Safety Integrity Level Assessment the Safety Guard Design Case of Electrical Eyelet Riveting Machine in One Leather Shoes Factory in Khon Kaen Province

Abstract

The industrial production process involves the use of machinery and has been increased in Thailand. Problems with workplace accidents involving employees have been encountered. The causes of these accidents involved human factors, machinery, the working environment, and safety management. The Shoes factories often experience frequent workplace accidents involving machinery. This study aims to assess the Safety Integrity Level  of the safety guard design case of electric eyelet riveting machine in one leather shoe factory in Khon Kaen Province using the Safety Integrity Level method. The evaluation process is as follows: 1) Determine the severity of the hazard (S), 2) Determine the frequency score of the hazard occurrence (F), 3) Determine the probability score of the hazard occurrence (W), 4) Determine the likelihood score of avoiding the hazard (P),then, calculate the total score using the formula K = F + W + P. Once the score is obtained, find the SIL value by comparing the intersection point between S and K. The evaluation was performed both before and after installing the guard plate among 24 volunteers in the design and assessment the safety guard design case of electric eyelet riveting machine The results of this research found that the safety assessment of electrical eyelet riveting machines before installing the guard has a Safety Integrity Level of SIL level 1 (SIL1) and after installing a plate protection guard has a safety X level. This can be seen that after installing the plate guard in electrical eyelet riveting machines, The better Level (of SIL) than before installing the guard.Therefore The operators working with electric eyelet riveting machines could be more safer than before implementation.