FRP Square Tube

Product Overview

The FRP square tube is a square-section profile made continuously by pultrusion from fiberglass roving and resin, and it is a base material for building FRP structures. The section is dimensionally accurate and the surface is smooth. The tube offers high strength, low weight, corrosion resistance and electrical insulation, and it meets the requirements of many structural applications. Compared with a conventional metal square tube, an FRP square tube needs no protective coating, does not rust in damp or corrosive conditions over long service, and carries low maintenance cost. It can be sawn, drilled and assembled, is easy to work, and is widely used in industrial and civil building structures as an economical and dependable alternative to metal profiles.

The FRP square tube is dense in structure and stable in performance, and quality is consistent from batch to batch, which suits volume purchasing and project use. Wall thickness and section size can be selected for the load case, so the design is flexible and meets varied structural requirements, which makes engineering and construction easier.

Technical Specifications

Common square tube sizes range from 20 × 20 mm to 100 × 100 mm, with wall thickness from 2 mm to 8 mm, and lengths are supplied cut to project requirements. Different resin systems are available for flame retardant, acid and alkali resistant service. The standard colours are grey and yellow, and other colours can be produced to customer requirements. Mechanical properties are stable, flexural and compressive strength meet structural requirements, the surface is flat and free from twist, and dimensional tolerances are small, which makes later cutting and jointing straightforward.

Straightness is good and the ends are square, which makes cutting and assembly on site easier and reduces waste. Connecting corner pieces, reinforcing pieces and other accessories can be supplied as needed, so customers can build FRP structural systems quickly.

Production and Quality

Square tube is formed continuously on automated pultrusion lines, with fiber content and degree of cure held stable so that properties stay consistent. Before dispatch, section dimensions, straightness and surface quality are checked batch by batch to confirm that the profile has no twist or cracks and meets structural and fabrication requirements. Mechanical properties are sampled batch by batch, the test data is recorded and filed, and a quality inspection report is supplied. Custom sizes and lengths can be produced, and samples can be tested to confirm that the product suits the project.

The company has the capacity for volume production and fast delivery and can meet project requirements for quantity and lead time. Profiles are packed by size with clear markings, which makes acceptance and material management easier for the customer and supports efficient material purchasing.

Applications

FRP square tube is used for FRP frames, equipment supports, walkway platforms, guardrail posts, grating frames and livestock pens. With angle, channel and other profiles it forms a complete FRP structural system. Its corrosion resistance and freedom from maintenance suit chemical plants, water treatment and marine environments in particular, and they extend the service life of the structure. Hebei Zhengche Trading Co., Ltd. supplies FRP profiles and matching connectors and can equip a structural project with materials from one source.

In industrial buildings and environmental protection facilities, FRP square tube is a dependable alternative to metal profiles thanks to its corrosion resistance and consistent quality. With a complete product range and professional service, the company continues to supply structural material solutions to its customers.