High Vacuum Column Bechel

Fabrication and weld overlay of pipeline of high vacuum column.

Base material: SA 516 Gr 70 / SA 106 /SA 105

Weld overlay material:ER309LMo+317L

Buttering ER NiCr3

In the gallery we can see:

Weld overlay of nozzle in parts before butt weld. There are non accessible zones, where weld overlay cannot be made. These zones are made by a buttering with ALLOY 82. and later they are welded with ALLOY 82.

General view of 36” pipe weld overlay and 16” grafts, inside weld overlaid with automatic GTAW process. 3000 kg of welding materials used.

Butt weld of buttering in T of 16” and pipe butt welding made with automatic GTAW (orbital)

Butt weld of buttering in T of 16”. Welding position 2G (orbital welding)