Because the shape is more complicated, because the design is usually with bars of different panels and partitions, specifically applied to heat exchanger gaskets, sealing the main multi-purpose
winding type, metal-coated type, tooth type of gasket, sealing ribs times main types of metal-coated and metal - non-metallic type to enhance the composition of a variety of gasket materials to
choose from to ensure that fluctuations in temperature and pressure conditions to maintain the absolute integrity of the seal; can provide any structural form with a ribs of the gasket.
Specifically applied to heat exchanger gaskets