... D820mm 4, Pipe fitting made of steel plate from D630mm to D3320mm 5, Socket welding pipe fittings from D3mm to D159mm ... medium and low voltage models of various specifications of carbon steel, stainless steel, alloy steel material of the flange, elbow, pipe bend, pipe reducer ... German TUV certification, and British classification societies certification. HOT SALE!! Stainless Steel Welding Plate Flange