BOA Group products

Edge welded bellows & formed bellows; We offer two different kinds of metal bellows: Edge welded bellows and Formed bellows. The basic element for formed bellows, a thin-walled cylindrical tube, is formed into corrugations using hydraulic or mechanical pressure. Different procedures and corrugation geometry are adopted depending on the production quantity and application. Edge welded bellows are manufactured with individual metal diaphragms that are welded together.

According to their physical properties, most metals expand with increasing temperatures and contract with decreasing temperatures. In pipeline systems, this phenomenon causes a variation in the length of the individual sections of the pipeline. As pipelines are normally anchored at least on two connection points, any variation in length will result in thermal strain in the material and enhanced forces and moments at these terminal points. As far as possible, one will utilize the inherent flexibility of a pipeline to compensate for the pipe expansion (natural compensation). Should the expansion, however, exceed the inherent flexibility of the pipe, expansion joints are necessary to compensate these movements.

The EnduroFlex is a highly flexible metal hose designed to fit all common exhaust system pipe diameters.

EGR pipes ensure the transportation of hot exhaust gas back from the exhaust line to the intake airflow and do so in the high-pressure stream as well as the low-pressure one.