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The steel pipe impact energy testing equipment is mainly used to measure the ability of steel pipes to resist impact under dynamic loads. The core equipment is the metal pendulum impact testing machine. This equipment uses the pendulum to break the cantilever beam or simply supported beam specimen in one impact, and calculates the impact absorption energy and impact toughness of the material based on the principle of energy conservation.
Common types of impact tests for steel pipes
A. Charpy Impact Test (Hill's Impact Test)
Standard: GB/T 229, ASTM E23, ISO 148
|
Item |
Details |
|
Model |
PIT302M |
|
PIT502M |
|
|
Type |
B |
|
Impact Energy (J) |
150, 300 |
|
250, 500 |
|
|
Impact Velocity (m/s) |
5.2 |
|
5.4 |
|
|
5.24 |
|
|
Pendulum Angle |
150° |
|
Standard Span (mm) |
40±0.2 mm |
|
Distance between Pendulum Rotation Center and Specimen Center |
750 mm |
|
Jaw Radius (mm) |
R1–1.5 |
|
Impact Edge Radius (mm) |
R2–2.5 or R8±0.05 |
|
Specimen Dimensions (mm) |
10 × 10(7.5/5) × 55 |
|
Power Supply |
3 phases, 380V/220V±10%, VAC 50Hz or as specified |
|
Dimensions (mm) |
around 2124 × 600 × 1340 |
|
around 2144 × 736 × 1390 |
|
|
Gross Weight (KG) |
around 550 |
|
around 750 |
B. Drop Weight Impact Test
This is mostly used for pipeline steel, oil pipes, and DWTT drop weight tear test
|
Item |
Typical Range |
|
Max. Impact Energy |
30000～100000J |
|
Min. Impact Energy |
8000～20000J |
|
Hammer Mass |
630～1620kg |
|
Impact Height |
750～3062mm |
|
Impact Velocity |
5.0～7.7m/s |
|
Sample Specification |
Standard pipeline sample (e.g. 10×77×305mm) |
|
Release Mode |
Electromagnetic / hydraulic release |
|
Power Supply |
380V three-phase, 50Hz |
|
Overall Dimension |
Large floor-standing type, height ≥5m |
Main experimental standards
- GB/T 229: Method for impact test of metallic materials - Hill's impact test.
- GB/T 2102: Acceptance, packaging, marking and quality certificate of steel pipes.
- ISO 148-1: Method for impact test of metallic materials - Hill's impact test.
Test process
- Sampling and sample preparation: Cut steel pipe samples according to the standard and process them into standard test specimens that meet requirements
- Create notches: Prepare V-shaped or U-shaped notches
- Low-temperature treatment (if necessary): Freeze the specimens in a low-temperature tank to the specified temperature
- Impact test: Place the specimen on the test machine support, and release the hammer for impact
- Data reading: Record the impact energy value and perform result calculation
Supporting equipment
- Low-temperature tank / Low-temperature instrument
- Used for conducting low-temperature shock tests (-196℃ to room temperature), to test the low-temperature brittleness of steel pipes.
- Notch grinding machine
- Processes V-shaped notches for Schaeffler test specimens.
- Sample cutting machine, grinding machine
- Prepares standard impact specimens.
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