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China Pre Zinc Coated Schedule 80 Steel Pipe Q235 GI Pipe Structure Square Steel Pipes

1-99 Metric Tons
>=100 Metric Tons
Min. Order
1 Metric Ton
Choose your specifications
Company Information

Changsha Jetsun Trade Development Co., Ltd.

CN Trading Company
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Quick Details

Standard: API,ASTM,BS,GB
Standard2: API 5L,ASTM A513-2007,BS 1139,GB/T 8163-1999,GB/T 3639-2000,GB/T 17396-1998
Grade Group: 10#-45#,API J55-API P110,Q195-Q345,ST35-ST52
Grade: 10#,20#,45#,API J55,Q235,Q345,ST35
Thickness: 2 - 120 mm
Section Shape: Square
Place of Origin: Hunan China
Application: Oil Pipe
Technique: ERW
Certification: API
Surface Treatment: anti-rust olied
Special Pipe: API Pipe
Alloy Or Not: Non-alloy
Secondary Or Not: Non-secondary
Product name: Square Steel Pipes
Manufacture Type: seamless steel pipe ,welding steel pipe
Standard: API 5L,ISO3183
Fastener type of welding steel pipe: UOE,JCOE
Pressure class: PLS 1,PLS 2,PLS 3
Type of End: Plain-end, threaded end, the socket end,bevelled ends
Connection: Welding,Coupling connection,Socket connection
Application: Transport petroleum, natural gas, oil, and water
Length: 5.8-12m
Selling Units: Single item
Single package size: 80X50X70 cm
Single gross weight: 66 KG
Package Type: Square Steel Pipes Packing : Packed in bundle and then in container.

China Pre Zinc Coated Schedule 80 Steel Pipe Q235 GI Pipe Structure Square Steel Pipes

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Specification table of China Pre Zinc Coated Schedule 80 Steel Pipe Q235 GI Pipe Structure Square Steel Pipes

Product name China Pre Zinc Coated Schedule 80 Steel Pipe Q235 GI Pipe Structure Square Steel Pipes
TechniqueLongitudinal Electronic Resistance Welding (ERW)
High Frequence Welding (HFW)
Material QualitySteel GradeQ195 Q215 Q235 Q345, etc.
Material TypeAvailable in cold rolled and hot rolled
Diameter50x50 mm
Length1m-12m or as your requirement
SurfaceGalvanized, 3PE, painting, coating oil, steel stamp, etc.
EndsPlain ends, cutting, threaded with coupling, beveled, flange, etc.

With Chemical Composition and Mechanical Properties Testing; Hydrostatic Test, Dimensional and Visual Inspection, 

With Nondestructive Inspection

CertificationBV, ISO, IAF or as per customer.
Applicationconstruction pipe, structure pipe, Greenhouse pipe, Building material tube, Furniture tube, etc
Trade TermsFOB, CFR, CIF, EXW.
Payment TermsT/T,L/C at sight
30%T/T in advance,balance 70% should be paid after receiving the copy of BL.
Loading PortTianjin Port


Chemical Composition 

Chemical Composition
Mechanical Property
MaterialYield Point(Mpa)Tensile Strength(Mpa)Elongation(%)

How to ensure the quality of square steel pipe?

Do you want to know the details?

Go on.... 

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 Certifications for x-ray inspection 12mm-219mm stainless steel tube.jpg


Applications for China Pre Zinc Coated Schedule 80 Steel Pipe Q235 GI Pipe Structure Square Steel Pipes                                      

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Packing and Delivery                                                                         

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Company Information

Why choose us?

We,Jetsun was established in 2002 , we have over 13 years experience in field of steel tube and pipe fittings, we are a professional supplier of steel products in China.

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Quality Control

Production Line & Relative Test                                                       


We pay attention to every step of manufacturing,  and carefully control evry details from process ,design ,manufacture and test , in order to guarantee superexcellent product .


a Raw material inspection :

dimension and tolerance check, appearance quality check, mechanical properties testing, weight check and raw material's quality assurance certificate check


b Semi-finished goods inspection :

dimension and tolerance check, physical and chemical inspection, leakage magnetism and ultrasonic inspection


c Finished goods inspection :

dimension and tolerance, appperance quality check and mechanical properties testing


d Inspection before ex-factory:

We arrange our QC staff to manufacture’s plant for final quality and packing inspection each time before we deliver goods to port for shipping, and the connected sales staff will be with QC staff to make sure we did everything fully and strictly meet our customers’ requirements


Production Line & Advanced Equipments




According to raw material properties  , different material products will have different maunufacture process  .  To control and guarantee products quality . We will test products in each process of manufactuing .


Testing Equipments





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Our Services

Service : We are pleased to provide you with best services in consulting, purchasing, transportation, installation, and after-sales services.


What can I do for you?


A. Stable quality—with advanced equipments and all raw materials comes from stat-owned mill in China.

B. Competitive price—Not cheapest but the lowest at the same quality.

C. Good service—one-stop service, besides the casing & tubing, we can also other relative steel pipe and pipe fittings to you.

D. Delivery timeon-time delivery, lots of stock for standard size pipes.

E. Customized ,small/trail order and mixed order are welcomed.


Inquiry note

For your convenience and save your time,to quote you with best price,please read the inquiry note and tell us the details as follow.

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