Knowledge

1. Appearance and Dimensional Inspection Appearance Inspection: Observe whether the surface is smooth and free of defects such as cracks, folds, scars

I. Enhance Pre-treatment to Ensure Substrate Cleanliness and Activation 1. Thorough Degreasing: Use alkaline cleaning agents combined with ultrasonic

I. Typical Manifestations of Insufficient Bonding Strength 1. Peeling: The plating edges warp and peel off in flakes, visibly separating from the subs

I. Common Quality Problems Related to Plating Layer 1. Uneven Plating or Localized Absence of Plating Causes: Uneven current distribution, poor contac

1. Plating Thickness Standard Range: Typically 0.015–0.025 mm (15–25 μm), but can be thickened to over 0.05 mm for some wear-resistant

I. Material Defects: Identifying Hidden Dangers at the "Genetic" Level Material is the foundation of steel pipe performance. If the chemical

I. Material Issues: Substandard Composition or Inferior Materials When there are deviations in chemical composition, excessive levels of harmful eleme

I. Ultrasonic Testing (UT): The Core Method for Detecting Internal Defects Ultrasonic testing is the most commonly used and efficient technique for de

I. Preventing Material Defects: Controlling the "Source" Material is the foundation for steel pipe performance. To avoid substandard chemica

I. Main process flow of hot-rolled seamless steel tubes 1. Billet preparation and inspection: High-quality carbon steel or alloy steel round billets a

I. Common Non-Destructive Testing Methods and Applicable Scenarios 1. Ultrasonic Testing (UT) Applicable to: Detecting internal cracks, such as deep d

I. Core Contents of Visual Inspection 1. Surface Defect Inspection Cracks: Distributed along the axial or spiral direction of the steel tube, often ca