GI Pipe (Hot Dipped Galvanized Steel Tube)

Our GI pipes (Galvanized Iron Pipes) are high-performance structural and fluid transportation tubes, manufactured using the hot-dipped galvanizing process for maximum longevity. Adhering to international standards such as BS1387:1985, ASTM A53, and EN10255, our pipes feature a heavy-duty zinc coating with an average weight of 280g/m² (40μm). With over 15 years of manufacturing experience, we ensure that every GI pipe is 100% hydro-tested and finished with precision burr-free ends, making them ideal for plumbing, gas delivery, and high-strength scaffolding systems.

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Technical Specifications

Technical Category Details & Specifications
Product Name GI Pipe / Hot Dipped Galvanized Steel Tube
Standard Compliance EN10255, ASTM A53, BS1387:1985, EN39, BS1139, JIS3444
Material Grade S195GT / S235GT / S355GT, Q195, Q235, Q345
Outer Diameter (OD) 1/2” – 10” (21.3mm – 273mm)
Wall Thickness 1.5mm – 14mm
Zinc Coating Normal AVG: 280g/m² (40um); Max. 70um
Length Range 1m – 16m (Standard & Customized)
Pipe End Treatment Plain (Burr-free), Threaded, Grooved, Beveled
Testing 100% Hydrostatic Test Guaranteed
Business Type Professional Manufacturer

Key Performance Advantages

Premium Anti-Corrosion Protection: Our hot-dipped process creates a robust zinc barrier. With an average coating of 280g/m², our GI pipes provide significantly better protection against rust than pre-galvanized alternatives, making them the top choice for outdoor infrastructure and fluid transport.
Precision Burrs-Free Plain Ends: We utilize dedicated in-line clean-end machines to remove all internal and external burrs. This meticulous process ensures smooth fluid flow and prevents injuries during on-site handling, which is a critical safety requirement for European and American contractors.
Specialized Scaffolding Specialization: We are a leading manufacturer of 48.3mm OD scaffolding tubes (3.2mm/4.0mm thickness). These comply strictly with EN39, BS1139, and EN10219, offering a zinc coating above 210g/m² for long-term corrosion resistance in shoring and formwork systems.
Verified Fluid Safety: All GI pipes intended for water or gas delivery undergo a 100% hydro-test. This rigorous inspection guarantees structural integrity and zero leakage under specified pressures.

Product Applications

Fluid Transport: Reliable delivery pipes for low-pressure water, gas, and steam.

Construction Scaffolding: High-strength structural components for building maintenance and temporary access towers (specifically 48.3mm GI tubes).
Agricultural Frameworks: Durable frames for large-scale greenhouses and farming infrastructure.
Industrial Infrastructure: Fencing, structural columns, and protective conduits in corrosive environments.

Packaging & Delivery

Packaging: Secure seaworthy bundles with steel strips. Optional damp-proof wrapping is available to ensure the zinc surface remains pristine during sea freight.
Port of Shipment: Fast dispatch via Xingang Port, Tianjin, China.
Delivery Time: Normally 18-20 days after payment confirmation (T/T, L/C, D/P, or O/A).
Logistics: Flexible shipping via Container or Bulk carrier to optimize freight costs for large-scale orders.

Frequently Asked Questions (FAQ)

Q: What is the difference between your GI pipe and regular pre-galvanized pipe?
A: Our GI pipes are hot-dipped galvanized after welding, ensuring an average zinc coating of 280g/m² (40um) on both internal and external surfaces, whereas pre-galvanized pipes usually have a much thinner coating (60-120g/m²).

A: Yes, we have over 15 years of experience in scaffolding tube production. We produce EN39, BS1139, and JIS G3444 standard tubes strictly according to technical requirements.

A: Absolutely. We can provide precision end treatments including threading (with sockets/couplings), grooving for mechanical joints, and beveling.

A: Yes. We have a professional QC team and fully support third-party inspections to verify material grade, wall thickness, and zinc coating weight before shipment.

A: Yes, we provide free samples for quality and standard compliance verification.

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