Hot-dip Galvanized Steel Pipe

Hot-dip Galvanized Steel Pipe

Hai Nhung Trading Company Limited would like to extend a warm welcome to our customers. We specialize in providing high-quality steel plates across various categories, and our commitment is to deliver products that are authentic and bear the manufacturer's imprints. With a skilled and experienced workforce, we have successfully met the material requirements for significant design and construction projects in the Northeast-Northwest region. Our ultimate goal is to build long-lasting partnerships with clients, partners, and suppliers, driving us collectively towards sustainable progress.

1. What is Hot-Dip Galvanized Steel?

Hot-dip galvanization, a corrosion protection method since 1836, involves applying a thin layer of zinc over a thicker base metal to protect it from the environment. Over the past 180 years, its demand has increased, especially in construction, transportation, and products that require higher protection standards.

2. Characteristics of hot-dip galvanized steel pipe:

• Plating Thickness: 40 - 80μm (contrasting with cold zincs 20 - 30μm)
• Coating Surface: Rough, with a distant "silver" luster. Coating consistency varies.
• Durability: Yield strength 195 MPa, tensile strength 320 ÷ 520 MPa. Lifespan ranges from 50+ years in rural settings to 20 years in urban/sea areas.
• Cost-Effective: A viable alternative to austenitic stainless steel or aluminum for corrosion prevention.

3. Standard of Hot-Dip Galvanized Steel Pipe:

The most popular standards are the American ASTM standard, British BS EN standard, ISO standard, and Japanese JIS standard. Additionally, there are Vietnamese standards tailored to our country's climate conditions.

British BSI standards for hot-dip galvanized steel pipes include:

• BS EN 10255:2004 - Technical standards for welded steel pipes
• BS 1387-1985 - Standard for welded steel pipes
• BS 4504 - Flange standard
• BS 21 - Thread standard

American Standard ASTM:

• ASTM A53/A53M-10 - Pipeline specifications
• A530-A530/A530M-99 - Technical standard for general requirements of carbon steel and special alloy pipes
• ISO 9001 quality management system standard issued by the International Organization for Standardization

Japanese Standard JIS:

• JIS G3444:2015 - Standard for carbon steel pipes for general structure
• JIS G3466:2015 - Standard for carbon steel square and rectangular pipes for general structure

Vietnamese Standards:

• TCVN 5408:2007 (ISO 01461:1999) - Standard for hot-dip zinc coating on the surface of cast iron and steel products, with technical requirements and test methods
• TCVN 7665:2007 (ISO 1460:1992) - Standard on Metallic Coatings, covering hot-dip zinc coating on ferrous materials and determining coating mass per unit area
• TCVN 12514:2018 - Standard for steel with zinc coating used for concrete reinforcement

4. Advantages of Hot-Dip Galvanized Steel Pipe:

• Corrosion Resistance: The zinc layer forms ZnO, Zn(OH)2, and a protective basic zinc carbonate film, preventing corrosion.
• Strength: Durable and sustainable for up to 50 years due to corrosion resistance.
• Coating Toughness: Endures transportation and impact without peeling.
• Full Protection: Even in recesses and sharp corners, the steel is fully galvanized.
• Time and Cost Efficiency: Faster than other methods and cost-effective with comparable anti-corrosion performance.

5. Specifications:

6. Application of Hot-Dip Galvanized Steel Pipe:

• Railings, coastal works, scaffolding
• Oil and gas pipelines
• Fire protection water pipes
• Highway railings, fences
• Automotive and motorcycle industry
• Household applications

Discover the strength within our steel pipes – the ultimate choice for your construction aspirations. At Hai Nhung Trading Company Limited, we are invested in your success. With every steel pipe we supply, we are helping you lay the groundwork for a prosperous future.