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High-quality carbon, stainless, and alloy steel flanges & fittings. ASME, ANSI, DIN, JIS standards. Exporting globally since 1998.
Langfang Dingyang Flange & Pipe Fitting Co., Ltd – A trusted name in industrial piping solutions since 1998.
Langfang Dingyang is one of the leading companies in China specializing in the export of pipe fittings, flanges, tubes, and valves. Since our founding in 1998, we have developed a complete production system and become a professional, competitive group in the global market.
Our 100-acre manufacturing facility is equipped with advanced production equipment and staffed by experienced technical professionals. We specialize in carbon, alloy, and stainless steel products meeting international standards including ASME, ANSI, JIS, DIN, and NPT.
We hold "100% customer satisfaction" as our goal, providing timely and efficient after-sales service to clients worldwide.
Premium flanges and pipe fittings engineered for durability, precision, and performance across industries.
High-strength forged carbon steel flange meeting ANSI B16.5 standards. Ideal for high-pressure applications.
Standard: ANSI B16.5 | Material: Carbon Steel
Corrosion-resistant stainless steel flange for chemical, marine, and food processing industries.
Standard: ANSI B16.5 | Material: Stainless Steel
High-performance alloy steel flange for extreme temperature and pressure environments.
Standards: ASTM A694, A350, A182
Seamless butt-welded carbon steel fittings for reliable pipeline connections.
Standard: ANSI B16.9 | Type: Butt Weld
Durable stainless steel butt-welded fittings with excellent corrosion resistance.
Standard: ANSI B16.9 | Material: Stainless Steel
Specialized alloy fittings for high-temperature and high-pressure industrial systems.
Grades: A420WPL6, A860, WP11, WP9
Threaded fittings available in 150LB and 3000LB pressure classes for easy installation.
Pressure: 150LB / 3000LB | Type: Threaded
High-strength forged wheels for industrial and railway applications.
Application: Industrial & RailwayDecades of manufacturing excellence, global certifications, and customer-first service.
ISO, ASME, ANSI, JIS, DIN, and NPT compliant. Full traceability and inspection reports available.
Efficient logistics network ensures on-time delivery to over 50 countries. FOB, CIF, DDP options.
Direct factory pricing with volume discounts. Low price, first quality – guaranteed.
Answers to common questions about our products, ordering, and services.
We manufacture products in carbon steel, stainless steel, and alloy steel. Specific grades include ASTM A105, A350 LF2, A182 F304/F316, A694, A234 WPB, and more.
Our flanges and fittings comply with ANSI, ASME, B16.5, B16.9, JIS, DIN, NPT, ISO, and GB/T standards. Custom specifications are also available.
Yes, we offer OEM and ODM services. Send us your drawings or specifications and we’ll manufacture to your exact requirements.
Standard products: 15–20 days. Custom orders: 25–35 days. Express production available upon request.
Yes, we provide samples for quality evaluation. Contact us with your requirements.
Get in touch for quotes, samples, or technical support. We respond within 24 hours.
Email: [email protected]
Phone: 86-316-5120812
WhatsApp: +8615801556607
Skype: chinamaker99
Address: Room 1-3-908, Zijincheng Commercial Building, Guangyang District, Langfang City, Hebei Province, China
For immediate assistance, visit our official website or contact us via WhatsApp or email.
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