Features: 1) Bonnet designs: a) Bolted bonnet, Class 150-1500 b) Pressure seal bonnet: Class 600-2500LB 2) End connection: butt welded and flanged 3) Standards compliance a) Design and manufacture: ANSI B16.34, BS1873 b) Face to face (end to end): ANSI B16.10 c) Flanged connection: ANSI B16.5 d) Test and inspection: API598 e) Butt welded end: ANSI B16.25