ASTM B564 UNS N06625 Socket Weld Flanges and Blind Flanges Supplied to Singapore for Sour Service Applications
Haihao Group recently completed the production and shipment of a batch of UNS N06625 Flange products for a valued customer in Singapore. The order included socket weld raised face flanges and blind flanges manufactured from nickel alloy UNS N06625 in accordance with ASTM B564 and ASME B16.5 standards.
Designed for corrosive and sour service environments, these flanges were supplied with heat treatment and material properties suitable for applications involving hydrogen sulfide (H₂S), meeting the requirements of NACE MR0175.
Order Details
The shipment included the following products:
| Product | Size | Schedule | Pressure Class | Material | Standard |
| Socket Weld RF Flange | 3/4″ | SCH 40S | 150# | UNS N06625 | ASTM B564 / ASME B16.5 |
| Socket Weld RF Flange | 3/4″ | SCH 40S | 300# | UNS N06625 | ASTM B564 / ASME B16.5 |
| Socket Weld RF Flange | 3/4″ | SCH 40S | 600# | UNS N06625 | ASTM B564 / ASME B16.5 |
| Socket Weld RF Flange | 1″ | SCH 40S | 150# | UNS N06625 | ASTM B564 / ASME B16.5 |
| Socket Weld RF Flange | 1″ | SCH 40S | 300# | UNS N06625 | ASTM B564 / ASME B16.5 |
| Socket Weld RF Flange | 1″ | SCH 40S | 600# | UNS N06625 | ASTM B564 / ASME B16.5 |
| Blind RF Flange | 2″ | — | 150# | UNS N06625 | ASTM B564 / ASME B16.5 |
All products were supplied with complete material traceability and quality documentation.
Why UNS N06625 Is Ideal for Sour Service
The primary material used in this project was nickel alloy UNS N06625, commonly known as Inconel 625. This alloy is widely recognized for its exceptional resistance to aggressive corrosive environments.
The supplied UNS N06625 Flange products offer:
- Outstanding resistance to pitting corrosion
- Excellent protection against crevice corrosion
- Superior performance in chloride-rich environments
- High tensile and yield strength
- Excellent resistance to sulfide stress cracking
- Long service life in offshore and sour gas applications
For customers operating in harsh environments, a UNS N06625 Flange provides a reliable solution that minimizes maintenance requirements and reduces operational risks.
NACE MR0175 compliant UNS N06625 flanges ready for shipment
Compliance with ASTM B564 and ASME B16.5
Every ASTM B564 Flange in this shipment was manufactured according to strict dimensional and material requirements.
Key standards included:
ASTM B564
Defines the requirements for forged nickel alloy flanges, fittings, and forged components.
ASME B16.5
Specifies dimensions, tolerances, pressure-temperature ratings, and marking requirements for pipe flanges and flanged fittings.
By complying with these international standards, each ASTM B564 Flange ensures compatibility with global piping systems and engineering specifications.
NACE MR0175 Compliance for Corrosive Environments
One of the critical project requirements was suitability for sour service operation.
The supplied NACE MR0175 Flange products were manufactured using materials suitable for environments containing hydrogen sulfide (H₂S). Material selection, manufacturing control, and heat-treatment procedures were carefully managed to satisfy the demanding requirements of the oil and gas industry.
A properly manufactured NACE MR0175 Flange helps prevent sulfide stress cracking and improves long-term operational safety in upstream and downstream facilities.
Heat Treatment for Enhanced Material Performance
Heat treatment was included as part of the production process.
For nickel alloy components, proper heat treatment contributes to:
- Improved metallurgical stability
- Enhanced corrosion resistance
- Better mechanical performance
- Reduced residual stress
- Consistent material properties throughout the component
This process is especially important for critical pressure-containing equipment operating under severe service conditions.
Comprehensive Quality Control
To guarantee product reliability, Haihao Group implemented a rigorous quality control procedure throughout manufacturing.
Inspection activities included:
- Raw material verification
- Positive Material Identification (PMI)
- Dimensional inspection
- Surface examination
- Heat-treatment verification
- Marking inspection
- Final visual inspection
- Packing verification
Each UNS N06625 Flange was manufactured under strict traceability controls to ensure compliance with customer specifications.
Applications of Nickel Alloy Socket Weld and Blind Flanges
The ASTM B564 Flange products supplied for this project are commonly used in:
- Offshore oil and gas platforms
- Subsea production systems
- Refineries
- LNG facilities
- Petrochemical plants
- Chemical processing equipment
- Marine engineering projects
Their exceptional corrosion resistance makes them particularly suitable for environments where conventional stainless steel or carbon steel components may not provide sufficient service life.
Haihao Group’s Expertise in Nickel Alloy Flanges
Haihao Group supplies a wide range of nickel alloy piping products, including:
- Socket weld flanges
- Blind flanges
- Weld neck flanges
- Slip-on flanges
- Forged fittings
- Buttweld fittings
- Customized forged components
Whether the project requires standard products or special materials for corrosive service, our engineering and production teams can provide tailored solutions with complete quality documentation.
Looking for ASTM B564 UNS N06625 Flanges?
If your project requires UNS N06625 Flange products, ASTM B564 Flange solutions, or NACE MR0175 Flange components for sour service applications, Haihao Group can provide reliable manufacturing support and global delivery.
Contact our sales team today to discuss your technical requirements and receive a customized quotation.