Why we required to attend steam leakage in power plant running boiler? / Leakage attending in power plant 1.If in running boiler any tube has leakage, it will increase day by day due to steam velocity friction on the edge of the hole of leakage and it will cause earlier shutdown of the boiler. 2. …Read more
Advances in rolling process for ferrous and non-ferrous metals The rolling process are the group of the most efficient production technologies and can be in general classified as rolling of long and flat products or forge rolling of shaped components. In the recent times, technological achievements in this field are related mostly to end product …Read more
Water Jet Cutting Water jet cutting/machining is a non-traditional machining process based on mechanical energy for cutting and processing metal and non-metal materials. Including the use of high-speed water jets to smoothly cut soft workpieces. Fine abrasive grains are used in combination with water to cut metal materials. In waterjet machining, a high-speed water jet …Read more
Why do we use trevi test? Trevi test is use for set pressure of safety valve with online while safety valve in service without adding pressure in whole system approaching the set pressure. Trevi test kit use the Hydraulic lift assist device to help pull spindle of safety valve to overcome spring force without increasing …Read more
Introduction to stress strain curve Stress Strain diagram is an important graphical measure of material’s mechanical properties. It can be obtained from tensile testing of material in the Universal Testing Machine following standards below, e.g. ASTM E8 or IS 1608 for metals, ASTM D638 for plastics and ASTM D3039 for composites. Stress is internal …Read more
Friction Stir Welding According to AWS, “Friction stir welding (FSW) is a ‘solid state forge welding process’, is a type of friction welding which makes a weld joint between two workpieces by the heating and plastic material displacement caused by a rapidly rotating tool that traverses the weld joint”. In Friction stir welding, no filler …Read more
History of Cold Spraying / gas dynamic cold spray The cold spray process or gas dynamic cold spray method was developed in 1980s by Russian scientists researching gas dynamics in Siberia. Although this process was not widely known outside Russia until the 1990s, cold spraying continues to be studied in research laboratories around the world …Read more
Here are some Questions and Answers on high pressure boilers MCQs
What is the difference between CVD and PVD? which one is better? Description CVD PVD Source material state Gas precursor solid Process Chemical reaction in gaseous phase, importance of fluid dynamics Evaporation and collision impact on the solid target Temperatures Higher, appx 600-1100 ˚C Lower, appx below 450 ˚C Layers Coating thickness Multi layer possible …Read more
This article contains CVD Process introduction, principle, variants, variables, advantages, applications Introduction to CVD Process Chemical vapor deposition (CVD) is a family of processes whereby a solid material is deposited from a vapor by a chemical reaction occurring on or in the vicinity of a substrate surface. The resulting solid material is in the form …Read more