Material
of Construction
Various material of construction used in plant
have to withstand high temperature, pressure
and other processing conditions. Final
choice of material cannot be made merely by choosing a suitable material having the requisite mechanical behaviour
and anticorrosive properties, but must be based on a sound economic
analysis of competing materials. Many
factors enter into economic consideration. A high material cost may be accompanied by easier fabrication. With significant
saving in labour or it may be accompanied by easier fabrication. With significant saving in labour or it may be accompanied by long life owning to a property such as
corrosion resistance so that the
annual cost of replacement would be considerably lower.
Sometimes
a material must be selected even though it has inferior properties because right type material is too expensive or not available.
Product
contamination and process safety also influence the choice of material. Carbon
steel has a good strength and ductility. It can be easily
rolled, forged and drawn. Fabrication by
welding and lachining is also easily carried
out. So carbon steel can be considered Dr
use in majority of equipments in this process. Where high corrosion distance is required, stainless steel is
preferred.
Generally following
procedure is followed during selection 'materials.
No comments:
Post a Comment