Pipe element for a heat exchanger and a heat exchanger with the pipe element

A heat exchanger which comprises a first header for supplying a liquid to be cooled, a second header for discharging the cooled liquid and a plurality of substantially horizontal pipe elements communicatively connected between said first and second headers in juxtaposition, each of said pipe elements comprising at least one bent portion and at least two linear portions connected to said bent portion, respective ones of said linear portions being connected to said first and second headers, wherein an angle formed by two adjacent ones of said linear portions is in a range of from about 30' to 3.degree. and wherein said linear portions are disposed in a plane inclined at an angle of 2.degree.-3.degree. with respect to a horizontal plane such that said linear portion connected to said first header is higher than said linear portion connected to said second header, whereby a cooling liquid will drain from said pipe elements to said second header.