Manufacture of Studded Tubes

Abstract

Studded tubes are nowadays often utilized in the manufacture of power generating and processing equipment. They are actually the steel tubes with a large number of iron studs welded onto their external surface. The studding increases the surface of tubes over which the heat is transferred so that consequently the equipment fitted with studded tubes is of smaller and lighter design. This becomes particularly significant in case of ship boilers. This equipment must be of smaller and lighter design, so that more space is left for useful cargo. In the past the finned tubes were used instead of ordinary tubes in the process of manufacture of ship boilers. Originally fins had been wound round the tubes and subsequently welded onto the tube structure. Nowadays the ship boilers are for the most part fitted with the studded tubes with studs closely packed together. The stud diameter is 5-8 mm while the distance between the studs is 11-15 mm in radial and axial direction.