Haihao Group Ships ASTM A105 Blind Flanges for High-Pressure Oil & Gas Applications to Singapore
Haihao Group recently completed the production and shipment of a batch of ASTM A105 blind flanges for a customer in Singapore. The order includes both ASME B16.5 blind flanges and API 6A blind flanges, covering pressure ratings from Class 900 and Class 2500 up to 10,000 PSI, making them suitable for demanding oil & gas, petrochemical, and high-pressure pipeline applications.
Manufactured from forged ASTM A105 carbon steel, these blind flanges were produced under strict quality control procedures to ensure dimensional accuracy, sealing performance, and long-term service reliability.
Shipment Details
| Product | Size | Pressure Rating | Standard | Material |
| RTJ Blind Flange | 4 1/16″ | 10,000 PSI | API 6A Type 6BX | ASTM A105 |
| RTJ Blind Flange | 7 1/16″ | 10,000 PSI | API 6A Type 6BX | ASTM A105 |
| RTJ Blind Flange | 1 13/16″ | 10,000 PSI | API 6A Type 6BX | ASTM A105 |
| RF Blind Flange | 10″ | Class 900 | ASME B16.5 | ASTM A105 |
| RTJ Blind Flange | 10″ | Class 900 | ASME B16.5 | ASTM A105 |
| RTJ Blind Flange | 1″ | Class 2500 | ASME B16.5 | ASTM A105 |
| RTJ Blind Flange | 8″ | Class 2500 | ASME B16.5 | ASTM A105 |
| RTJ Blind Flange | 3″ | Class 2500 | ASME B16.5 | ASTM A105 |
| RTJ Blind Flange | 10″ | Class 2500 | ASME B16.5 | ASTM A105 |
| RTJ Blind Flange | 1 1/2″ | Class 2500 | ASME B16.5 | ASTM A105 |
| RTJ Blind Flange | 12″ | Class 2500 | ASME B16.5 | ASTM A105 |
High-Pressure Blind Flanges for Critical Isolation Service
Blind flanges play a vital role in pipeline systems by providing secure end closures, pressure containment, and maintenance isolation points. This shipment combines both raised face (RF) and ring-type joint (RTJ) designs to accommodate different sealing requirements.
The ASTM A105 blind flange remains one of the most widely specified solutions for carbon steel piping systems because of its excellent mechanical strength, machinability, and cost-effectiveness. For high-pressure environments, RTJ configurations provide superior sealing integrity, especially in applications involving elevated pressures and temperature fluctuations.
The customer’s order included multiple sizes of ASTM A105 blind flange products, ranging from compact 1-inch Class 2500 units to large 12-inch Class 2500 flanges designed for demanding process systems.
ASTM A105 RTJ blind flanges and API 6A Type 6BX blind flanges manufactured by Haihao Group
API 6A Type 6BX Blind Flanges for Oilfield Equipment
A notable portion of this shipment consisted of API 6A 6BX flange products rated at 10,000 PSI. These flanges are commonly used in wellhead systems, Christmas trees, drilling equipment, and pressure-control assemblies.
Manufacturing API 6A 6BX flange components requires strict dimensional control because sealing performance depends on precise machining of the RTJ groove and flange face. Haihao Group’s machining and inspection teams verified all critical dimensions before shipment to ensure compliance with project specifications.
For customers operating in upstream oil and gas sectors, API 6A 6BX flange products provide dependable performance under extreme pressure conditions.
Strict Manufacturing and Inspection Procedures
At Haihao Group, every forged flange undergoes comprehensive quality control throughout the production process.
Inspection procedures typically include:
- Raw material verification
- Dimensional inspection
- Surface examination
- RTJ groove verification
- Mechanical property testing
- Positive material identification (PMI) when required
- Final visual inspection before packing
These procedures help ensure that each ASTM A105 blind flange meets both international standards and customer-specific requirements.
Supporting Global Energy and Industrial Projects
Singapore remains an important hub for refinery, petrochemical, offshore, and energy infrastructure projects. Haihao Group regularly supplies flanges, fittings, pipes, and customized pipeline components to customers throughout Southeast Asia.
Whether the requirement is a standard ASTM A105 blind flange, a high-pressure API 6A 6BX flange, or a custom-engineered forging, our team can provide manufacturing support, quality documentation, and international logistics services.
With more than 40 years of experience in pipeline products, Haihao Group continues to serve customers worldwide with reliable solutions for critical piping systems.
Contact Haihao Group
Looking for a trusted supplier of forged carbon steel flanges, API 6A products, or high-pressure pipeline components?
Haihao Group offers:
- Blind Flanges (RF & RTJ)
- Weld Neck Flanges
- Spectacle Blinds
- Orifice Flanges
- Custom Forgings
- Pipe Fittings and Steel Pipes
Contact our sales team today for technical support and a competitive quotation for your next project.