Haihao Group Supplies ASME B16.5 A105 Blind Flanges for High-Pressure Pipeline Project in Singapore
As industrial facilities in Southeast Asia continue upgrading their pipeline systems, the demand for high-pressure flange components capable of operating under demanding service conditions is increasing. Recently, Haihao Group completed the production and shipment of a batch of A105 blind flanges for a customer in Singapore, supporting a pipeline project that requires reliable isolation and maintenance capabilities.
The order included multiple sizes of blind flanges manufactured according to ASME standards, ranging from 3-inch to 20-inch diameters. Several of the products were designed with Ring Type Joint (RTJ) sealing surfaces and pressure ratings up to Class 2500, demonstrating the project’s requirement for secure sealing performance under elevated pressure conditions.
A Mix of RTJ and RF Blind Flanges for Different Service Requirements
Unlike standard piping applications, large industrial projects often require different flange configurations depending on pressure class, operating environment, and maintenance strategy.
For this shipment, Haihao Group supplied:
- 3″ Class 2500 RTJ Blind Flange
- 8″ Class 2500 RTJ Blind Flange
- 10″ Class 2500 RTJ Blind Flange
- 12″ Class 2500 RTJ Blind Flange
- 20″ Class 600 RF Blind Flange
Manufactured from carbon steel forging material equivalent to ASTM A105 specifications, these components were prepared for installation in demanding pipeline systems where isolation integrity is critical.
The ASME B16.5 blind flange remains one of the most widely specified flange types in refinery, petrochemical, offshore, and gas transmission projects due to its ability to completely close pipeline sections while maintaining pressure containment.
Why High-Pressure Blind Flanges Matter
Pipeline shutdowns, equipment maintenance, and future system expansion all require dependable isolation points. This is where a properly engineered Class 2500 RTJ blind flange becomes essential.
Compared with lower-pressure connections, RTJ designs provide:
- Enhanced sealing performance under extreme pressure
- Improved resistance to leakage
- Greater reliability during thermal cycling
- Long-term performance in critical process systems
For operators, selecting a qualified Class 2500 RTJ blind flange can significantly reduce operational risks and maintenance costs over the lifecycle of the facility.
Quality Control Focused on Critical Service Applications
Although blind flanges appear to be relatively simple components, high-pressure applications demand strict manufacturing control.
For this Singapore order, Haihao Group’s inspection team paid particular attention to:
- Forging quality verification
- Dimensional tolerance inspection
- RTJ groove machining accuracy
- Raised face finish verification
- Surface protection before shipment
- Material traceability documentation
These quality procedures help ensure that every ASME B16.5 blind flange supplied by Haihao Group meets the dimensional and performance requirements expected by project engineers and end users.
Supporting Singapore’s Industrial Development
Singapore remains one of Asia’s most important hubs for refining, petrochemical processing, LNG infrastructure, and energy-related industries. Projects in these sectors frequently require pressure-retaining components capable of meeting international engineering standards.
The supplied A105 blind flange products are suitable for applications including:
Refinery Pipelines
Used to isolate process lines during inspection and maintenance activities.
Petrochemical Facilities
Provide reliable sealing solutions for high-pressure process units.
LNG and Gas Processing Plants
Support safe operation in transmission and distribution systems.
Storage Terminals
Enable secure isolation of piping and equipment during maintenance.
Industrial Utility Networks
Applied in steam, water, and process service pipelines.
More Than a Flange Supplier
This shipment reflects Haihao Group’s ability to support customers with both standard and project-specific flange requirements.
Beyond blind flanges, Haihao Group manufactures:
- Welding neck flanges
- Slip-on flanges
- Spectacle blinds
- Spacer rings
- Pipe fittings
- Branch connections
- Forged components
- Custom-engineered pipeline products
From small-diameter fittings to large-scale industrial flanges, our production capabilities support projects across the oil & gas, petrochemical, power generation, and infrastructure sectors.
For customers seeking dependable A105 blind flange solutions, Haihao Group continues to provide quality manufacturing, international project experience, and responsive technical support.
FAQ
What is the purpose of a blind flange?
A blind flange is used to close the end of a piping system, pressure vessel, or equipment nozzle, allowing future maintenance and system expansion.
What is the difference between RF and RTJ blind flanges?
RF (Raised Face) flanges use a gasket compressed between raised sealing surfaces, while RTJ (Ring Type Joint) flanges use a metal ring gasket designed for higher-pressure applications.
Why is ASTM A105 commonly used for blind flanges?
ASTM A105 provides excellent strength, machinability, and weldability, making it one of the most widely used forged carbon steel materials for industrial flanges.
Where are Class 2500 blind flanges typically used?
They are commonly used in high-pressure oil & gas, petrochemical, offshore, and refinery systems where secure sealing is essential.
Can Haihao Group manufacture custom blind flanges?
Yes. Haihao Group can produce blind flanges according to ASME, EN, DIN, BS, JIS, and project-specific drawings, including special materials and non-standard dimensions.