Solid cylindrical studs resistance-welded to the tube in a full-penetration metallurgical bond — built to survive the aggressive fouling, corrosive gas streams, and frequent mechanical cleaning that damage finned tube.
Studded tube is manufactured using automated electrical resistance stud welding, producing full-penetration, metallurgically sound forge welds between each stud and the tube wall. Studs can be placed uniformly around the full circumference or restricted to one side, and stud height can be varied within the same row to tailor the heat transfer profile to the application.
Where finned tube is sensitive to mechanical damage, studded tube is specifically chosen for environments with highly corrosive, heavy-fouling gas or liquid streams that require frequent or aggressive cleaning — including hydroblasting and shot cleaning. Studs increase effective external surface area equivalent to 4 to 10 bare tubes, while disrupting the gas-side boundary layer to enhance the film heat transfer coefficient.
An automated resistance stud welding process built for heavy-duty, corrosive service.
Tube surface and stud stock are prepared to the weld procedure specification.
Studs are positioned uniformly around the tube circumference, or to one side, per the design.
Electrical resistance current fuses each stud to the tube wall in a full-penetration forge weld.
PWHT is applied to alloy steel grades in accordance with the governing material specification.
Weld integrity, stud height, and stud placement are verified against specification.
Automated stud-welding hardware built for full-penetration, code-compliant welds.
Produces full-penetration, metallurgically sound forge welds for each stud.
Positions studs uniformly or to one side per the design pattern.
Prepares tube surface and dimensions ahead of stud welding.
Applies PWHT to alloy steel grades per material specification.
Verifies full-penetration weld quality on sample studs from every run.
Confirms stud height, spacing, and placement against specification.
Studded tube absorbs particle impact and extends service life in fluidized bed boilers.
Withstands aggressive hydroblasting and shot cleaning in ethylene cracker and crude heater service.
The preferred extended-surface option where dirty gas streams rule out standard finned tube.