1) Bolted bonnet 2) Flanged or butt-welded ends 3) Standards compliance 4) 6) End flange: ASME B16.5 7) Inspection and test: API 598, API 6D 8) NPS: 2"~48" 9) Pressure: class 150lbs~2,500lbs 10) Material: WCB, WCC, LCB, LCC, WC6, WC9, C5, C12, CF8, CF8M, CF3, CF8C, CN7M Packing: Plywooden case