Supplying high-pressure API 6A Type 6BX nickel alloy flanges to Singapore
Haihao Group recently completed the production and delivery of a batch of API 6A Type 6BX 10000 PSI weld neck (WN) RTJ flanges for a valued client in Singapore. These flanges, made from Nickel Alloy ASTM B564 UNS N06625, are designed for extreme pressure conditions and corrosive environments, meeting the stringent requirements of the NACE MR0175 standard for sour service applications.
Product Overview
The order included two key specifications:
8″ x 6″ WN RTJ Flange, 0.864″ Thickness
Pressure Rating: 10,000 PSI
Standard: API 6A Type 6BX
Material: Nickel Alloy ASTM B564 UNS N06625
Compliance: NACE MR-01-75
Application: Designed to match 6″ pipe connections in high-pressure systems.
6″ (4 1/16″) XXS WN RTJ Flange, 0.864″ Thickness
Bore Size: 4 1/16″
Wall Thickness: XXS (Extra Extra Strong)
Pressure Rating: 10,000 PSI
Standard: API 6A Type 6BX
Material: Nickel Alloy B564 UNS N06625
Compliance: NACE MR-01-75, for sour gas environments.
These flanges are engineered for high-performance use in offshore and subsea oil & gas systems, where both high pressure tolerance and corrosion resistance are critical.

API 6A Type 6BX nickel alloy flange
Why Choose UNS N06625 Nickel Alloy Flanges?
The UNS N06625 (Inconel 625) nickel alloy is known for its outstanding resistance to:
- Chloride-induced pitting and crevice corrosion
- Sulfide stress cracking (SSC) in sour service environments
- Oxidizing and reducing conditions
This makes it an ideal material for API 6A 10000 PSI flanges, particularly in offshore drilling, subsea pipelines, and wellhead systems.
Certified to Global Standards
All supplied Nickel Alloy WN RTJ flanges are:
- Forged and machined in accordance with API 6A Type 6BX
- 100% inspected and tested (dimensional, PMI, NDT, pressure testing)
- Delivered with full MTCs (EN 10204 3.1) and NACE MR0175 compliance certificates

Quality inspection of API 6A Type 6BX nickel alloy flange
Applications
These custom flanges are suitable for:
- Offshore and subsea oil & gas installations
- High-pressure wellhead equipment
- Sour gas and H2S-containing fluid systems
- Deepwater exploration systems requiring API 6A 6BX flanges with RTJ face
Why Work with Haihao Group?
Haihao Group has a long-standing reputation for delivering customized, high-performance flanges for the global energy sector. We provide:
- Complete material traceability
- Expertise in API, ASME, and ISO standards
- Support for offshore EPC contractors and oilfield service companies
If you need custom nickel alloy WN RTJ flanges for high-pressure or corrosive environments, contact Haihao Group for reliable supply and technical support. Email:sales@haihaogroup.com
Related Article:
How Nickel Alloy Becomes the Core of Corrosion Resistance in Ultra-High Pressure Flanges