GOST 8732-78 refers to a Russian standard that governs the manufacturing and quality control of hot-rolled seamless steel alloy tubes, specifically designed for use in hot-worked steel pipes used in natural gas applications. This standard ensures the production of reliable and durable pipes that meet the stringent requirements of the natural gas industry.
The GOST 8732-78 standard specifies the material composition, dimensions, tolerances, and mechanical properties required for hot-rolled seamless steel alloy tubes. The material used in these tubes is typically an alloy steel, which provides enhanced strength and corrosion resistance.
The tubes are manufactured using a hot rolling process, ensuring precise dimensions and a seamless structure. This technique offers an excellent balance between strength and ductility, making the tubes suitable for demanding natural gas applications.
The key features of GOST 8732-78 alloy tubing include:
| Element | Composition Range (%) |
|---|---|
| Carbon (C) | 0.07 - 0.13 |
| Manganese (Mn) | 0.30 - 0.60 |
| Silicon (Si) | 0.17 - 0.37 |
| Chromium (Cr) | 0.30 - 0.60 |
| Nickel (Ni) | 0.30 - 0.60 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Copper (Cu) | ≤0.30 |
| Phosphorus (P) | ≤0.035 |
| Sulfur (S) | ≤0.035 |
| Property | Value |
|---|---|
| Yield Strength (Mpa) | ≥490 |
| Tensile Strength (Mpa) | 590 - 740 |
| Elongation (%) | ≥16 |
| Impact Absorption (J) | ≥41 |
GOST 8732-78 alloy tubing is available in various steel grades. The most commonly used steel grades include:
These hot-rolled seamless steel alloy tubes, conforming to GOST 8732-78, find extensive use in the natural gas industry. They are primarily employed in the fabrication of hot-worked steel pipes for the transportation of natural gas.
Due to their high strength, corrosion resistance, and reliable performance, these tubes are essential components in the construction of natural gas pipelines, ensuring the safe and efficient transportation of gas over long distances.
While GOST 8732-78 alloy tubing provides excellent performance in natural gas applications, there are alternative grades of steel tubes available as well. Some of the possible alternative grades that may be considered based on specific project requirements include ASTM A53, DIN 1629, and API 5L.
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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