Patrick Horgan, an employee of a company that was subcontracted to BBCLG to install a 400 mm gas pipeline from Birdhill to Nenagh in County Tipperary, sustained fatal injuries when the pipeline ruptured during test pressure.
The company had previously admitted breaching s 12 of the Safety, Health and Welfare at Work Act 2005 for failing to ensure that safety measures or precautions were in place to protect workers from the dangers caused by piping that had been pressurised for testing.
The fine was imposed last week by Nenagh District Court.
BBCLG, a joint venture between Balfour Beatty and CLG Developments, provides response, maintenance and construction services to Gas Networks Ireland. It was established in 2011 and employs about 330 people.