These conical flanges are attach by welding the pipe to the neck of the flange. Conical flanges are used for applications where high pressure is a factor. The inside diameter of the flange is designed to match the pipe's inside diameter. It handled pressure range between 150 - 2500 LBS. We are also accept the drawing and specification of the customer and according to that we developed their products. Conical ( Weld-Neck )flanges are available in size range between 0.5" - 24" inches and material of the conical flanges are carbon steel & S.S.