Quality
Adhering to strict quality control processes in compliance with ISO 9001 standards to ensure product reliability.
Raw Material Input
Surface: Visual inspection, roughness measuring device
Dimensions: Micrometer
Thickness: Micrometer
Cold Drawn Production
Surface: Visual inspection, roughness measuring device
Dimensions: Micrometer / inner calipers
Reduction Ratio: Based on raw material area vs. drawn tube area
Hardness: Hardness tester
Mechanical Properties: Tensile testing machine
Straightening Production
Straightness: Visual inspection, dial indicator
Ovality: Micrometer
Packing
Surface: Visual inspection, roughness measuring device
Dimensions: Micrometer / inner calipers
Straightness: Visual inspection / dial indicator
Ovality: Micrometer
Hardness / Mechanical Properties: Through third-party SGS inspection per heat number
# All of the above are 100% quality check