ABB's Chief Executive Bjorn Rosengren is "very comfortable" about doubling the engineering group's full year sales growth outlook after its strong start to the year, he said on Tuesday.

"We have been very strong from the beginning and through the quarter in most of our segments," Rosengren told reporters after the Swiss engineering and technology company reported its first quarter earnings.

"We have increased our order book significantly during this quarter as we continue to see a strong market," he said.

(Reporting by John Revill; Editing by Kirsten Donovan)