ASME CODE

[박수영]

1. Code의 발생기원

ASME의 Abbreviation은 The American Society of Mechanical Engineers입니다. ASME Code의 발행기원은 1800년대 말 미국을 위주로 해서 압력용기 및 보일러의 사고가 잦았고, 이에 국가적인 대책을 마련코져 미국 및 국제적인  Standards들을 조합하여 ASME Code를 만들었습니다.

Code라 하면은 항상 ASME Code를 일컫는 약어로 쓰이고, ASME Code Book or ASME Code Break라고도 일컫습니다.

2. Code Book의 구성

Sections

I: Rules for Construction of Power Boilers(화력발전보일러의 건설규정)

II: Materials(자재규격)

    Part-A: Ferrous Material Spec.(철)

    Part-B: Nonferrous Material Spec.(비철)

    Part-C: Spec. for Welding Rods, Electrodes, and Filler Metals(용접봉)

    Part-D: Properities(물성치)-Eval‎uated Temp.에서의 금속의 허용응력(Allowable Stress)로 강도계산의 기준이 됨.

III: NCA – Nuclear requirement

IV: Rules for Construction of Heating Boilers

V: Nondestructive Examination(비파괴)

VI: Recommended Rules for the Care and Operation of Heating Boilers

VII: Recommended Guidelines for the Care of Power Boilers

VIII: Rules for Construction of Pressure Vessels(압력용기의 건설규정)

      Division-1(일반)

Division-2: Alternative Rules(대체규정 또는 Section-VIII의 일반요구사항 기준 선택적 규정)

      Division-3: Alternative Rules for Construction of High Pressure Vessels(고압용기의 선택적 건설규정)

IX: Welding and Brazing Qualifications(용접과 납땜 인증)

X: Fiber-Reinforced Plastic Pressure Vessels

XI: Rules for Inservice Inspection of Nuclear Power Plant Components

XII: Rules for Construction and Continued Service of Transport Tanks

*** Code는 매 3년마다 신규본(Edition)이 발행됩니다.

 e.g) 2004Ed. à 2005Add. à 2006Add. à 2007Add. à 2007Ed.

Addenda

색지로 나오며, 매년 구매자에게 자동적으로 배부가 되며, Edition기준 수정된 Page라고 보시면 됩니다.

Interpretations

기술질의에 대한 공식적인 회신. 매년 7월과 12월에 발행되며, 이해하기 쉽게 대법원의 "판례"쯤으로 해석하면 쉽죠.

Code Cases

위원회에서 수시로 정기적인 모임을 통하여 추가/수정, Code에 없는 자재등의 내용등을 고려하고, 일부는 다음 Edition/Addenda에 정식 Code의 Requirement로 채택되기도 합니다. Addenda와 마찬가지로 매년 구매자에게 자동적으로 배부가 됨.

3. 주요 Study Code

I: Rules for Construction of Power Boilers(화력발전보일러의 건설규정) - HRSG

II: Materials(자재규격)

    Part-A: Ferrous Material Spec.(철)

    Part-B: Nonferrous Material Spec.(비철)

    Part-C: Spec. for Welding Rods, Electrodes, and Filler Metals(용접봉)

    Part-D: Properities(물성치)-Eval‎uated Temp.에서의 금속의 허용응력(Allowable Stress)로 강도계산의

기준이 됨.

V: Nondestructive Examination(비파괴)

VIII: Rules for Construction of Pressure Vessels(압력용기의 건설규정)

      Division-1(일반)

Division-2: Alternative Rules

IX: Welding and Brazing Qualifications(용접과 납땜 인증)

4. Code별 Key Subsections and/or Parts

4-1. Section-II, Part-A(S: ASME, A: ASTM)

SA-20: General Requirements for Steel Plates for Pressure Vessels

SA-36: Carbon Structural Steel

SA-53: Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

SA-105: CS Forgings for Piping Applications

SA-178: ERW CS and Carbon-Mn Steel Boiler and Superheater Tubes

SA-179: Seamless Cold-Drawn Low-CS H/EX and Condenser Tubes

SA-182: Forged or Rolled Alloy-SteelPipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service

