18. Hydrotest Hydrotest is a way of checking the integrity of pressure vessels, pipelines, cylinders, boilers, storage tanks as well as fuel tanks. With the help of this test, pressure tightness, strength and any leakages are checked. Hydrotest involves a test which is performed with the help of water (which is why this test is […]
17. HVAC Duct Installation & Insulation HVAC is an abbreviation for Heating, Ventilation and Air Conditioning, and refers to the climate control systems installed in homes or commercial properties. Their task is to move heated or cooled filtered air throughout the building, to keep inhabitants of the structure comfortable. ∴ ∴ Hazard Category Hazards Controls Slips and Trips
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16. HDPE Installation High-density polyethylene (HDPE) is an extremely versatile material that is utilized for a number of engineering works. As one of the most versatile plastic materials around, HDPE plastic is used in a wide variety of applications, including plastic bottles, milk jugs, shampoo bottles, bleach bottles, cutting boards, and piping. Known for its
15. Grit Blasting (Sand Blasting) Abrasive grit blasting (also commonly known as abrasive blasting or sandblasting) involves forcibly propelling an abrasive material against a surface under high pressure. Different variants of the blasting process involve different media, which range in their levels of abrasiveness, with some being highly abrasive while others are very mild in effect. The most abrasive methods include shot blasting (which uses metal shot) and sandblasting. ∴ ∴ Hazard Category Hazards Controls Foreign Bodies in Eyes 1. With the
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14. Grinding (그라인더 사용) Grinding is the process of removing metal by the application of abrasives which are bonded to form a rotating wheel. When the moving abrasive particles contact the workpiece, they act as tiny cutting tools, each particle cutting a tiny chip from the workpiece. ∴ ∴ Hazard Category Hazards Controls Particles in The Eye 1. Can occur through attempting to lift.
13. Grating Installation The steel grating can be installed and fixed in many ways. Typically, welding installation, fastener fixing and angle steel fixing are three methods we commonly used for steel grating installation. ∴ ∴ Hazard Category Hazards Controls Falls of Materials/ Tools 1. Can occur by hand materials and tools, etc. Being accidentally dropped through the gratings
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12. Gas Cutting The process consists of preheating the metal to be cut to its ignition (oxidation) temperature, i.e., above 870°C in case of steel. The preheating is done by oxy- acetylene gas flame, which is supplied from surrounding openings of the cutting torch. When this temperature is attained, a jet of high pressure oxygen
11. Fire Proofing by Spraying Many building codes require fireproofing protection to structural steel as a safety precaution. The most common way to provide such protection is by spraying low-density fiber or cementitious compounds, now called spray-applied fire-resistive material (SFRM). The product can be sprayed on steel to provide heat resistance and also can be
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10. Excavation Work Being a major part of the site preparation, excavation can make or break the stability of your future building. First things first. Do not commence any excavation work before you have a clear map of underground utilities: cables, pipes, etc. Mark the services and make sure everyone in the excavation team knows
09. Electrical Testing It is more likely that this will happen during electrical testing and fault finding, when conductors at dangerous voltages are often exposed. You can minimise this risk if testing is done while the equipment is isolated from any dangerous source of supply, although this is not always possible. Take care to prevent
08. Electrical Installation Electrical installations consist as the connection system that has the mission to conduct and distribute the electric current, from the electric service to the last electrical installation outlet, in a edification or construction. Electrical installation describes the physical work involved in installing electrical systems into a building and a plant., etc as
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07. Coring on Existing Drainage Sump. Constructing holes in precast concrete manhole sections for pipe connections can be achieved by several methods. Each requires careful consideration before making the investment in training and equipment. Whether you are building a new plant and trying to decide which production method to use or you have an existing
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06. Cable Pulling, Installation and Banding Cable pulling works involve an individual pulling sheathed cables through walls, trays and ducts for electrical power systems. They will push, pull, and band these cables through given spaces, as well as joining them together. ∴ 케이블 풀링, 설치 공사는 혼자하기 어려운 작업입니다. 한팀을 이루어 작업을 진행하고, 풀링할 때에 구호를 넣어 구호에 맞춰 케이블을 끌어당기고 고정하기도 합니다. 케이블을
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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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시작 인천공항에서 4시간 정도 비행기를 타고 가면…. 이렇게 강렬한 태양빛과 더운공기가 느껴지는 곳에 닿을 수 있다는 것!!! 어렸을 때부터 책 속에서 배우지만, 항상 신기하고 놀랍습니다. Mount Tapochau (타오차우 산) 산 정상까지는 차량을 이용해서 주차장에 닿을 수 있습니다. 주차장에서 정상까지는 5분도 안걸리는…. 바로 앞 입니다. 산 꼭대기까지 도로가 좋지 않다는 글을 본 적도 있는데… 그렇지 않습니다.
