A Rectangular pipe, also known as a rectangular hollow section (RHS), is a type of metal profile with a rectangular cross-section. Unlike round tubes, its flat surfaces make it ideal for a vast range of structural and architectural applications where clean lines, efficient joining, and high strength-to-weight ratios are paramount.

Product Overview

Q195 rectangular pipe is formed through a process of cold drawing and extrusion from Q195 material, resulting in a pipe with a hollow rectangular section. Unlike Welded pipes, it features a seamless construction when produced through specific methods, though it can also be manufactured by welding formed steel strips. The name "Q195" denotes a minimum yield strength of 195 MPa for this carbon steel.

◼️ Key Features and Advantages

Excellent Plasticity and Toughness: Q195 steel offers high ductility, making the rectangular pipe suitable for applications requiring forming and bending without fracturing.

Good Welding Performance: The pipe can be easily welded using common methods, facilitating assembly and construction.

Decent Strength-to-Weight Ratio: Provides reliable structural support while being relatively lightweight, contributing to material efficiency.

Cost-Effective: Q195 material is economical due to its standard composition and efficient manufacturing processes, offering good value.

Variety of Surface Treatments: Can be supplied as bare (black), black painted, galvanized, oiled, or according to customer requirements for enhanced corrosion resistance or specific aesthetics.

Manufacturing Process

The production of rectangular pipe often involves roll forming strips of Q195 steel. Key steps can include:

Uncoiling and Leveling: The steel strip is prepared.

Forming: It is progressively shaped through a series of rolls into a rectangular cross-section.

Welding (For welded pipe): The edges are welded using techniques like High-Frequency (HF) Welding or Submerged Arc Welding (SAW) for larger sizes. HF welding utilizes skin effect and proximity effect for efficient, clean welds without filler material.

Sizing & Straightening: The pipe is calibrated to precise dimensions.

Cutting: Pipes are cut to the required length.

Testing and Inspection: Includes hydrostatic testing, ultrasonic inspection, and X-ray inspection to ensure quality and integrity.

Surface Treatment & Finishing: Applying coatings like galvanization or painting if specified.

◼️ Applications

Q195 rectangular pipes are versatile and used in:

Construction & Decoration: Building structures, frames, roof trusses, fences, gates, decorative elements.

Machinery and Equipment Manufacturing: Frameworks, guards, support structures, conveyor systems.

Automotive and Transportation: Parts for vehicles, trailers, body frames.

General Fabrication: Furniture, racks, storage systems, various fabrications requiring hollow sections.

Utility Projects: Guardrails, signposts, lighting poles.