GB/T 6728 Cold formed steel hollow sections pipes for general structure

Specifications

 GB/T 6728 Cold formed steel hollow sections pipes for general structure  

Hollow Sections:
SHS(Square Hollow Sections), RHS(Rectangular Hollow Sections), Round, Triangular, Hexagonal, Elliptical Hollow sections, Scaffolding

Applications:
Construction: Hall Structure, Sea Trestle, Airport Structure, Shipbuilding, Security Door Frames, Garage Doors, Strengthening Liners of Steel Doors and Windows, Indoor Partition Walls, Cable Bridge Structures and Expressway Safety Guards, Balustrade, Decorating, Residential, Ornamental Pipes Automotive Parts:Motorcar Case,Car and Bus Manufacture, Vehicles
Agriculture: Agricultural Equipment
Industry: Machinery,Solar Stent, Offshore Oil Field, Mine Equipment, Electromechanical Hardware, , heavy engineering, Mining and Resources, Process Engineering, Materials Handling,Mechanical Parts
Traffic: Walking Rails, Roll-up Doors, Guardrail, Plaza Structure, Signage, Road Furniture, Fencing
Logistics Storage: Supermarket Shelves, Containers, Transport Industries, Commercial Construction
Other: Sports Apparatus, Leisure Equipment, Furniture, School Furniture
Scaffolding Tube: Material Storage Racks, Pallets, Hydraulic Platforms, Trusses, Columns, Purlins, Greenhouse Stands Towers

Standard & Grade
ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
ASTM A500 Cold Formed Welded and Seamless Carbon Steel Steel Structural Tubing in Round and Shapes

EN 10210 Hot finished structural hollow sections of non-alloy and fine grain structural steels
EN 10219 Cold formed welded structural hollow sections of non-alloy and fine grain steels

JIS G 3466 Carbon steel Square for general structural purposes

BS 1387 Steel Tubes for use for Water, Gas, Air and Steam
BS 6323 Part5 seamless and welded steel tubes for automobile mechanical and general engineer purpose
BS 1139 Metal scaffolding

DIN 1626 welded circular tubes of non alloy steels with special quality equirements
DIN 2395 Rectangular and square welded precision steel tube or hollow sections

GB/T 13793 Longitudinal electric resistance welded steel tubes
GB/T 6728 Cold formed steel hollow sections for general structure--Dimensions,shapes,weight and permissble deviations

Process: ERW and Seamless

Size:
Hollow Sections:
Square:10 mmx10mm - 500 mmx500mm
Retangular:10mm x 20mm - 600mmx400mm
Round: 1/8" - 4"
Wall Thickness: 0.5 - 20.0mm
Length:0.3 mtr - 18 mtr as customer required

Scaffolding Tube:
Outer Diameter: 38mm, 42mm, 48.3mm-48.6mm
Wall Thickness: 2.0mm, 2.5mm, 2.75mm, 3.0mm, 3.25mm, 3.85mm, 4.0mm
Length: 0.3mtr -18 mtr

Process:
Seamless: Hot Rolled, Hot Explored
Welded: ERW, HFW
Coating: Hot-dipped Galvanised, Electrical Galvanised

Raw Material:
Seamless: Pipe Billet( Hot Rolled, or Con-casting), Mother Pipe
Welded: Hot Rolled Steel Coil (HRC) , Cold Rolled Steel Coil (CRC), Pre-pained Galvanized Steel Strip

End: Square cut, Burr removed
Surface: Lightly oiled, Hot dip galvanized, Electro galvanized, Black
Heat Treatment: Bright Annealed, Black Annealed

Packing:
Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips

Test:
hemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Flaring Test, Bending Test, Hardness Test, Blow Test, Impact Test etc), Exterior Size Inspection