Galvanized Steel Pipe
from Turkey
Hot-dip galvanized steel pipe in Schedule 40 and 80, ASTM A53 Grade B. Supplied through certified Turkish partner mills with independent QA, multi-mill sourcing flexibility, and full documentation — delivered door-to-door to 50+ countries.
Our Galvanized Steel Pipe Range
Hot-dip galvanized steel pipe in Schedule 40 and 80, plus UL/FM certified fire sprinkler pipe — all sourced from certified Turkish partner mills with independent quality assurance.
Schedule 40 HDG Pipe
Standard-wall hot-dip galvanized steel pipe for water distribution, plumbing, structural, and general industrial applications. The default choice for most commercial and infrastructure projects. Zinc coating ≥ 550 g/m² per ISO 1461.
Schedule 80 HDG Pipe
Extra-strong wall hot-dip galvanized steel pipe for higher-pressure applications, heavy-duty structural use, and demanding industrial environments. Same OD as Schedule 40 with thicker wall for increased pressure capacity.
Fire Sprinkler Pipe
UL Listed and FM Approved hot-dip galvanized pipe specifically certified for wet-pipe fire sprinkler systems. Produced to ASTM A795 with enhanced zinc coating for standing-water service. DVGW certification available.
ASTM A53 Grade A vs Grade B
Grade B is the global industrial default for galvanized steel pipe. Grade A is specified only when superior weldability at lower strength is required.
| Grade | Type | Key Properties | Typical Applications |
|---|---|---|---|
| Grade B (Default) | ERW / Seamless | Tensile ≥ 415 MPa (60 ksi), Yield ≥ 240 MPa (35 ksi), C max 0.30% (ERW) / 0.35% (Smls), Mn max 1.20% | Water distribution, fire protection, structural, general industrial — the standard for virtually all commercial applications |
| Grade A | ERW / Seamless | Tensile ≥ 330 MPa (48 ksi), Yield ≥ 205 MPa (30 ksi), C max 0.25%, Mn max 0.95%, Elongation ≥ 30% | Low-pressure drainage, applications requiring superior weldability due to lower carbon content |
Zinc Coating Requirements (ASTM A53 Section 17)
| Parameter | Value |
|---|---|
| Total outer + inner surface | ≥ 1.8 oz/ft² (550 g/m²) |
| Each surface individually | ≥ 1.3 oz/ft² (400 g/m²) |
| Approximate zinc thickness | ~77 µm (45–120 µm range) |
| Zinc bath purity | ≥ 98% per ASTM B6 |
| Bath temperature | 450 ± 5 °C |
Not sure which schedule or grade fits your project? Contact our technical team for specification guidance.
Standards & Certifications
Every galvanized steel pipe we supply is backed by internationally recognized standards and full traceability — from raw material to pre-shipment inspection.
Every shipment includes complete documentation: Mill Test Certificate (MTC) per EN 10204 3.1, certificate of conformity, packing list, and fumigation certificate where required. EN 10204 3.2 is available on request. Third-party inspection by SGS, Bureau Veritas, or TÜV can be arranged.
Quality Assurance Department — MetalFromTurkey Trading Ltd.Industries We Serve
Hot-dip galvanized steel pipe serves critical applications across infrastructure, commercial, and industrial sectors worldwide.
Water Supply & Plumbing
Potable water distribution, building supply risers, and agricultural irrigation. HDG zinc coating prevents internal corrosion in water service, extending pipe life significantly.
Fire Sprinkler Systems
Wet-pipe fire sprinkler systems per ASTM A795 with UL Listed and FM Approved certification. Enhanced zinc coating for standing-water environments.
Structural & Construction
Load-bearing frames, scaffolding, handrails, and guard rails. HDG zinc coating provides decades of outdoor corrosion protection without field painting.
Fencing & Guard Rails
Chain-link fence posts, highway guard rails, and perimeter security. Schedule 40 minimum for structural loading — Schedule 80 for heavy-duty applications.
