Standards Design and Manufacture: API 600 (ISO 10434)or API 6D. Inspection and Test: API 598, API 600 or API 6D. End flange dimension: ASME B16.5(for NPS<=24); ASME B16.47 series B, API 605 or ASME B16.47 series A, MSS SP-44(for NPS>24). BW end dimension: ASME B16.25. Socket-weld dimension: ASME B16.11. Face to face and end to end: ASME B16.10. Pressure-temperature ratings: ASME B16.34. Parts and material list Note: The chart above only lists out some common composition of steel gate valve parts. We may provide other different parts material composition according to the customer's request or the actual valve working condition. Class 150 & JIS 10K Cast Steel Gate Valve Class 300 & JIS 20K Cast Steel Gate Valve Class 600 & Class 900 Cast Steel Gate Valve Class 1500 & Class 2500 Cast Steel Gate Valve