The blend header is a common point where the components of a blending system flow concurrently. In other words, passages of various blending components are connected to the main channel along its length, the endpoint of which is called a blend header. The final product flows from one end of the pipe to the other end and then flows to a product tank. The efficient blending system involves the automation of field equipment, online analyzers, computer software and hardware, interfaces, and distributed control systems (DCS). The prime objective of this topic is to outline the blend header design parameters that are indispensable to consider while designing it.