Boiler Tube Research (Super-Heater) Part 1

Pipe number #2 is a segment from the pipes in secondary super-heater area. Super-heater functional is increasing saturated steam temperature from a drum into more hot steam called steam super-heat by using hot gas from furnace combustion results. Super-heater divided into two, namely primary and secondary super-heater



Primary super-heater serves to raise a saturated steam temperature from a drum into steam super-heat by earn the hot gases from furnace combustion. Primary super-heater inlet temperature is 304C and outlet temperature is 414C.


Secondary super-heater is located at the crossing of very hot gas that is above the combustion chamber and the heat radiation is received directly from the combustion chamber. The steam temperature enter to secondary super-heater was 414 C and exit steam temperature was 541C, pressure 169 kg/cm2. Steam comes out of the secondary super-heater is then used to rotating the HP Turbine.

From information obtained that the pipeline has been operating for about 10 years, namely since 2004. The pipeline has not experienced to be replacement because it is designed to operate for approximately 30 years. This pipe number 2 materials (SSH Pipe) was originally stated to SA-213-T22, but on 2 May 2014 got confirmation that material actually is SA-213-T12. Specification in detail of the pipe and its operational conditions are described in Table 2.1 and Table 2.2.



Another information about operating condition, Inner pipe temperature 414C, Inner pressure 17 MPa and Flue Gas temperature 900C.

Visual Inspection of Super-heater tube can be read on Boiler Tube Research (Super-Heater) Part 2.