Longda Steel Industry Group Co., Ltd.
Longda Steel Industry Group Co., Ltd. was established in 2005 and is located in Songyang County, Lishui City, Zhejiang Province—an area renowned for its rich history and natural beauty. The company covers an area of more than 50,000 square meters and operates two stainless steel pipe production bases along with three warehousing and logistics distribution centers. With over 280 employees, Longda has an annual production capacity of approximately 20,000 tons of seamless stainless steel pipes.
After nearly two decades of focused development and technical accumulation, Longda stainless steel products have been exported to Malaysia, the United Kingdom, the United States, Canada, Austria, New Zealand, Russia, Ukraine, South Korea, Japan, India, and many other countries and regions, earning strong market recognition and long-term customer trust.
Products & Specifications
Longda specializes in seamless stainless steel pipes with the following specifications:
- Outer diameter: 6–720 mm
- Wall thickness: 1–50 mm
- Length: 100–13,000 mm
Main materials include:
- Austenitic stainless steels: 304, 304L, 304H, 321, 321H, 316, 316L, 317L, 310S, 347H, 904L
- Duplex & super duplex steels: S32205, S32507
- 400, 600, and 800 series stainless steels
- Nickel-based alloys
These products are widely used in petroleum, chemical fiber, food and pharmaceutical processing, machinery manufacturing, metallurgy, aerospace, papermaking, shipbuilding, environmental protection, boilers, heat exchangers, pressure vessels, and power generation industries.
Technical Strength & Quality Assurance
Backed by strong technical expertise, advanced production and inspection equipment, and a comprehensive quality assurance system, Longda has been approved as a qualified supplier by major enterprises in petrochemical, nuclear power, hydropower, and infrastructure sectors, including:
- Sinopec, PetroChina, CNOOC
- China National Nuclear Corporation (CNNC)
- China Energy Engineering Group
- China National Chemical Corporation
- China State Construction Engineering Corporation
Providing high-quality products and continuously improving performance standards is a core responsibility of the company. In recent years, Longda has also implemented MES and ERP digital management systems, creating an integrated development model that combines advanced manufacturing with value-added services.
Innovation & Honors
Longda currently holds 6 invention patents and 50 utility model patents, and operates a provincial-level research institute. The company is recognized as a:
- “Specialized, Refined, Distinctive, and Innovative” High-Tech Enterprise
- Zhejiang Province Intellectual Property Demonstration Enterprise
Key achievements include:
- 2018: Development of high-temperature, corrosion-resistant seamless stainless steel pipes for nuclear industry cold-treatment applications; awarded a Provincial Industrial New Product Award
- 2020: “Chugang” brand seamless stainless steel pipes awarded Zhejiang Famous Brand Product
- 2022: Listed in the Zhejiang Manufacturing Boutique List
- 2023: Passed Zhejiang Manufacturing Product Label Certification
Philosophy & Vision
“Quality is stainless, reputation is eternal” is Longda’s guiding business philosophy. Upholding the values of honesty, trustworthiness, exploration, and innovation, Longda is committed to building a strong corporate image and creating long-term value for customers through modern management and superior products.
Customer satisfaction remains Longda’s constant pursuit. The company sincerely looks forward to cooperating with partners at home and abroad to jointly create a brighter future for the global stainless steel industry.
