Pipe work lagging section manufacture - in which transverse rims are pressed into plate before bending into curved shape

摘要

The cylindrical or half cylindrical metal jackets for pipework lagging are made from sheet metal strip cut to lengths. The cut plates are perforated along longitudinal edge and ends are pressed to form joining end rims. The transverse rims (24) are pressed before the plate (12) is bent into curved shape. The plate is bent between a support (28) and working roller (30). The plate is held between rollers so that one edge (32) of the support roller contacts directly the transition between transverse rim (24) and flat part of plate.