Design Standard: API 6D, ASME B 16.34 Structural length: Flanged ends: API 6D ASME B16.10 Welded connection: API 6D ASME B16.10 Flanged endsr: ASME B 16.5 Butt-welding ends: ASME B 16.25 Test & inspection: API 6D, API598 Main size of outside: DN15~200 PN150~600 Worm gear driving, Air-operationg and Fluid driving, Electric driving