products details

Home Products

Square and Rectangle Welded Steel Pipes Q215 Q235 with Galvanized, Oiled, and Black Surface

Delivery Time:	Within 45 days after receive LC or TT
Payment Terms:	LC/TT

Detail Information

Product Description

Detail Information

Place of Origin:

China

Product Name:

Square / Rectangle Welded Steel Pipes

Pipe Shape:

Square / Rectangle

Manufacturing Process:

ERW Welded

Steel Grade:

Q195 / Q215 / Q235 / SPHC / SPCC / 08Yu / 08Al

Surface Treatment:

Galvanized / Oiled / Black

Length:

5.8M / 6M Or Customized

Length Tolerance:

+50mm

Delivery Time:

Within 45 Days After Receiving LC Or TT

Payment Terms:

LC / TT

Packaging:

Standard Export Packing

Packaging Details:

standard export packing

Highlight:

welded stainless steel pipe

stainless steel pipe fittings

Product Description

Square and Rectangle Welded Steel Pipes Q215 Q235 with Galvanized, Oiled, and Black Surface

1．Product Overview

Square and rectangle welded steel pipes are widely used in steel structures, industrial fabrication, furniture manufacturing, agricultural equipment, storage systems, and general construction applications.

The pipes are available with galvanized, oiled, or black surface finish to support different processing and environmental requirements. Q215 and Q235 steel grades provide stable mechanical performance for structural fabrication and welding applications.

2．Technical Solution

The pipes are manufactured through ERW welding technology to achieve consistent weld seam quality and dimensional stability.

Galvanized surface treatment improves corrosion resistance for outdoor and humid environments. Oiled pipes provide temporary anti-rust protection during transportation and storage. Black steel pipes are suitable for welding, painting, and further fabrication processes.

3．Specifications

Parameter	Value
Product Type	Welded Steel Pipe
Pipe Shape	Square / Rectangle
Manufacturing Process	ERW Welded
Steel Grade	Q195 / Q215 / Q235 / SPHC / SPCC / 08Yu / 08Al
Surface Finish	Galvanized / Oiled / Black
Length	5.8M / 6M or customized
Length Tolerance	+50mm
Packaging	Standard export packing
Payment Terms	LC / TT

4．Size Range

Pipe Type	Size Range	Thickness Range	Size Tolerance	Length Tolerance
Square Pipe	16×16–25.4×25.4mm	0.7–2.0mm	±0.15mm	+50mm
Square Pipe	30×30–50×50mm	1.0–3.0mm	±0.20mm	+50mm
Square Pipe	60×60mm	0.7–2.0mm	±0.15mm	+50mm
Square Pipe	100×100–200×200mm	3.0–6.0mm	±0.60mm	+50mm
Rectangle Pipe	10×20–20×40mm	0.8–1.5mm	±0.20mm	+50mm
Rectangle Pipe	20×40–30×50mm	1.0–2.5mm	±0.25mm	+50mm
Rectangle Pipe	25×70–38.1×76.2mm	1.2–2.5mm	±0.25mm	+50mm
Rectangle Pipe	30×60–40×80mm	1.2–2.5mm	±0.30mm	+50mm
Rectangle Pipe	120×60–150×250mm	3.0–6.0mm	±0.60mm	+50mm

5．Applications

Industry	Typical Applications
Construction	Steel structures, supports, handrails
Industrial Fabrication	Machinery frames and welded assemblies
Furniture	Table frames, chair frames, shelving systems
Agriculture	Greenhouse structures and support frames
Warehousing	Rack systems and storage structures
General Engineering	Structural fabrication and steel framework

6．Processing

The welded steel pipes support cutting, welding, punching, bending, drilling, galvanizing, and painting processes.

Customized length and surface finish can be supplied according to project requirements.

7．Advantages

Advantage	Description
ERW Welded Structure	Stable weld seam and dimensional consistency
Multiple Surface Options	Galvanized, oiled, and black finish available
Wide Size Range	Covers light-duty to structural applications
Good Fabrication Performance	Suitable for welding, bending, and machining
Multiple Steel Grades	Supports structural and forming applications
Export Standard Packing	Suitable for container shipment and export projects

8．How to Choose

Requirement	Recommended Option
Outdoor structural use	Galvanized square or rectangle pipe
Indoor fabrication	Black welded pipe
Temporary anti-rust protection	Oiled welded pipe
General structural fabrication	Q235 steel pipe
Light forming applications	Q195 or Q215 steel pipe
Heavy structure support	Large-size square or rectangle pipe

9．FAQ

Question	Answer
What pipe shapes are available?	Square and rectangle welded steel pipes are available.
What surface finishes can be supplied?	Galvanized, oiled, and black surface finishes are available.
What steel grades are available?	Q195, Q215, Q235, SPHC, SPCC, 08Yu, and 08Al are available.
Can customized length be supplied?	Yes. Customized pipe length is available according to customer requirements.
What industries commonly use these pipes?	Construction, furniture, industrial fabrication, agriculture, warehousing, and general engineering industries.

Tags:

Hot Dipped Galvanized Steel Coils

Hot Dipped Galvanized Steel Sheet

Galvanized Corrugated Roofing Sheet

Prepainted Color Steel Coils

Pre-painted Steel Sheet

Corrugated Steel Roof Sheets

Hot Dipped Galvanized Steel Strip

Cold Rolled Steel Coils

Cold Rolled Steel Strip

Cold Rolled Steel Sheet

Hot Rolled Steel Coils

Checkered Steel Plate

Cold Rolled Stainless Steel coil

Welded Steel Pipes

Seamless Steel Pipes

Mild Steel Products

Laser Cutting Steel Plate

Tinplate Sheet

Arc Welding Electrode

Inconel Bar

Hot Dipped Galvanized Steel Coils

Hot Dipped Galvanized Steel Sheet

Galvanized Corrugated Roofing Sheet

Prepainted Color Steel Coils

Pre-painted Steel Sheet

Corrugated Steel Roof Sheets

Hot Dipped Galvanized Steel Strip

Cold Rolled Steel Coils

Cold Rolled Steel Strip

Cold Rolled Steel Sheet

Hot Rolled Steel Coils

Checkered Steel Plate

Cold Rolled Stainless Steel coil

Welded Steel Pipes

Seamless Steel Pipes

Mild Steel Products

Laser Cutting Steel Plate

Tinplate Sheet

Arc Welding Electrode

Inconel Bar

products details

Square and Rectangle Welded Steel Pipes Q215 Q235 with Galvanized, Oiled, and Black Surface

welded stainless steel pipe

stainless steel pipe fittings

welded stainless steel pipe

stainless steel pipe fittings

welding steel pipe

Hollow Section Galvanized Welded Steel Pipes GB/T13793 GB/T3091 GB/T6728 GB/T6725

Round, Square, Rectangle Galvanized or Oiled ERW Welded Steel Pipe / Pipes