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Premium Forged Flanges & Piping Solutions

Over 20 years of excellence in manufacturing and exporting high-quality flanges, fittings, valves, and pipes for the global oil, gas, chemical, and power industries. Trusted by engineers and procurement teams worldwide.

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About Overwell(Jinan)

Overwell(Jinan) Piping Materials Manufacturing Co., Ltd. is a private-owned company and a professional manufacturer & exporter of pipe materials including flanges, fittings, valves, and pipes, serving chemical, oil, gas, and power companies all over the world.

With over 20 years of experience in exporting, we have established a strong market presence globally. Our international sales agents provide continuous feedback on consumer needs, helping us maintain a sound reputation in the piping industry.

Our excellence stems from a strict system of quality control and inspection throughout the manufacturing processes, including physical and chemical analysis. We adhere to international standards such as 97/23/EC, AD2000-Merkblatt W0/TRD100.

Our Manufacturing Network

  • • Jinan Sun Metal & Plastic Products Co., Ltd
  • • Jinan Sun-Wei Forging & Casting Co., Ltd
  • • Metall & Rohrzubehör Weilbeer GmbH (Leipzig, Germany)
Industrial Flange Manufacturing

Precision forging and casting at our Jinan, China facilities

Our Product Range

High-performance piping components engineered for reliability, durability, and global compliance.

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Forged Steel Flanges

Available in various pressure ratings (Class 150 to 2500), materials (carbon steel, stainless steel, alloy), and standards (ASME, DIN, JIS). Ideal for high-pressure and high-temperature applications.

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Buttwelding Fittings

Elbows, tees, reducers, and caps in seamless and welded forms. Manufactured to ASME B16.9 standards with precise dimensional control and full material traceability.

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Forged Fittings

Socket weld and threaded fittings in 90° elbows, tees, couplings, unions, and caps. Made from high-strength forged materials for critical service applications.

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Pipe Nipples

Hex, square, and close nipples in carbon steel, stainless steel, and alloy materials. Available in various lengths and thread types (NPT, BSPT, BSP).

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Screwed Fittings

Threaded connections for ease of installation in low-pressure systems. Compliant with ASME B16.11 standards and available in multiple sizes and finishes.

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Stainless Steel Flanges

Corrosion-resistant flanges in 304, 316, 321, and duplex grades. Suitable for marine, chemical, and food processing environments.

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Alloy Steel Fittings

High-temperature and high-pressure resistant fittings in chrome-moly, nickel alloys, and other specialty materials for power and petrochemical plants.

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Custom Fabrication

OEM and ODM services available. We support custom drawings, non-standard sizes, and special material requirements with full documentation and certification.

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Flange Gaskets & Bolts

Complete flange kits including spiral wound gaskets, RTJ, full-face gaskets, and high-tensile bolting sets for leak-free joints.

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Valves (Ball, Gate, Check)

Complementary valve solutions in forged and cast bodies, suitable for on/off and control applications in industrial piping systems.

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Stock & Distribution

Extensive inventory in China and Germany. Fast global shipping and one-stop shopping for mixed specifications and quantities.

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Certified Quality

Full material test reports (MTR), third-party inspection (SGS, BV), and compliance with PED 97/23/EC, AD2000, and ISO 9001 standards.

Why Choose Overwell(Jinan)?

Engineered for performance, backed by decades of expertise.

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Global Quality Standards

Manufacturing in strict compliance with 97/23/EC (PED), AD2000-Merkblatt W0/TRD100, ASME, and ISO standards. Full traceability and certification.

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Worldwide Distribution

Dual manufacturing bases in Jinan, China and a sales & distribution hub in Leipzig, Germany. Fast delivery to Europe, Americas, Asia, and Africa.

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One-Stop Supply

Extensive stock of flanges, fittings, valves, and accessories in assorted materials and sizes. Mix and match for complete project fulfillment.

20+
Years Experience
50+
Countries Served
2
Manufacturing Plants
1
EU Office (Germany)

Frequently Asked Questions

What materials do you offer for flanges and fittings?

We manufacture in carbon steel (A105, A350 LF2), stainless steel (304, 316, 321, 347, duplex), alloy steel (F5, F11, F22), and nickel alloys (Inconel, Monel).

Do you provide material certifications?

Yes, all products come with full Material Test Reports (MTRs) per EN 10204 3.1 or 3.2. Third-party inspection (SGS, BV) is available upon request.

Can you manufacture custom or non-standard parts?

Absolutely. We support OEM/ODM projects with custom drawings, special dimensions, and unique material requirements.

What are your main export markets?

We serve clients across Europe, North America, the Middle East, Southeast Asia, and Africa through our direct and agent network.

What is your production lead time?

Standard items: 2–4 weeks. Custom orders: 6–8 weeks. Urgent deliveries can be arranged based on stock availability.

Get in Touch

We're available 24/7 to assist with quotes, technical questions, and order support.

Company: Overwell(Jinan) Piping Materials Manufacturing Co., Ltd.

Tel: 0086-531-88870001

Tel: 0086-531-82689072

Fax: 0086-531-82689071

Email: [email protected]

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