Classification of square tube production process
The square tube is divided into production processes: hot -rolled seamless square tube, cold pull -out seamless square tube, squeezing seamless square tube, and welding square tube. Among them, the welding prescription tube is divided into: (a) according to the process -arc welding square tube, resistance welding square tube (high frequency, low frequency), gas welding square tube, furnace welding square tube Slim welding tube, spiral welding square tube
Classification of Material Materials
The square pipe is divided by material: general carbon steel square tube, low alloy square tube. General carbon steels are divided into: Q195, Q215, Q235, SS400, 20#steel, 45#steel, etc.; Low alloy steels are divided into Q345, 16MN, Q390, ST52-3, etc.
Classification of Founded Management Standards for Production Standards
The square management is divided into production standards: national standards, daily standards, British -based square management, US standards, European standards, and non -standard square management.
Classification of square tube section surface
The square tube is classified according to the shape of the section: (1) Simple section square tube -square square tube, rectangular square tube (2) complex section square tube -flower -shaped square tube, opening square tube, ripple -shaped square tube, and alien square tube.
Classification of surface treatment of square tube
The square tube is treated with surface treatment: hot -dip galvanized square tube, electro -galvanized square tube, oil -coated square tube, and pickled square tube.
Classification of square pipes
Classification of square pipes is classified according to the purpose -decorative use of square pipes, machine tool equipment square pipes, mechanical industrial square pipes, chemical square pipes, steel structure square pipes, shipbuilding square pipes, automotive square pipes, steel beam pillar square squares Tube, special use square management.
Classification of square tube wall thickness
The torque tube is classified by the wall thickness -ultra -thick wall square tube tube, thick wall tone tube and thin wall square tube
Executable standard
GB/T6728-2002, GB/T6725-2002, GBT3094-2000, JG 178-2005, ASTM A500 JIS G3466, EN10210 or Technical Agreement Application: widely used in machinery manufacturing, construction industry, metallurgy industry, agricultural vehicle, agricultural greenhouses, agricultural greenhouses , Automotive industry, railway, highway guardrails, container bones, furniture, decoration, and steel structure fields.
Flowing Figure Steel Pipe Index
Product execution standards: GB/T6728-2002, GB/T6725-2002, GBT3094-2000 JG 178-2005 A500 JIS G3466 GB/T3094-2000 (National standard) cold-pressure rectangular rectangular tube
GB/T6728-2002 (National standard) structure with cold curved hollow steel
ASTM A500 (US standard) Structure for welding rectangular tubes and seamless rectangular tubes for carbon steel and seamless rectangular tube for carbon steel
EN10219-1-2006 (European standard) cold-shaped welding hollow structural profile of non-alloys and fine grains
JIS G 3466 (daily standard) generally structural angle rectangular tube
Seamless tone tube product material: Q235, Q345 (16mn), 20#, alloy steel, stainless steel.
The use of square tube products: machinery and equipment, solar energy equipment, steel structure, automotive components, bridges
