Coated in zinc, Galvanized Steel Pipes for Water are protected from oxidation and rust, which ultimately prevents deterioration of the pipe. Galvanized Steel Pipes are a great option when you need to protect your steel pipes from a corrosive environment.
EN 10255 Galvanized Steel Pipes for water are used mainly for the automobile sectors, interior & exterior architectural structures, water pipe lines, Gas lines, Oil & Gas industries, etc.
EN 10255 has two types: Heavy Type and Medium Type.
O.D: 10.6-166.5mm
W.T: 2.0-5.4mm
L: 5800mm/6000mm
Ends Process: Plain, Threaded, Threaded & Socketed.
EN 10255 Hot Dip Galvanized water Pipe Chemical composition and mechanical properties:
| Steel Grade | Chemical composition % | Mechanical Properties | ||||||
Yield strength | Tensile strength | Elongation | ||||||
Steel Name | Steel Number | C max | Mn max | P max | S max | ReH min. (MPa) | Rm (MPa) | A min. % |
S195T | 1.0026 | 0.20 | 1.40 | 0.035 | 0.030 | 195 | 320 to 520 | 20 |
EN 10255 Galvanized Steel Pipe for water Chemical Composition and Mechanical Properties:
| Steel Grade | Chemical composition % | Mechanical Properties | ||||||
Yield strength | Tensile strength | Elongation | ||||||
Steel Name | Steel Number | C max | Mn max | P max | S max | ReH min. (MPa) | Rm (MPa) | A min. % |
S195T | 1.0026 | 0.20 | 1.40 | 0.035 | 0.030 | 195 | 320 to 520 | 20 |
EN 10255 Galvanized Pipe Specification
| Specified outside diametera | Thread Sizea | Outside diameter | H | M | |||||
| Heavy series | Medium series | ||||||||
| D (mm) | R | max. (mm) | min. (mm) | Wall thickness | Mass per unit length of bare tube | Wall thickness | Mass per unit length of bare tube | ||
| T (mm) | Plain end (kg/m) | Socketed (kg/m) | T (mm) | Plain end (kg/m) | Threaded and socketed (kg/m) | ||||
| 10.2 | 1/8 | 10.6 | 9.8 | 2.6 | 0.487 | 0.490 | 2.0 | 0.404 | 0.407 |
| 13.5 | 1/4 | 14.0 | 13.2 | 2.9 | 0.765 | 0.769 | 2.3 | 0.641 | 0.645 |
| 17.2 | 3/8 | 17.5 | 16.7 | 2.9 | 1.02 | 1.03 | 2.3 | 0.839 | 0.845 |
| 21.3 | 1/2 | 21.8 | 21.0 | 3.2 | 1.44 | 1.45 | 2.6 | 1.21 | 1.22 |
| 26.9 | 3/4 | 27.3 | 26.5 | 3.2 | 1.87 | 1.88 | 2.6 | 1.56 | 1.57 |
| 33.7 | 1 | 34.2 | 33.3 | 4.0 | 2.93 | 2.95 | 3.2 | 2.41 | 2.43 |
| 42.4 | 1 1/4 | 42.9 | 42.0 | 4.0 | 3.79 | 3.82 | 3.2 | 3.10 | 3.13 |
| 48.3 | 1 1/2 | 48.8 | 47.9 | 4.0 | 4.37 | 4.41 | 3.2 | 3.56 | 3.60 |
| 60.3 | 2 | 60.8 | 59.7 | 4.5 | 6.19 | 6.26 | 3.6 | 5.03 | 5.10 |
| 76.1 | 2 1/2 | 76.6 | 75.3 | 4.5 | 7.93 | 8.05 | 3.6 | 6.42 | 6.54 |
| 88.9 | 3 | 89.5 | 88.0 | 5.0 | 10.3 | 10.5 | 4.0 | 8.36 | 8.53 |
| 114.3 | 4 | 115.0 | 113.1 | 5.4 | 14.5 | 14.8 | 4.5 | 12.2 | 12.5 |
| 139.7 | 5 | 140.8 | 138.5 | 5.4 | 17.9 | 18.4 | 5.0 | 16.6 | 17.1 |
| 165.1 | 6 | 166.5 | 163.9 | 5.4 | 21.3 | 21.9 | 5.0 | 19.8 | 20.4 |
| a For relationship between specified outside diameter (D), thread size (R) and nominal diameter (DN), see Annex A. T = specified wall thickness. | |||||||||
EN 10255 galvanized steel pipes are only permitted to be produced using the "welding process." The core processes are divided into two categories, suited to different sizes and precisions:
Suitable for pipes with an outer diameter of ≤ 219mm. High-frequency current is used to heat the galvanized steel water pipe edge and then squeeze and weld. The weld strength is ≥ 90% of the base material strength. This process offers high production efficiency and manageable costs. It is commonly used in municipal water/gas transportation.
