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Help CenterSteel Pipe & Tube & Hot Dip Galvanized Steel Pipe，DN15、DN20、DN25、DN40、DN50、DN80
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Galvanized Steel Pipe Product Detailed Description
1. Product Overview
Galvanized steel pipe, namely hot-dip galvanized welded steel pipe, is made of high-quality carbon structural steel. After high-frequency welding forming, the inner and outer walls are coated with a uniform zinc layer by hot-dip galvanizing process.
It features high strength, strong corrosion resistance, easy processing and long service life. As a mainstream product in fluid transportation and structural support fields, it is widely exported to Southeast Asia, the Middle East, Africa, Europe, America and more than 140 countries and regions.
2. Executive Standards (National & International)
China: GB/T 3091-2015
American Standard: ASTM A53/A53M, ASTM A795
British & European Standard: EN 10255, BS 1387
Japanese Standard: JIS G3452, JIS G3444
Material Grade: Q195, Q215, Q235B, Q355B, 20#, A53 Grade A/B
3. Main Technical Parameters
3.1 Size Specifications (Customizable)
Nominal Diameter: DN15(1/2") ~ DN300(12")
Outer Diameter: 21.3mm ~ 323.9mm
Wall Thickness: 1.2mm ~ 12.0mm (SCH10/SCH40/Reinforced)
Standard Length: 6m / 9m / 12m; Custom fixed length available
Tolerance: Outer diameter ±0.3mm; Wall thickness ±5%; Length ±6mm
3.2 Galvanized Layer
Zinc Coating Weight: 60~275g/㎡ (Standard ≥80g/㎡, high zinc layer customizable)
Zinc Layer Thickness: ≥85μm, uniform inside and outside, no missing plating, no peeling
Surface: Silver gray, bright and smooth, no burrs, no rust, no scratches
3.3 Mechanical Properties
Tensile Strength: ≥330MPa
Yield Strength: ≥205MPa
Elongation: ≥25%
Hydrostatic Pressure Test: 2.5~5.0MPa, no leakage and no deformation
3.4 Chemical Composition
| Element | C | Mn | P | S | Cu |
|---|---|---|---|---|---|
| Content(%) | ≤0.25 | ≤0.95 | ≤0.05 | ≤0.06 | ≤0.40 |
4. Product Advantages
Excellent Corrosion Resistance & Long LifespanDouble protection of steel and zinc layer, acid & alkali resistant, salt spray resistant. Service life reaches 20~30 years in normal environment, 10~20 years in humid outdoor conditions.
High Strength & SafetyAdopt high-quality carbon steel and mature welding technology, suitable for high-pressure fluid conveying.
Smooth Inner Wall & Low ResistanceSmooth inner surface avoids scaling, reduces fluid resistance and energy consumption; elegant appearance for all installation environments.
Easy Processing & Fast InstallationSupport cutting, welding, threading, grooving and flange connection, greatly saving construction time.
Eco-friendly & RecyclableNon-toxic zinc coating, comply with EU RoHS & ISO environmental standards, 100% recyclable.
Reliable Quality & Third-Party InspectionComplete quality control, available with SGS, TUV, ISO certification and support third-party testing.
5. Application Fields
Construction: Water supply & drainage, fire sprinkler system, scaffolding, steel structure support
Municipal Engineering: Urban water supply, gas transmission, sewage treatment, road guardrail
Agriculture: Greenhouse frame, farm irrigation pipe, breeding shed structure
Industry: Petrochemical, electric power, machinery manufacturing, equipment base
Energy & Traffic: Photovoltaic bracket, power transmission tower, highway guardrail, port machinery
6. End Treatment & Custom Service
6.1 Pipe End Type
Plain End
Beveled End (30°/45°)
Threaded End (Imperial & American thread)
Grooved End
6.2 Export Packaging
Bundled with galvanized steel strip, both ends protected by plastic caps; anti-rust oil, PVC coating and customized packaging available for sea transportation.
6.3 Customization
Special outer diameter, wall thickness and fixed length; high zinc layer; threading, grooving, chamfering, painting and logo printing are acceptable.
7. Quality Assurance & Foreign Trade Service
Strict production control with eddy current inspection and hydrostatic test for each pipe.
Provide mill test certificate, zinc layer report, mechanical property report and relative certificates.
Delivery: Stock goods within 7 days. Support FOB / CIF / CFR.
Payment Term: 30% TT deposit, 70% TT balance against copy of B/L.
8. Common Specification List
| DN | NPS | OD(mm) | WT(mm) | Weight(kg/m) |
|---|---|---|---|---|
| DN15 | 1/2" | 21.3 | 2.75 | 1.26 |
| DN20 | 3/4" | 26.9 | 2.75 | 1.63 |
| DN25 | 1" | 33.7 | 3.25 | 2.42 |
| DN40 | 1 1/2" | 48.3 | 3.50 | 3.87 |
| DN50 | 2" | 60.3 | 3.75 | 5.18 |
| DN80 | 3" | 88.9 | 4.00 | 8.38 |
| DN100 | 4" | 114.3 | 4.00 | 10.85 |
| DN150 | 6" | 168.3 | 4.50 | 18.18 |
| DN200 | 8" | 219.1 | 6.00 | 31.45 |
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