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What is the Difference between Hot Dip Pipe and GI Pipe?
time2026/05/07
- People often confuse hot dip pipe with GI pipe. Both types resist corrosion. But they differ in process, coating thickness, and durability. Let us explain the key differences clearly.
People often confuse hot dip pipe with GI pipe. Both types resist corrosion. But they differ in process, coating thickness, and durability. Let us explain the key differences clearly. We are a leading Chinese manufacturer. YUANTAI DERUN specializes in steel pipes. We produce hot-dip round steel pipe and many other products. Our quality meets global standards. Read on to learn more.
Understanding Hot Dip Pipe and GI Pipe
Hot Dip Pipe (Hot Dip Galvanized Pipe)
1.We immerse the pipe in molten zinc.
2.The zinc bath temperature reaches around 450°C.
3.This forms a thick, metallurgical bond.
4.The coating is very durable and uniform.
5.So it suits harsh outdoor environments well.
GI Pipe (Pre-Galvanized Pipe)
1．We galvanize the steel strip before forming.
2．The zinc layer is thinner and smoother.
3．The process uses electrolysis or cold rolling.
4．Therefore it looks shiny and attractive.
5．But it offers less corrosion resistance.
Key Differences You Must Know
1. Coating Thickness
Hot dip pipe has a thicker coating. It ranges from 50 to over 100 microns. GI pipe only has 10 to 30 microns. So hot dip lasts much longer.
2. Production Process
Hot dip pipe gets galvanized after forming. GI pipe gets galvanized before forming. This changes the final performance. We control both processes strictly at YUANTAI DERUN.
3. Durability in Harsh Conditions
Hot dip pipe resists rust for decades. Use it for outdoor structures or marine areas. GI pipe works for indoor applications. Think of electrical conduits or light frames.
4. Cost and Application
GI pipe costs less initially. But hot dip pipe saves money over time. You replace it less often. Our hot-dip galvanized square tube proves this value well.
Why Choose YUANTAI DERUN as Your Steel Pipe Manufacturer
We are a trusted steel pipe manufacturer with global reach. Our group started in 2002. We now operate 18 subsidiaries. Our facilities cover 1,600 acres. Over 2,200 employees work with us. We have 65 ERW/HFW pipe lines. Also 26 galvanizing lines. So we produce wholesale steel pipe in huge volumes.
Our certifications prove our quality. We hold ISO9001, ISO14001, and OHSAS18001. Also EU CE, BV, JIS, DNV, ABS, and LEED. So you receive fully compliant products. We source steel from HBIS, Baosteel, and TPCO. These are state-owned mills. Thus every pipe meets global standards.
Our Product Range Meets Your Needs
We manufacture various shapes and sizes.
Hot-dip round steel pipe: Diameter from 10.3 mm to 2032 mm. Wall thickness from 0.5 mm to 80 mm.
① Hot-dip galvanized square tube: Size from 10×10 mm to 1000×1000 mm.
② Rectangular pipes: 10×15 mm up to 800×1200 mm.
③ We also make LSAW, SSAW, and seamless pipes.
Our processes include ERW, HFW, JCOE, and hot/cold forming. We hold over 100 patents. So we innovate constantly. You get reliable products for construction, infrastructure, and energy projects.
How We Ensure High Quality
Quality is our top priority. We use advanced testing methods. Each batch undergoes strict inspection. We check coating thickness and adhesion. Also we test mechanical properties. Our ISO and CE certificates confirm this. You never worry about substandard materials. Our wholesale steel pipe service delivers consistency. We ship worldwide without delays.
Marketing Message – Welcome to Choose Our Products
Dear customers, you need a dependable partner. We offer the best hot-dip round steel pipe on the market. Our hot-dip galvanized square tube resists corrosion perfectly. Choose us as your primary steel pipe manufacturer. We provide wholesale steel pipe at competitive prices. Contact us for bulk orders. We guarantee fast delivery and technical support. Our team speaks your language. We solve your pipe problems quickly.
Final Summary and Our Service Commitment
In summary, hot dip pipe differs from GI pipe in thickness and durability. Hot dip pipe lasts longer outdoors. GI pipe suits light indoor use. But both have their places. We at YUANTAI DERUN produce both types with excellence. Our green future strategy drives sustainable manufacturing. We also promote structural steel pipes worldwide. Our service includes logistics, trade, and after-sales support. We rank among China's Top 500 Private Enterprises. So trust our experience. Welcome to choose our products. Email us or visit our Tianjin base. Let us build a stronger future together.