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The GB/T 21832 standard provides the requirements for welded austenitic-ferritic duplex stainless steel tubes and pipes specifically designed for heat exchanger applications. This standard establishes the material and specifications that need to be met to ensure the quality and reliability of the products.
The welded austenitic-ferritic duplex stainless steel tubes and pipes manufactured according to GB/T 21832 exhibit several key features that make them suitable for heat exchangers:
Element | C | Si | Mn | P | S | Cr | Ni | Mo | N |
---|---|---|---|---|---|---|---|---|---|
Weight % | 0.03-0.08 | ≤1.00 | ≤2.00 | ≤0.035 | ≤0.020 | 21.0-23.0 | 4.5-6.5 | 2.5-3.5 | 0.08-0.20 |
Property | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
---|---|---|---|---|
Minimum Value | ≥ 620 | ≥ 450 | ≥ 25 | ≤ 290 |
The GB/T 21832 standard covers various steel grades suitable for heat exchanger application. These grades include:
These steel grades exhibit similar mechanical properties and chemical composition, ensuring high-performance under demanding conditions.
Welded Austenitic-Ferritic Duplex Stainless Steel Tubes and Pipes, as per GB/T 21832, are predominantly used in heat exchangers. These devices are widely employed in various industries, including chemical processing, petroleum refining, power generation, and desalination plants. The superior corrosion resistance and thermal conductivity of these tubes and pipes make them a reliable choice for efficient heat transfer between different fluids.
While the steel grades mentioned earlier are commonly used, there are also alternative grades that can be considered for specific applications. Some of the possible alternative grades to GB/T 21832 include:
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.
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