Heat exchanger to take over the size according to the medium flow rate, flow velocity, etc., for gas,it will be more strict, because gas entering into the shell side is easy to cause vibration, there is a need to adjust the over size to control the flow rate.
The length of the takeover is mainly determined by the installation dimension and space of the connection equipment of the heat exchanger.
In the market, we should focus on the common specifications of floating-head heat exchanger and condenser, fixed tube plate heat exchanger, u-tube heat exchanger, etc.
Specification of stainless steel heat exchanger tube:
Material name: outer diameter x wall thickness.
seamless tube：10.0～88.9 x 1.0～6.0mm
welded tube：12.7～76.2 x 0.5～3.05mm
The main production standards of heat exchanger tubes are as follows:
ASME SA213/SA213M《The boiler, superheater and heat exchanger are made of seamless ferrite and austenitic alloy steel tubes.》
ASME SA688/SA688M 《The feed water heater is welded with austenitic stainless steel tube.》
ASME SA789/SA789M《Generally used for seamless and welded ferrite/austenitic stainless steel tubes.》
ASME SA249/SA249M《Boiler, superheater, heat exchanger and condenser with welded austenitic steel tube.》
GB13296-91《Stainless steel seamless tube for boiler and heat exchanger.》
In practical application, the heat exchanger often needs non-standard design, and the length of heat exchanger tube is not up to standard.