Looking for premium lapped flanges? As leading China suppliers and a certified factory, we provide high-reliability flange connections designed for leak-proof seals in demanding industrial piping systems.
Our Lapped Flanges are meticulously engineered to provide superior sealing performance in the most demanding industrial environments. Designed as a high-reliability connection solution, the lapped flange consists of a precise overlapping architecture that ensures a leak-proof seal when bolted together with a compatible gasket. This specialized design is specifically optimized for piping systems where security, pressure maintenance, and resistance to thermal expansion are non-negotiable requirements.
Utilizing high-grade materials including carbon steel, stainless steel, and alloy steel, these flanges are built to withstand high-pressure and high-temperature conditions while offering exceptional resistance to corrosion. Whether integrated into petrochemical plants, oil and gas pipelines, or water treatment facilities, our lapped flanges provide a robust, cost-effective solution that accommodates slight misalignments without compromising the integrity of the system seal.
Detailed Parameters
| Pressure Rating | PN6 - PN40 / Class 150 - Class 2500 | Size Range | DN10 - DN2000 / ½" - 24" / S.A 12" - 60" |
|---|---|---|---|
| Carbon Steel | ASTM A105, P235GH, P245GH, P250GH, P265GH, ST37-2 | Stainless Steel | ASTM A182 / 304 / 306 |
| Compliance Standards | ASME, EN, JIS, DIN, BS, KS, GOST, SABS, ATK | Surface Coatings | Black Paint, Galvanized, Grease, Epoxy Paint |
| Design Types | Concentric and Eccentric Lapped Flanges | Primary Function | Leak-resistant pipeline access and connection |
| Application Temp | High-temperature industrial environments | Pressure Ability | Low-pressure to High-pressure applications |
Key Advantages
Superior Sealing
The unique overlapping design creates a tight, leak-proof connection critical for hazardous materials.
Enhanced Durability
Constructed from high-grade alloys and stainless steel for maximum corrosion and thermal resistance.
Misalignment Tolerance
Designed to accommodate slight offsets during installation, ensuring a reliable seal even in tight spots.
Versatile Application
Ideal for oil, gas, petrochemical, and power generation systems worldwide.
Easy Maintenance
Simplified disassembly and installation processes reduce downtime during system upgrades.
Global Standardized
Fully compliant with ASME, DIN, JIS, and other international manufacturing standards.
Product Gallery
Management Platforms
Material Tracking
Full traceability of ASTM/EN grade materials from mill to final delivery.
Precision Machining
Advanced CNC processing ensures perfect overlap and concentricity for every unit.
Quality Assurance
Rigorous pressure testing and dimensional inspection per international standards.
Coating Control
Controlled application of epoxy and galvanized coatings for maximum protection.
Inventory Logistics
Efficient stock management for rapid dispatch of standard sizes (DN10-DN2000).
Technical Support
Expert guidance on selecting concentric vs eccentric flanges for your flow needs.
Investment Return Comparison
| Feature | Standard Flanges | Lapped Flanges | ROI Impact |
|---|---|---|---|
| Seal Reliability | Moderate | Exceptional | Lower Leakage Cost |
| Installation Speed | Standard | Faster (Tolerant) | Reduced Labor Hours |
| Material Life | Variable | High (Premium Grades) | Longer Cycle Life |
| Maintenance | Frequent Checks | Low Frequency | Reduced OpEx |
| Risk Mitigation | Basic | High-Pressure Rated | Lower Insurance Risk |
Frequently Asked Questions
Concentric lapped flanges have centered alignment for uniform flow, while eccentric lapped flanges have offset faces to prevent air pockets or handle slurry flow more efficiently.
Stainless steel (ASTM A182 / 304 / 306) is highly recommended for corrosive environments due to its inherent resistance to oxidation and chemical attack.
Yes, our lapped flanges are rated up to Class 2500 and PN40, making them ideal for high-pressure systems in oil, gas, and petrochemical industries.
Yes, a gasket is placed between the flat and raised surfaces to ensure a completely leak-proof and airtight seal.
We strictly adhere to ASME, EN, JIS, DIN, BS, KS, GOST, SABS, and ATK standards to ensure global compatibility and safety.
The overlapping design allows for a higher tolerance of slight misalignments during bolting, which simplifies installation in complex piping networks.
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