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AS80 Closed-Head Orbital Welding Head
Sealed-head TIG welding for 12.7-76.2 mm tube up to 3 mm wall. Dual argon shielding keeps the inside oxide-free - no purge rig, no grinding after.
What it welds
AS80 covers stainless tube and fittings from 12.7 to 76.2 mm OD, up to 3 mm wall. It runs autogenous - no filler wire - which is what sanitary and high-purity lines need: a smooth, crevice-free inner surface. Water-cooled head, 5 kg, so one operator can move it between joints all day without a crane.
Why closed head
A closed head seals the joint inside an argon chamber. Two shielding paths - one inside the tube, one around the torch - keep oxygen away from the weld pool from pre-flow to post-flow. The result is single-sided welding with double-sided formation: no colour inside, no sugaring, no oxide scale to grind out afterwards. On pharmaceutical and high-purity gas lines that is the difference between a weld that passes passivation and one that has to be cut out.
Technical parameters
Model | As80 |
Type | Closed-head orbital TIG weld head |
Tube OD range | 12.7 - 76.2 mm (1/2" - 3") |
Max wall thickness | 3mm |
Welding process | Autogenous (no filler) |
Shielding gas Argon | dual path (inner purge + torch) |
Pre-flow / post-flow | Programmable |
Torch rotation | 360 degrees |
Rotation speed | 0.2657~5.31 rpm |
Cooling | Water-cooled |
Compatible power source | AW200/AW400 |
Collet sizes | 1/2, 3/4, 1, 1/4, 11/2, 2, 21/2, 3 inch |
Cable assembly length | 9.5m |
Weld head weight | 5 kg (without cable) |
Package size / shipping weight | 750X410X290mm/ 17.8kg |
Certification | IS9001 and CE |
Typical applications
- Pharmaceutical & biotech - WFI, purified water and fermentation clean lines, on-site and prefabricated.
- Food & beverage - beer, dairy and juice process piping, filtration skids.
- Semiconductor - high-purity specialty gas and UPW lines.
- Data centre & new energy - liquid-cooling manifold piping, batch welded on a production line.
- Aerospace - small-diameter hydraulic and fuel lines.
Detail Shot
How to operate
- Check water, power and argon; clean and align the tube ends.
- Mount the collet insert for your OD and clamp the head on the joint.
- Insert the inner argon plug and start the purge.
- Load the program and close the chamber.
- Weld, then inspect the bead with a borescope.
What you get
Standard supply: weld head, one collet insert, 9.5 m cable assembly, water hose set, spare tungsten electrodes, inner argon plug, operation manual, carrying case.
Options: additional collet inserts, AW200 / AW400 power source, remote pendant, spare parts kit.
Delivery: standard configuration ships in 5 working days after receipt of deposit.
Try it on your own tube
Send two 150 mm samples of your actual tube and fitting. We weld them on AS80 and send back the coupons with a borescope video of the inner surface and the parameter report. Five working days, no charge.
