digital read out value either in %Fe (Ferrite
Percentage) or FN ( Ferrite Number)
5.2.2 Test Method
This instrument uses the magneticinduction test method whereby the ferrite
content is obtained from the magnetic permeability.
5.2.3 Type of Measuring Mode
Standard Measuring Mode
In standard measuring mode single measurements are taken
consecutively on the same part and are then combined into a block. The
resulting block mean value then represents the local ferrite content of
the reference area.
Matrix Measuring Mode
Matrix measuring mode is ideally suited for applications, where
different measuring objects of the same type have to be measured
sequentially always on the same specific reference area, and where the
measurement data from the corresponding areas are to be combined into
blocks.
5.3 MAKING A MEASUREMENT
5.3.1 The probe has to be placed vertically on the surface of the measuring object
to perform a measurement.The measurement should be performed within
the reference area.
5.3.2 Following the measurement appears in the display, the probe can be lifted
and is ready for the next measurement.
5.3.3 Probe tips to be kept atleast 50mm(2”) away from any metal object prior to
each measurement. Do not hover the probe above the measuring object.
INTERNATIONAL INSPECTION CENTRE W.L.L
(INTREX) Page7 of 8
Tel: 23986748, 23988915 Fax No. 23986749 Date: 25.07.2015
FERRITE CONTENT MEASUREMENT Doc . No. VG3100-001-A-3014,Rev.F1
PROCEDURE
5.3.4 Measurements shall be made along the approximate centreline of a given
weld bead and shall itbe as per the requirements of ISO 8249.
5.4 INFLUENCING FACTORS
5.4.1 Curvature of the measuring object
5.4.2 Thickness of the measuring object
5.4.3 Layer thickness
5.4.4 Distance of the measuring position to the edge
5.5 CORRECTION FACTOR
The effects of influencing factors can be corrected by multiplying the measured
ferrite content with the corresponding correction factors.Generally, a correction of
these influences is required in following conditions.
5.5.1 The diameter of the curvature is smaller than 50mm with convex curvature
and smaller than 80mm with concave curvature.
5.5.2 The thickness of the measuring object is smaller than 2mm.
5.5.3 The layer thickness is smaller than 2mm.
5.5.4 The distance of the measuring position to the edge is smaller than 2mm.
5.6 CALIBRATION
Base unit shall be calibrated annually or after major repair as per AWS A4.2M
The base of the calibration standard set is used for the normalization. Three
calibration standards are used in addition to the base for the periodic verification
and corrective calibration. The average value of five measurements at individaul
position on the calibration standard shall be within the maximum deviation
specified in table below.
INTERNATIONAL INSPECTION CENTRE W.L.L
(INTREX) Page8 of 8
Tel: 23986748, 23988915 Fax No. 23986749 Date: 25.07.2015
FERRITE CONTENT MEASUREMENT Doc . No. VG3100-001-A-3014,Rev.F1
PROCEDURE
Normalization and calibration measurements shall be taken also on the base of the
calibration standards.
Normalization and calibration measurements are to be taken within a circular area
having a diameter of 10 mm around the center of the base or the calibration
standard.
5.7 NORMALISATION
Normalization is performed for adjusting the measuring instrument to a new zero
value.
5.8 SURFACE PREPARATION
The Test area shall be free from grease,dirt etc. There should not be any items near
the object which may interfere with the magnetic characteristics of the
measurement.
5.9 OPERATION AND STORAGE OF INSTRUMENT
Instrument and accessories are designed for use at temperature between 5 and 45
deg C. Storage shall be done at temperature between 5 and 60 deg C.
The instrument is to be effectively shielded from electromagnetic fields
(eg.motors,power lines etc.)
Instrument and accessories are to be protected from static charge.
5.10 RECORDS
The FN no. of the deposited weld metal of all austenitic stainless steel shop and
field welds shall be in the range of 3 FN to 8 FN.For (super) duplex stainless steel
the FN shall be in the range of 40% - 60% for parent metal and HAZ, and in the
range of 30% - 60% for the weld Metal
Ferrite Numbers shall be measured in accordance with ISO 8249.
6.0 SAFETY
4.11.1The area of examination shall have adequate lighting and ventilation.
4.11.2 Fire and Safety Regulation of Client shall be adhered.
7.0 ATTACHMENTS
5.1 ATTACHMENT- A Report Form
INTERNATIONAL Head Office: East Ahmadi, Block
INSPECTION No.6, Plot No.142, P.O.Box No.296,
Sabahiya, 54573 Kuwait.
CENTRE W.L.L Tel : 23986748, 23988915, 23984391,
Paid Capital 23984389, Fax : 23986749
QA/QC FORMAT: IIC/035/01 REV0
FERRITE MEASUREMENT REPORT
Client : Report No :
Project No : Date :
Tittle : Equipment Model :
Procedure No : Probe Model :
Test Description :
Ferrite No. (FN) / %
Part Location Remarks
1 2 3 Average
TESTED BY REVIEWED BY APPROVED BY
Name
Sign
Date
Attachment A to Doc. No. VG3100-001-A-3014, Rev.F1
