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How GI Pipes Are Made — The Complete Manufacturing Process

Galvanized Iron (GI) Pipes are steel pipes coated with a layer of zinc to protect them from rust and corrosion. At Hi-Tech Pipes Limited , we manufacture GI pipes using a state-of-the-art hot-dip galvanizing process , ensuring strength, safety, and long service life for every pipe we produce. 1️⃣ Raw Material Selection The process begins with high-quality mild steel (MS) coils or strips . These are carefully inspected for surface finish, thickness, and mechanical properties to ensure they meet IS:1239 and IS:3589 standards . 2️⃣ Pipe Forming (ERW Process) The steel coil is slit into strips and fed into a tube-forming mill , where it is shaped into a circular tube . The edges are welded together using the Electric Resistance Welding (ERW) method, forming a strong and continuous seam. The welded joint is then heat-treated to restore uniform strength throughout the pipe. 3️⃣ Surface Cleaning & Preparation Before galvanizing, the pipes undergo a series of cleaning processes: ...
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what is the difference between gi and gp pipes

  Difference Between GI and GP Pipes Both GI (Galvanized Iron) and GP (Galvanized Plain) pipes are steel pipes coated with zinc to protect them from rust and corrosion — but they differ in the process of galvanization, surface finish, and applications . 1. Manufacturing Process GI Pipes (Galvanized Iron): Made by hot-dip galvanization . The steel pipe is dipped into molten zinc, forming a thick and uniform zinc coating on both the inside and outside surface. GP Pipes (Galvanized Plain): Made by electro-galvanization . A thin layer of zinc is electroplated onto the surface of cold-rolled steel sheets before being formed into pipes. This process gives a smooth and shiny finish , but the coating is thinner than hot-dip GI. 2. Coating Thickness & Protection GI Pipes: Have a thicker zinc coating (≈40–120 microns) , offering stronger protection against rust and suitable for outdoor and underground use . GP Pipes: Have a thinner zinc coating (≈5–20 microns) , ...
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What is GI Pipe? Meaning, Types & Uses

In the world of plumbing, construction, and agriculture, GI Pipes (Galvanized Iron Pipes) are among the most widely used steel products. Known for their strength, corrosion resistance, and versatility , these pipes are essential for carrying water, gas, and other fluids — especially in outdoor and industrial environments. What Is a GI Pipe? GI Pipe stands for Galvanized Iron Pipe . It is a type of steel pipe that has been coated with a layer of zinc through a process called galvanization . This zinc coating acts as a protective barrier, preventing the steel from rusting or corroding when exposed to moisture, air, or chemicals. As a result, GI pipes last longer than regular mild steel pipes, especially in outdoor or humid environments. How Are GI Pipes Manufactured? GI Pipes are usually made through the ERW (Electric Resistance Welding) process followed by galvanization . Here’s how it works: Steel Preparation – Mild steel coils are slit into strips. Pipe Forming – The...
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Best Firefighting Pipes Ensuring Safety with Strength

 In emergencies, seconds matter. A reliable firefighting system is the first line of defense against fire hazards, and at the core of that system are firefighting pipes . Choosing the best firefighting pipes ensures not only safety but also efficiency in controlling and extinguishing fires. What Are Firefighting Pipes? Firefighting pipes are specially designed pipes used in fire protection systems. They carry water or fire-suppressing agents from the source to sprinklers, hydrants, and hoses. Unlike ordinary pipes, firefighting pipes are manufactured to meet stringent safety standards, ensuring strength, durability, and pressure resistance during emergencies. Key Features of the Best Firefighting Pipes High Pressure Resistance – Can withstand sudden surges in water pressure. Corrosion Resistance – Long life in humid and fire-prone environments. Certified Safety Standards – Meet IS, ASTM, and international codes. Durability – Reliable in both indoor and outdoor ins...
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Metal Beam Crash Barriers Ensuring Road Safety Across India

Every day, millions of vehicles travel on highways, bridges, and expressways. To ensure the safety of drivers and passengers, Metal Beam Crash Barriers (MBCBs) play a crucial role. These barriers are designed to absorb impact energy, prevent vehicles from veering off the road, and minimize the severity of accidents. What Are Metal Beam Crash Barriers? Metal Beam Crash Barriers , also known as guardrails or W-beam barriers , are road safety structures made from galvanized steel. They are installed along highways, bridges, and dangerous curves to protect vehicles and passengers during collisions . The key purpose of crash barriers is to: Prevent vehicles from crossing into opposite lanes. Stop vehicles from falling off elevated roads and bridges. Absorb and deflect collision impact to reduce damage. Types of Metal Beam Crash Barriers W-Beam Crash Barriers Made from galvanized steel in a “W” shape. Commonly used on highways and expressways. Thrie-Beam Crash B...
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Color Roofing Sheets Stylish, Strong & Sustainable Roofing Solution

In today’s world, roofing is not just about protection—it’s also about style, durability, and efficiency . That’s where Color Roofing Sheets come in. Known for their vibrant finish, long life, and versatile applications, color-coated roofing sheets are fast becoming the top choice for residential, commercial, and industrial projects. What Are Color Roofing Sheets? Color Roofing Sheets are high-quality steel sheets coated with a layer of paint and protective coatings. These sheets are designed to withstand harsh weather while adding an aesthetic appeal to buildings. Made using advanced coating technology, they offer corrosion resistance, UV protection, and long-lasting performance , making them better than traditional roofing materials. Key Features of Color Roofing Sheets Durability – Resistant to corrosion, moisture, and UV rays. Aesthetic Appeal – Available in a wide range of vibrant colors. Lightweight – Easy to handle, transport, and install. Cost-Effective – Reduc...
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GP Pipe Manufacturers in India Building Strength with Durability

The demand for GP Pipes (Galvanized Plain Pipes) is rapidly growing in India, thanks to their strength, corrosion resistance, and versatility . From greenhouses and furniture to water supply and construction projects, GP pipes are now a preferred choice for engineers, farmers, and builders. What Are GP Pipes? GP Pipes are mild steel pipes that are coated with zinc through the galvanization process . Unlike GI pipes, which are dipped in molten zinc (hot-dip process), GP pipes are manufactured using an electro-galvanization method , giving them a smooth finish and excellent corrosion resistance. This makes GP pipes ideal for both indoor and outdoor applications where durability and appearance matter. Features of GP Pipes Smooth Zinc Coating – Provides a uniform and shiny finish. Corrosion Resistance – Protects against rust in humid and wet conditions. High Strength & Reliability – Suitable for load-bearing and long-lasting use. Easy to Fabricate – Can be cut, bent, ...
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