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.

Hot-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*40mm~300*500mm Wall Thickness:
 Round  pipe:0.95~17.75mm
Square and rectangular pipe:1.7~16mm Standard:Hollow  section: ASTMA500,EN10219,EN10210,JIS3466,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 standard
Painting method: Spray white paint Packing:
 OD not less than 273mm: Loose packing.piece by piece.
OD less than 273mm: In hexagonal seaworthy bundles packed by steel strips.
Small size nested into big size

FACTORY INTRODUCTION

Tianjin Ruitong Iron and Steel Co., Ltd. is a large-scale steel manufacturer and have been specializing in producing straight welded pipe, spiral welded pipe, precision pipe, galvanized steel pipe, prestressing steel strand and so on for over 20 years.
Come and join us, you will enjoy RuiTong's rich producing experience, high quality products and customers-oriented service!!!