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GB/T 3091 is the Chinese national standard for hot-dip galvanized carbon steel pipes used in low-pressure liquid delivery applications. This standard specifies the material, specification, key features, chemical composition, mechanical properties, steel grades, application, and possible alternative grades for these pipes.
The pipes included in GB/T 3091 are made from carbon steel and undergo a hot-dip galvanization process. This process involves immersing the steel pipes in a bath of molten zinc, which creates a protective zinc coating on the surface. The coating helps to prevent corrosion and extends the lifespan of the pipes.
The specification outlined in GB/T 3091 covers the following parameters for the carbon steel pipes:
These specifications ensure that the pipes meet the necessary requirements for low-pressure liquid delivery while maintaining superior corrosion resistance.
The hot-dip galvanized carbon steel pipes specified by GB/T 3091 offer several key features that make them suitable for low-pressure liquid delivery:
Corrosion Resistance: The zinc coating applied through the hot-dip galvanization process protects the pipes from rust and corrosion, enhancing their durability and longevity.
Strength and Sturdiness: Carbon steel provides excellent strength and sturdiness, ensuring the pipes can withstand the intended operating conditions.
Easy Installation: The welded construction of these pipes facilitates easier installation, saving time and effort during the assembly process.
Cost-Effective: GB/T 3091 hot-dip galvanized carbon steel pipes offer a cost-effective solution for low-pressure liquid delivery, providing long-term reliability without sacrificing performance.
The chemical composition of the hot-dip galvanized carbon steel pipes conforming to GB/T 3091 is summarized in the table below:
| Element | Chemical Composition (%) |
|---|---|
| Carbon (C) | 0.17 max |
| Silicon (Si) | 0.30 max |
| Manganese (Mn) | 1.40 max |
| Phosphorus (P) | 0.040 max |
| Sulfur (S) | 0.045 max |
The mechanical properties of the hot-dip galvanized carbon steel pipes specified by GB/T 3091 are presented in the table below:
| Property | Minimum Requirement |
|---|---|
| Tensile Strength (MPa) | 320 |
| Yield Strength (MPa) | 195 |
| Elongation (%) | 20 |
| Impact Test | No fracture or visible cracks |
According to GB/T 3091, the steel grades available for hot-dip galvanized carbon steel pipes include Q195, Q215, Q235, and Q345. These grades are selected based on their appropriate mechanical properties and compatibility with low-pressure liquid delivery applications.
The hot-dip galvanized carbon steel pipes specified by GB/T 3091 are primarily used for low-pressure liquid delivery. They find applications in various industries, including:
These pipes are ideally suited for transporting water, gas, and other fluids safely and efficiently in low-pressure scenarios.
Although GB/T 3091 provides specific steel grades, there are alternative grades available in other international standards. Some possible alternative grades to consider include ASTM A53, BS 1387, and DIN 2440. It is essential to ensure that any alternative grade chosen meets the specific requirements for low-pressure liquid delivery and is approved by relevant regulatory bodies.
Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
A: manufacturer,also can do trading.
A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.
If you have another question, pls feel free to contact with me.