The Pipeliner II System (shown below welding on 30" pipe) is designed to produce high quality circumferential butt welds on pipe 6" and larger. The Torch oscillation or "weave" motion duplicates the precise motion of a skilled manual welder. Linear oscillation (where the torch is moved across the joint perpendicular to the pipe surface) is generally used. A new option allows the oscillation motion to be pendular, with the torch pivoting on a center axis, like a clock's pendulum. This offers advantages for applications such as fillet welds, ensuring symmetrical welds with equal legs and smooth transitions to the base material. Welds on heavy wall pipe benefit from the pendular motion, which directs the pulsed stream of metal droplets directly at the bevel sidewalls helping to assure proper sidewall fusion.

The Pipeliner System was recently used to replace the steam Headers at a power plant in Pennsylvania. The Headers are the large diameter pipes which collect the steam from the individual heating assemblies (superheaters, reheaters, etc.). The job required welding 24" OD headers fabricated of 2.25% Cr, 1% Mo alloy steel (P5). The wall thickness was 4.0" and a compound bevel was used (38.5 degree for 0.75", 10 degree for the balance) and was preheated throughout the welding period. The contractor used pendular oscillation and an all-position flux core electrode. All welds were radiographed and met the criteria of ASME Section I and V (Boiler and Pressure Vessel Code) with no repairs required.

Further information can be obtained from:

Magnatech
- Addr: P.O. Box 260 6 Kripes Rd. East Granby, CT 06026, CT, USA
- Tel: (860) 653-2573
- Fax: (860) 653-0486
- WWW: http://www.Magnatech-lp.com
- Email.
- Contact: John Emmerson