Applicable Standards 1. Design Rating: API 600,API 603,ASME B16.34 2. Face to face: ASME B16.10 3. Flanged ends: ASME B16.5 4. Butt welding ends: ASME B16.34 5. Inspection & testing: API 598 Material: WCB/Trim 1,WCB/Trim 5,WCB/Trim 8,CF8/304,CF8M/316 Size: 2~56