Haihao Group Supplies ASME B16.5 SA/A182 F53 Super Duplex Flanges for Singapore Industrial Project

Haihao Group has successfully completed the production and shipment of a batch of ASME B16.5 SA/A182 F53 flanges for a customer in Singapore. The order includes a 12-inch Welding Neck (WN) RF Flange Class 300 and a 1-inch Blind RTJ Flange Class 2500, both manufactured from Super Duplex Stainless Steel ASTM A182 F53.

To meet the customer’s stringent quality requirements for corrosive service, the products underwent comprehensive inspections and testing, including heat treatment verification, mechanical property testing, PMI inspection, corrosion testing, and metallographic examination. Every flange was protected with plastic end caps and packed in export-grade wooden cases to ensure excellent surface condition during transportation.

Product Specifications

Item	Specification
Product	Welding Neck Flange RF
Size	12″
Wall Thickness	SCH40S
Pressure Rating	Class 300
Standard	ASME B16.5
Material	ASTM A182 F53 Super Duplex Stainless Steel
Facing	Raised Face (RF)

 

Item	Specification
Product	Blind Flange RTJ
Size	1″
Pressure Rating	Class 2500
Standard	ASME B16.5
Material	ASTM A182 F53 Super Duplex Stainless Steel
Facing	Ring Type Joint (RTJ)

High-Performance ASME B16.5 SA/A182 F53 Flanges for Corrosive Environments

The ASME B16.5 SA/A182 F53 flange is widely used in offshore platforms, subsea equipment, desalination plants, petrochemical facilities, and other aggressive service environments where exceptional corrosion resistance and mechanical strength are essential.

For this Singapore project, the customer specified ASME B16.5 SA/A182 F53 flange products to ensure reliable performance under chloride-containing conditions. Super Duplex F53 combines high tensile strength with outstanding resistance to pitting, crevice corrosion, and chloride stress corrosion cracking, making it an ideal material for demanding industrial applications.

Comprehensive Testing to Meet Project Requirements

To satisfy the customer’s technical specifications, every ASME B16.5 SA/A182 F53 flange was subjected to a complete inspection program before shipment.

The quality documentation included:

• Heat Treatment Report
• Mechanical Property Report
• Positive Material Identification (PMI) Report with on-site inspection photographs
• Corrosion Test according to ASTM G48 Method A
• Metallographic Examination in accordance with ASTM E562 (400× Magnification)

The metallographic examination confirmed:

• Ferrite content: 50%
• Required range: 35%–55%
• Free from intermetallic phases
• Free from harmful precipitates

These results verify that the ASME B16.5 SA/A182 F53 flange meets the material performance requirements for critical corrosion-resistant applications.

Careful Protection During Manufacturing and Shipment

Super Duplex stainless steel requires careful handling to preserve its corrosion-resistant surface.

For this shipment, Haihao Group implemented several protective measures:

• Plastic protection caps installed on all flange sealing surfaces
• Surface protection throughout machining, inspection, and packing
• Individual packaging to prevent mechanical damage
• Export-grade wooden case packaging for international transportation

These measures ensure the products arrive at the customer’s site in excellent condition and are ready for installation.

Haihao Group Delivers Reliable Super Duplex Flange Solutions

With more than four decades of manufacturing experience, Haihao Group supplies high-performance pipeline components that comply with international standards and project-specific inspection requirements.

Our production capabilities include:

• Super Duplex Stainless Steel Flanges
• Duplex Stainless Steel Pipe Fittings
• Forged Fittings
• Butt Weld Fittings
• Steel Pipes
• Customized Pipeline Components

From material sourcing to final inspection, every product is manufactured under a strict quality management system to meet the expectations of customers in the oil & gas, offshore, petrochemical, marine, and energy industries worldwide.

If your project requires ASME B16.5 SA/A182 F53 flange products with PMI testing, corrosion testing, mechanical property reports, or third-party inspection, Haihao Group is ready to provide complete engineering support and dependable global delivery.