FIELD: process engineering.
SUBSTANCE: invention relates to surface coating, particularly, cement-sand facing of pipeline inner surface. Facing head additionally incorporates reducing valve arranged on feed pipe and smoothing appliance secured thereon. Both and smoothing appliance are arranged aligned on centrifugal shot wheel. At least, two couplings are arranged at end face of the latter to make half-coupling therewith. Note here that feed pipe consists of two parts coupled by thread joint. Note also that pipe one part is provided with internal thread for reducing valve attachment.
EFFECT: inner surface facing plus smoothing by compressed air.
2 dwg
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