Shanxi Xinshunda Flange Manufacturing Co., Ltd. supplies ultra-high-pressure API 15000 LB flanges engineered for extreme-service wellhead, Christmas tree, manifold and pressure control systems in harsh oilfield environments. Manufactured in strict compliance with API 6A and API 6BX, our 15000 LB flanges deliver superior pressure-bearing capacity, metal-to-metal sealing reliability and long-term structural stability for onshore and offshore high-pressure operations. Backed by 19 years of professional forging and precision machining expertise, we are a qualified supplier for global oil, gas and energy projects.
Product Description
API 15000 LB flanges are ultra-high-pressure forged flanges designed for critical oilfield service in accordance with API 6A / 6BX, with a rated working pressure of 15000 psi (103.4 MPa). Equipped with precision-machined BX Ring Type Joint (RTJ) grooves, they provide zero-leakage metal-to-metal sealing under extreme pressure, temperature and vibration conditions. Our API 15000 LB flanges are manufactured from high-strength alloy steel forgings with full heat treatment and full-process quality control, making them ideal for wellheads, Christmas trees, manifolds, choke & kill systems and high-pressure transmission pipelines.
Product Feature and Application
Key Features
- Ultra-high-pressure rating 15000 psi for extreme oilfield service
- Full compliance with API 6A / 6BX dimensional and performance standards
- BX-type RTJ metal-to-metal sealing for zero leakage under harsh conditions
- High-strength closed-die forging with optimized grain structure
- Excellent high-temperature, corrosion, fatigue and impact resistance
- High-precision CNC machining and full interchangeability
- Full material traceability and complete quality documentation
- Suitable for long-term service in high-pressure production systems
Typical Applications
- Onshore & offshore ultra-high-pressure wellhead equipment
- Christmas tree and manifold assemblies
- Choke & kill line systems
- High-pressure drilling and well control equipment
- Pressure testing and stimulation systems
- Deep well and ultra-deep well production facilities
- Critical high-pressure oil/gas transmission pipelines
Product Parameter
| Standard | API 6A, API 6BX, 15000 LB / 15000 psi |
| Working pressure | 15000 psi (103.4 MPa) |
| Test pressure | 22500 psi |
| Nominal size | 1-13/16″ – 7 1/16″ |
| Face type | BX Ring Type Joint (RTJ) |
| Temperature rating | −60 °C to +345 °C (K to Y rating) |
|
Materials |
Alloy steel: A182 F11, F22, F91, 4130, 4140, 8630 Stainless steel: F316, F316L, F321, F347 |
| Connection types | Weld Neck, Blind, Integral, DSA |
| Certification | API 6A / 6BX Certificate, EN 10204 3.1 MTC |
| Performance level | PR2, PSL2, PSL3 |
Production Details
Each API 15000 LB flange is manufactured under full-process quality control:
- Raw material inspection with mill certification and spectral analysis
- Closed-die forging for uniform structure and enhanced mechanical strength
- Standardized heat treatment to meet hardness and tensile requirements
- High-precision CNC machining for RTJ grooves, bolting and dimensions
- 100% dimensional inspection via CMM and precision measuring tools
- Full NDT: magnetic particle testing (MT), ultrasonic testing (UT)
- Hydrostatic testing to verify pressure safety and sealing integrity
- Anti-corrosion surface treatment and permanent marking
- Full traceability from raw material to finished product
Production Display
Our factory is ISO 9001 & API Q1 certified, equipped with large-tonnage forging presses, high-rigidity CNC machining centers, automatic heat treatment lines and professional NDT laboratories. We implement strict process control and complete documentation. Third-party inspection by SGS, BV, TÜV or customer-appointed institutions is available upon 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, pressure class, material, standard, API mark, batch
- 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 15000 LB flanges:
- Professional consultation on wellhead matching, installation and operation
- Custom design for special sizes, materials and end connections
- 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 & gas clients
- Full compliance with API 6A / 6BX and international quality standards
- Advanced forging & machining capabilities for ultra high pressure flanges
- Strict quality control and complete testing & certification documents
- Competitive factory pricing and reliable on time delivery
- Multilingual sales & technical support and global logistics service
Contact us today for product catalogs, quotations or customized solutions for your API 15000 LB flange oilfield projects.
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