1.Raw Material Inspection & Preparation:Adopt high-quality carbon steel strips and premium flexible non-metallic filler materials that comply with international sealing industry standards. Strictly inspect the thickness uniformity, surface flatness, tensile strength and material toughness of carbon steel strips, and check the high-temperature resistance and compression resilience of non-metallic fillers. Eliminate defective materials with cracks, impurities and uneven texture. All qualified raw materials are sorted and prepared according to gasket specifications to ensure stable foundation for subsequent winding and forming.
2.Steel Strip Surface Galvanizing Treatment:
Conduct professional color zinc-plating process on the qualified carbon steel strips. Through degreasing, pickling, activation, electro-galvanizing and chromate passivation procedures, a uniform and dense color zinc protective layer is formed on the steel strip surface. This treatment significantly improves anti-rust, anti-oxidation and anti-corrosion performance, effectively avoiding surface discoloration and metal oxidation during long-term storage and industrial service.
3.Alternate Spiral Winding & Integral Forming:
Adopt precision automatic winding equipment to perform staggered alternate winding of color zinc-plated carbon steel strips and soft non-metallic fillers. Strictly control winding tension, lap gap and layer uniformity to ensure compact internal structure, uniform density and stable overall flatness. The composite winding structure perfectly combines the high strength of metal material and the excellent compression resilience of non-metallic material, realizing reliable basic sealing performance.
4.Shaping, Trimming & Ring Calibration:
Perform integral cold pressing and shaping on the wound semi-finished gaskets to stabilize overall thickness and structural compactness. Trim redundant edges and irregular parts to ensure neat inner and outer circles without burrs or protrusions. Conduct precision roundness and flatness calibration to guarantee standard geometric dimensions, enabling perfect fitting and contact with various standard flange surfaces.
5.Pressure Testing & Full Quality Inspection:
Carry out professional compression resilience test, tightness simulation test and structural stability test to verify sealing performance under rated temperature and pressure conditions. Implement full-range quality inspection including dimensional tolerance detection, surface plating quality check, winding uniformity inspection, flatness test and appearance defect screening. All products are strictly verified to meet industrial pipeline sealing standards.
6.Sorting, Packaging & Warehousing:
Classify and label qualified color zinc-plated carbon steel spiral wound gaskets according to size and specification standards. Adopt dust-proof, moisture-proof and anti-extrusion independent packaging to protect the plating layer and winding structure from damage and deformation. Finished products are sorted and stored in standardized warehouses and delivered after strict final inspection.