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轮播海报1-工厂-修订3
"One-stop" Shopping black Steel Pipe In China
This is the most complete guide to sourcing black steel pipes
 
So if you're wondering:
 
  • black steel pipe sizes
  • black steel pipe specifications
  • black iron pipe vs galvanized
  • what is black steel pipe used for？

Then you'll love the details in today's guide.
Let’s dive right in. 
 
Black steel pipe sizes
 
Looking to buy black steel pipes? 
The table below shows the most common steel pipe sizes with their outside diameter (OD), nominal bore (NB) and wall thickness to help you better understand the differences in steel pipe sizing.
 
Pre-Galvanized Hollow Sections
Standard Common Tube
Normal Size Side length Tolerance Thickness Outer Arc Radius Bend Tolerance Length Length Tolerance
Q195
Q215
Q235		 16 16 +0.3-0.5 0.6-1.5 1.0-2.5t ≤2mm/m 4000-12000 +20, -0
19 19 0.6-2.0
20 20 0.6-2.0
25 25 0.6-2.0
30 30 0.6-2.0
32 32 0.6-2.0
35 35 0.6-2.0
38 38 0.6-2.0
40 40 0.6-2.0
50 50 0.7-2.2
60 60 1.0-2.2
75 75 1.0-2.2
80 80 1.0-2.2
100 100 1.2-2.3
20 40 0.6-2.0
25 50 0.6-2.0
30 40 0.6-2.0
30 50 0.6-2.0
35 55 0.6-2.0
37 57 0.6-2.0
40 60 0.6-2.0
37 77 0.6-2.0
25 75 0.9-2.0
40 80 1.0-2.2
50 75 1.0-2.2
38 75 1.0-2.2
50 100 1.0-2.2
50 150 1.3-2.2
Pre-Galvanized Round Pipe
Standard Common Tube
Normal Size Side length Tolerance Thickness Thickness Tolerance Round Tolerance Bend Tolerance Length Length Tolerance
Q195
Q215
Q235		 20 ±0.3 0.6-2.2 ±0.05mm ≤0.5 ≤2mm/m 4000-13000 +20, -0
25 0.6-2.2 4000-13000
25.4 0.6-2.2 4000-13000
32 0.7-2.3 4000-13000
38 0.7-2.3 4000-13000
40 0.7-2.3 4000-13000
42 0.7-2.3 4000-13000
47 0.8-2.5 4000-13000
48.3 0.8-2.5 4000-13000
59 0.8-2.5 5000-10000
60.3 0.8-2.5 5000-10000
75 0.8-2.5 5000-10000
87 0.8-2.5 5000-10000
112 0.8-2.5 5000-10000

black iron pipe vs galvanized

1. Different coating.
Black pipe is made of steel as is galvanized pipe. The difference is that galvanized pipe is coated with zinc, while the black pipe is not.

2. Different Corrosion resistance
The black pipe is a light coating and provides only the barest protection. The black pipe will rust outdoors. The galvanized pipe will barely rust at all.

3. Different costs.
Black pipe is cheaper than galvanized pipe because of the zinc that is added to the galvanized pipe.

4. Different application
Black pipe is best used for gas lines, not for water lines because it rusts easily, while galvanized cannot be used for gas lines because the zinc can clog the lines when it begins to flake, galvanized pipe is the safer pipe to use in water lines.

​​​​​​​

Features and uses of black steel pipes
They have no coating
They require less maintenance
Used in the petroleum industry to move large amounts of oil in remote areas.
Used in the distribution of gas.

形状结合
形状结合备份
Your Projects, our passion
 
 
Why Work With JZY
What will you get by working with JZY?
 
Tianjin JZY Steel Pipe Co., Ltd is located in Jinghai, Tianjin, and JZYsteel has more than 20 years of industry knowledge, experience, and partnerships, allowing us to provide tonnes of steel at competitive prices, and most importantly, this means your projects are completed on time and on budget.
Our Benifits

 
Exhibitions
 

  • Thailand Building Materials Exhibition

    During the exhibition, our employees also took the time to visit several local customers who have cooperated for many years to express our gratitude. In the future, we will further widen the gap with our competitors in terms of product quality.

  • Canton Fair

    Many buyers inspect factories after the Canton Fair in China, and 80% of them are from the Middle East and Southeast Asia. In just two months, our sales in these two regions have reached more than 3 million US dollars.

  • South Africa Building Materials Exhibition

    The consultation of more than 200 companies is the recognition and support of Jinzhuoyi Steel's strength, and the catalog have been swept away within 2 hours.

  • Myanmar Building Materials Exhibition

    On the first day of the exhibition, we made more than 800 tons steel pipe contracts, and cooperative relations have been established with many professional buyers.

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