Stainless Steel Threaded Flange

Longan Stainless Steel Threaded Flange Manufacturer provides advanced non-weld connection solutions for vibration-intensive industrial pipelines. Designed for LNG filling arms, shale gas wellheads, offshore platforms, petrochemical plants, and vacuum systems, this intelligent flange combines anti-loosening thread engineering with carbon nano-sealing technology to improve safety, installation speed, and operational efficiency.

Engineered for High-Vibration and Extreme Industrial Conditions

Intelligent Locking Structure for Stable Connections

• Dual-lead anti-loosening thread design minimizes thread jump under seismic and axial vibration conditions.
• 30° wedge locking surface improves preload retention and reduces fretting wear.
• Self-compensating elastic thread structure extends anti-vibration service life beyond 20 years.
• Suitable for LNG stations, shale gas extraction systems, offshore drilling equipment, and power generation pipelines.

Verified Dynamic Performance

The Longan passed demanding vibration and sealing performance tests under simulated industrial conditions.

Test Scenario	Traditional Threaded Flange	Longan LockThread™	Improvement
Seismic vibration (0.5g PGA)	27% thread jump rate	0 thread jump	100% improvement
Thermal cycle (-50℃ to 150℃)	10⁻³ mbar·L/s leakage	≤10⁻⁷ mbar·L/s	4-level sealing upgrade
Axial vibration (30Hz × 8h)	38% preload loss	≤2% attenuation	95% reduction
LNG low temperature sealing	Standard performance	22% stronger bite force	Improved stability
Salt spray corrosion	Standard anti-rust	0.001mm/year corrosion	500× higher resistance

Faster Installation with Lower Operating Costs

Welding-Free Assembly Saves Labor and Energy

Compared with welded flange systems, the Longan Stainless Steel Threaded Flange significantly reduces installation complexity and field labor requirements.

Installation Comparison	Welded Flange	LockThread™ Threaded Flange
Installation time per set	45 minutes	8 minutes
Energy consumption	18kWh	0.5kWh
Technician requirement	2 certified welders	1 standard technician
CO₂ emissions per 100 sets	86kg	12kg

Reduced Downtime for Industrial Projects

No hot work or welding permits required during installation.

Faster assembly improves pipeline commissioning efficiency.

Easier flange replacement during shutdown maintenance.

Reduced manpower requirements help lower total project cost.

Advanced Sealing and Corrosion Protection Technology

Carbon Nano Sealing Layer

Carbon nano-modified sealing layer improves leak prevention under high pressure and thermal cycling.

Maintains stable sealing performance during repeated temperature fluctuations.

Suitable for vacuum systems with helium leakage requirements below 1×10⁻⁹ mbar·L/s.

PTFE-Graphene Anti-Corrosion Protection

Threads are impregnated with PTFE-graphene composite paste.

Excellent resistance against salt spray, crude oil, moisture, and chemical exposure.

Prevents sulfide stress cracking in sour gas environments containing H₂S.

Long-Term Durability in Harsh Media

Thread wear remains below 0.01mm/year in crude oil and sand mixed flow conditions.

Maintains sealing integrity during offshore platform swing and vibration.

Designed for long-term industrial pipeline reliability.

Why Choose Longan as Your Flange Supplier?

Full In-House Manufacturing Capability

Longan controls the complete production process from raw material forging to CNC machining and final inspection.

Forging, machining, drilling, threading, and testing completed in-house.

Manufacturing capability for flanges up to 4 meters in diameter.

Digital ERP production management ensures full traceability.

Paperless workshop management improves production accuracy and quality consistency.

International Quality Standards

API seismic performance verification.

CE certification available.

Quality Management System certified.

Environmental Management System certified.

UL ECV environmental product labeling support.

CBAM compliance support for European market requirements.

Flexible OEM and Custom Manufacturing

Customized dimensions of Stainless Steel Threaded Flange and non-standard flange production available.

Stainless steel and special alloy material options.

Thread specification customization based on regional standards.

Technical drawing support for engineering contractors and EPC projects.

What Applications Is it Suitable For?

Oil and Gas Industry

Shale gas wellhead systems

LNG loading and unloading arms

Refinery process pipelines

Sour gas transportation systems

Offshore and Marine Engineering

Deep sea swing pipelines

Offshore platform vibration systems

Corrosion-sensitive marine applications
Energy and Industrial Infrastructure

Power generation plants

Chemical processing pipelines

Vacuum process systems

Heavy industrial vibration equipment

Technical Support and Factory Service

Engineering Assistance

Technical consultation before project purchasing.

Material selection recommendations.

Flange matching support for pipeline systems.

Drawing confirmation before production.

Flexible Commercial Support

Competitive direct factory pricing.

Free samples available for evaluation.

OEM branding support.

Production lead time normally within 2–4 weeks.

Payment and Export Service

T/T, L/C, and D/P accepted.

Export support for global industrial buyers.

Experienced international logistics coordination.

The Longan Stainless Steel Threaded Flange with Longan is designed for industries where sealing integrity, vibration resistance, installation efficiency, and corrosion protection directly affect operational safety and maintenance costs. By combining intelligent locking technology, advanced sealing materials, and full-process manufacturing control, Longan delivers dependable flange solutions for demanding industrial projects worldwide.