GB/T 31940 Stainless Steel Tube Bi-Metal Composite Corrosion Resistance For Fluid Transportation
GB/T 31940 Bi-metal Composite Corrosion Resistance Steel Pipe for Fluid Transportation
Introduction
The GB/T 31940 standard defines the requirements for bi-metal composite corrosion resistance steel pipe, specifically designed for fluid transportation applications. This article provides an overview of the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades of this innovative steel pipe.
Material and Specification
| Material | Bi-metal composite corrosion resistance steel |
|---|---|
| Specification | GB/T 31940 |
Key Features
- Corrosion resistance
- Durability
- High strength
- Enhanced fluid flow
- Long service life
- Cost-effective
Chemical Composition
The chemical composition of GB/T 31940 bi-metal composite corrosion resistance steel pipe is detailed in the table below:
| Element | Chemical Composition (%) |
|---|---|
| Carbon (C) | 0.05 - 0.12 |
| Manganese (Mn) | 0.30 - 0.60 |
| Silicon (Si) | 0.20 - 0.50 |
| Chromium (Cr) | 0.50 - 1.00 |
| Nickel (Ni) | 1.50 - 2.50 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
Mechanical Properties
The mechanical properties of GB/T 31940 bi-metal composite corrosion resistance steel pipe are as follows:
| Property | Value |
|---|---|
| Tensile Strength (MPa) | ≥ 560 |
| Yield Strength (MPa) | ≥ 390 |
| Elongation (%) | ≥ 22 |
| Impact Toughness (J/cm²) | ≥ 45 |
| Hardness (HB) | ≤ 250 |
Steel Grade and Application
The GB/T 31940 standard specifies different steel grades for bi-metal composite corrosion resistance steel pipes. These grades are suitable for various fluid transportation applications, including but not limited to:
- Oil and gas industry
- Water treatment plants
- Chemical processing plants
- Power generation facilities
Possible Alternative Grades
While GB/T 31940 bi-metal composite corrosion resistance steel pipe is a highly specialized material, there are some possible alternative grades that may be considered for specific applications. These include:
- Stainless Steel: Offers excellent corrosion resistance, but may be more expensive.
- Polymer-Coated Steel: Provides corrosion protection with a lightweight and flexible solution, suitable for certain application conditions.
- Fiberglass-Reinforced Plastic (FRP): Offers exceptional corrosion resistance with excellent strength-to-weight ratio, commonly used in the chemical industry.
It is important to carefully evaluate the specific requirements of each application before selecting an alternative grade to ensure compatibility and optimum performance.
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.
Q: Are you trading company or manufacturer ?
A: manufacturer,also can do trading.
Q: How long is your delivery time?
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.
Q: Do you provide samples? is it free or extra ?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment ?
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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.