black steel pipe


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black steel pipe

Uncoated steel pipe, called “black” because of the dark-colored iron-oxide scale formed on its surface; usually used for low-pressure hot-water heating pipes.
References in periodicals archive ?
3 pieces combined supply air extractors, 13 000 - 14 000 m 3 / h air volume flow 3 000 m 2 ducts and fittings made of galvanized sheet steel with insulation made of aluminum-clad mineral wool 900 m spiral-folded pipe and fittings made of galvanized sheet steel dn 100 - dn 250 with insulation made of aluminum-clad mineral wool 220 pieces volume flow controllers round and square, constant and variable and silencers 300 pieces of air outlets as poppet valves, grilles and swirl diffusers 200 pieces fire dampers round and square 1 piece compression refrigeration unit for indoor installation 190 kw cooling capacity 750 m of pipes made of black steel pipe and copper pipe dn 15 - 100 including closed-cell rubber insulation.
17 m - heating buffer 1 500 liters - split-type compact distributor for 6 heating groups with fittings and pumps - distribution lines basement and risers made of black steel pipe.
Gas condensing boiler 460 kw 2 500 m black steel pipe dn 15 - dn 80 100 pcs.
cooling pipes made of black steel pipe dn 65 to dn 200; each including molding and connecting pieces, sealing and fastening material, including insulation; 1 pc cold water buffer tank 2 000 liters; 1 pc pressure test station; 53 units convection cooling units as wall and ceiling units.
Four tenders for the supply of (a) medium voltage cables carrying columns structure made of galvanized steel, (b) similar columns made of galvanized steel, (c) low voltage cables carrying structural columns made of black steel pipes & (d) medium voltage switchboards for a 1,500 K.