api5000API Stands for American Petroleum Institute. API Socket Weld Flanges are manufactured to provide hh strength and robustness. These flanges are made for hh heat purposes. Theseclass API 5000 API 10000 API 15000 AA, BB, CC PSL 1 PSL 2 PSL 2 DD, EE, FF PSL 1 PSL 2 PSL 3 HH PSL 3 PSL 3 PSL 3 Our extensive experience in manufac-turing valves for wellhead