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High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
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High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory
High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory

High-Quality Construction Pipe 50*50mm 4x4 Square Tubing Square Pipe 20mm Metal Square Tube for Steel Fence post Suppliers, Factory

A square tube is a long bar of steel that has a hollow interior. It got its name from its square cross-section. Since it's made of steel, it's highly durable. It's likewise resistant to corrosion, rust, and stains. These tubes can even withstand acid, salt water, and chemical exposure.

This type of tube is divided into two categories — seamless steel pipes and welded steel pipes. As its name suggests, a seamless steel pipe has a smooth and unobstructed composition and lacks any welds on the surface. Meanwhile, a welded steel pipe has a bent steel plate that is welded into a square shape, creating a seam on the pipe’s body.

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Product Description

Square / Rectangular Tube Overview

◈
Pre-galvanized Tube: Made directly from hot dipped galvanized steel strips.
◈
Hot Dipped Galvanized: Features a thicker zinc coating. Black tubes are dipped into a zinc pool for superior protection.
◈
Electro Galvanized: Technology similar to hot dipped but with a thinner zinc coating layer.
◈
Painted Tube: Rust removal and oil cleaning followed by precision color painting.

Manufacturing Standards & Steel Grades

Technical Standards:
  • GB/T6728:2002
  • ASTM A500
  • JIS G3466
  • EN10210 / EN10219
Steel Grades:
  • Q195, Q235, Q345
  • GR. A, GR. B, GR. C, GR. D
  • SS440, SS540
  • S235JR, S275JR, S355JR, S355J2H

Square Tube Specifications

Size (mm) WT (mm) Size (mm) WT (mm) Size (mm) WT (mm) Size (mm) WT (mm)
10x100.6-0.842x421.2-6.090x902.5-6.0150x1504.0-8.0
12x120.6-0.845x451.2-6.095x952.5-6.0160x1604.0-8.0
13x130.6-2.048x481.2-6.0100x1002.5-6.0180x1804.0-8.0
15x150.7-2.050x501.5-6.0105x1052.5-6.0200x2005.0-10.0
16x160.7-2.055x551.5-6.0110x1103.0-6.0220x2208.0-25.0
20x201.0-3.060x601.5-6.0115x1153.0-6.0250x2508.0-25.0
25x251.0-3.065x652.0-6.0120x1203.0-6.0280x2808.0-25.0
30x301.2-4.070x702.0-6.0125x1253.0-6.0300x3008.0-25.0
35x351.0-4.075x752.0-6.0130x1303.0-6.0350x3508.0-25.0
38x381.0-5.080x802.5-6.0135x1354.0-14.0400x4008.0-25.0
40x401.0-6.085x852.5-6.0140x1404.0-8.0450x4508.0-25.0
------500x5008.0-25.0

Common Uses & Features

The resistance of square tubes gives them a wide scope of outdoor applications. Their hollow interior makes them excellent for transporting fluids like gasoline, water, and other petroleum products.

Despite their robust structure, these tubes are relatively light and can be bent to accommodate different use cases. They’re also essential components in the production of certain equipment, mechanical parts, and industrial infrastructure.

Rectangular Tube Specifications

Size (mm) WT (mm) Size (mm) WT (mm) Size (mm) WT (mm) Size (mm) WT (mm) Size (mm) WT (mm)
20x100.7-2.070x251.2-6.0100x902.0-6.0130x502.0-6.0150x1102.0-6.0
20x140.7-2.070x301.2-6.0110x252.0-6.0130x602.0-6.0150x2503.0-12.0
20x150.7-2.070x401.2-6.0110x302.0-6.0130x702.0-6.0150x3002.0-6.0
26x130.7-2.070x502.0-6.0110x402.0-6.0130x802.0-6.0160x402.0-6.0
30x100.7-2.070x602.0-6.0110x502.0-6.0130x902.0-6.0160x502.0-6.0
30x150.7-2.080x201.2-4.0110x602.0-6.0130x1002.0-6.0160x602.0-6.0
30x200.8-2.080x251.2-6.0110x702.0-6.0130x1102.0-6.0160x702.0-6.0
40x100.8-2.080x301.2-6.0110x802.0-6.0130x1202.0-6.0160x802.0-6.0
40x151.0-2.080x401.2-6.0110x902.0-6.0140x302.0-6.0160x902.0-6.0
40x201.0-2.580x502.0-6.0110x1002.0-6.0140x402.0-6.0160x1002.0-6.0
50x401.0-3.090x702.0-6.0120x802.0-6.0140x1202.0-6.0190x602.0-6.0
60x401.2-6.0100x502.0-6.0120x1404.0-6.0150x702.0-6.0200x1003.0-13.0

Wide Range of Applications

  • Cookware and food processing equipment
  • Architectural wall paneling
  • Exterior railings and bracket trims
  • Quarrying and water filtration systems
  • Heat exchangers & Mining screens
  • Chemical repositories
  • Heavy duty springs
  • Petroleum pipelines
Tube Application Example

Frequently Asked Questions

1. What is the main difference between pre-galvanized and hot-dipped galvanized tubes?
Pre-galvanized tubes are manufactured using steel strips that are already galvanized, while hot-dipped galvanized tubes involve dipping the finished black tube into a zinc pool, resulting in a significantly thicker and more durable zinc coating.
2. Which international standards do your square and rectangular tubes follow?
Our products comply with major global standards including ASTM A500 (USA), GB/T6728 (China), JIS G3466 (Japan), and EN10210/EN10219 (Europe).
3. Are these tubes suitable for fluid transportation?
Yes, the hollow interior of both square and rectangular tubes makes them excellent choices for transporting gasoline, water, and various petroleum products.
4. What steel grades are available for architectural use?
Commonly used grades for architectural and structural applications include Q235, Q345, ASTM GR.B, and S235JR or S355JR, depending on the required strength and environmental conditions.
5. Can these steel tubes be customized with color?
Yes, we offer painted square and rectangular tubes. The process includes thorough cleaning and rust removal before applying the required color paint to meet specific aesthetic or protective needs.
6. What size ranges do you offer for square tubes?
We provide a wide range of sizes from small 10x10mm tubes with 0.6mm thickness up to large structural 500x500mm tubes with wall thicknesses up to 25.0mm.

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