LONDON (Reuters) - A new grade of Angolan crude oil, operated by Italy's Eni, is set to come to market in January, sources familiar with operations in the country said on Friday. The Sangos crude oil grade will initially load one or two cargoes per month, two sources familiar with oil exports said on Friday. This would make daily exports at around 30-60,000 barrels per day (bpd), out of a total of around 1.7 million bpd. Operator Eni did not respond immediately to a request for comment. One source said there should be one cargo for loading in January and a second in late January or early February, while a second source said there would be two cargoes in January, but this had yet to be confirmed. Eni issued a statement in July saying it planned to get the 15/06 oil block, which includes the Sangos field, operational by the end of 2014.