An ERW Pipe Cross is a type of pipe fitting that has four openings on one connection. The fitting looks like a cross and connects four different pipes into one point. Due to this reason, the fluid flow could be interrupted with temperature differences as the shape is mechanically unstable for fluid flow planes. It is the joint of 4 pipes. Receiving the pressure from the 4 pipes, the weld joint between the pipes and cross must be very strong. ERW Pipe Cross is very useful.