Floating-head heat exchanger, kettle-type reboiler (floating-head tube bundle) pressure test sequence:
a) Test pressure ring and floating head special pressure test tool for the head test pressure, the kettle type reboiler should be equipped with a special shell for head test pressure;
b) Pipe test pressure;
c) Shell test pressure.
When the shell test pressure is equal to or higher than the test pressure of the tube process, the shell process should be first test pressure, after the test pressure of the tube process, and finally the shell process for test pressure.
① shell process test pressure: remove the tube box, outer head cover and floating head cover, install the test pressure ring at both ends, pressurize the shell process, check the connection parts of the shell and heat exchanger tube and tube plate.
②Tube-process test pressure: remove the test pressure ring, install the tube box and floating head cover, pressurize the tube process, check the seal at the flange of the tube box and the flange of the floating head cover and related parts.
③ Shell process test pressure: install the outer head cover, pressurize the shell process, check the pipe box flange seal and the outer head cover flange seal and related parts.
When the test pressure of the pipe process is higher than the test pressure of the shell process, the test pressure of the pipe bundle will be carried out first, then the test pressure of the pipe process, and finally the test pressure of the shell process.
①Pipe bundle test pressure: pull out the pipe bundle, install the test pressure ring, pipe box and floating head cover, pressurize the pipe bundle, check the heat exchanger tube and pipe plate joint parts and floating head cover flange seal and other relevant parts.
②Tube-process pressure test: install the tube bundle into the shell, install the tube box and floating head, pressurize the tube bundle, check the tube box flange seal, floating head cover flange seal and related parts.
③ shell process pressure test: install the outer head cover, pressurize the shell process, check the shell, the outer head cover flange seal and related parts.
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