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01
GOST 8732 Seamless Hot-rolled Steel Pipes
Ordering Information
When ordering pipes under GOST 8732, the following must be specified:
- Standard designation (e.g., GOST 8732-202X)
- Dimensions (outer diameter, wall thickness, length)
- Steel grade (e.g., St20, 09G2S, 12Х18Н10Т)
- Delivery condition (hot-rolled, heat-treated if required)
- Additional requirements (e.g., non-destructive testing, special tolerances)
Main Steel Grades
The standard includes carbon and alloy steel grades, such as:
| Category | Steel Grades (Examples) |
| Carbon Steels | St10, St20, St35, St45 |
| Low-Alloy Steels| 09G2S, 17G1S, 10Г2 |
| Alloy Steels | 12Х18Н10Т (stainless), 30ХГСА |
Note: Chemical composition and mechanical properties (yield strength, tensile strength, elongation) are specified in referenced standards (e.g., GOST 1050, GOST 4543).
Dimensional Tolerances
- Outer diameter: ±1.0–1.5% (varies by size)
- Wall thickness: ±10–12.5%
- Length:
- Unmeasured: +100 mm
- Measured: ±10 mm
Inspection & Testing Requirements
Pipes must undergo:
1. Mechanical Tests (tensile, hardness) – sampled per batch.
2. Hydraulic Pressure Test (optional, if specified).
3. Non-Destructive Testing (NDT) (ultrasonic or eddy current, if required).
4. Visual & Dimensional Inspection (surface defects, ovality, straightness).
Marking & Packaging
- Each pipe is marked with:
- Manufacturer’s name/logo
- Steel grade
- Heat number
- Inspection certificate number
- Packaging: Bundled with protective coatings (anti-rust oil, varnish) or as agreed.
Certification
Suppliers must provide a certificate of compliance including:
- Chemical analysis
- Mechanical test results
- Heat treatment data (if applicable)
- NDT reports (if applicable)
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