Steam Blowing Services
Target Plates
At Steam Blowing Services Ltd we can supply target plates to suit any commercially available material. Our target plates are manufactured in house and can be supplied to meet your requirements. The specification of steam blowing target plates will normally be set by the steam turbine Manufacturer along with the target plate acceptance criteria.
Typical target plate acceptance criteria
The limits to acceptable target plate damage are:
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No indentation exceeding 0.8 mm diameter.
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Indentations exceeding 0.4 mm diameter to number not more than 2 per 1000 mm2 of the target plate surface.
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Indentations exceeding 0.2 mm to number not more than 10 per 1000 mm2 of the target plate surface.
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Indentations less than 0.2 mm to be well dispersed with low concentration and or nowhere present on concentration.
Steam blowing target plates need to have a surface finish better than the size of particles that the acceptance criteria is in order to be able to see the impacts clearly. In most cases the Steam Turbine acceptance criteria size will be in the region of 0.2mm. Therefore we recommend that the target plate finish is 0.1mm or better. SBS target plates generally have a surface finish of 0.02mm. This has a clear mirror finish which makes it easier to test to 0.2mm for final inspection of the steam blow.
Target plates supplied my SBS
Loupe scale for measuring inpacts on the target plate