Agricultural Irrigation
Irrigation pipelines and greenhouse framing. The galvanized coating withstands outdoor exposure, soil contact, and moisture in agricultural environments.
HVAC & Mechanical
Hydronic heating, chilled water systems, and mechanical piping. Pre-galvanized options available for controlled indoor HVAC environments.
Why Source Galvanized Steel Pipe
from MetalFromTurkey?
Independent quality assurance, multi-mill sourcing, and galvanizing-specific QC — the advantages of sourcing through a Turkey-led supply network.
HDG Coating Quality Control
Three-stage galvanizing-specific verification: zinc bath purity (≥ 98%, ASTM B6), in-production magnetic gauge thickness measurement (≥ 550 g/m²), and pre-shipment visual uniformity check with photographic evidence per EN 10204 3.1.
A53 vs A795 Certification Routing
When your specification calls for ASTM A795, our sourcing team routes production exclusively to partner mills with active UL/FM and DVGW certification — preventing the common procurement error of receiving A53-certified pipe for fire protection.
Multi-Mill Access, Single Contact
One inquiry, one quotation benchmarked across multiple certified mills, one order, one consolidated documentation package. We match your spec to the mill with optimal galvanizing capacity for your size range.
Fast & Reliable Delivery
Turkey's strategic position enables rapid logistics: 10–15 business days to EU, 7–12 days to Middle East, 20–30 days to USA. FCL and LCL options with full logistics coordination.
From Inquiry to Delivery
A streamlined 5-step procurement process designed for efficiency and transparency.
Submit Inquiry
Send your specifications via our quick quote form or email. Include size, schedule, standard, quantity, and delivery location.
Receive Quotation
We benchmark across partner mills and return a detailed proforma invoice within 24–48 hours — including pricing, lead time, and documentation scope.
Production
Upon order confirmation, production begins at the selected partner mill. 7–21 day lead time. Quality inspections at every stage.
Inspection
Independent three-stage quality assurance: pre-production material verification, in-production dimensional and coating checks, pre-shipment final inspection.
Delivery
Door-to-door logistics with full documentation — MTC, quality reports, certificate of conformity, packing list, and Bill of Lading. EU delivery: 10–15 days.
Common Questions
What is the minimum order quantity for galvanized steel pipe?
Our standard MOQ is 5 tons. Flexibility is available for ongoing supply agreements or project-based orders with regular call-off schedules. Contact our sales team to discuss your specific requirements.
What certifications do your galvanized pipes carry?
All galvanized steel pipes are sourced from ISO 9001 and API Q1 certified partner mills. Products conform to ASTM A53 Grade B with zinc coating per ISO 1461. Every shipment includes Mill Test Certificates per EN 10204 3.1. EN 10204 3.2 is available on request. For fire sprinkler applications, we supply ASTM A795 certified pipe with UL Listed and FM Approved markings.
Do you supply fire sprinkler pipe (ASTM A795)?
Yes. We supply ASTM A795 UL Listed and FM Approved galvanized pipe specifically certified for wet-pipe fire sprinkler systems. Our sourcing team routes fire protection orders exclusively to partner mills with active UL/FM and DVGW certification. Email us for a fire sprinkler pipe quote →
Which regions do you deliver to?
We deliver door-to-door across the EU (all member states), Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), Central Asia, and USA. EU delivery: 10–15 days from Turkish port. We handle export documentation, customs clearance, and offer both FCL and LCL container shipping. Incoterms: EXW, FOB, CIF, DDP.
What is the difference between Schedule 40 and Schedule 80?
Schedule 40 and Schedule 80 share the same outer diameter at each nominal size but differ in wall thickness. Schedule 80 has a thicker wall, resulting in higher pressure capacity and greater weight but a smaller internal bore. Schedule 40 is the default for most commercial and industrial applications; Schedule 80 is specified when higher working pressures are required.
Can galvanized pipe be used for gas lines?
Galvanized pipe is generally not recommended for natural gas distribution. Over time, zinc flakes can detach from the internal surface and clog gas regulators, valves, and burner orifices. Black steel pipe (ASTM A53 without zinc coating) is the industry standard for gas lines. Contact our team for the correct specification.
