Aircraft tube and duct assemblies are important parts of the aircraft fluid lines. Aircraft tube and duct assemblies provide fluid conveyance solutions for systems in the aircraft. Various types of materials are utilized for the manufacturing of tube and ducts, which include copper, aluminium alloy, steel, titanium, etc. Earlier, copper tubing was extensively utilized in the aviation fluid applications but nowadays in modern aircrafts, aluminium alloy, nickel alloy and corrosion resistant steel or titanium tubes have replaced copper tubing. Aircraft tube and duct assemblies are designed in such a way that they can withstand high water and air pressure, extreme hot and cold temperatures and corrosive chemicals.