Welding Neck Flange, Carbon Steel Flange, Pipe Flange manufacturer / supplier in China, offering A105 16mn High Quality Precision Machined Carbon Steel Buttwelding Flange, Premium Quality Stainless Steel Blind Flange for Industrial Use, High-Strength and Pressure-Resistant Carbon Steel High-Pressure Flange, a Forged and Welded Flange Specially Designed for Industrial Pipelines. and so on.