303 module
The calculation methods according to TRD 303 are especially suitable for dished heads at steam boilers, and particularly for reversal chamber tops. The TRD 303 not only covers the determination of the required wall thickness, but also considers related problem aspects. Thus, TRD 303 provides solution methods for various nozzle arrangements, especially for oblique or not radial arranged nozzles. Furthermore, the wall thickness can be proved according to this standard for different head types.
The module 303 covers the calculations according to TRD 303. This module includes the material data base, which considers the conditions according to TRD 300. If necessary, the user can refer to the saturated steam curve of the water vapour tables, such that the calculation temperature for the design pressure can be determined, analogously to TRD300.
TRD 303 / appendix 1
Appendix 1 is valid for the recalculation of components, which are designed according to TRD 301 with regard to varying stresses, caused by internal pressure on one hand and radial temperature differences on the other hand at hereby maximally stressed places.
TRD 303 / September 1990