Suitable for large-diameter pipes with an outer diameter greater than 219mm. Submerged Arc Welding (SAW) offers deep weld penetration and consistent quality, while Plasma Arc Welding (PAW) offers high precision and is suitable for industrial low-pressure fluid transportation (such as cooling water pipes).
● Appearance Inspection: No cracks, folds, scars, or delamination on the surface. Rust depth ≤ 10% of the wall thickness. Weld protrusion height ≤ 2mm (ERW pipe).
● Dimensional Inspection: Measure the outer diameter, wall thickness, and ovality of each pipe to ensure compliance with EN 10255 tolerances.
● Mechanical Testing: Three specimens are sampled from each batch and subjected to tensile and bend tests (bend angle 180°, bend center diameter = 3 x wall thickness). Acceptance is determined by the absence of cracks.
● Hydraulic Pressure Testing: All Galvanized Pipes undergo a hydrostatic test (test pressure = 2 x design pressure, maintained for 30 seconds with no leakage). The design pressure is calculated based on the wall thickness and brand.
● Weld Inspection: ERW pipes undergo eddy current testing (100% weld inspection), while arc-welded pipes undergo X-ray testing (sampling inspection ratio ≥ 10%) to detect internal weld defects.
● For low-pressure transmission (≤1.6 MPa, such as water/gas), P195TR1 (ERW process) is preferred for the best cost-effectiveness. For cold bending (e.g., on-site bending installation), choose P195TR2.
● For low-medium pressure (1.6-2.5 MPa, such as low-pressure steam): Choose P235TR1 (ERW for outer diameters ≤219 mm, SAW for diameters >219 mm). For circulating fluids (e.g., cooling water), choose P235TR2 for improved fatigue resistance.
● For corrosive environments (e.g., outdoor areas, humid industrial areas): Hot-dip galvanized EN 10255 steel pipe (galvanized layer thickness ≥85 μm) or anti-corrosion coating is recommended for extended service life.
● For large diameters (>273 mm), P235TR1/TR2 with submerged arc welding (SAW) is required to ensure weld strength and pipe stability.
Our galvanized water pipe undergoes a rigorous hot-dip galvanizing process that creates a metallurgically-bonded zinc coating, providing exceptional protection against rust and corrosion in harsh environments.
The water galvanized pipe features a uniform zinc coating that withstands physical abrasion and environmental degradation, ensuring reliable performance and extended longevity with minimal maintenance.
Manufactured according to EN10255 and other recognized standards, every galvanized water pipe guarantees consistent quality, safety and performance reliability.
The combination of durability, low maintenance requirements and long service life makes this galvanized steel water pipe an economically advantageous choice for water projects.
1. Project-Ready Galvanized Pipes with Full Customization
We supply precision-processed galvanized water pipes with complete customization services.
Offer accurate cutting to your specified lengths and tolerances.
Provide custom threading services for secure connections.
Execute precise drilling and fabrication according to your technical drawings.
Deliver galvanized water pipe solutions that integrate seamlessly into your projects.
2. Certified Quality Assurance
Every galvanized water pipe undergoes rigorous testing and quality control.
Provide complete EN 10204 3.1 Mill Test Certificate with every shipment.
Arrange third-party witnessed 3.2 MTCs for critical applications.
All galvanized water pipes strictly comply with international standards.
Comprehensive after-sales support ensures complete project satisfaction.
3. Reliable Technical Support
Technical team provides professional guidance on water galvanized pipe applications
Offer customized solutions for specific project requirements.
Ensure optimal performance of all water galvanized pipe products.
Maintain consistent communication throughout project execution.
Deliver technical documentation and support services.
Our commitment to quality customization and certified excellence makes us your trusted partner for water galvanized pipe requirements across various industrial applications.
Contact the Galvanized Water Pipe Experts at Hainan Yuan Steel Pipe
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