Large Size Welded Carbon Steel Square Pipe 150 mm to 200 mm Tube for Steel Structure Columns Bridge Projects and Heavy Duty Industrial Support

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Product Description

📊 Basic Information
Material
Carbon Steel
Surface Treatment
Hot-DIP Galvanizing, Epoxy Coating
Usage
Oil/Gas, Machinery, Construction
Section Shape
Round / Square
MOQ
1 Ton
Delivery Time
7-10 Days
Free Samples
Yes
Certification
ISO 9001, CE, OCTG, GB/T 3091
Origin
China
Production Capacity
60,000 Tons/Year
🛠 Product Overview

Welded & Seamless Carbon Steel Pipes available in round and square shapes. Our products are engineered for high-pressure environments and heavy-duty industrial support.

Welded Carbon Steel Square Pipe
  • Material Advantages: High-strength Q195/Q235/Q345 or ASTM A53/A106 carbon steel with strong impact resistance.
  • Advanced Technology: High-frequency welding (ERW), submerged arc welding (LSAW), and seamless cold-drawn processes.
  • Anti-corrosion: Optional hot-dip galvanizing, epoxy coating, or spray painting for extended service life.
  • Quality Assurance: 30%-50% lower cost than many seamless alternatives with full international certifications.
📋 Technical Specifications

1. Welded Carbon Steel Round Pipe

ParameterSpecification RangeCommon SizesStandard
OD10mm-2000mm21.3mm, 48mm, 114mmGB/T 3091, ASTM A53
Wall Thickness0.8mm-20mm2.0mm, 3.6mm, 6.0mmEN 10219, JIS G3444
Length1m-12m (Up to 18m)6m, 12m-
MaterialQ195, Q235B, Q345BASTM A36, SS400-

2. Seamless Carbon Steel Round Pipe

ParameterSpecification RangeCommon SizesStandard
OD6mm-800mm25mm, 60mm, 168mmGB/T 8163, ASTM A106
Wall Thickness1mm-50mm3mm, 8mm, 12mmDIN 2448, OCTG
Length3m-12m (Up to 15m)5.8m, 11.8m-
Material20#, 45#, 16MnASTM A53 Gr.B, ST52-

3. Welded Carbon Steel Square Pipe

ParameterRangeStock SizesStandardFeature
Side Length10×10mm - 500×500mm20×20mm, 50×50mmGB/T 6728, ASTM A500Internal deburring
Wall Thickness0.8mm-20mm1.5mm, 3.0mmJIS G3463, EN 10219Flat weld seam
Length1m-12m6m, 12m-±1mm tolerance
🏢 Industry Applications
IndustrySpecific Applications
ConstructionBuilding frameworks, scaffolding, guardrails, roofing supports.
Oil & GasLow-pressure pipelines, casing pipes, water injection lines (OCTG compliant).
Water SupplyMunicipal drainage, fire sprinkler systems, irrigation pipes.
MechanicalConveyor rollers, hydraulic cylinders, truck chassis components.
AgricultureGreenhouse frames, livestock fencing, grain storage bins.

Customization service: Flexible sizing supports OD 10mm-2000mm, wall thickness 1mm-50mm, and lengths up to 12m.

📦 Main Product Categories
Main Products Display
🏭 Workshop & Production

Drawing on over forty years of successful steel trading experience, we are committed to developing a comprehensive supply chain encompassing metal trading, warehousing, logistics, and processing. We provide one-stop solutions for global manufacturing, infrastructure, and construction industries.

Company Overview Workshop Equipment
🌍 Exhibitions & Global Customers
Exhibition Photo 1 Exhibition Photo 2
📜 Certifications & Shipping
Product Certifications Packaging and Shipping
❓ Frequently Asked Questions
How long has your company been established?
Our company was established in 2009 and holds full rights for international export.
Do you have a factory and can I visit?
We have our own machining center and large-diameter pipe factory. We can provide production videos and photos, and customers are always welcome to visit our facilities.
What certifications do your products hold?
We meet international standards including ISO, CE, RoHS, GB, EN, JIS, and Australian Standards.
What is the MOQ and lead time?
Minimum order quantity is typically 1 ton. For stock items, delivery takes 2-3 days. Custom orders generally require 7-15 days depending on specifications.
What payment methods are accepted?
We accept various payment methods including TT, LC, PayPal, and West Union.
Do you offer customization for special sizes?
Yes, we support customized outer diameters (10mm-2000mm), wall thickness (1mm-50mm), and specific lengths (1m-12m) to meet project requirements.

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