| 摘要 |
<p>A boiler tube protection block, comprising an essentially parallellogram shaped body (11), an annular cut-out at all four comers, with the cutting point of two adjacent sides as a centre. An assembly of a boiler protection block and a ferrule (21) with a radius essentially corresponding to the central annular hole of the block. A boiler, and a method for furnishing a boiler inner wall, comprising applying protection blocks against the wall, and arranging ferrules through at least the annular cut-outs.</p> |
