Shanxi Xinshunda Flange Manufacturing Co., Ltd. supplies high-performance API 5000 LB flanges engineered for ultra-high-pressure wellhead, Christmas tree and oilfield drilling systems. Manufactured in strict compliance with API 6A, our 5000 LB flanges deliver exceptional pressure resistance, metal-to-metal sealing reliability and long-term structural integrity for harsh oil and gas exploration environments. Backed by 19 years of forging and precision machining expertise, we are a trusted provider for global oilfield, drilling and energy projects.
Product Description
API 5000 LB flanges are heavy-duty high-pressure flanges designed for wellhead and drilling equipment per API 6A, rated at 5000 psi (34.5 MPa) working pressure. They adopt Ring Type Joint (RTJ) sealing for metal-to-metal tightness under extreme pressure and temperature. Our API 5000 LB flanges are precision forged from high-strength alloy materials, fully heat treated and CNC machined to meet stringent dimensional and performance requirements. They are widely used in wellheads, Christmas trees, manifolds and high-pressure drilling systems.
Product Feature and Application
Key Features
- Ultra-high-pressure rating 5000 psi for critical oilfield service
- Full compliance with API 6A dimensional and performance standards
- RTJ metal-to-metal sealing for zero leakage under extreme conditions
- High-strength forging and controlled heat treatment for superior mechanical properties
- High dimensional precision and interchangeability with wellhead equipment
- Excellent high-temperature, corrosion and fatigue resistance
- Full material traceability and complete quality documentation
- Available in multiple end types to match wellhead assemblies
Typical Applications
- Oil and gas wellhead equipment
- Christmas tree and manifold systems
- Drilling rig high-pressure piping
- Well control and pressure testing systems
- Offshore and onshore drilling projects
- High-pressure oilfield transmission pipelines
- Petroleum production and processing facilities
Product Parameter
| Standard | API 6A, 5000 LB / 5000 psi |
| Working pressure | 5000 psi (34.5 MPa) |
| Test pressure | 7500 psi |
| Nominal size | 1-13/16″ – 11″ |
| Face type | Ring Type Joint (RTJ) – R / RX / BX |
| Temperature range | −60 °C to +345 °C (K to Y rating) |
| Materials |
Carbon steel: A105N, A350 LF2 Alloy steel: A182 F11, F22, F91 Stainless steel: F304, F316, F316L, F321, F347 |
| Connection types | Weld Neck, Blind, Threaded, Integral, DSA |
| Certification | API 6A certificate, EN 10204 3.1 MTC |
| Performance level | PR1, PR2 available |
Production Details
Each API 5000 LB flange is manufactured under full-process quality control:
- Raw material inspection with mill certification and spectral analysis
- Precision closed-die forging for optimized grain structure and strength
- Controlled heat treatment to meet mechanical property requirements
- CNC machining for high accuracy of dimensions, RTJ grooves and bolting
- 100% dimensional inspection using CMM and precision gauges
- Magnetic particle (MT) and ultrasonic (UT) non-destructive testing
- Hydrostatic testing to verify pressure integrity and safety
- Anti-corrosion surface treatment and permanent stamping
- Full traceability from raw material to finished product
Production Display
Our ISO 9001 certified workshop is equipped with large tonnage forging presses, high-precision CNC machining centers, dedicated heat treatment furnaces and professional NDT laboratories. We maintain strict process control and complete quality records. Third-party inspection by SGS, BV, TÜV or customer-authorized agencies is available on request.
Packaging & Transportation
- Surface treatment: Anti corrosion oil, varnish, black paint or custom coating
- Packaging: Protective wrapping, reinforced wooden cases, steel pallets
- Labeling: Heat number, size, class, material, standard, batch, API mark
- Documents: Commercial invoice, packing list, certificate of origin, API MTC
- Transportation: Sea, air and express delivery for global oilfield projects
After-sales Service
We provide full-life cycle technical support for API 5000 LB flanges:
- Professional consultation on wellhead matching and installation
- Custom design for special sizes, materials and connection types
- Timely response to after-sales inquiries and quality claims
- On-site technical guidance and remote support
- Stable long-term supply for large-scale oilfield projects
Why Choose Shanxi Xinshunda?
- 19 years of professional flange manufacturing serving global oil and gas clients
- Full compliance with API 6A and international quality standards
- Advanced forging and machining capabilities for high-pressure flanges
- Strict quality control and complete testing documentation
- Competitive factory pricing and reliable on-time delivery
- Multilingual service and global logistics support
Contact us today for catalogs, quotations or customized solutions for your API 5000 LB flange oilfield projects.
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