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Home > Metallurgy, Mineral & Energy > Steel & Products > Steel Pipe & Tube > DN50 DN80 Hot Dip Galvanized Steel Pipe Threaded GI Tube for Fire Fighting Water Supply System
DN50 DN80 Hot Dip Galvanized Steel Pipe Threaded GI Tube for Fire Fighting Water Supply System
Product Spotlights
Adopt complete hot-dip galvanizing technology, thick and uniform zinc coating tightly bonded with steel substrate.
Resist oxidation, rainwater, salt fog and acid corrosion, suitable for long-term outdoor buried or exposed use.
Effectively extend service life of pipeline system, reduce later maintenance and replacement cost.
Resist oxidation, rainwater, salt fog and acid corrosion, suitable for long-term outdoor buried or exposed use.
Effectively extend service life of pipeline system, reduce later maintenance and replacement cost.
Negotiable
MOQ: 1 Metric Ton (Price negotiable depending on order volume and customization)
Key Specifications
Get Latest Price
Type:
Welded
Warranty:
1
Technique:
Hot Rolled
Payment & Shipping
Payment Methods:
Port of Shipment:
Tianjin
Delivery Detail:
15 days
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Type
Welded
Warranty
1
Technique
Hot Rolled
Surface Treatment
Galvanized
Usage
Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose, Other
Material
Carbon Steel
Section Shape
Round
Product Name
Hot Dip Galvanized Steel Pipe, GI Pipe, Zinc Coated Round Steel Tube
Material Grade
Q195, Q235, Q345
Production Standard
ASTM A53, GB/T 3091, BS 1387
Production Technology
ERW Welded Galvanized Pipe / Seamless Galvanized Pipe
Zinc Coating Process
Hot Dipped Galvanizing
Inch Size
1/2“, 3/4“, 1“, 1.25“, 1.5“, 2“, 2.5“, 3“, 4“, 5“, 6“, 8“
Outer Diameter
21.3mm, 26.8mm, 33.7mm, 42.4mm, 48.3mm, 60.3mm, 76.1mm, 88.9mm, 114.3mm, 139.7mm
Wall Thickness
1.8mm, 2.0mm, 2.3mm, 2.5mm, 2.75mm, 3.0mm, 3.25mm, 3.5mm, 3.75mm, 4.0mm
Length
6m fixed length, Custom cut length 1–12 meters
Pipe End Treatment
Plain End Threaded End (Male thread) Threaded End with GI Coupling Bevel End Wit
Transport Package
Export packaging
Specification
National standard can be customized
Origin
China
Product Overview
Hot dip galvanized steel pipe, also known as GI pipe, is manufactured by ERW high-frequency welding or seamless forming, then immersed into molten zinc liquid for full hot-dip galvanization. A tight zinc-iron alloy layer forms on the pipe surface to isolate air and moisture, delivering long-term anti-rust and anti-corrosion performance.Main raw materials are Q195 and Q235 low carbon steel, complying with ASTM A53 and GB/T3091 standards. Widely adopted in construction scaffolding, fire protection water supply, agricultural greenhouses, municipal plumbing, fence posts and solar support systems. Our factory owns complete production lines, sufficient spot inventory and customizable processing services for global bulk buyers.
Technical Parameter Table
| Item | Detailed Specification |
|---|---|
| Product Name | Hot Dip Galvanized Steel Pipe, GI Pipe, Zinc Coated Round Tube |
| Material Grade | Q195, Q235, Q345 |
| Executive Standard | ASTM A53, GB/T 3091, BS 1387 |
| Production Craft | ERW Welded Galvanized Pipe / Seamless Galvanized Pipe |
| Outer Diameter | 21.3mm, 26.8mm, 33.7mm, 42.4mm, 48.3mm, 60.3mm, 76.1mm, 88.9mm, 114.3mm, 139.7mm, 168.3mm, 219.1mm |
| Nominal Diameter | DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100, DN125, DN150, DN200 |
| Inch Size | 1/2", 3/4", 1", 1-1/4", 1-1/2", 2", 2-1/2", 3", 4", 5", 6", 8" |
| Wall Thickness | 1.8mm, 2.0mm, 2.3mm, 2.5mm, 2.75mm, 3.0mm, 3.25mm, 3.5mm, 4.0mm |
| Standard Length | 6m fixed length, custom length 1–12m |
| Pipe End Type | Plain End, Threaded End with Coupling, Bevel End, with Plastic Caps |
| Zinc Coating Weight | Standard:60–120g/m²; Heavy zinc:180–275g/m² |
| Mechanical Index | Tensile strength ≥375MPa; Yield strength ≥235MPa |
| Surface Feature | Uniform zinc layer, anti-rust, anti-corrosion, salt fog resistant |
| Optional Processing | Custom cutting, threading, heavy zinc galvanizing |
| Attached Documents | Mill Test Certificate (MTC), support third-party inspection |
Packaging & Shipment
Packaging: Bundled by steel belts, waterproof paper wrapping, plastic protective caps for both ends; wooden pallet packaging optional for container loading
Trade Terms: FOB, CFR, CIF for major global ports
Lead Time: In-stock goods deliver in 10-15working days; customized orders with stable production cycle
Transport Advantage: Compact bundled loading to maximize container utilization and cut logistics cost
Send Inquiry to This Supplier
1Yr
Business Type
Manufacturer
Year Established
2015
Factory Size
10,000-30,000 square meters
Annual Export Value
US$5 Million - US$10 Million
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