Brazed plate heat exchanger of stainless steel with stainless steel brazing material

摘要

The present invention relates to a brazed plate heat exchanger made of stainless steel and having a burst pressure of at least 65 bar and comprising a heat exchange plate pack with plates having an area larger than 0.20m2 and a porthole area of at least 0.003m2, the brazing material being an iron-based brazing filler material comprising at least 40 wt% Fe, 14-21 wt% Cr, 5-21 wt% Ni, and either 6-15 wt% Si and 0.2-1.5 wt% B, or 4-9 wt% Si and 4-9 wt% P.