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Steel Pipes
  • Black Steel Pipe Manufacturers, Black Steel Pipe Factory, Supply Black Steel Pipe
  • Black Steel Pipe Manufacturers, Black Steel Pipe Factory, Supply Black Steel Pipe
  • Black Steel Pipe Manufacturers, Black Steel Pipe Factory, Supply Black Steel Pipe

Black Steel Pipe


Product origin :Tangshan city, CHINA

Delivery time :Within 30 days

Supply capacity :5000MT perMonth

Welded steel pipes for low-pressure fluid transportation (GB/T3092-1993) are also known as general welded pipes, commonly known as black pipes. It is a welded steel pipe used for conveying water, gas, air, oil, heating steam and other general low pressure fluids and other purposes. The wall thickness of steel pipe can be divided into ordinary steel pipe and thickened steel pipe, and the nozzle end can be divided into non-threaded steel pipe (smooth pipe) and threaded steel pipe.

1. Product Description

Pre-Galvanized Steel Pipe is widely application in construction, pipe of industrial, water pipe, fence equipment, telecommunication tubes as well as greenhouse tubes for different planting and breeding business.

2. Product Name: Pre Galvanised steel rectangular pipe , pre Galvanised steel square pipe

3. Material: ASTM A500,EN10219, AS1163, GB/T6728 ,

4. Contificate: ISO9001-2008,CIC,SGS,BV etc

5. Grade: Q195-Q235-Q345/SS330-SS400-SS500/STK290-STK400-STK490-

6. SIZE: 16mm*16mm,20mm*20mm,25mm*25mm,30mm*30mm,40mm*40mm,50mm*50mm,
60mm*60mm,80mm*80mm,100mm*100mm etc as per customer's 

7. Wall Thickness: 0.7mm-2.5mm as per customer's requirement

8. Lenght: 1m-12m as per customer's requirement

9. Welded: Longititude ERW welded

10. Used: Building pipe

steel pipes

Company Information

Our company focuses on the usage, development and research of square and rectangular tubes over the passed 20 years. We purchased three production lines at the cost of over 16 million for expansion of the new factory in 2012.

These production lines make full-sizes of square tubes and rectangular tubes: 20x20mm-600x600mm, 20x30mm-600x800mm, Thickness:1.5mm-35.0mm,over 2800 specifications.

Round steel tubes


After we finish manufacturing,we will inspect steel tubes.

a. Technical Properties:Dimensions,Flattening Test, Bending Degree, Twist,Radius of Corner,We could guarantee all the technical requirements according to standard.

b. We could provide MTC(Including Chemical composition Mechanical property),these could guarantee the material.

c. Welcome our customer to our factory to inspect goods.If you need,you also could ask third party(SGS,BV) to inspect goods.

All the measures to show our determination to manufacture high quality steel tubes


1: If l don't know what kind of the product l need, what should l do?

Just take it easy,you just need to provide us "working pressure","temperature" and "media."Then, we can suggest the most suitable product to you,or we provide you our catalog for your reference,you choose the suitable model,you only need to tell us the model number.

2: If l need, can l get a free sample from your company?

Of course you can, However, maybe you need to pay freight fee.

3: Can you give me a discount?

Discount is available,but we have to see the real quantity,we have different price based on different quantity,how much discounts is determined by the quantity,moreover,our price is very competitive in the field.

well, if the quantity is so big, we may give you a big discount.

4: If l have a product wants to be made in other special material, can you do it?

Of course, you just need to provide us design drawings or sample, we will give you the most satisfactory reply.

5: Can l visit your factory?

By all means, we warmly welcome your arrival,

Before you take off from your country, please let us know.

We will show you the way and arrange time to pick you up if possible

oval steel tubes

Quality control
It mainly controls from the aspects of feed inspection, production process, factory inspection and after-sales service to ensure the overall quality of the products.Incoming Inspection (IQC): Full inspection, random inspection and batch inspection of all incoming raw materials and spare parts. Distinguish the defective products that do not meet the company's requirements and make obvious indic...more
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Copyright © 2019 Tianjin Hongxing International Trade Limited. Company address: Xishan Road Industrial Research Institute, Lubei District, Tangshan City, Hebei Province, China. Email: helen12.27@hotmail.com