Pultruded FRP Square/Rectangular Tube
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Pultruded FRP Square/Rectangular Tube

  • ZZ-00027
  • Zhongzheng or as per your demand
  • 3916909000

                                                                     Pultruded FRP Square/Rectangular Tube

General Introduction

Pultruded FRP Square/Rectangular Tube is not only widely used in our daily life, also used in a variety of insulation, mechanical structural components and other structural components. And with a uniform color inside and outside, and the color can be customized according to the customer’s requirements to adapt to the environment.

Round Tube Specification

Legend Model Dimension(mm) Weight(kg/m)



Square Tube ST25A

25*25*2.8*2.8 0.50
Square Tube ST25B 25*25*3.2*3.2 0.53
Square Tube ST25C 25*25*6.4*6.4 0.90
Square Tube ST32 32*32*6.4*6.4 1.24
Square Tube ST38A 38*38*3.2*3.2 0.85
Square Tube ST38B 38*38*5.0*5.0 1.25
Square Tube ST38C 38*38*6.4*6.4 1.54
Square Tube ST44A 44*44*3.2*3.2 1.01
Square Tube ST44B 44*44*6.4*6.4 1.83
Square Tube ST50A 50*50*3.2*3.2 1.14
Square Tube ST50B 50*50*3.5*3.5 1.24
Square Tube ST50C 50*50*4.0*4.0 1.42
Square Tube ST50D 50*50*5.0*5.0 1.74
Square Tube ST50E 50*50*6.4*6.4 2.12
Square Tube ST54A 54*54*3.2*3.2 1.24
Square Tube ST54B 54*54*4.8*4.8 1.78
Square Tube ST60A 60*60*5.0*5.0 2.10
Square Tube ST64A 64*64*3.2*3.2 1.48
Square Tube ST64B 64*64*4.4*4.4 1.97
Square Tube ST64C 64*64*6.4*6.4 2.80
Square Tube ST76A 76*76*3.2*3.2 1.77
Square Tube ST76B 76*76*5.0*5.0 2.70
Square Tube ST76C 76*76*6.4*6.4 3.39
Square Tube ST101A 101*101*5.0*5.0 2.38
Square Tube ST101B 101*101*5.0*5.0 3.61
Square Tube ST101C 101*101*6.4*6.4 4.61
Square Tube ST152A 152*152*6.4*6.4 7.10
Square Tube ST152B 152*152*9.5*9.5 10.4
Square Tube ST152C 152*152*12.7*12.7 13.5
Square Tube STR25 25*25*3.175*3.175 0.7
Handrail Type U 62*59*4.5 1.50
Handrail Type U 62*60*5.0 1.70
Square Tube (Handrail) STH50 50*50*6.4*5.0 3.0

Rectangular Tube Specification

Legend Model Dimension(mm) Weight(kg/m)



Rectangular Tube FT50A 51*25*3.0*3.0 0.79
Rectangular Tube FT50B 51*25*6.4*6.4 1.54
Rectangular Tube FT51A(stair) 51*25*4.0*4.0 1.01
Rectangular Tube FT51B(stair) 51*38*4.0*4.0 1.22
Rectangular Tube FT52(stair) 52*35*5.0*5.0 1.41
Rectangular Tube FT80 80*60*5.0*5.0 2.5
Rectangular Tube FT91A 91*38*4.0*4.0 1.78
Rectangular Tube FT112A 112*91*6.4*6.4 4.46
Rectangular Tube FT120 120*45*3.0*3.0 2.0
Rectangular Tube FT175 175*50*9.0*9.0 7.0


1. High strength and Light weight

2. No deformation

3. High temperature resistant

4. Low water absorption

5. Strong corrosion resistance

6. Other Excellent Performance

Pultrusion Technique
Pultrusion is a continuous process using fiber reinforcements with thermosetting resin matrices. Pre-selected reinforcement materials, such as fiberglass roving, mat, woven fabrics or stitched fabric, are drawn through a resin bath in which all material is thorougly impregnated with a liquid thermosetting resin. Typical resins include polyesters, vinyl esters and phenolics. The wet-out fiber is formed to the desired geometric shape and pulled into a heated steel die. Once inside the die, the resin cure is initiated by controlling precise elevated temperature. The laminate solidifies in the exact cavity shape of the die, as it is continuously pulled by the pultrusion machine. Most any constant cross-section part can be pultruded.

Pultrusion Process 



  600 251

                                600 449

                                600 449 2

Company Profile
Ningbo Zhongzheng steel grating Co. Ltd. is a professional enterprise in R & D., design, steel grating, SMC grating field. With innovative and pragmatic, scientific developing philosophy, following the criterion of ISO9001, it provides steel grating, stair tread, compound steel grating, fiberglass grating, drainage pit/trench cover, railing & stanchion, etc. It products are widely used in petroleum, chemical industry, environmental protection, power plants, pharmaceutical, printing and dyeing, brewing water supply and drainage, transportation and other industries.
With its ten years of professional management experience and production in press welding steel grating, it is one of the few enterprises who have the technology of flat steel and galvanized steel grating in the industry. The plentiful resources, skilled team, and high level of management, make it be the fastest developed, most potential grating products supplier.
Ningbo Zhongzheng steel grating Co., Ltd strictly followed the brand management of "quality making value, innovation leading the future", to provide clients high quality assurance, drawing, mechanics calculation, data collation service. With high-quality products and services combined, it has been well recognized by clients all over the world. The products have been exported to different countries and regions, such as South Korea, Singapore, Thailand, Australia, France, Kenya, etc.
TEL.: 86-574 8388 8317
FAX: 86-574 8388 8317
ATTN.: Bruce



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