- Spectrum machine
Laboratory Capability
Liwan Precision operates a fully equipped laboratory with advanced testing systems, enabling comprehensive inspection of raw materials, in-process products, and finished steel tubes. The lab supports mechanical testing, metallographic analysis, dimensional measurement, and surface quality inspection to ensure consistent product quality and reliability.
Testing Equipment
- Universal testing machine
- Roughness tester
- Microscope
- Contour machine
- Hardness gauge
- Pressure burst test bench
- Coordinate measuring machine
Testing Standards
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Tensiletest
GB/T228.1-2021, ENISO 6892-1-2017
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Chemical composition
GB/T222-2006
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Roughness measurement
GB/T3505-2009，GB/T1031-2009
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Geometric tolerance
GB/T1804-2000, ISO 2768-2-1993
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Hardness test
GB/T4340.1-2009, ISO 6507-1:2005, ISO 2639, ASTME 384
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Metallographic examination
GB/T13298-2015, GB/T13452.2-2008, ISO 1463
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Depth of decarburization
GB/T224-2008,ISO3887-2017,ASTME1077
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Grainsize
GB/T6394-2017, ASTME112-13, ISO 643-2012
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Contentof inclusions
GB/T10561-2005, ASTME45-18,DIN50602-1985,ISO4967-2013
Destructive standards
Tensile test
- to check yield strength, tensile strength, elongation and etc.
Drift expanding test
- to check welding seam and tube deformation resistance.
Flattening test
- to check welding seam quality.
Microsection
- Metallography evaluate fusion zone width, weld flow angle, material grain size etc.
Burst Test
- This test is used for high-low temperature dynamic burst testing of tubes for airbags.(8-300Mpa,-60-120°C)
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