GOST 8732 Seamless Steel Tube: Hot-Formed Galvanized Surface Carbon Steel Tube For Gas Transportation
Introduction
The GOST 8732 standard specifies the requirements for seamless hot-formed steel tubes with a galvanized surface, designed primarily for gas transportation applications. These tubes are manufactured using high-quality carbon steel, ensuring durability and reliability in gas transportation systems.
Material and Specification
| Property | Value |
| Standard | GOST 8732 |
| Material | Carbon Steel |
| Surface | Galvanized |
| Manufacturing Method | Hot-Formed |
| Outer Diameter Range | 10mm - 426mm |
| Wall Thickness Range | 1.5mm - 40mm |
| Length | 4m - 12m |
Chemical Composition
The chemical composition of the GOST 8732 seamless steel tubes with galvanized surface is as follows:
| Element | Composition Range |
| Carbon (C) | 0.07% - 0.13% |
| Silicon (Si) | 0.17% - 0.37% |
| Manganese (Mn) | 0.35% - 0.65% |
| Sulfur (S) | 0.035% max |
| Phosphorus (P) | 0.035% max |
Mechanical Properties
The mechanical properties of these carbon steel tubes conform to the standards set by GOST 8732:
| Property | Minimum Value |
| Yield Strength (Rt) | 235 MPa |
| Tensile Strength (Rm) | 410 - 550 MPa |
| Elongation (A) | 24% min |
| Impact Toughness | No less than 27 J/cm² |
Steel Grade
The steel grade used for GOST 8732 seamless steel tubes with galvanized surface is 10, 20, 35, 45, 10G2, and 20Ch.
Application
These seamless steel tubes find extensive application in gas transportation systems. Due to their hot-formed galvanized surface and robust carbon steel composition, they are well-suited for conveying gases under various temperatures and pressures. Their durability, corrosion resistance, and high mechanical properties make them a reliable choice for gas transmission pipelines.
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