Does MetalFromTurkey manufacture galvanized pipe?
MetalFromTurkey is a steel trading company, not a manufacturer. We source galvanized steel pipe through certified partner mills in Turkey and coordinate independent quality assurance, full documentation (EN 10204 3.1 MTC), and door-to-door logistics under one point of contact. This model gives buyers access to multiple mills, benchmarked pricing, and independent quality control.
Request a Quote
Prompt Response
Tell us your requirements and our team will respond with a detailed proforma invoice promptly — including pricing, lead time and delivery options.
About Galvanized Steel Pipe
What Is Galvanized Steel Pipe?
Galvanized steel pipe is carbon steel pipe coated with a layer of zinc through a hot-dip galvanizing process. The zinc coating provides a dual-protection mechanism: first, a physical barrier that isolates the steel from moisture and oxygen, and second, sacrificial cathodic protection where zinc corrodes preferentially before the underlying steel. Even when scratched or nicked during transport, the zinc layer continues to protect exposed steel within approximately 6 mm of the damaged area.
According to ASTM A53, galvanized steel pipe is produced in two grades (A and B) and is used widely in water distribution, fire suppression, structural applications, and industrial piping systems. MetalFromTurkey supplies hot-dip galvanized steel pipe through certified Turkish mills with independent quality assurance at every stage — from raw material verification to pre-shipment inspection.
The base material is low-carbon steel conforming to ASTM A53. The most common production method is ERW/HFW welding, though seamless options are available for critical-service applications. The zinc coating is applied using a molten zinc bath of ≥ 98% purity per ASTM B6, creating a metallurgical bond between zinc and steel that outperforms any painted or spray-applied coating.
Hot-Dip Galvanizing (HDG) Process
Hot-dip galvanizing involves immersing prepared steel pipe in a molten zinc bath at approximately 450 °C, creating a metallurgical Zn–Fe alloy bond with an adhesion strength of approximately 3,600 psi. The process includes degreasing, acid pickling, rinsing, fluxing, zinc immersion, withdrawal/cooling, and final inspection.
The resulting coating consists of four distinct zinc-iron alloy layers: Gamma (Γ) with 75% Zn / 25% Fe and ~250 DPN hardness, Delta (δ) with 90% Zn / 10% Fe, Zeta (ζ) with 94% Zn / 6% Fe, and the outer Eta (η) layer of 100% pure zinc providing sacrificial cathodic protection. The Gamma, Delta, and Zeta layers are harder than the underlying steel itself — this is why HDG pipe resists handling damage during transport and installation.
HDG vs Electro-Galvanized vs Pre-Galvanized
| Feature | HDG (Hot-Dip) | Electro-Galvanized | Pre-Galvanized |
|---|---|---|---|
| Zinc thickness | 45–120 µm | 3–30 µm | 20–30 µm |
| Bond type | Metallurgical (Zn-Fe alloy) | Mechanical (electrolytic) | Mechanical |
| Service life (C3 urban) | 40–100 years | Months to years | 5–15 years |
| Weld seam coverage | Full — all surfaces | Full | None — weld seam bare |
| Lifecycle cost | Lowest | Highest | Medium |
| Best for | Outdoor, structural, water, fire | Appliances, aesthetics, indoor | Indoor HVAC, light-duty |
For outdoor, structural, and any wet-environment application, HDG is the standard. MetalFromTurkey supplies exclusively hot-dip galvanized pipe through dedicated HDG lines at our partner mills.
