Here in Erbil, we have the best flanges, Socket Weld Pipe Flanges. Socket-weld pipe flanges are typically used on smaller sizes of high pressure pipes. These pipe flanges are attached by inserting the pipe into the socket end and applying fillet weld around the top. … Socket Weld pipe flanges are typically provided with a raised face, flat face, or RTJ facing. and we get them by our selves from other countries. with different sizes and kinds.