SA-192: Seamless CS Boiler Tubes for High-Pressure Service

SA-193: Bolts

SA-194: Nuts

SA-203: Pressure Vessel Plates, Alloy Steel, Nickle

SA-204: Pressure Vessel Plates, Alloy Steel, Molybdenum

SA-210: Seamless Medium-Carbon Steel Boiler and Superheater Tubes

SA-213: Seamless Ferrite and Austenitic alloy-Steel Boiler, Superheater, and Heat-Exchanger Tube

SA-214: ERW CS H/EX and Condenser Tubes

SA-240: Heat-Resisting Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels

SA-266: CS Forgings, for Pressure Vessel Components

SA-283: Low- and Intermediate Tensile Strength CS Plates

SA-299: Pressure Vessel Plates, CS, Manganese-Silicon

SA-312: Seamless and Welded Austenitic Stainless Steel Pipes

SA-333: Seamless and Welded Steel Pipe for Low-Temperature Service

SA-334: Seamless and Welded Carbon and Alloy Steel Tubes for Low-Temperature Service

SA-335: Seamless Ferritic Alloy-Steel Pipe for High-Temperature Service

SA-350: Carbon and Low-Alloy Steel Forgings, Requiring Notch Toughness Testing for Piping Components

SA-370: Test Methods and Definitions for Mechanical Testing of Steel Products

SA-387: Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum

SA-515: Pressure Vessel Plates, CS, for Intermediate- and Higher-Temperature Service

SA-516: Pressure Vessel Plates, CS, for Moderate- and Lower-Temperature Service

SA-530: General Requirements for Specialized Carbon and Alloy Steel Pipe

SA-537: Pressure Vessel Plates, Heat-Treated, Carbon-Manganese-Silicon Steel

SA-572: High-Strength Low-Alloy Columbium-Vanadium Structural Steel

SA-1008: Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-alloy and High-Strength Low-Alloy With Improved Formability

Section-VIII, Division-1

UG-77: Material Identification

UG-80: Permissible Out-of-Roundness of Cylindrical, Conical, and Spherical Shells

UG-81: Tolerance for Formed Heads

UG-84: Charpy Impact Tests

UG-99: Standard Hydrostatic Test

UG-115~120: Marking and Reports

UW-3: Welded Joint Category(Quiz: Hemi. Head의 Welded Joint Category? A, B, C, D)

UW-11: Radiographic and Ultrasonic Examination

UW-12: Joint Efficiencies

UW-33: Alignment Tolerance

UW-40: Procedures for Postweld Heat Treatment

UW-51: Radiographic and Radioscopic Examination of Welded Joints

UW-52: Spot Examination of Welded Joints

UCS-56: Requirements for Postweld Heat Treatment(Table에서 면제가 안되는 용접부는 PWHT 요구됨)

Table UCS-56.1: Alternative Postweld Heat Treatments for Carbon and Low Alloy Steels(요구사항의 온도보다

낮은 온도에서 열처리 되어야 할 경우 Holding Time을 증가시킴으로 해서 PWHT 요구사항

을 만족시킴)

Table UCS-57: Thickness Above Which Full Radiographic Examination of Butt Welded Joint is Mandatory.

UCS-66: Low Temperature Operation (Material) – VIII-1 Code에서 가장 빈도수 및 중요도가 높은 장임.

UCS-67: Impact Tests of Welding Procedures

UCS-68: Design (Impact Test 실시를 결정하는데 필요한 공칭두께결정)

             Quiz. (a) 기준 2:1 Ellip. Head to Shell의 Impact Test 결정에 필요한 공칭두께는? 얇은 쪽 Head

                   (용접부 두께를 결정짓는 두께를 대부분 공칭두께로 간주함)

UCS-79: Forming Shell Sections and Heads(연신율에 따른 열처리 조항)

UCS-85: Heat Treatment of Test Specimen(금속의 변태점, Low-Transformation Temperature, 이상의 열이

가해지는 열적인 처리가 있을 경우 자재에서부터 그 조건으로 시편 Test 요구됨)

UHA-32: Requirements for Postweld Heat Treatment

UHA-51: Impact Tests - VIII-1 Code에서 빈도수 및 중요도가 높은 장임.

Mandatory Appendices (강제 적용되는 부록)

3: Definitions

26: PV and H/EX Expansion Joints

Nonmandatory Appendices (비 강제 적용되는 부록)

A: Allowable Loads for Tube-to-Tubesheet Joints

R: Preheating

W: Manufacturer’s Data Reports

GG: 단위환산

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