Norcem Brevik is a cement factory located at Brevik in Porsgrunn, Norway. Established as Dalen Portland Cementfabrikk in 1916, production commenced in 1919. The plant merged with Christiania Portland Cementfabrikk and Nordland Portland Cementfabrikk in 1968 to establish Norcem, which is now part of HeidelbergCement. The facility has an annual output of 1.2 million tonnes.