Orbital Pipe Welding Systems

Orbital pipe welding systems mechanize TIG welding by rotating the arc around a fixed tube or pipe under a stored program, so every joint is welded with the same parameters. Seven Star LLC supplies orbital welding equipment in Oman from Orbitalum and Polysoude. The listing includes orbital welding power sources, closed weld heads for small tube, open weld heads, tube-to-tubesheet weld heads and a rotary device for welding parts that can be turned.

Power sources, closed heads, open heads and tube-to-tubesheet heads

The power source holds the weld program. It divides the joint into sectors and adjusts current, pulse, travel speed and, where fitted, wire feed in each sector to cope with the changing effect of gravity. Closed chamber heads surround the joint with shielding gas and make autogenous fusion welds on thin-wall tube, the method used for high-purity gas lines, pharmaceutical tubing and instrument tubing. Open heads carry a visible torch and cold wire feed for thicker pipe and multi-pass welds. Tube-to-tubesheet heads locate in the tube bore to weld heat exchanger and boiler tube ends.

Where orbital welding is used

Typical applications are instrument and sample tubing, semiconductor and pharmaceutical process lines, heat exchanger fabrication, and stainless or duplex small-bore piping in desalination, oil and gas plants across the GCC. Most systems can log or print the weld data for each joint, which supports the traceability these projects ask for. Results depend on end preparation, so the tube must be cut square and faced before welding.

What to send for an orbital welding quotation

Send the outside diameter range, wall thickness, material grade, joint type (tube to tube, tube to fitting, tube to tubesheet), whether filler wire is needed, the clearance around the joint, the supply voltage, and the welding standard or purity specification you work to. Weld head choice depends on these figures, and we check them against the manufacturer documentation.