Discover the excellence of Haihao Group’s hot-dip galvanizing process for flanges

At Haihao Group, our commitment to delivering top-quality pipe fittings extends beyond exceptional materials and precision engineering. We take immense pride in offering products that are not only durable and reliable but also highly resistant to corrosion. One such testament to our dedication is our hot-dip galvanized (HDG) process for flanges, ensuring that our 4in slip on flange CL150 FF CS A105HDG dims to ASME B16.5 stands strong in even the harshest environments. Let’s take a closer look at the remarkable HDG process flow of these flanges:

Step 1: Thorough Cleaning and Surface Preparation

The HDG process begins with thorough cleaning of the flange surface. It is essential to remove any dirt, grease, or impurities that could hinder the galvanizing process. Our expert technicians meticulously prepare the flange surface to ensure optimal bonding with the zinc coating.

Hot dip galvanizing for flange

Step 2: Acid Pickling for Surface Activation

Once cleaned, the flange undergoes acid pickling. This crucial step removes any remaining oxidation or mill scale, further enhancing the flange’s surface for effective zinc adhesion. The acid pickling process ensures the flange is in its purest form, ready to receive the protective zinc coating.

Step 3: Pre-Fluxing for Enhanced Bonding

Next, the flange undergoes pre-fluxing, which involves the application of a flux solution to the surface. The flux enhances the bonding between the steel and the zinc, ensuring a uniform and durable galvanized coating.

Step 4: Immersion in Molten Zinc

Here comes the heart of the HDG process! The prepped flanges are carefully immersed in a bath of molten zinc at a temperature of around 450°C (842°F). The high-temperature molten zinc chemically reacts with the steel surface, forming a robust and seamless zinc-iron alloy layer.

Step 5: Cooling and Solidification

Once the flanges are coated with the molten zinc, they are carefully lifted from the zinc bath and allowed to cool and solidify. This critical cooling process ensures that the zinc coating adheres firmly to the flange surface, providing excellent protection against corrosion.

Step 6: Inspection and Quality Assurance

Our commitment to quality is unwavering. Before the HDG flanges are ready to serve our esteemed customers, they undergo rigorous inspection and quality assurance processes. Our skilled inspectors thoroughly examine the zinc coating for uniformity, thickness, and adherence, ensuring that only the highest quality products reach our customers.

Step 7: Delivering Excellence to You!

Once our 4in slip on flange CL150 FF CS A105HDG dims to ASME B16.5 successfully passes the HDG process and meets our stringent quality standards, they are ready to embark on their journey to your projects. Whether you are operating in corrosive marine environments or any challenging industrial setting, rest assured that our HDG flanges will stand the test of time, delivering exceptional performance and unparalleled corrosion resistance.

Choose Haihao Group for Your HDG Flange Needs!

When it comes to protecting your investments and ensuring long-lasting performance, Haihao Group’s hot-dip galvanized flanges are the ideal choice. We take pride in providing solutions that offer superior resistance to corrosion, enhanced durability, and reliability. With our HDG process flow, your projects are equipped to thrive even in the most demanding environments. Trust Haihao Group for your pipe fittings needs, and experience the excellence that has made us a trusted partner for customers worldwide. Contact us today and let our experts assist you in finding the perfect HDG flange solutions for your unique requirements!