05. Bolt Tightening and Torquing [General Information] Bolts may seem simple, but in reality the proper manufacturing of bolted joints requires careful study. Tightening the bolt puts the shank in tension, counteracted by compressive forces on the contact surfaces of the head and the nut, transferred from the parts. Inadequate preload is a common cause for bolted […]
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04. Backfilling Work Excavation and backfilling of soil is a very important part of construction process, and care must be taken while excavation in safety perspective. Different soil layers may be encountered while excavation, dewatering may be needed sometimes. These points must be kept in mind to take necessary action during excavation and backfilling. ∴
03. Asphalt Works Asphalt paving works is a composite material commonly used to surface roads, parking lots, airports and other such places. It lays the asphalt flat and provides minor compaction before it is compacted by a roller. ∴ 아스팔트 공사하는 모습을 운전하시면서 종종 보셨을 거예요. 많은 건설장비가 투입되어 장비사고 위험이 높습니다. 사용 중인
Air flushing provides an efficient method of removing debris from pipelines and newly constructed systems. ∴ In the gas process lines, the velocity should be the lowest figure between 60 m/s and the velocity obtained at 1.3 time the maximum process flow rate. The minimum velocity should be 30 m/s. In liquid process lines, a
01. Air Blowing Test Air Blowing can be used as a safer, more environmentally friendly and cost effective alternative to conventional cleaning and steam blowing. The purpose of air blowing is to remove loose scale and debris prior to start up using compressed air as the cleaning medium. The velocity of a large air mass
A Job Safety Analysis (JSA), also known as a Job Hazard Analysis(JHA), is to identify hazards before they occur. It is on the relationship between workers, tasks, equipment, devices and working environment. After you identify uncontrolled hazards, you should carry out four steps to eliminate or reduce it to an acceptable risk level. ∴ 1. Select
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