Forged Steel Top Entry Ball Valve Design Specifications: Size: from NPS 1/2 to NPS 4 Inch. Class: from ASME 150 to ASME 2500LB. Design: API 6D, API 608, ASME B16.34, DIN 3357. Wall Thickness: ASME B16.34. Pressure-temperature Rating: ASME B16.34. Face-to-face Dimensions for Flanged Valves: ASME B16.10-API 6D. Flange Design: ASME B16.5. Socket Weld Ends to ASME B16.11. Screwed Ends (NPT) to ASME B1.20.1- ASME B16.11. Butt Welding Ends: ASME B16.25 Pressure Testing: API 598 Body Material: A105, A182 F304, A182 F304L, A182 F316, A182 F316L, A352 LF2, A352 F11, A352 F22, A352 F5, A352 F51, A352 F321. Quality Assurance (QA): Every step from procurement through production, welding, assembly, testing, and packaging is in accordance with quality programs and procedures (ASME Section III manual and ISO 9001 manual). Manufacturer: China Yaao Forged Valve Co., Ltd