Specification :ERW Circular Hollow Section Special Attributes : Tough constructionHigh performance Corrosion resistanceResistant to ChemicalsFine finishingDurable Used In : Engineering IndustryFencingScaffoldingStructuralConstruction Technical Specification : Length 6.0 mtr + 0.05 mm customized length ranging from 4 meter to 8 meter may be supply Thickness For all Size : + 10.00% Outer Dimensions 1% with a minimum of 0.5 mm Corners squareness 90 degree + 2 Degree Corner Radius Maximum, 3 x (Thickness of Section) Weight, on individual length + 10% -8% on lots of metric tons + 7.5% Straightness Minimum 1:200th of any length measure along the center line (mill Straightened condition) unless otherwise specifically arranged Twist tolerance Maximum 2 mm : 1:0.5mm, 1 meter length, the measure relative vertical shift of any adjacent corner of the section, measure by keeping any side on flat surface. End finish Plain ended mechanically sheared, mill cut finish without further finishing Surface Finish Black without any surface treatment of oiling and vanishing Packaging Bundled by sealing metal stripe and each bundle is label for size, measurement, lot on, etc. approximate weight of each bundle is 1 metric tons, (+ 300 to 350 Kgs) Identification Marking to Iron Mark Emblem is surface punched on all RHS, SHS and CHS. ERW Circular Hollow Section : Size mm (O.D.) Size Inch Weight (Kg/ 6 mtr) Thk. mm 19 1/2 3 1.15 19 1/2 4 1.25 25 3/4 4 1.05 25 3/4 5-6 1.25 25 3/4 7 1.90 31 1 6 1.20 31 1 7 1.40 31 1 8 1.70 31 1 9-10 2.00 41 1.1/4 7 1.15 41 1.1/4 9 1.40 41 1.1/4 11 1.90 41 1.1/4 12 2.00 41 1.1/4 13-14 2.30 41 1.1/4 16-17 2.90 48 1.1/2 8 1.05 48 1.1/2 9 1.20 48 1.1/2 11 1.60 48 1.1/2 12 1.70 48 1.1/2 14 2.00 48 1.1/2 16-17 2.40 48 1.1/2 20 2.90 58 2 10 1.10 58 2 11 1.25 58 2 12 1.30 58 2 15 1.70 58 2 17 2.00 58 2 20 2.30 58 2 23 2.0 76 3 17 1.50 76 3 20-22 1.80 88 4 25 1.90 ERW Square Hollow Section : Size mm (O.D.) Size Inch Weight (Kg/ 6 mtr) Thk. mm 20 x 20 3/4 x 3/4 4 1.05 20 x 20 3/4 x 3/4 5-6 1.25 20 x 20 3/4 x 3/4 7 1.90 25 x 25 1 x 1 6 1.20 25 x 25 1 x 1 7 1.40 25 x 25 1 x 1 8 1.70 25 x 25 1 x 1 9-10 2.00 30 x 30 1.1/4 x 1.1/4 7 1.15 30 x 30 1.1/4 x 1.1/4 9 1.40 30 x 30 1.1/4 x 1.1/4 12 2.00 30 x 30 1.1/4 x 1.1/4 13-14 2.30 40 x 40 1.1/2 x 1.1/2 6 0.80 40 x 40 1.1/2 x 1.1/2 7 0.90 40 x 40 1.1/2 x 1.1/2 9 1.20 40 x 40 1.1/2 x 1.1/2 11 1.60 40 x 40 1.1/2 x 1.1/2 12 1.70 40 x 40 1.1/2 x 1.1/2 14 2.00 40 x 40 1.1/2 x 1.1/2 16-17 2.40 40 x 40 1.1/2 x 1.1/2 20 2.90 50 x 50 2 x 2 12 1.30 50 x 50 2 x 2 15 1.70 50 x 50 2 x 2 17 2.00 50 x 50 2 x 2 20 2.30 50 x 50 2 x 2 23 2.70 60 x 60 2.1/2 x 2.1/2 17 1.50 60 x 60 2.1/2 x 2.1/2 20-22 1.80 72 x 72 3 x 3 25 1.90 ERW Rectangular Hollow Section : Size mm (O.D.) Size Inch Weight (Kg/ 6 mtr) Thk. mm 40 x 20 1.1/4 x 3/4 7 1.15 40 x 20 1.1/4 x 3/4 9 1.40 40 x 20 1.1/4 x 3/4 12 2.00 40 x 25 1.1/4 x 1 7 1.15 40 x 25 1.1/4 x 1 9 1.40 40 x 25 1.1/4 x 1 12 2.00 50 x 25 2 x 1 7 0.90 50 x 25 2 x 1 9 1.20 50 x 25 2 x 1 12 1.70 50 x 25 2 x 1 14 2.00 50 x 25 2 x 1 16-17 2.40 50 x 25 2 x 1 20 2.90 60 x 40 2 x 1.1/2 12 1.30 60 x 40 2 x 1.1/2 15 1.70 60 x 40 2 x 1.1/2 17 2.00 60 x 40 2 x 1.1/2 20 2.30 75 x 25 3 x 1 12 1.30 75 x 25 3 x 1 15 1.70 75 x 25 3 x 1 17 2.00 75 x 25 3 x 1 20 2.30 80 x 40 3 x 1.5 17 1.50 80 x 40 3 x 1.5 20-22 1.80 96 x 48 4 x 2 25 1.90