Kndt Ndep Vt Spsc 001 Rev.0

Korea NonDestructive Testing Co., Ltd.Document No. KNDT - NDEP - VT - SPSC - 001 Revision No.

0Revision DateDec. 30, 2010

Subject VISUAL EXAMINATIONPROCEDURE

Issued Dep'tTech. Dep't

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KNDT Form No. QA-001(2)(A4 210×297 )㎜ Korea NonDestructive Testing Co., Ltd.

비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서비 파 괴 검 사 절 차 서Non-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination ProcedureNon-Destructive Examination Procedure

문서제목Title ( ) 육안검사 절차서Visual Examination Procedure

문서번호Document Number ( ) KNDT-NDEP-VT-SPSC-001개정번호Revision Number ( ) 0

개정일자Revision Date ( ) -제정일자Issued Date ( ) Dec. 30, 2010

Issued Dep't 작성부서( ) Technical Department

작성자Prepared by ( ) Ju Hyun, ParkKNDT Level Ⅱ Dec. 30, 2010

검토자Reviewed by ( ) Chang Su, JangKNDT Level Ⅲ Dec. 30, 2010

승인자Approved by ( ) Cheon Woong, ParkKNDT Level Ⅲ Dec. 30, 2010

비고Remarks ( )

* This procedure has been demonstrated to the satisfaction of the AI in accordance withrequirement of ASME code section V.Procedure Demonstrated byKNDT Level ⅢProcedure Demonstrated to theSatisfaction of AICertified by Client





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개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장개 정 현 황 대 장Revision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision SheetRevision Sheet

문서명

Title

육안검사 절차서

Visual Examination

Procedure

문서번호

Doc. No.KNDT-NDEP-VT-SPSC-001

개정번호

Rev. No.

개정일

Rev. Date

개정부서

Rev. Dep't

개 정 내 역

Cause of the Revision

비고

Remark

0 Dec. 30, 2010 Tech. Dep'tIssued procedure for Stack Damper①

inspection





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TABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTSTABLE OF CONTENTS

PARAGRAPH TITLE

1.0

2.0

3.0

4.0

5.0

6.0

7.0

8.0

9.0

SCOPE

REFERENCES

PROCEDURE QUALIFICATION

PERSONNEL

EQUIPMENT

TECHNIQUES

EVALUATION

ACCEPTANCE STANDARD

RECORDS





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REFLECTION STATUS FOR REQUIREMENTS OF AN VISUAL EXAMINATION PROCEDURE

No. RequirementEssential

Variable

Nonessential

VariableParagraph

1 Change in Technique used

2 Direct to or from translucent × 6.3 & 6.5

3 Direct to remote × 6.3 & 6.4

4 Remote visual aide × 6.4

5 Personnel performance requirements, when required × 4.0

6 Lighting intensity (decrease only) × 6.3

7Configurations to be examined and base material

product forms (Pipe, plate, forgings, etc.)× 1.0 & 6.3

8 Lighting Equipment × 6.3

9 Method or tools used for surface preparation × 6.1

10 Equipment or devices used for a direct technique × 5.2

11 Sequence of examination × 6.4

12 Personnel qualifications × 4.0





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1.0 SCOPE

This procedure describes to determine such things as the surface condition of the part,

alignment of mating surfaces shape or evidence of leaking and the direct visual

examination and remote visual examination for Stack Damper and related services.

2.0 REFERENCES

2.1 T10144-SD-V008, (Rev.00) Material Purchase Specification

2.2 ASME Sec. , Art. 9Ⅴ 2007 Ed. through 2009 Add.

2.3 ISO 5817 2003 Ed.

2.4 SNT-TC-1A 1992Ed. through 2006 Ed.

2.5 KNDT-A402, (Rev.3) Qualification and Certification of NDE Personnel

3.0 PROCEDURE QUALIFICATION

3.1 This procedure shall be demonstrated to the satisfaction of the AI and QA/QC section

chief of client before use.

3.2 When procedure qualification is specified, a change of a requirement in Table identified

as an essential variable shall require re-qualification of the written procedure by

demonstration. A change of a requirement identified as a nonessential variable from those

specified within the written procedure shall require revision of, or an addendum to, the

written procedure.

4.0 PERSONNEL

4.1 Personnel who perform this examination shall be qualified in accordance with QA

Procedure "Qualification and Certification of NDE Personnel" KNDT-A402 which meets【】

the requirements of ASME Code and ASNT Recommended Practice, SNT-TC-1A.

