Civil steel pipe: produced according to KS, JIS, BS, ASTM standards. Used for water supply systems, for civil pipes.
Pressure resistant steel pipe: manufactured according to KS, JIS standards. For equipment under pressure at a temperature not exceeding 3500C.
Wiring conduit: includes metal conduit, thin conduit, thick conduit. Manufactured according to KS, JIS standards. Use wire covers, always optical cables.
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