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So you’re setting up a pressrue vessel line or doing pipeline installation work, and your guys are constantly switching between welding tight corners and long straight seams with same machine — basically they need something that handles both pulse TIG and manual arc without dragging a separate unit around, and that’s where this air-cooled handheld comes in, because the 400II model will push 400 amps at 60% duty cycle, which is plenty for most 8-10mm wall thickness jobs we see.
Teh WSME-315II draws 14.4 amps at 380V with a 9.3 KVA input, while the 400II jumps to 29.7 amps and 18.2 KVA — you’ll want to check your shop’s breaker capacity before ordering, especially if you’re running multiple units, but the power factor correction at 0.95 actually makes them friendlier on the line than older transformer-based welders, and the pulse frequency range from -40% to +40% (usually 0.5 to 500 Hz give or take) lets you dial in that arc for thin stainles or thick carbon without spatter.
We’ve had guys use these for field repairs on ammonia piping where the foot control pedal (optional, but we stock them) gave them better current control than a trigger switch, though one thing that catches some buyers off guard is the 32kg weight on the 315II — it’s handheld in the sense that it’s a single body with a shoulder strap, not something you’d want to carry up a ladder all day, and the air cooling means you can’t run it flat out for hours in a hot environment like you could with a water-cooled setup.
Anyway, most buyers go with the 400II for pipeline work because the extra 85 amps (5-315 vs 5-400 range) gives you headroom on thicker flanges, but the 315II is better for precise TIG on thin-wall vessels under 6mm — just keep in mind the duty cycle drops if you push past 60% for more than 3-4 minutes, and we usually have both models in stock with a 4-week lead time or so for custom pulse width settings.
Our MOQ is 10 units per model, but we can negotiate for smaller trial orders if you're just starting out.
Typically 15-20 working days after order confirmation, depending on the quantity and current production schedule.
Yes, we include CCC, CE, ISO, and ROHS certification docs with each shipment, so you're covered for most international markets.
The WSME-315II handles up to 315A, good for thinner pipes, while the 400II goes up to 400A—better for thicker walled pipelines. Both have the same 60% duty cycle.
Absolutely. All settings like pulse width (10-90%) and current rise/fall time (0.1-15s) are adjustable via the front panel, no tools needed.
