LOW Pressure TANK(API 620) 검사 코드 요건

♣ API 620
Design and Construction of Large, Welded, Low-Pressure Storage Tanks
♠ NDE 요건 적용코드 요약
★ 정의 (Definitions)
- MT : Magnetic Particle Examination
- PT : Liquid Penetrant Examination
- Pen Oil : Penetrating Oil Test
- RT : Radiographic Testing
- UT : Ultrasonic Testing
- VB : Vacuum Box Testing
- VE : Visual Examination

★ 합부판정 (Acceptance Standards)
- MT : ASME Section VIII, Appendix 6, Paragraphs 6-3, 6-4, 6-5
- PT : ASME Section VIII, Appendix 8, Paragraphs 8-3, 8-4, 8-5
- RT : ASME Section VIII, Paragraphs UW-51(b)
- UT : ① RT 를 대체할 때 → API 620, Section 5.26, Q.5.6 or R.5.6, Provision U.6.6
② 원래 UT 대상 → 구매자(Purchaser)와 제작자(Manufacturer)간 사전 협의를 통해 허용범위 설정
- VB : API 620, Section 7.15.7.9
- VE : API 620, Section 7.15.5.3 and 7.15.5.4
※ASME Section VIII = Rules for Construction of Pressure Vessels
★ 검사원 자격증명 (Examiner Qualifications)
- MT : API 620, Section 7.15.2.3
- PT : API 620, Section 7.15.4.3
- RT : ASNT Level II or III
- UT : ① RT 를 대체할 때 → API 620, Section 5.26, Q.5.6 or R.5.6, Provision U.4.1
② 원래 UT 대상 → 제작자(Manufacturer)가 ASNT SNT-TC-1A 요건에 맞춰 자격부여
- VB : API 620, Section 7.15.7.4
- VE : API 620, Section 7.15.5.1
※ ASNT = The American Society for Nondestructive Testing

★ 절차서 요건 (Procedure Requirements)
- MT : ASME Section V, Article 7
- PT : ASME Section V, Article 6
- RT : 별도 절차서 필요없으나, ASME Section V, Article 2 검사방법을 따라야 함
- UT : ① RT 를 대체할 때 → API 620, Section 5.26, Q.5.6 or R.5.6, Provision U.3.5
② 원래 UT 대상 → 제작자(Manufacturer)가 ASME Section V, Article 4 요건에 맞음을 증명해야 함
- VB : API 620, Section 7.15.7.1~7.15.7.3, 7.15.7.5~7.15.7.8, 7.15.7.10
- VE : 없음
※ASME Section V = Nondestructive Examination





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