Schedule 40 Galvanized Pipe Dimensions (ASTM A53)
| NPS | DN | OD (mm) | Wall (mm) | Weight (kg/m) |
|---|---|---|---|---|
| ½" | 15 | 21.3 | 2.77 | 1.27 |
| ¾" | 20 | 26.7 | 2.87 | 1.69 |
| 1" | 25 | 33.4 | 3.38 | 2.50 |
| 1¼" | 32 | 42.2 | 3.56 | 3.39 |
| 1½" | 40 | 48.3 | 3.68 | 4.05 |
| 2" | 50 | 60.3 | 3.91 | 5.44 |
| 2½" | 65 | 73.0 | 5.16 | 8.63 |
| 3" | 80 | 88.9 | 5.49 | 11.29 |
| 4" | 100 | 114.3 | 6.02 | 16.07 |
| 5" | 125 | 141.3 | 6.55 | 21.77 |
| 6" | 150 | 168.3 | 7.11 | 28.26 |
| 8" | 200 | 219.1 | 8.18 | 42.56 |
| 10" | 250 | 273.1 | 9.27 | 60.31 |
| 12" | 300 | 323.8 | 10.31 | 79.73 |
Non-standard diameters and cut lengths are available as made-to-order through our partner mills.
Schedule 80 Galvanized Pipe Dimensions (ASTM A53)
| NPS | DN | OD (mm) | Wall (mm) | Weight (kg/m) |
|---|---|---|---|---|
| ½" | 15 | 21.3 | 3.73 | 1.62 |
| ¾" | 20 | 26.7 | 3.91 | 2.20 |
| 1" | 25 | 33.4 | 4.55 | 3.24 |
| 1¼" | 32 | 42.2 | 4.85 | 4.47 |
| 1½" | 40 | 48.3 | 5.08 | 5.41 |
| 2" | 50 | 60.3 | 5.54 | 7.48 |
| 2½" | 65 | 73.0 | 7.01 | 11.41 |
| 3" | 80 | 88.9 | 7.62 | 15.27 |
| 4" | 100 | 114.3 | 8.56 | 22.32 |
| 5" | 125 | 141.3 | 9.53 | 30.94 |
| 6" | 150 | 168.3 | 10.97 | 42.56 |
| 8" | 200 | 219.1 | 12.70 | 64.64 |
| 10" | 250 | 273.1 | 15.09 | 95.98 |
| 12" | 300 | 323.8 | 17.48 | 132.04 |
Schedule 80 provides higher pressure capacity with the same OD as Schedule 40 — only wall thickness and weight differ.
Compatible Fittings & Connections
Connection methods for galvanized steel pipe systems:
- Threaded (NPT) — Most common for NPS ½" to 4". Tapered threads per ASME B1.20.1 with thread sealant.
- Grooved (Mechanical) — Roll groove with gasket coupling. Faster installation, common in fire sprinkler and HVAC systems.
- Flanged — For large-diameter connections and where disassembly is needed. Standard facings per ASME B16.5.
When connecting galvanized pipe to copper or brass fittings, always install a dielectric union at the transition point to prevent galvanic corrosion. MetalFromTurkey can supply compatible fittings through our partner network.
Prohibited Uses
The following applications are not recommended for galvanized steel pipe:
- Natural gas lines — Zinc flakes can clog regulators, valves, and burner orifices. Use black steel pipe (ASTM A53 black).
- pH < 6 or pH > 12 environments — Zinc dissolves rapidly at extreme pH. Consider stainless steel pipe instead.
- Direct contact with copper/brass — Galvanic corrosion at the junction unless dielectric union is installed.
- Temperatures above 200 °C — Zinc produces toxic fumes at elevated temperatures. Use alternative coatings or alloy pipe.
Applicable Standards
All galvanized steel pipes we supply are produced and tested in accordance with these standards:
- ASTM A53 — Primary US/international standard for black and hot-dip galvanized welded and seamless pipe
- ASTM A795 — Fire sprinkler pipe — UL Listed / FM Approved (not interchangeable with A53)
- EN 10255 — EU standard for non-alloy steel tubes in Light, Medium, and Heavy series
- ISO 1461 — Hot-dip galvanized coating thickness requirements
- BS 1387 — Historical British standard, superseded by EN 10255 — still referenced by many international buyers
- DVGW — German gas and water certification — required for legal installation in Germany
All pipes are supplied with Mill Test Certificates per EN 10204 3.1 documenting chemical composition, mechanical properties, dimensional inspection, and zinc coating weight results.