Steel Square Pipes

We are offering steel square pipes.
1. Standard:
gbt3094-2000, gbt6728-2002, astm a500, jis g 3466, din en 10210, gbt178-2005
2. Steel grade:
s185, s235jr, s235jo, e295, s355jr, s355jo, s355j2, st33, st37, st50, st52, a570a,a513, a570d, a500, ss400b, fe490, fe510, q195, q215, q235, q275, q345, 20#, 45#, stainless steel201304, seamless steel, alloy steel.
3. Surface:
bared, galvanized, oiled, color paint, 3pe; or other anti-corrosive treatment.
4. Techinque:
hot rolled, cold rolled, erw, high-frequency welded.
5. Application:
(1).machinery manufacture: glass machinery, agricultural machinery, textile machinery, papermaking machinery, food machinery, electrical equipment, sanitation equipment.
(2).roads and bridges: railway, aviation, expressway, overpass, road fence, traffic signs.
(3).construction engineering: steel structure construction, sports venue, three-dimensional garage, exhibition hall.
(4).decoration: wrought iron doors and windows, outdoor advertising, pavilion and vestibule, glass curtain wall.
(5).transportation: automobile manufacture, ship manufacture, container, tricycle, tower crane.