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YTDR SCH40 21.3mm Pre-Galvanized Hollow Section Iron Steel Tubes
YTDR Group's SCH40 21.3mm Pre-Galvanized Hollow Section Iron Steel Tubes are manufactured using advanced high-frequency electric resistance welding (ERW) technology, complying with ASTM A500 standards. These tubes combine exceptional structural strength with long-term corrosion resistance, making them ideal for demanding applications in construction structures, machinery manufacturing, and pipeline systems. Through precise dimensional control and uniform zinc coating protection, the product ensures lasting stability in various environments.
Key Advantages & YTDR's Exclusive Value:
1. High-Strength Structural Design
● SCH40 standard wall thickness increases load-bearing capacity by 35%, suitable for high-stress structural applications
● 21.3mm (1/2 inch) standard diameter with precision tolerance control (±0.13mm) ensures installation compatibility
● High-frequency ERW technology achieves weld seam strength reaching over 95% of the base material
2. Long-Term Corrosion Protection
● Proprietary "Uniform Zinc-Iron Alloy Layer" technology provides zinc coating adhesion up to 150g/㎡
● Metallurgical bond between zinc coating and base material improves anti-peeling performance by 50% compared to conventional processes
● Passes ISO 9224 accelerated corrosion testing with expected service life of 20-25 years in C3 environments
3. Ready-to-Install Design
● Pre-galvanized surface allows direct processing including welding and bending
● Tube straightness tolerance ≤1.5mm/m ensures 30% improvement in installation efficiency
● Standard 6-meter lengths with support for custom cutting services
Contact YTDR Group today for a competitive quote and expert technical support for your next project.
Service Life & Maintenance Guide
Expected Service Life:
● C1/C2 Environments (Indoor dry/Low humidity): Over 30 years
● C3 Environments (Urban/Industrial areas): 20-25 years
● C4 Environments (Coastal/Industrial areas): 15-20 years
(Data based on ISO 12944 standard testing environment)
Professional Maintenance Recommendations:
● Regular Inspection: Visual surface condition check recommended every 24 months
● Cleaning Care: Clean with neutral detergent (pH 6-8) and soft cloth
● Damage Repair: Use specialized repair paint with zinc content ≥92% if base material is exposed
● Avoid Contact: Prevent direct contact with dissimilar metals (copper, aluminum) to avoid galvanic corrosion
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Coating Type |
Typical Coating Mass (g/m²) |
Equivalent Thickness (µm) |
Primary Use |
|
Pre-Galvanized |
60 - 120 |
4 - 8 |
Base material for fabrication, indoor/benign outdoor use |
|
Hot-Dipped Galvanized |
200 - 600+ |
30 - 85+ |
Long-term outdoor exposure, harsh environments |
YTDR Group Value-Added Services
Quality Assurance System
● Full-process quality tracking: 100% traceability from raw materials to finished products
● Third-party certification: Intertek/SGS test reports provided for each batch
● Performance guarantee: Quality certificates covering material properties and dimensional tolerances
Customization Services
● Size Customization: Support for special wall thicknesses and non-standard diameters
● Process Customization: Differential zinc coating thickness solutions based on project requirements
● Logistics Solutions: Professional anti-rust packaging + container optimization loading plans
Technical Support
● Free material selection guidance and technical consultation
● On-site installation support and problem diagnosis
● Regular industry application cases and technical updates
● American Standard (ASTM): Gr. A, B, C, etc.
● European Standard (EN): S235, S275, S355, S420, S460, etc.
● Japanese Standard (JIS): SS400, STKR400, STKR490, etc.
● Chinese Standard (GB): Q195, Q235, Q355, etc.
● Canadian Standard (CSA): 300W, 350W, etc.
At Yuantai Derun, we take pride in delivering premium square steel pipes. To let you experience our excellence firsthand, we’re pleased to provide free samples (up to 20 cm in length), shipped directly to you via express air freight—with only the shipping cost on your end.
Why hesitate? Put our materials to the test and discover why Yuantai Derun stands out in quality and reliability. Request your sample today!
Yuantai Derun square steel pipes also provide cutting, punching, and heat treatment services to meet customers' needs for gas cutting, punching, and thermal assistants. Contact us immediately and send us your processing requirements.
Yuantai Derun Square Steel Pipes – Quality Assured at Every Stage
From raw material sourcing to finished products, Yuantai Derun implements rigorous quality control at every step. We exclusively use traceable raw materials from reputable manufacturers, subjecting them to comprehensive inspections, including but not limited to:
●Dimensional & Visual Checks (appearance, size, straightness)
●Mechanical Testing (impact resistance, yield & tensile strength, hardness)
●Material Analysis (chemical composition, metallographic examination)
●Non-Destructive & Corrosion Testing (UT inspection, salt spray testing)
Contact us today to discuss your specific testing requirements—we ensure precision and reliability in every pipe.
|
Product Description |
|
|
Brand |
Yuantai Derun Steel Pipe Manufacturing Group |
|
Outer Diameter |
10*10-1000*1000mm 10*15-800*1200mm
|
|
Wall Thickness |
0.5-60mm
|
|
Length |
12 m(39.37ft), 6m(19.69ft), 6.4M(21.00ft)
|
|
Tolerance |
±5%, ±10% as required |
|
Shape |
Square / Rectangular
|
|
Standards |
Hollow section: ASTM A500/A501,EN10219,EN10210 |
|
Grade |
10#, 20#, 45#, 16Mn, Q235, Q345, Q195 |
|
Surface Treatment |
Galvanized Coating |
|
Zinc Coating |
60-120g/m2 |
|
Special Pipe |
API Pipe, Other, EMT Pipe, Thick Wall Pipe |
|
Certificate |
CE,LEED,BV,PHD&EPD,BC1,EN10210/10219, ISO9000/14001/45001,DNV,ABS,JIS G3466 |
|
Application |
1. Fence, greenhouse, door pipe,greenhouse. 2. Low pressure liquid, water, gas, oil, line pipe. 3. For both indoor and outdoor the building construction. 4. Widely used in scaffolding construction which is much cheaper and convenient. |
|
MOQ |
2-5 Tons or No minimum order |
|
Delivery Time |
7-15 days |
|
Samples |
Free Samples Get Free Sample Now! |
