I. Source Control: Raw Materials are the Cornerstone of QualityThe first step in quality control begins with raw materials. High-quality steel is the prerequisite for manufacturing high-quality flanges.Material Certificate Verification: Purchased steel plates, billets, or pipes must be accompanied b

Steel pipes fresh from rolling or cold drawing often have suboptimal internal microstructures, potentially exhibiting uneven internal stresses, insufficient hardness, excessive brittleness, and poor toughness. This is when the industry's "alchemy"—heat treatment—comes in. By precisely controlling th