Black Flag, Cold as Life and E Town Concrete will headline the This Is Hardcore festival in Philadelphia this summer. Bayway, Creeping Death and Outta Pocket were also announced as part of the lineup in a social media post on Monday, April 15 alongside Sunami, Palehorse and Wisdom in Chains. The three day event will take place at two different venues between Aug. 2 and 4. The Friday show will happen at Underground Arts while the Saturday and Sunday events are scheduled for the Franklin Music Hall. Tickets will be available for purchase on Friday, April 19. This Is Hardcore was first held in 20…