GI-pipes

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The Only Manufacturer in Sri Lanka that Hot-dip
Galvanize After the Formation of the Pipe
steel sri lanka

Why Choose
Lanwa GI Pipes?

The only manufacturer in Sri Lanka who hot-dip galvanize after the formation of the pipe. Thereby ensuring a complete long-term corrosion resistance with a galvanize coating of over 55 microns, inside as well as outside. As opposed to tubes, which are formed using pre-galvanized sheeting, with low galvanize coating thickness. The important feature to note is the galvanize free stipe that can be seen in the inner weld of these tubes that is prone to corrosion quickly. The telltale feature to note in a LANWA GI Pipe is the inner weld, which is completely C oated in galvanize.
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D N No:Profile SizeWall ThicknessOutside Diameter mmNo. of Pipes Per BundleNo. of Pipes Per Ton (Average)
InchesmmmmMinMax
15½151.821.021.4169188
20¾201.826.426.9153147
251252.033.233.8127106
32322.341.942.59172
40402.347.848.46163
502502.359.660.23748
65652.575.276.01935
803802.987.988.71927

MECHANICAL SPECIFICATIONS OF HOT-DIP GALVANIZED LANWA GI PIPES
SLS 829 : 2009

Item
(1)
Tensile Strength
RM2 Min.
N/mm2
(2)
Upper Yield Strength
ReH, Min.
N/mm2
(3)
Elongation after
fracture on gauge
Length,A 5.65√S0
(4)
Pipes32019520

CHEMICAL SPECIFICATION OF LANWA GI PIPES

ConstituentPer cent
C0.20 Max
Mn1.40 Max
P0.04 Max
P0.04 Max
S0.04 Max

ZINC COATING SPECIFICATIONS

Item
(1)
Local Coating Thickness Min. µm
(2)
Mass of Zinc Coating Min. g/m2
(3)
GI Pipes50360