A project in Perth using six-inch BISEP line stop technology. STATS Group’s patented branch installed self-energised plug (BISEP®) technology represents a significant advancement in line stopping. “This upgrade from conventional lip seal line stop equipment means repairs can be completed without disrupting production, with fewer onsite operations and enhanced safety,” he said. “The BISEP is the only line stop technology compliant with IMCA D044, guidelines for isolation and intervention in subsea systems, specifically for diver access,” Campbell said. “At 70m water depth, a leak-tight midline isolation enabled a critical platform to be connected to an existing high pressure gas pipeline.