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Quick Details

  • Standard: ASTM, BS, GB, ASTM A53M-2007, BS 1387, GB/T 13793-1992
  • Grade: Q195-Q345, Q195, Q215, Q235, Q345, Q195/Q235/Q235B
  • Thickness: 1.2 - 17.5 mm
  • Section Shape: Square
  • Outer Diameter: 20*20 to 500*500
  • Place of Origin: Tianjin, China (Mainland)
  • Secondary Or Not: Non-secondary
  • Application: Structure Pipe, construction
  • Technique: Hot Rolled
  • Certification: ISO certificate
  • Surface Treatment: Can be oiled
  • Special Pipe: Thick Wall Pipe
  • Alloy Or Not: Non-alloy
  • Product name: Black square tube / Hollow section
  • surface: black / can be oiled
  • Sizes: 20mmx20mm to 500mmx500mm
  • Wall Thickness: 1.2mm to 17.7 mm
  • Length: 5.8m / 6 m/12m or customized
  • Package: by bundle or customized
  • Brand Name: hengji

Packaging & Delivery

Packaging Details Export Standard package By bundle or customized.
Delivery Time 30days

Sincere explanation:

1, Our Value Message Is Quality Is Our Culture

2, With Us Your Money In Safe Your Business In Safe

3, Hengji Is Our Core Competencies

4, Competitive Advantage Product

5, Full Refund In Case Of Bad Quality

6, Confidentiality Agree Business Secret Contract

7, Quality Assurance 

8, Free Sample Offer & Small Order Welcomed

9, After Sales Service 24*7

10, Fast Delivery

Product Description

 Black Square Tube /Black Square Pipe / Black Hollow section

Size  OD20*20-200*200
Wall Thickness1.0mm-15mm
SCH30,SCH40,STD,XS,SCH80,SCH160,XXS etc.
LengthLength can be customized,Maximum 12M
Steel materialQ195 → Grade B, SS330,SPHC, S185
Q215 → Grade C,CS Type B,SS330, SPHC
Q235 → Grade D,SS400,S235JR,S235JO,S235J2
Q345 → SS500,ST52
StandardBS EN10296,BS EN10025,BS EN10297,BS6323, BSEN10219,BSEN10217,GB/T13793-1992,GB/T14291-2006 GB/T3091-1993,GB/T3092-1993,GB3640-88
UsageUsed For Structure, Construction, Accessorize
Ends1) Plain
2) Beveled
3) Thread with Coupling or cap
4) Puch holes as per customer's request  ,etc.
End protector1) Plastic pipe cap
2) Iron protector
Surface Treatment1)  Galvanized
2) Color Painted (Black/Red/Varnish coating)
3) Bared
TechniqueElectronic Resistance Welded (ERW )
TypeWelded Pipe
Welded Line TypeLongitudinal
Section ShapeSquare/ Rectangular 
InspectionWith Hydraulic Testing, Eddy Current , Infrared Test
Package1) Bundle
2) In Bulk
3) Water proof  plastic wrap.
4) As per Client's Requirements 
Delivery1) Container
2) Bulk carrier
Port of ShipmentXingang Port,Tianjin, China
Date of DeliveryAccording To The Quantity And Specification Of Each Order

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Company information

    Tianjin HengJi Steel Co., Ltd. Was founded in May 2000. The Factory covers a land area of approx.173,000 sqm with 13 ERW pipe production lines,4 Hot-dipped galvanized pipe production lines with total annual output of 600,000 tons.
    HengJi have strictly implemented the ISO9001-2008 management system and actively develops diversified operations and maintains dose relations with numerous large steel strip suppliers such as HBIS and Guofeng Iron and Steel. The high efficiency management and finest quality of raw material ensure that the quality of Hengji's products is always among the best in the industry.
    HengJi Steel has won wide praises for its good resources advantages, high quality, complete range of product specifications,and abundant source of supply, convenient traffic and perfect after-sale service.

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China (Mainland) | Manufacturer, Trading Company
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