Insert for placement in a vessel and method of forming the insert

摘要: A method of making an insert comprising elongate core having a plurality loops disposed longitudinally therealong and angularly thereabout by taking such wherein portion each loop lies in close proximity to first conceptual enveloping surface deforming the or displacing so as be inclined longitudinal axis that greater proportion periphery is second smaller cross-section than said surface. Also disclosed are inserts made above way vessels incorporating inserts.