The fully welded plate heat exchanger (AWVP) incorporates the advantages of high efficiency and compactness from detachable plate heat exchangers, while addressing the shortcomings of shell-and-tube heat exchangers, such as low heat exchange efficiency and large footprint. The heat transfer plates of AMAX fully welded plate heat exchangers feature various forms of corrugation. Depending on the working conditions, they offer the optimal match between heat transfer performance and pressure drop characteristics.