Welding Neck Flange, Carbon Steel Flange, Pipe Flange manufacturer / supplier in China, offering High-Strength and Pressure-Resistant Carbon Steel High-Pressure Flange, a Forged and Welded Flange Specially Designed for Industrial Pipelines., High-Strength and Fatigue-Resistant Carbon Steel Flange Specially Designed for Wind Power Turbine Towers, Customizable Aluminum Flange for Versatile Plumbing and HVAC Solutions and so on.