Lap Joint Flanges (typically used in conjunction with a Stub End) are the preferred choice for piping systems requiring frequent disassembly, cleaning, or rapid alignment. At Jiangyin Zhonghai Precision Machinery Co., Ltd., our Lap Joint Flanges combine high-strength forging expertise with meticulous machining accuracy.

Since the flange itself does not contact the internal medium, we offer "Multi-Material" solutions—utilizing high-performance alloy stub ends paired with carbon steel flanges. This approach significantly reduces material costs while maintaining system integrity. Leveraging our 4-meter machining capacity and 10-ton single-component forging capability, Zhonghai provides both standard and bespoke solutions for the most demanding industrial environments.

Core Advantages
·In-house Integrated Manufacturing: We operate a full production line—from raw forging and heat treatment to CNC turning and drilling—ensuring total quality control at every stage.
·Certified Quality Excellence: ISO 9001 certified, with PED (Pressure Equipment Directive), TUV, and TS qualifications, meeting the highest international safety and regulatory standards.
·Heavy-Scale Production Power: Our size range covers 1/2" to 60", with pressure ratings up to Class 2500. We are one of the few manufacturers capable of handling components up to 4 meters in diameter and 10 tons in weight.
·Rapid Assessment & Delivery: For non-standard projects, our engineering team provides fast technical evaluations and quotations based on your drawings or key parameters (OD, ID, thickness, bolt circle, etc.).

Key Features
·Unmatched Alignment Flexibility: The flange ring rotates freely on the pipe, simplifying bolt hole alignment and significantly reducing on-site installation time.
·Metallurgical Cost Optimization: Allows for the use of expensive corrosion-resistant alloys only for the stub end, while the flange can be made of economical carbon steel.
·Enhanced Forged Integrity: Our forging process eliminates internal defects and improves grain flow, enhancing fatigue resistance under high-pressure cycles.
·Precision Facing: Strict adherence to ASME and EN standards ensures surface flatness and roughness meet top-tier industry specifications for leak-free sealing.

Application Scenarios
·Corrosive Media Handling: Chemical and pharmaceutical lines where expensive alloy stub ends are required.
·Frequent Maintenance Systems: Production lines that require regular disassembly for cleaning or inspection.
·Confined Space Installation: Jobsites where rotating the entire pipe for alignment is difficult or impossible.
·Large-Scale Pressure Vessels: Interfaces for massive vessels and heavy machinery components up to 4 meters.