Size: NPS1/4â-8â Rating: Class150-2500 LB Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Steel End: SW, BW, RF, RTJ, NPT, BSP, Special Operation: Manual, Gear, Pneumatic, Electric Design & Manufacture Standard: API6D, ASME16.34, BS5351 Face to Face: ASME B16.10, API6D End Connection: ASME B16.5, ASME B16.25 Test Standard: API6D, API598 Full port or reduced port Fire safe certified Blowout-proof stem Anti-static Low emission control Optional locking device ISO 5211 top flange