HAZOP (Hazard and Operability study)

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HAZOP (Hazard and Operability study) 5. Penentuan Risk Ranking Berdasarkan MIL-STD-882D Category High Medium High

Significance Component Acquisition Executive Program executive officer

Medium Low

Program Manager As directed

Description

Frequent Probable Occasional Remote Improbable

Description determining actions necessary, incidents, or malfunctions; and requesting waivers for safety requirements and program deviations Use PPE and SOP

Level

Probability

A B C D E

<10-1 10-1 s/d 10-2 10-2 s/d 10-3 10-3 s/d 10-6 > 10-6

Description

Category

Catastrophic

I

Critical

II

Marginal

III

Negligible

IV

Significance Could result in death, permanen total disability Could result in permanent partial disability, injuries or occopational illness that may result in hospitalization of at least three personal Could result in injury or occupation illness resulting in one or more lost work days. Could result in injury or illness not resulting in a lost work day

www.themegallery.com

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HAZOP (Hazard and Operability study) Node Deviasi Cause

A

: Truck LPG Liquid Loading : High Pressure : Valve on vapor return line not opened SDV 2X02,HV 2X08, dan HV 2X09

B

C

Q = A∪ B ∪C P(Q) = P( A ∪ B ∪ C ) = P(A) + P(B) + P(C) − P(A ∩ B) − P(A ∩ C) − P(B ∩ C) + P(A ∩ B ∩ C) = 0.0012 Sehingga Frekuensi terjadinya deviasi sebesar 0.0012 masuk dalam kategori C


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HAZOP (Hazard and Operability study) Node Deviasi Consequence

: Truck LPG Liquid Loading : High Pressure : Over pressure on pipe, skid tank, and leaked on TLA (Truck Loading arm)

Dimodelkan dengan simulasi Shellfred Hole Size

Injury

Massflow Rate (kg/s)

0.25 Inch

no Skin demage

0.66

1 Inch

First degree burn

10.61

Rupture

Second degree burn

57.07

Diambil skenario hole size 1 inch sehingga operator yang mengalami luka bakar akan berjumlah lebih dari 3 orang sehingga masuk dalam kategori II.

Hole Size 0.1 inch

Sehingga frekuensi dengan kategori C dan consekuensi kategori II menunjukkan level resiko Medium Risk . www.themegallery.com

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Bow Tie Diagram Bow Tie diagram merupakan suatu visualisasi Process Hazard dan Kesuluruhan kemungkinan proses dapat diketahui dengan pendekatan boolean. Konsekuensi dari HAZOP Couse dari HAZOP

Safeguard dari HAZOP


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Add your company Level slogan Safety Integrity

Safety Integrity Level Safety Integrity Level (SIL) merupakan suatu pengelompokan peforma suatu peralatan yang menjalankan Safety Instrument function (SIF).

Parameter SIL : Availability dan PFD(probability failure on demand)

www.themegallery.com Hyatt Nigel, Guidelines for Process Hazard analysis, hazard Identification & Risk Analysis page 20-3

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Analisa Data Resume Hazop

1 4 1

1

16 19


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Analisa Data Hasil Screening Hazop Node

deviasi

Cause

Consequence

Safeguard

1

High level

Human error when operation,there are still previous product left on the truck

over pressure on skid tank, leak on TLA

PSV on skid tank

1

High Pressure

valve at vapour return line isn't opened

over pressure on skid tank, leaked on TLA

PSV on skid tank and .Pressure alarm

2

No Flow

SDV-1X05, SDV-2X02, HV2X06, and HV-2X09 is closed

over pressure on pipe, leaked on TLA

PSV on skid tank

over pressure on skid tank

PSV on skid tank

SDV-1X05, SDV-2X02, HV2X06, and HV-2X09 not imperfect valve opened

over pressure on skid tank, leaked on TLA

PSV on skid tank

2

Low Flow


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Analisa Data Scenario

PFD

No release

3.69E-02

No Flame

9.46E-03

Jet Fire

2.43E-04

* No release is condition where no LPG release on enviroment when overpressure occur * No flame is condition where LPG release on enviroment and not ignition (safe dispertion) * Jet Fire is condition where LPG release on enviroment and ignition.

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Kesimpulan  Berdasarkan analisa HAZOP terdapat Risk ranking ketegori Medium High Risk 4 titik dan high risk 1 satu titik, keempat titik tersebut terdapat pada daerah filling shed.  Jika sistem mengalami over pressure, kemungkinan 3 skenario kejadian yang mungkin akan terjadi meliputi no release dengan probability 3.69E-02, no-flame dengan probability 9.46E-03, dan Jet-fire dengan probability 2.43E-04.  Skenario berpeluang terjadinya jet fire sebesar 2.43E-04. Nilai 2.43E-04 masuk dalam kriteria SIL 3.  Peforma layer protection yang terdapat di filling shed sesuai dengan yang di gunakan pada terminal LPG Zhuhai, Guandong, China yaitu SIL 3. LOGO

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Review  Terminal LPG bergerak di bidang jasa penerimaan, pencampuran, penimbunan, dan enyaluran LPG .  Kesalahan Operasi pada sebuah Terminal LPG akan berdampak pada operasional dan operator.  Untuk mengatasi kesalahan Operasi, Terminal LPG Zhuhai, Guandong,China menerapkan SIL-3.  Dari hasil analisa peforma layer protection yang terdapat di filling shed Terminal LPG masuk dalam kriteria SIL 3 dengan nilai PFD 2.43E-04 .

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HAZOP (Hazard and Operability study)

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