Stainless Steel Studded Tube For Air Cooler

Description

These are metal tubes（Welded Stainless Tube） with studs welded on the OD throughout the length in a specific pattern, and used in fired heaters in refineries and also in water tube boilers.

Applications:

High density crude oil is passed through Studded Tube（Stainless Steel Welded Tube） which are heated from outside. Liquefied product comes out from the other end, which now can be used for further processing.

At times, navy boilers also require studded tubes, with oval shaped studs welded on them. These are used for heating water in water tube boilers.

Advantages

To increase the surface area of the tube and to protect tube surface from direct exposure to heat corrosive environment

Studding reduces the amount of bare pipes（Black Welded Pipe） used in these processes. Heat transfer surface of one studded pipe is equivalent to surface of 4 to 10 bare pipes（Weld Galvanized Pipe）.

Use of studded tubes is ideal for processes / applications, where dirty fuels are used in harsh environments

The steel studs are automatically resistance welded to the tube, producing high quality forge welds. The welding process enables the combination of any grades for studs and tube: carbon, low alloy, stainless steels and high nickel alloys. Alloy steel pipes are stress-relieved after studding,  according to the relevant specifications for the class and grade of steel used.

Because of their relative easy of cleaning, studded tubes or nail head pipes are used in furnaces and fired heaters as an alternative to high frequency welded finned tubes wherever the process application is such that heavy fouling of the external surface may occur.

The studs are attached to the pipe in diametrically opposing pairs around the circumference by electrical resistance welding to ensure a high integrity bond for strength and heat flow. Stud diameter, height and pitch can be specified on an individual basis.