Studded Tube, Studded Pipe, Nailhead

What is studded pipe?

Studded Pipe also called studded tubes, Nailhead Pipe or stud Pipe. Studded pipes are used as an alternative to finned tubes in heat exchangers mainly in the petrochemical industry where the surface is exposed to particular corrosion and aggression by gasses and vapors. Studded fin tube is a standard frequency electric-resistance-welded studded type surface. Studded pipe normally weld round carbon steed studs on carbon, alloy or stainless steel tubes with diameters from 1.5″ to 12.75″.

How to produce studded pipe?

Studded pipe is made by electrical resistance stud welding equipment, which specially formed Studs in rows around the tube. The Studs can be supplied in a variety of sizes and shapes. The pattern in which the studs are arranged on the tube can also be varied by changing the Number of studs per row around the tube, the spacing between the rows, and whether the studs in adjacent Rows are offset. It is also possible to apply studs to just one side of the Tube, or to apply several different Height studs in the same row. The studs are hand loaded into the electrodes and then automatically welded. The welding process allows for the combination of any stud and tube grade, including carbon, alloy, stainless steels, and high nickel alloys. After studding, alloy steel pipes are stress-relieved in accordance with the relevant specifications for the steel class

Studded pipe advantages:

Because of their relatively thicker Cross-section as compared to fins, Studded pipe is one of the mechanically Strongest extended-surfaces Available. Although strength may not be a consideration for heat Transfer performance, it may be important when the application requires the extended surface to carry the weight of the tube at supports, or where severe mechanical abuse is expected in service or during cleaning.

Studded pipe usages:

The mainly applications for studded tubes is the process heat recovery of the petrochemical industry, in areas of convection ovens, vacuum generators for chemical processing, specially used in petroleum applications. Studded pipes high resistance in the harsh environments, such as sections of Sulfuric Acid atmospheres, makes it very useful for the industries mentioned.

Studded pipe size and material:

Stud Material: Carbon steel ASTM A510 grade 1005 to 1010. Alloy steels normally used in steel studs.

ASTM A193 Grade: B6, B6X, B8, B8a, B8M, B8C, etc. AISI 304, 316, 410, 347, 321

The studs are arranged in staggered rows (rings).

All tubes and studs material combination can be manufactured: Carbon, stainless, and alloy steels.

We can produce a large number of steel tube/stud combinations, including Carbon steel, Stainless steel and other steel alloys.

Stud tubes combinations comprised of different Carbon steel must receive heat treatment. We accomplish this on site, with our PWHT furnace