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HOLLOW SECTION TUBE 

Shape: 
Hollow Sections: Square, Rectangular, Round, Triangular, Hexagonal, Eliptical Hollow sections
Scaffolding
Quality Standard: 
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 
ASTM A500 Cold Formed Welded and Seamless Carbon Steel Steel Structural Tubing in Round and Shapes
ASTM A 53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
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
IS : 1161 Steel Tubes For Structural purpose and Electric poles.
IS : 3601 Steel tubes for mechanical & general engineering purposes.
IS : 3074 Steel tubes for Automobile purpose.
IS : 4923 Steel tubes for Hollow sections used in structures
DIN 1626 WELDED CIRCULAR TUBES OF NON ALLOY STEELS WITH
SPECIAL QUALITY EQUIREMENTS 
DIN 2394 WELDED AND SIZED PRECISION STEEL TUBES
Scaffolding Tube:
GB 15831 Steel tube scaffold couplers
EN 39 Loose steel tubes for tube and coupler scaffolds 
BS 1139 Metal scaffolding
Steel Grade:
GB/T 13793, GB/T 6728, GB 15831: 
Q195, Q215, Q235, Q275, Q295, Q345, 08F, 08, 08AL, 08F, 10F, 10, HG5, DF08 
EN 10210, EN 10219, BS 1387: S185, S235, S235JR, S235 G2H, S275, S275JR, S355JRH, S355J2H, St12, St13, St14, St33, St37, St44,ST52
ASTM A500, ASTM A 53: Gr. A, Gr B, Gr C, Gr.D, DC01, DC03, 1008, 1010
JIS G 3466: SS330, SS440, SS490, SPHD, SPHE
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: Chemical 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
Mill Test Certificate: EN 10204/3.1B

Steel grade

A53/A106/API 5L GrB, A179, A192, A210, A333 Gr3 Gr6, A213 T11/T12/T22, API 5L Grade B/X42/X46/X52/X56/X60/X65/X70/X80/X100, J55,K55,N80,L80 9Cr 13Cr, ST35/ST45/ST52, Q235B/Q345B, S235JRH/S275J0H/S275J2H/S355J0H/S355J2H/S355K2H, DIN1629 ST37/ST44/ST52, DIN17175 ST35.8/ST45.8/15Mo3/13CrMo44/10CrMo910, ASTM A312 TP304/TP304H/TP304L/TP316/TP316L/TP316H/TP316Ti/TP317/TP317L/TP321/TP321H/TP347/TP347H/TP310S/TP310H/TP 904L, ASTM A789 S31500/S31803/S32205/S32750/S32760, S31254, S31603, S31050, ALLOY 800/800H/800HT, C276 , ALLOY 400/K500, ALLOY 59, 600, 601, 625, 602CA, NICKEL 200/201