Shandong Diyang International Trade Co., Ltd.

DIYANG STAINLESS STEEL PRODUCTS Co., Ltd. - COMPANY PROFILE

1. About Us

Founded in 2012, Diyang Stainless Steel Products Co., Ltd. is a professional manufacturer and exporter specializing in stainless steel marine hardware, pipe fittings, and valves. Located in China's industrial hub, our company integrates precision investment casting, CNC machining, and polishing into a complete and efficient production system.

Over the past 15 years, Diyang has grown from a small workshop into a trusted global supplier with customers in more than 14 countries and regions, including Dubai, Russia, the Netherlands, France, and Germany.

Whether you are looking for standard stainless steel products or customized parts, Diyang is ready to support your business with reliable quality and professional service.

2. Our Main Product Categories

(1) Stainless Steel Marine Hardware

Our marine hardware products are precision-cast and polished to meet the highest standards of marine environments. Main categories include:

All items are available in AISI 304 and 316 stainless steel, ensuring excellent resistance to corrosion and long service life in harsh saltwater conditions.

(2) Stainless Steel Pipe Fittings and Valves

Our pipe fitting series covers both standard and customized connection types, with threads such as NPT, BSP, and ISO.

Products include:

Male Connectors and Double-Thread Connectors

Elbows, Tees, and Crosses

Ball Valves and Check Valves

Couplings, Adapters, and Reducers

3. Manufacturing Process

At Diyang, every product undergoes a strict investment casting process that reflects our commitment to craftsmanship:

Mold Making → 2. Wax Injection → 3. Wax Repair → 4. Tree Assembly → 5. Shell Coating (Five Layers, Final Seal Layer) → 6. Drying (4 Days) → 7. Dewaxing → 8. Pouring/Casting → 9. Cutting → 10. Grinding → 11. Shot Blasting → 12. Polishing → 13. Inspection and Packaging

Our polishing department employs both manual and mechanical techniques to achieve mirror-like finishes. Each product passes through multiple quality inspections, ensuring that every item leaving our factory meets international standards.

4. Quality Control & Inspection

We believe quality is the cornerstone of long-term cooperation.

Our factory strictly follows ISO-quality management principles, supported by skilled technicians and advanced inspection equipment.

Each order goes through:

Raw material chemical composition testing

Dimensional tolerance verification after CNC machining

Surface and polishing inspection

Thread gauge testing (NPT/BSP/ISO)

Final random sampling before shipment

We also welcome third-party inspection upon customer request.

5. Customization & Engineering Capability

In addition to standard products, we offer customized manufacturing services based on customer drawings, samples, or design concepts.

Our in-house mold workshop and engineering team can:

Develop new designs from sketches or CAD drawings

Modify existing models to meet unique application needs

Provide prototypes for evaluation before mass production

 
6. Delivery & Logistics

We understand that time is critical for our clients.

Standard products: Delivery within 7 days

Custom products: Delivery around 20 days

We work with reliable logistics partners to ensure safe and timely delivery worldwide.


7. Our Markets & Global Reach

We have successfully exported to over 14 countries and regions, and our main markets include:

Middle East (UAE, Saudi Arabia, Qatar)

Europe (Netherlands, Germany, France)

Russia and Eastern Europe

United States and North America