Polycar 60 / 60 PLC welding carriage for thick-wall pipes from Ø168 mm, including narrow-gap welding

Polycar 60 / 60 PLC welding carriage for thick-wall pipes from Ø168 mm, including narrow-gap welding

Country: · Model: Polycar 60 / 60 PLC

Polycar 60 are open carriages for orbital multi-pass TIG welding of pipes from Ø168 mm with cold or hot filler wire. The standard Polycar 60-2 takes walls up to 75 mm, and Polycar 60 PLC welds a narrow groove up to 100 mm. PLC is made for critical thick-wall pipelines, primarily the primary circuit of nuclear power plants.

Pipe outside diameter: from 168 mm
Wall thickness: up to 75 mm (Polycar 60-2), up to 100 mm (Polycar 60 PLC, narrow groove)
Processes: TIG with cold and hot wire, AVC, OSC
Welding current: up to 300 A

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Technical specifications

Pipe outside diameter	from 168 mm
Wall thickness	up to 75 mm (Polycar 60-2), up to 100 mm (Polycar 60 PLC, narrow groove)
Processes	TIG with cold and hot wire, AVC, OSC
Welding current	up to 300 A
Welding speed	20–400 mm/min (60-2), up to 1500 mm/min (60 PLC)
Wire feed	built-in, 5 kg spool
Weight	9–12 kg

Specifications are taken from the manufacturer’s technical documentation. Updated 11/06/2026.

Description

The carriage travels around the pipe along a guide ring and repeats the movements of the welder, making the weld in a series of passes. The torch unit has cross slides AVC/OSC, that is, motorized arc voltage control and oscillation. Speed is held by a closed loop, an encoder runs the program by position, and the torch with a ceramic nozzle and a gas lens gives laminar shielding. The built-in feed mechanism with a straightener takes spools of 1.5 or 5 kg. Polycar 60-2 tilts the torch by ±15° for socket joints, and the "V2 Narrow Gap" module welds a narrow groove up to 75 mm. The current is up to 300 A, the electrode 2.4/3.2/4.0 mm, the wire 0.8 mm, the welding speed 20–400 mm/min, and the weight 9 kg. The AVC stroke is 60 mm (LP 30 mm), OSC 60 mm, the AVC axis speed is 10–500 mm/min, and OSC 20–1000 mm/min. Wire feed is 95–2068 mm/min (CW), 360–7929 mm/min (HW), 95–2408 mm/min (LP).

How to choose

The minimum radial clearance is 167 mm, or 190 mm with offset. The low-profile LP has 135 mm and 146 mm, so LP is taken in tight places. For a narrow groove up to 100 mm deep, Polycar 60 PLC is needed, with a narrow-gap torch, a travel speed of up to 1500 mm/min, an AVC/OSC stroke of 60 mm, a manual slide (axial stroke 30 mm, radial 85 mm) and a Polyfil 4800 HW mechanism up to 4800 mm/min with a 5 kg spool. The cable is 15 m and the weight is 12 kg. The carriages are powered by P6/P6 HW for 300–520 A and the PC series for 300–550 A.