Hot Rolled Black Steel Square Tube/Rectangular Hollow Tubular Carbon Steel Pipe

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Product Description

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Overview & Basic Info

Model NO.
Customized Size
Type
Welded
Technique
Hot Rolled & Cold Rolled
Material
Carbon Steel
Surface Treatment
Black
Usage
Pipeline Transport, Construction & Decoration
Section Shape
Square
Shape
Rectangular & Square
Thickness
0.40mm-35mm
Tolerance
+/-0.01
HS Code
7306309000
Capacity
50000 Ton Per Year
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Product Description

Production Process of Welded Pipes

1. Material Preparation: Selection of top-tier materials including wide steel strips, hot-rolled steel strips, and cold-rolled steel strips. Selected materials are meticulously cut, leveled, and cleaned.

2. Curling Forming: Expertly shaped into tubes of relatively small diameter using state-of-the-art curling machinery.

3. Welding Process: Advanced high-frequency induction or resistance welding techniques transform curled tubes into long, seamless welded pipes.

4. Steel Annealing: Precise annealing process reduces hardness while alleviating internal stress, enhancing product integrity.

5. Size Cutting: Precisely cut to required lengths tailored to meet specific process requirements.

6. Fine Repair Process: Straightening, trimming, and processing ensuring a flawless finish and optimal performance.

7. Coating Treatment: Outer surface receives a robust coating enhancing corrosion and wear resistance.

Application Fields

Construction Field: Indispensable building materials used in structures, steel frameworks, pipelines, power poles, and highway guardrails.

Automotive Manufacturing: Integral components in crafting frames, chassis, and exhaust systems, offering remarkable strength.

Industrial Manufacturing: Widely utilized in machinery, shipbuilding, and aviation sectors for exceptional strength and corrosion resistance.

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Detailed Photos

Steel Pipe 1
Steel Pipe 2
Steel Pipe 3
Steel Pipe 4
Steel Pipe 5
Steel Pipe 6
Steel Pipe 7
Steel Pipe 8
Steel Pipe 9
Steel Pipe 10
Steel Pipe 11
Steel Pipe 12
Steel Pipe 13
Steel Pipe 14
Steel Pipe 15
Steel Pipe 16
Steel Pipe 17
Steel Pipe 18
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Product Parameters

ShapeRectangular: 20*30-600*800mm; Square: 20*20-600*600 mm
Thickness1.0-35 mm
StandardGB/T3094-2000, GB/T6728-2002, ASTM A500, JIS G 3466, DIN EN 10210
MaterialQ195, Q235, Q345, 20#, 45#, S235, S355, St37, St52, A500, A36
TechniqueHot Rolled, Cold Rolled, ERW, High-frequency welded, Extruded
SurfaceBared, Oil, Galvanized, Paint
CertificationISO9001
UsageMachinery manufacture, Roads and Bridges, Construction, Transportation
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Packaging & Logistics

Packaging
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Company Profile

Established in 2000, our company has specialized in the trade of diverse steel profiles, including angle steel, channel steel, I-beam, H-beam, steel plate, and square tube. We boast an annual inventory of over 10,000 tons, ensuring our ability to fulfill global demands effectively.

Our expansive sales network spans over 100 countries, including the USA, Mexico, Canada, Spain, Russia, and Singapore. Our factory premises cover approximately 70,000 square meters and are equipped with state-of-the-art processing machinery, including shearing machines, straightening machines, and annealing furnaces.

Quality is our priority, certified by international standards such as ISO9001, SGS, JIS, and BV. We offer 7*24 hour online service and full customization to meet exact specifications.

Advantages
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Frequently Asked Questions

What are your payment terms?
We prefer 30% TT before inspection and the remaining 70% against BL. However, payment terms are negotiable to meet mutual requirements.
Which payment methods are accepted?
We accept all secured methods including bank transactions, Trade Assurance, and PayPal.
Is product customization available?
Yes. With expert equipment and highly-trained workers, we are capable of manufacturing highly customized steel products to your specific needs.
Do you provide free samples?
Yes, we provide free samples to our clients and usually cover the shipping costs. Contact us to order your sample.
What materials and grades do you supply?
We supply all grades of steel and stainless steel products, including coils, pipes, bars, and beams, along with copper and aluminum products.
How is product quality ensured?
All products are rigorously tested with Mill Test Certificates (MTC) available. We also support third-party inspections before shipping.

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