Technology is the core driving force of quality, and quality is the cornerstone of Rizhao Steel's development. For many years, we have been committed to improving production technology and optimizing our quality control system to ensure that every steel pipe leaving the factory meets international standards and customer requirements. Our products cover welded steel pipes, seamless steel pipes, hot-dip galvanized steel pipes, spiral steel pipes, and plastic-coated steel pipes, all manufactured us
Welded Pipe Production: Adopt high-frequency welding, submerged arc welding and other advanced welding technologies, with stable welding quality, high welding strength, and smooth pipe surface, suitable for various medium transmission and structural applications.
Seamless Pipe Production: Adopt hot rolling, cold drawing and other processes, with uniform wall thickness, high precision, strong pressure resistance, and widely used in high-pressure, high-temperature and other harsh working environments.
Hot-Dip Galvanizing Technology: Use professional hot-dip galvanizing production lines, with uniform galvanized layer, strong adhesion, good corrosion resistance, effectively extending the service life of steel pipes in outdoor, humid and corrosive environments.
Spiral Pipe Production: Adopt continuous spiral welding technology, with high production efficiency, large pipe diameter range, strong bearing capacity, and suitable for large-scale water supply, drainage, oil and gas transmission projects.
Plastic-Coated Pipe Production: Adopt internal and external plastic coating technology, with excellent corrosion resistance, wear resistance, and non-toxicity, suitable for drinking water transmission, chemical pipeline and other fields.
Strict Quality Control System
Quality is the life of Rigang. We have established a strict quality control system covering the whole production process, from raw material inspection to finished product testing, to ensure that every product is qualified:
Raw Material Inspection: We strictly select high-quality steel raw materials from well-known suppliers, and conduct strict inspection on the chemical composition, mechanical properties and other indicators of raw materials to eliminate unqualified raw materials from the source.
In-Process Quality Supervision: Arrange professional quality inspectors to supervise each production link, including blanking, forming, welding, surface treatment, etc., and timely correct any problems found to ensure
Finished Product Testing: For all finished steel pipes, we conduct comprehensive testing, including dimensional inspection, pressure test, corrosion resistance test, welding quality test, etc., and only products that pass all tests can leave the factory.
Quality Certifications: Our products have passed ISO9001 international quality certification and ASTM, DIN, JIS, BS, GB, and other certifications, ensuring that production and quality management meet international standards. Furthermore, we have obtained AEO (Authorized Economic Operator) certification and CNAS (China National Accreditation Service for Conformity Assessment) certification, fully demonstrating our standardized management level and product quality reliability. We can also customiz
First class quality service and professional after-sales team.
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