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              1. About US

                flanges



                outer diameter
                D(mm)
                inner diameter d(mm)
                rim height H(mm)
                materia
                executive standard
                use
                850-2200
                750-2000
                80-250
                20#、16Mn、Q345,etc
                industry standards such as NB/T47008-2010, YB4068-91, GB/T 30895-2014 and technical agreements, , manufacturer standards and technical requirements raised by the customer slewing bearing, port machinery, petroleum chemistry and ship building etc


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