Lightning and voltage surge protection assessment

TNEI was appointed to carry out a lightning structural protection assessment at the Chergui gas processing facility in Tunisia. The scope of work was to produce layout drawings for several sites showing positioning of all lightning protection equipment, example installation drawings and to produce marked up single line diagrams to show the location of all required surge protection devices. The existing lightning protection scheme at Chergui had been designed to BS 6651:1992, Code of Practice for Protection of Structures against Lightning, which does not require surge protection as mandatory.  The recommendations took into account the design requirements of the BS EN 62305:2006 standard which supersedes BS 6651 and explicitly requires surge protection.