Premium Grooved Pipe Fittings & Couplings
OEM Manufacturer of High-Quality Ductile Iron Grooved Fittings, Valves, and Castings. Trusted in Water, Oil, Gas, and Power Transmission Systems Worldwide.
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OEM Manufacturer of High-Quality Ductile Iron Grooved Fittings, Valves, and Castings. Trusted in Water, Oil, Gas, and Power Transmission Systems Worldwide.
Founded in 1986, Weifang Lulin Machinery Co., Ltd. is a high-tech enterprise integrating R&D, production, sales, and service. We specialize in manufacturing ductile iron grooved pipe fittings, ductile iron valves, cast iron machinery parts, and OEM castings.
Our products are widely used in civil and industrial applications including water supply, oil pipelines, gas distribution, and power transmission systems.
High-performance ductile iron grooved fittings designed for reliability, durability, and leak-free performance in critical piping systems.
Lulin Ductile Cast Standard Rigid Coupling for secure, maintenance-free connections.
Lulin Ductile Cast Standard Flexible Coupling with vibration absorption.
Lulin Ductile Cast Equal Tee for 90° branch connections.
Lulin Ductile Cast Reducing Tee Grooved for variable line sizes.
Lulin Ductile Cast 90° Elbow for tight-radius turns.
Lulin Ductile Cast Grooved Cross for four-way connections.
Lulin Ductile Cast Mechanical Tee Grooved/Threaded for branch lines.
Concentric and eccentric reducers for diameter transitions.
Lulin Ductile Cast Cap for terminating grooved piping systems.
Ductile iron flange for bolted connections in piping networks.
Special angle elbow for directional changes in tight spaces.
Lulin Ductile Cast Angle Pad Coupling for offset alignment.
Engineered for performance, safety, and longevity in demanding industrial environments.
All products meet or exceed FM and UL safety standards for fire protection and industrial use.
Established in 1986, we bring decades of expertise in ductile iron casting and machining.
Trusted by customers in over 50 countries with reliable international shipping and support.
We offer custom ductile iron castings and OEM manufacturing services for unique requirements.
We strictly adhere to international quality management standards.
ISO 9001
ISO 14001
ISO 50001
UL Listed
FM Approved
Every product undergoes rigorous testing including pressure testing, dimensional inspection, material analysis, and coating thickness verification to ensure compliance with international standards.
Our Q3 factory inspections by UL and FM in 2022 confirm our ongoing commitment to quality and safety.
Stay updated with our latest industry participation and company milestones.
Weifang Lulin Machinery Co., Ltd. participated in the Guangzhou International Fire Exhibition on August 24, 2022.
November 30, 2022UL (Underwriters Laboratories Inc.) conducted a factory inspection on August 3, 2022, confirming our compliance with safety standards.
November 30, 2022FM (Factory Mutual) completed their Q3 factory inspection on August 3, 2022, validating our manufacturing processes.
November 30, 2022Integrity management and sincere service are our tenets. To be the most favored brand by customers and the industry leader is our pursuit.
OngoingGet in touch for product inquiries, catalogs, or custom OEM casting requests.
Our grooved fittings and couplings are certified by FM and UL. Please send an email to share your detailed product requirements.
Visit Official Website to ContactFor fastest response, email kaylee@lulinltd.com with your requirements.
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