Cast blast lined pipe and fittings is composed by lined with cast
basalt pipe, outside steel pipe and cement mortar filling between
the two layers.
Cast Basalt is a mineral of exceptionally high abrasion resistance,
unlimited resistance to moisture, high compressive strength and
resistance to virtually all acids and alkalis and is completely
corrosion free. Cast blast is produced by melting selected natural
basalt broken into sizes of 20-50 mm in shaft furnaces at
temperatures around 1,300C, following by casting at which the
melted basalt forms uniforms pherolithic crystals hence producing
its typical physical properties, in particular its exceptional
hardness and wear-resistance.
Cast basalt reaches a value of hardness of 8(min) on the Moh’s
hardness scale. For comparison: the highest value10is only attained
by diamonds. By virtue of these properties, the silicate cast
basalt provides outstanding protection against abrasion and
scrubbing.
However, it is marked by ascertain sensitivity to impacts. Under
Normal services conditions, cast basalt withstands temperatures up
to approx. + 350C or-40C. However Cast basalt should not be
subjected to temperature shocks.
Sizes: Cast basalt produces are manufactured as tiles, from pieces
and segments. Straight pipes are spun-cast, available for nominal
bores of 32 to 600 mm with the wall thickness ranging from 20 to
30mm and a standard length of 500mm.samller nominal bores of
straight pipes, pipe segment for radial of 40 to 3,000mm of various
angles, as well as special form piece linings are predominantly
sand-cast. The standard wall-thickness is 20mm. depending on the
respective quantity, steel moulds can also be used, the wall
thickness in those cases usually being 30 to 40mm.
Advantages
Fused cast basalt surfaces remain smooth and low in friction when
used over time, thereby offering the benefit of low caking.
Fused cast basalt provides excellent protection against the
following abrasive media: ore - sinter - ash - slag - sand - coal -
clinker.