24″ ASME B16.5 A694 F65 RTJ Blind Flange Shipped to Indonesia with Low-Temperature Qualification
Haihao Group has completed the production and shipment of a 24-inch RTJ blind flange for an Indonesian pipeline project. Manufactured from ASTM A694 F65 material in accordance with ASME B16.5, the flange underwent heat treatment and full mechanical property verification to satisfy the project’s low-temperature service requirements.
For oil & gas transmission systems operating under high pressure and demanding environmental conditions, material reliability is just as important as dimensional accuracy. This shipment reflects Haihao Group’s ability to deliver custom-engineered flanges that meet both international standards and project-specific technical specifications.
Project Overview
| Product | Size | Pressure Class | Material | Standard | Surface Finish |
| RTJ Blind Flange | 24″ | Class 1500 | ASTM A694 F65 | ASME B16.5 | Black Painted |
ASTM A694 F65 RTJ Blind Flange for High-Pressure Pipelines
The ASTM A694 F65 RTJ blind flange was designed for a high-pressure transmission system where strength, sealing performance, and low-temperature toughness are critical.
Manufactured with a Ring Type Joint (RTJ) sealing face, the flange provides a reliable metal-to-metal seal under Class 1500 operating conditions. This sealing method is widely used in offshore platforms, LNG facilities, refinery units, and long-distance oil and gas pipelines where leak prevention is essential.
As a high-strength carbon steel forging, ASTM A694 F65 offers higher yield strength than conventional flange materials while maintaining excellent toughness after proper heat treatment. This combination makes it well suited for demanding pipeline applications in colder operating environments.
The ASTM A694 F65 RTJ blind flange supplied for this project was produced in strict compliance with ASME B16.5 dimensional requirements and customer specifications.
ASTM A694 F65 RTJ blind flange Class 1500 manufactured by Haihao Group
Quality Control for Low-Temperature Service
To ensure long-term reliability in service, Haihao Group implemented comprehensive manufacturing and inspection procedures throughout production.
| Inspection Item | Result |
| Manufacturing Standard | ASME B16.5 |
| Material Grade | ASTM A694 F65 |
| Heat Treatment | Completed to achieve specified mechanical properties |
| Mechanical Testing | Fully compliant with specification |
| Low-Temperature Qualification | Meets project low-temperature performance requirements |
| Surface Protection | Black paint applied before shipment |
These inspections ensure that every ASTM A694 F65 RTJ blind flange delivered by Haihao Group is ready for demanding industrial applications.
Why Choose Haihao Group for ASME B16.5 Flanges?
With more than four decades of manufacturing experience, Haihao Group supplies forged flanges, pipe fittings, and piping components to customers worldwide.
Our capabilities include:
- ASME B16.5 and ASME B16.47 forged flanges
- ASTM A694, ASTM A105, ASTM A350 LF2, stainless steel, duplex and nickel alloy materials
- Heat treatment and complete mechanical testing
- Low-temperature impact testing according to project requirements
- Third-party inspection support
- MTC EN 10204 3.1 / 3.2 documentation
- Export packaging and global logistics
Whether your project requires a single special flange or a complete piping package, Haihao Group can provide reliable manufacturing, strict quality assurance, and on-time delivery.
If you are looking for a trusted supplier of ASTM A694 F65 RTJ blind flange products manufactured to ASME B16.5, our engineering team is ready to support your next pipeline project.