TIG welding equipment options to specify

What a TIG quotation still has to confirm

For tig welding equipment, write base metal and thickness in mm, DC or AC output, amperage range, duty cycle at a stated current, input voltage in V with Hz and phase, tungsten diameter, shielding gas, and whether a cooler or foot pedal is included. A 200 A, 40% duty cycle figure at 40 °C under a 10-minute IEC 60974-1 cycle is not interchangeable with a 150 A, 60% note taken at 25 °C. Ingress protection, noise level, and working envelope of the torch lead stay on the document request.

Headline rating versus stated test basis matters here because TIG screens often start from a single ampere number. Use that number only to group questions. Comparison needs the test basis, the control interface, and the spare parts list for collets and cups. Standard air-cooled packages can be simpler to document. An application-specific water-cooled or AC/DC package may be required for aluminum or long arc-on time, and that choice is a specification deviation until the supplier writes it.

Lowest machine price versus comparable delivered scope also applies. Gas lenses, regulators, and freight can sit outside the unit price. State incoterm, quantity, and the US destination before ranking offers. This desk does not confirm compatibility with your panel, does not hold UL or ISO certificates, and does not publish a delivery date. A factory acceptance test, if you need one, is requested against the exact proposed model.

Worked example: a pipe spool bench in 2026 wants AC/DC TIG for 1.5 mm to 6 mm stainless and aluminum, indoor, single-phase 230 V. The process step is to freeze gas, tungsten, and duty cycle before search. The result is an open RFQ, not a selected factory. Continue with MIG scope checks if the cell also uses wire, or the stick checklist when electrodes remain in the same bay. The procurement note lists the evidence columns.