4.2 Only qualified and certified Level or Level personnel shall interpret test results toⅡ Ⅲ

determine acceptability.





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5.0 EQUIPMENT

5.1 Visual aids

5.1.1 Mirror

5.1.2 Magnifying glass

5.1.3 Borescope

5.1.4 Fiber scope

5.1.5 Telescope

5.2 Machine aids

5.2.1 Scale

5.2.2 Vernier calipers

5.2.3 Dial caliper

5.2.4 Micrometer

5.2.5 Dial indicator

5.2.6 Combination square set

5.2.7 Gap gauge

5.2.8 Cambridge gauge

5.2.9 Fillet welding gauge

5.2.10 High-low gauge

5.2.11 Welding gauge





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6.0 TECHNIQUE

6.1 Applications

Visual examination is generally used to determine such things as the surface condition of the

part, alignment of mating surfaces, shape, or evidence of leaking. In addition, visual

examination is used to determine a composite material's (translucent laminate) subsurface

conditions.

6.2 Direct Visual Examination

Direct visual examination may usually be made when access is sufficient to place the eye

within 600 of the surface to be examined and at an angle not less than 30°. to the㎜

surface to be examined. Mirrors may be used to improve the angle of vision, and aids

such as a magnifying lens may be used to assist examinations. Illumination (natural or

supplemental white light) for The specific part, component, vessel, or section thereof,

being examined is required. The minimum light intensity at the examination surface / site

shall be 1000Lux. The light source, technique used, and light level verification is required to

be demonstrated one time, document and maintained on file.

6.2.1 Visual examination personnel shall have an annual visual examination to assure natural or

corrected near distance acuity such that they are capable of reading standard J-1 letters

on standard Jaeger test type charts for near vision or equivalent methods.

6.3 Remote Visual Examination

In some cases, remote visual examination may have to be substituted for direct

examination. Remote visual examination may use mirrors such systems shall have a

resolution capability at least equivalent to that obtainable by direct visual observation.

6.4 Sequence of Visual examination

1) Identify the configuration drawing of part to be examined.

2) Establish the plan for the visual examination using checklist.

3) Determine the examination technique.

4) Prepare the necessary equipments, visual aids and measuring aids.

5) Preparation of surface.

6) Check the light intensity by using light meter with valid certificate on surface to

examined.

7) Perform visual examination.

8) Evaluation.

9) Mark out the visual examination report.

10) Verify the visual examination result using checklist.





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7.0 EVALUATION

7.1 Symbols

The following symbols are used in Table 1.

a nominal throat thickness of the fillet weld (see also ISO 2553)

b width of weld reinforcement

d diameter of pore

h height or width of imperfection

I length of imperfection in longitudinal direction of the weld

Ip length of projected or cross-section area

s nominal butt weld thickness (see also ISO 2553)

t wall or plate thickness (nominal size)

wp width of the weld or width or height in case of fracture area

z leg length of a fillet weld (see also ISO 2553)

β angle of weld toe

fJ angle of angular misalignment

7.2 Assessment imperfection

Limits for Imperfections are given in Table 1. These limits apply to the finished weld and may

also be applied 10 an intermediate stage of fabrication.

If, for the detection of imperfections, a method other than macro examination is used, only

those imperfections shall be considered which can be detected using a magnification equal to

or less than tenfold.

7.2.1 Excluded here from are cold laps (see Table 1, 1.5) and micro cracks (see Table 1, 2.2).

Systematic imperfections are only permitted in quality level D, provided other requirements

of Table 1 are fulfilled. A welded joint shall normally be assessed separately for each

individual type of imperfection. Different types of imperfection. occurring at any

cross-section of the joint, which weaken the cross section may need special consideration

(see multiple imperfections), The limits for multiple imperfections (see Table 1) are only

applicable for cases where the requirements for a single imperfection are not exceeded.

7.2.2 Any two adjacent imperfections separated by a distance smaller than the major dimension of

the smaller imperfection shall be considered as a single imperfection.

8.0 ACCEPTANCE STANDARDS

8.1 Limits for imperfections (Refer to Table 1)





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9.0 RECORDS

9.1 The results shall be recorded in the attached form by the certified personnel who

perform the visual examination.

9.2 A written report of the examination shall contain the following information:

(a) the date of the examination;

(b) procedure identification and revision used; (c) technique used;

(d) results of the examination;

(e) examination personnel identity, and, when required by the referencing Code Section,

qualification level;

(f) identification of the part or component examined.





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Documents

Kndt Ndep Vt Spsc 001 Rev.0