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Nezone Tubes Limited Steel Tubes for Scaffolding Tubes Confirming to BS 1139 (Part-1)/1982

Dimensions and Tolerances for Welded Steel Tubes

Parameter

Dimensions and Mass

Tolerances

Outside Diameter

48.3mm

± 0.5mm

Thickness

4.0mm

Welded Tube + 0.8mm
- 0.4mm

Nominal mass per unit length

4.37 kg/mtr.

Single Tube max - 7.5%
Quantities of 150m and over ± 4%

Length

if specified exact

± 6.0mm

 

otherwise

Random length of 4 to 7 Mtr.

Straightness

 

1/600 of length

 

Mechanical properties of the tubes:

Chemical composition (ladle analysis)

Tensile strengths 340 N/mm˛ to 460 N/mm˛

Yield Strength 210 N/mm˛ min

Elongation 22% min

 

C 0.20% max

Si 0.30% max

  P 0.060 % max

  S 0.060 % max

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