Galvanized steel pipe
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- Product Description
-
what is a galvanized steel pipe?
Galvanized Steel Pipe is manufactured by coating a layer of zinc on the surface of steel pipe to improve its corrosion resistance and extend service life. With excellent durability, strong mechanical properties, and good weldability, galvanized pipes are widely used in construction, water supply, scaffolding, fencing, greenhouse structures, and various industrial applications.
Available in round, square, and rectangular shapes, our galvanized steel pipes can be supplied as hot-dip galvanized pipe, pre-galvanized pipe, or electro-galvanized pipe, meeting international standards such as ASTM, BS, EN, JIS, and DIN.
Shineyond Group offers a full range of galvanized steel pipes with different diameters, wall thicknesses, and zinc coating thickness options to meet diverse project requirements. We ensure high-quality surface finish, uniform zinc coating, and long-lasting performance, making them ideal for demanding environments.
Common materials
The main materials of galvanized steel pipe are: Q195, Q235, Q345 grades, of which Q235 and Q345 are the more common grades.
Galvanized steel pipe product parameters
Thickness（mm） 0.12-5.0 thickness （ g/㎡） 50-600 Width（mm） 90-1500 Surface treatment C/R/C5/A/O/U Zinc layer weight（g/㎡） 60~275 Range of application Refrigerator, washing machine,
air conditioning, microwave oven, lighting, TV, audio and video
Grade Q195, Q235 SGCC, SGCH,SGC340 SGC400 SGC440 SGC490 SGC570 SGHC SGH340 SGH400 SGH440 SGH490 SGH540 DX51D DX52D DX53D DX54D S220GD S250GD S280GD S320GD S350GD S400GD S500GD S550GD Surface treatment Regular spangle,Minimum spangle, Zero spangle, Big spangle Hardness Soft hard(HRB60),medium hard(HRB60-85),full hard(HRB85-95) Surface Treatment Chromated/Non-Chromated, Oiled/Non-oiled, Skin pass ct number Yield strength Tensile strength Elongation after fracture ratio A80(%)(>=) Nominal thickness <=0.04 0.04-0.06 0.60-1.0 1.0-1.2 SGCC 205 270 - - SGCD1 - 270 - 34 36 38 SGCD2 - 270 - 36 38 40 SG340 245 340 20 20 20 20 SG400 295 400 18 18 18 18 SG440 335 440 18 18 18 18 Galvanized steel pipe size chart
DN
Size
(inches)
Outer diameter
(MM)
Wall thickness
(MM)
Weight
(KG/M)
DN15
1/2
21.3
2.8
1.357
DN20
3/4
26.9
2.8
1.76
DN25
1
33.7
3.2
2.554
DN32
1-1/4
42.4
3.5
3.56
DN40
1-1/2
48.3
3.5
4.10
DN50
2
60.3
3.8
5.607
DN65
2-1/2
76.1
4.0
7.536
DN80
3
88.9
4.0
8.88
DN100
4
114.3
4.0
11.53
Galvanlzed Square steel pipe Specification size
Type
Outer diameter
Wall thickness
length
MOQ
Packing
Delivery time
Square pipe
10mm-200mm
0.5mm-9mm
6m-12m or customized size
None
Bundle or bulk
In stock
Galvanized steel pipe Advantages
Galvanized steel pipes offer outstanding corrosion resistance, thanks to the protective zinc coating that prevents rust and extends service life even in harsh environments. They combine high strength and durability with excellent weldability and machinability, making them suitable for a wide range of applications from construction to water systems. Compared with ordinary steel pipes, galvanized pipes provide low maintenance costs, long-lasting performance, and reliable protection against mechanical damage and environmental impact. Their cost-effectiveness and versatility make them an ideal choice for infrastructure, industrial, and agricultural projects worldwide.
Production Process
The manufacturing method of black pipe (furnace welding or electric welding) is selected by the manufacturer. Galvanizing is to make the molten metal react with the iron matrix to produce an alloy layer, so that the matrix and the coating are combined. Galvanizing adopts hot dip galvanizing method and cold galvanizing method.
① Hot dip galvanizing is to pickle the steel pipe first. In order to remove the iron oxide on the surface of the steel pipe, after pickling, it is cleaned in an ammonium chloride or zinc chloride aqueous solution or a mixed aqueous solution of ammonium chloride and zinc chloride, and then sent to the hot dip galvanizing tank.
Hot-dip galvanizing: black parts inspection → hanging → degreasing → rinsing → pickling → cleaning → dipping plating agent → hot air drying → hot dip galvanizing → internal and external blowing → cooling → passivation and rinsing → unloading → inspection, trimming → typing and marking → packaging, storage and transportation.
② Cold galvanizing is electrogalvanizing. It uses electrochemical method to use zinc ingot as anode. Zinc atoms lose electrons and become ions to dissolve in the electrolyte. Steel material is used as cathode. Zinc ions get electrons on steel and are reduced to zinc atoms and deposited on the surface of steel, so as to form a uniform, dense and well-bonded metal or alloy deposition layer.
Electrogalvanizing: galvanized strip → unwinding → stretching → coiling → welding → scraping → passivation and rinsing → zinc supplementation → shaping → typing and marking → cutting → packaging → drying → weighing.
Galvanized steel pipe Application
1. Construction & Infrastructure
Widely used in buildings, pipelines, and bridges for superior corrosion resistance in harsh environments.
2. Water & Fluid Transport
Ideal for municipal water systems and industrial pipelines, safely conveying water, oil, gas, and chemicals.
3. Structural Frameworks
Provides reliable support as columns, beams, and frames in commercial and industrial structures.
4. Furniture Manufacturing
Popular for durable, aesthetically pleasing furniture frames and supports.
5. Industrial Applications
Versatile solution for agricultural, manufacturing, and equipment support needs.
Reliable galvanized steel pipe manufacturers
As a leading manufacturer of high-quality galvanized steel pipes, Shineyond Group ensures durability, corrosion resistance, and superior performance for various industrial and construction applications.
Why Choose Shineyond Group?
✅ Premium Materials – Made from high-grade steel with uniform zinc coating for enhanced protection.
✅ Advanced Manufacturing – Precision welding, hot-dip galvanization, and strict quality control.
✅ Wide Range of Products – Available in multiple sizes, thicknesses, and specifications.
✅ Competitive Pricing – Cost-effective solutions without compromising quality.
✅ Global Standards Compliance – Meets ASTM, DIN, JIS, and GB standards.
Galvanized steel pipe
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Galvanized steel pipe
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Hot dipped galvanized square steel pipe
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