tailieunhanh - Lesson16- Ship Systems (1)

Tham khảo tài liệu 'lesson16- ship systems (1)', ngoại ngữ, anh văn thương mại phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Lesson16- Ship Systems 1 A city on land is in want of the perfect and effective service i. e. different public systems. Similarly a large ship is quite a little floating town also requiring various ship systems that can cater for the needs of passengers and crew with the necessary conditions for their work and life and what is more important ensure the performance and safety of the ship. 1. The Fire-fighting System Due to the short circuit of a loop poor insulation of a conductor accumulation of oil mist welding procedure or painting process a serious fire hazard will occur at any time and result in a tragic accident especially with an oil tanker. Thus to extinguish the possible fire we have to set up a fire fighting system which is sometimes called Fi-Fi system. As you know the three fundamental conditions for catching fire are high temperature sufficient air and combustible substance. No doubt that it is impossible for us to alter the combustibility of a substance. What we can do is abolish or change the exterior conditions of combustion by either reducing the temperature or isolating the ambient air. In respect of the fire-fighting system there exist a few different types. First the water fire-fighting system that is mostly applied to deck platform superstructure and weather posts. Secondly the steam fire-fighting system that is generally taken for an oil tanker to put out the fire by reducing the oxygen content in the air through spraying saturated steam into the flame. Thirdly the CO2 or inert gas fire-fighting system that is widely used in enclosed compartments to extinguish the fire caused by oil or electricity. Fourthly the foam fire-fighting system that has found a wide application as well mainly by isolating the ambient air. Last of all the halogen fire-fighting system has been used in recent years one of which is 1301 system. This system can stop a chain reaction of combustion which possesses a series of advantages but now has been banned as required of