Hot dip galvanized welded pipe
Hot-dip galvanized pipe is to make molten metal react with iron matrix to produce alloy layer, so that the matrix and coating can be combined. First ,in order to remove the iron oxide on the surface of steel pipes, pickling is needed, ater tis ,the pipes are cleaned in a tank with aqueous solution of ammonium chloride or zinc chloride or mixture of the two and then sent into the hot-dip galvanizing tank. Hot-dip galvanizing has the advantages of uniform coating, strong adhesion and long service life.
H
ot-dipped galvanized steel pipe type F, Type E and Type S. including of grade A and grade B,
ASTM A53,A500,A252,A795,BS1387-85,GB/T3091,ISO R65,API 5L
Product Specifictions | |
Material: |
GrA,Gr.B,Gr.C,
S235,S275,S355, A36,SS400, Q195,Q235,Q345 |
Outer Diameter: |
Square
pipe:20*20mm~400*400mm
Rectangular pipe:20*4 0 mm ~300*500 mm |
Wall
Thickness:
|
Round
pipe:0.95~17.75mm
Square and rectangular pipe:1.7~16mm |
Standard: | Hollow section: ASTMA500,EN1 0219, EN 10210, JIS 3466, GB /T 6728 |
Certificate: | SO 9001:2008,SGS,BV,CCIC etc |
Finish of pipe: |
Hot
dipped
galvanized
with
zinc
220~260g/m2;
Pre-Galvanized with zinc 30 - 150g/m2 Painted with black/varnish lacquer; Oil on the surface to prevent rust; Bare pipe without painting: |
Pipe
End:
|
Plain
end/
Bevel
end
Groove end; Joint with flange; Threaded |
Marking: |
As
per
client
requirement
or
mill
stand
ard
Painting method: Spray white paint |
Packing:
|
OD
not
less
than
273mm
:
Loose
packing
.
piece
by
piece
.
OD less than 273 mm : In hexagonal seaworthy bundles packed by steel st rips. Small size nested into big size |