proses pemilahan material 1

8/10/2019 Proses Pemilahan Material 1

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CODE & STANDARDS PADA

PROCESS INDUSTRYSecara garis besar CODES & STANDARDS berisikan:

1. Material

- Chemical composition- Mechanical requirements

2. Dimension

- General dimensions and tolerance

3. Fabrication codes

- Welding

- Threading


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BERAPA STANDARD & CODE

INTERNATIONAL

ASTM (American Society for Testing and Materials)

AWWA (American Water Works Association)

AWS (American Welding Society) MSS (Manufacturers standardization Society)

SAE (Society of automotive Engineers)

NACE (National Association of Corrosion Engineer)

ASME (American Society of Mechanical Engineers)

API (American Petroleum Institute )


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API


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ASME (American Society of

Mechanical Engineers)1. ASME 3.1 Piping and Piping Systems

- B31.1 Power piping (Piping for Industrial and marine application)

- B31.2 Fuel gas Piping

- B31.3 Process piping

- B31.4 Pipeline transportation system for liquid hydrocarbon and otherliquids

- B31.5 Refrigeration piping and heat transfer component

- B31.8 Gas Transmission and Distribution Piping system

- B31.9 Building service piping

- B31.11 Slurry Transportation Piping System


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ASME (American Society of MechanicalEngineers)

2. ASME Boiler and Pressure Vessel Code section

- Section I. Power Boilers

- Section II. Material

- Section III.1 Rules for Nuclear Power Plant Components

- Section III.2 Code for concrete reactor vessel &containments

- Section IV Heating Boilers

- Section V Nondestructive Examination

- Section VI Recommended Rules for the Care andOperation of heating boilers

- Section VII Recommended Guidelines the Care of PowerBilers

- Section VIII.1 Pressure Vessels Div.1- Section VIII.1 Pressure Vessels Div.2

- Section IX Welding and Brazing Qualification

- Section X Fiber-Reinforced Plastic Pressure Vessels

- Section XI Rules for Service Inspection of Nuclear Power

Plant Components


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Keterangan:


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PIPING COMPONENT1. PIPAA. Material

- Ferrous (Logam) Std ASME 36.10

- Non Ferrous (Bukan logam) Std ASME 36.19

B. Construction

- Seamless

- Welded

C. Size- 1 in to 80 in

D. Connection

- PE (Plan End )

- BE (Bevel End)


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PIPING COMPONENT2. Fitting ( Sambungan )

A. Type

- Elbow 90, Elbow 45,

- Reducer

- Tee : Equal Tee, Reducer Tee

- Connection (Sambungan)

- Butt weld Ends (std ASME 16.9)

- Threaded, Socket (std ASME 16.11)

B. Flange

- Standard : ASME 16.5 for size 1 in24 in

- Standard : ASME 16.47 for size 26 in60 in


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VARIABEL

Istilah- NPS : Nominal pipe size

- Out Side Diameter (Diameter Luar) -> Tabel

- In Side Diameter (Diameter Dalam)

- Thickness (Ketebalan ) MNF Std

- Sch. 10 ----- -

- Sch. 20 ----- -

- Sch. 30 ----- -- Sch. 40 ----- STD

- Sch. 80 ----- XS


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KETEBALAN PIPA ASME B 31.3

C = Ca + CM

CA : Corrosion Allowance

CM : Mechanical Allowance


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CONTOH

Pada sistem perpipan diketahui

Tentukana. Ketebalan minimum yang diperlukan secara teoricalb. Ketebalan Minimum (Nominal wall thicknes) sesuai ASME 36.10


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Penyelesaian

Diket

Tekanan : P= 1200 psi

Temperatur : 680 F

Material : ASTM A106 Gr BNPS : 10

Corrosion Allowance : 1/16

Mechanical Allowance : 0.05

Ditanyaa. Ketebalan minimum yang diperlukan secara teorical

b. Ketebalan Minimum (Nominal wall thicknes) sesuai ASME36.10


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Penyelesaian

Jawab

a. tm = t + C

t = PD / 2 (SE + PY )

SE pada 680 F = 16.88 Ksi Tabel ASME

= 16880 psi

Y = 0.4

D = 10.75 in see ASME 36.10

Maka t = 1200 psi . 10.75 inc / 2 ( 16880 psi + 1200 psi. 0.4)

= 0.372 Inch


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Penyelesaian

Maka t = 1200 psi . 10.75 inc / 2 ( 16880 psi + 1200 psi. 0.4)

= 0.372 Inch

tm = t + C= t + CA + CM

= 0.372 inch + 0.0625 inch + 0.05 inch

= 0.4845 In

Jadi Wall thickness secara teorical 0.4845 in

b. Minimum nominal wall thickness adalah

Reffer to ASME 36.10

t = 0.500 inch

Sch 60


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Keterangan:


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Keterangan:


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Keterangan:


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LAMPIRAN FROM ASME B31.3

LAMPIRAN ASME B 36 10


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LAMPIRAN ASME B.36.10

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