Galvanized Steel Pipe

The materials of galvanized steel pipes are mainly divided into two types of processes: hot-dip galvanizing and cold galvanizing, and there are significant differences in their material characteristics and application scenarios
Hot dip galvanized steel pipe
Using ordinary steel pipes as the base material and treated with hot-dip galvanizing process, it has strong corrosion resistance, high adhesion, and uniform coating, and is widely used in building water supply and drainage, gas transportation, power line trunking and other scenarios.
Cold galvanized steel pipe (electro galvanized)
The zinc coating is formed on the outer wall of the steel pipe using electroplating technology, but the coating is thin and easy to peel off, with poor corrosion resistance.

temgalvanised iron erw steel pipe / gi pipe
StandardBS 1387, BS 1139, BS EN10025, BS EN 39, BS EN10219, ASTM A53-2007, API 5L, JIS G3444-2006, DIN EN 10025
GradeST37, ST52, A53(A,B), A106(B,C), Q235, Q345, Q195, 16mn
Thickness0.5mm - 20mm
Section ShapeRound，square，rectangle
Place of OriginChina
Surface TreatmentGalvanized
Tolerance±5%
Processing ServiceBending, Welding, Punching, Cutting, Threading, Grooved, Shoulered
Product nameGalvanized iron pipe
Length5.8M, 6.0M, 1-12.0M
Hot dip GalvanizedZinc Coated 200-500g/m2
Pre-galvanizedZinc Coated 40-200g/m2
Materialmild steel
Steel GradeA53 gr.b, A106(B,C),S235jr,S355jr, A500 A/B/C, Q235,Q355
EndsPlain ends, Threaded ends, Grooved ends,
End protectorPVC caps
Brand NameTanggang
TestingMechanical Properties,Chemical Component Analysis

Chemical Composition of ASTM A53

ElementGrade A (%)Grade B (%)
Carbon (C)≤ 0.25≤ 0.30
Manganese (Mn)≤ 0.95≤ 1.20
Phosphorus (P)≤ 0.05≤ 0.05
Sulfur (S)≤ 0.045≤ 0.045
Copper (Cu)≤ 0.40≤ 0.40
Nickel (Ni)≤ 0.40≤ 0.40
Chromium (Cr)≤ 0.40≤ 0.40
Molybdenum (Mo)≤ 0.15≤ 0.15
    
The provided chemical compositions and mechanical properties are general approximations. Please contact our Customer Service Department for material test reports.            
lementTypical Content Range (mass fraction)Function and Influence
C0.01%~0.25%Improves strength and hardness, but excessive content reduces weldability and corrosion resistance.
Si0.01%~1.7%Enhances corrosion resistance and oxidation resistance; excessively high content may reduce coating adhesion.
Mn0.30%~2.1%Improves toughness and strength; in some high-strength grades (e.g., S350GD+Z), the content can reach 1.6%~2.1%.
P≤0.035%Enhances atmospheric corrosion resistance, but excessive content increases the risk of cold brittleness.
S≤0.025%Controls sulfide inclusions and reduces processing cracks.
Al0.02%~0.06%Refines grain structure and improves coating adhesion.
Ni0.03%~0.10% (in some automotive sheets)Enhances corrosion resistance and coating bonding strength.

This product is widely used in the fields of building structures, mechanical manufacturing, automotive parts, energy equipment, and home hardware, and is suitable for scenarios such as load-bearing frames, precision parts, and industrial pipelines. With excellent physical performance and stability, it can easily meet the demands of high strength, high wear resistance, and extreme environments. Support collaboration with engineering teams to provide material selection suggestions and assist clients in efficiently implementing their projects.

Shandong Tanggang Metal Products Co., Ltd. is located in Jinan, China's largest steel production base, adjacent to the ports of Tianjin and Qingdao. We manufacture and supply stainless steel, carbon steel, steel plates, steel pipes, galvanized steel coils, color-coated galvanized steel coils, and various profiles (rails, I-beams, H-beams, angles, etc.) year-round. We can also customize other metal products according to customer needs. Our annual export volume is approximately 1.1 million tons. We guarantee that almost all inquiries will be processed within three hours. We have a professional testing center equipped with advanced testing equipment and employing over ten technical experts and professional testing personnel. We provide chemical composition analysis, mechanical property testing, and microstructure analysis of steel, providing reliable assurance of product quality and supporting product research and development and improvement. All products are supplied in accordance with DIN/EN, ASTM/ASME, DIN, and JIS standards, and can be supplied according to customer-provided standards and technical specifications. Our clients include industries such as petroleum, chemical machinery, power generation, water treatment equipment, elevators, kitchenware, food processing, pressure vessels, and solar water heaters. Our business principles are: customer first, excellent quality, comprehensive product range, and reasonable pricing. Shandong Tanggang Metal Products Co., Ltd. sincerely hopes to establish long-term cooperative relationships with our customers for mutual benefit and common development

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