The pipelines involved in pipe blowing include high-pressure main steam pipeline, high-temperature reheat steam pipeline, reheat cold section pipeline and low-pressure bypass pipeline. High pressure main steam pipeline is designed as id298 × 81, made of a335p92; The high temperature reheat steam pipeline is id883 × A392, p3556; The reheat cold section pipeline is od1016 × 38.1, all made of A691 1-1/4Cr CL22。 The high side and some formal pipes not involved in pipe blowing shall be cleaned and derusted by manual sand blasting.
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