**British Standard:**   - Size Range: 2”–24” (DN50–DN600)   - Design Standards: BS5163-1, BS5163-2, EN 558-1   - Connection Standard: EN 1092-2   - Working Pressure: PN10, PN16, PN25   **American Standard:**   - Size Range: 2”–24” (DN50–DN600)   - Design Standards: AWWA C515, ASME B16.10   - Connection Standards: ASME B16.1 (CL125), ASME B16.42 (CL150)   - Working Pressure: 363PSI, 300PSI, 250PSI, 200PSI   **German Standard:**   - Size Range: 1½”–24” (DN40–DN600)   - Design Standards: BS5163-1, BS5163-2, EN 558-1 (Face-to-Face Dimensions, Series 3)   - Connection Standards: BS EN 1092-2, BS 10 Table D/E   - Working Pressure: PN10, PN16, PN25   **Chinese National Standard:**   - Size Range: DN50–DN1000   - Design Standards: CJ/T 216, GB/T 12221, GB 5135.6   - Connection Standard: GB/T 17241.6   - Working Pressure: PN10, PN16, PN25   **Application Scope:** Fire protection, water utilities.