SQUARE STEEL TUBE: THE “STEEL SKELETON” OF MODERN CONSTRUCTION AND MANUFACTURING

PRODUCT DETAIL

Product Name
galvanized square rectangular pipe
Out Diameter
square pipe10*10mm-500*500mmas customer request.
rectangular pipe 20*10mm as customer request.
Thickness
Pre galvanized:0.6-2.5mm.
Hot dipped galvanized: 0.8- 25mm.
Zinc coating
Pre galvanized:5μm-25μm
Hot dipped galvanized:35μm-200μm
Type
Electronic Resistance Welded (ERW)
Steel Grade
Q235, Q345, S235JR, S275JR, STK400, STK500, S355JR, GR.B-D
Standard
GB/T6728-2002 ASTM A500 Gr.A.B.C.JIS G3466
Surface Finish
Pre-galvanized, Hot dipped galvanized, Electro galvanized, Black, Painted, Threaded, Engraved, Socket.
International Standard
ISO 9000-2001, CE CERTIFICATE, BV CERTIFICATE
Packing
1.Big OD:in bulk 

2.Small OD:packed by steel strips 
3.woven cloth with 7 slats 
4.according to the requirements of customers
Main Market
Middle East,Africa, Asia and some Uropean country and South America, Australia
Country of origin
China
Productivity
5000Tons per month.
Remark
1. Payment terms : T/T ,L/C 

2. Terms of trade : FOB ,CFR,CIF ,DDP,EXW 
3. Minimum order : 2 tons 
4. Delivery time : Within 25 days.

Function and material

As a high-efficiency profile, square steel tubes are widely used in building structures (such as factories, bridges), machinery manufacturing, furniture and transportation equipment due to their high strength, light weight and easy processing. The four-sided right-angle design not only improves the load-bearing capacity, but also makes it easier to splice and weld, becoming the "invisible pillar" of modern engineering.

 square steel pipe
square Steel Pipe

To cope with corrosion in different environments, square steel pipes often use the following coating processes:

·  Hot-dip galvanizing:  covered with a dense zinc layer, excellent weather resistance, suitable for outdoor buildings;

· Epoxy spraying:  rust-proof and with a variety of colors, often used for indoor equipment;

·  Alu-zinc plating: resistant to high temperature corrosion, suitable for harsh environments (such as chemical plants).

Choosing the right coating can significantly increase the service life of square steel pipes and reduce maintenance costs. As a global supplier, we are committed to providing customers with customized coating solutions to help projects last longer and be more stable.

DETAILS IMAGES

SQUARE STEEL PIPE (10)
SQUARE STEEL PIPE (22)
SQUARE STEEL PIPE (28)
square tube weight
Square Tubes
length test

PACKING & DELIVERY

square steel tubes
Galvanized Square Steel Pipe
galvanized steel pipe

● Waterproof plastic bag then bundle with strip, On the all. 

● Waterproof plastic bag then bundle with strip, On the end.

● 20ft container: not more than 28mt. and the lenath is not more than 5.8m. 

● 40ft container: not more than 28mt. and the length is not more than 11.8m.

PRODUCTS MACHINING

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● All the pipes is high-frequency welded.

● Both inner and outer welded stab can be removed. 

● Special design available according to requirement. 

● Pipe can be necked down and punched holes and so on. 

● Supplying BV or SGS Inspection if client need.

OUR COMPANY

Pre-Galvanized Square Tubes

Tianjin Minjie steel Co.,Ltd was established in 1998. Our factory more than 70000 square meters, just 40 kilometers from XinGang port, which is the biggest port in the north of China . We are a professional manufacturer and exporter for steel products.The main products are pre galvanized steel pipe, hot dip galvanized pipe, welded steel pipe ,square&rectangular tube and scaffolding products.We applied for and received 3 patents.They are groove pipe ,shoulder pipe and victaulic pipe. Our manufacturing equipment include 4 pre-galvanized product lines, 8ERW steel pipe product lines,3 hot-dipped galvanized process lines.According to standard of GB ,ASTM ,DIN ,JIS.The products are under the ISO9001 quality certification.

scaffolding

Annual output of various pipe is more than 300 thousands tons.We had obtained the honor certificates issued by the Tianjin municipal government and Tianjin quality supervising bureau yearly. Our products are widely applied to machinery,steel construction,agricultural vehicle and greenhouse,auto industries,railway,highway fence,container inner structure,furniture and steel fabric. Our company owns the firs class professional technique adviser in China and the excellent staffs with professional technology.The products had been sold to all over the world. We believe that our high quality products and services will be your best choice.Hope get your trust and support.Looking forward to the long term and good cooperation with you sincerely.

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Greenhouse

Post time: Jun-09-2025