EnerMech Ltd has stepped up its presence in the African oil and gas sector with the £3 million (43 million Rand) acquisition of heavy load testing company Water Weights International SA (Pty) Ltd. The mechanical engineering group will use Water Weights International’s (WWI) strategic relationships to accelerate growth of its main business lines in South Africa and in key East and West African countries. EnerMech will invest up to £20 million (284 million Rand) in its African operations over the next three years and expects its workforce to grow to 250 in the same period.