Hazop Evaluation and Safety Integrity Level (SIL) analysis on steam system in ammonia plant PetroKimia Gresik Ltd.

Ali Musyafa*, Zahrotul Fajri Nuzula, Muhammad Khamim Asy'ari

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


Steam is utilized to actuate 101 JT and 103 JT compressor turbines in the ammonia making process. Steam production is done through several processing steps in several units. HAZOP method and Safety Integrity Level (SIL) analysis is to observe the risk level using Fault Tree Analysis (FTA) method to calculate the security level of each node. The nodes used are deaerator, steam drum, and superheater burner. The hazard risk level is obtained from the multiplication of likelihood and consequence based on Petrokimia Gresik Ltd. standard. SIL value of the system is derived from the calculation of Probability Failure on Demand (PFD) total value in the Safety Instrumented System (SIS) arranged in each unit. Based on the analysis results, it was obtained that "high" of the hazard level occurred on steam drum with low level deviation and superheater burner with high pressure deviation. The PFD total value on the steam system was 0.06845 and classified as SIL 1. A given recommendation to decrease the risk level on superheater burner node with high pressure deviation was done by adding transmitter. SIL value obtained both before and after adding transmitter was SIL1. However, the RRF value before the component addition was 20.1 but 37.7 after component addition. It indicated that the component addition can reduce the risk on the system.

Original languageEnglish
Title of host publicationAdvanced Industrial Technology in Engineering Physics
EditorsAgus Muhamad Hatta, Katherin Indriawati, Gunawan Nugroho, Totok Ruki Biyanto, Dhany Arifianto, Doty Dewi Risanti, Sonny Irawan
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735418189
Publication statusPublished - 29 Mar 2019
Event2nd Engineering Physics International Conference 2018, EPIC 2018 - Surabaya, Indonesia
Duration: 31 Oct 20182 Nov 2018

Publication series

NameAIP Conference Proceedings
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616


Conference2nd Engineering Physics International Conference 2018, EPIC 2018


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