api5000We are a API 6A flange manufacturer,API 6A Type 6B 5000 psi(34.5 MPa) Weld Neck RTJ Flange,API 6 B 3000 psi WN RTJ Flange,API 6BX 10000 PSI Weld Neck Flange,API weldAPI 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. These