Haihao Group Delivers High-Pressure RF Flanges in Super Duplex Materials to UAE Customer

Haihao Group has successfully completed the shipment of high-pressure RF flanges to a customer in the United Arab Emirates, supporting pipeline systems operating under demanding pressure and corrosion conditions.

This delivery includes figure-8 flanges (spectacle blinds) and blind flanges, manufactured from ASTM A240 UNS S31254 and ASTM A182 F44 super duplex stainless steel, both widely recognized for their exceptional strength and corrosion resistance in offshore and Middle East environments.

ASTM A182 F44 blind flange with threaded hole

Supplied Flange Specifications

All flanges were produced in strict accordance with project specifications, with precise dimensional control and pressure rating compliance:

• Figure-8 Flange (Spectacle Blind), RF
  Size: 4″, Pressure Class: 600
  Material: ASTM A240 UNS S31254

• Blind Flange, RF
  Size: 2″, Pressure Class: 600
  Material: ASTM A182 F44

• Blind Flange, RF with 1/2″ NPT Threaded Hole
  Size: 2″, Pressure Class: 600
  Material: ASTM A182 F44

• Figure-8 Flange (Spectacle Blind), RF
  Size: 6″, Pressure Class: 600
  Material: ASTM A240 UNS S31254

These Class 600 RF flanges are designed for reliable isolation, pressure testing, and flow control in high-pressure piping systems.

Material Advantages for UAE Applications

ASTM A240 UNS S31254 (254 SMO) offers outstanding resistance to pitting, crevice corrosion, and chloride-induced stress corrosion cracking, making it ideal for aggressive service conditions.

ASTM A182 F44 super duplex stainless steel provides high mechanical strength combined with excellent corrosion resistance, particularly suited for oil, gas, and petrochemical pipelines in the UAE.

The combination of these materials ensures long service life and reduced maintenance in harsh operating environments.

Precision Machining and Quality Assurance

Each RF flange was manufactured with careful attention to:

• Raised Face (RF) surface finish

• Accurate pressure class and dimensional tolerances

• Clean and precise NPT threaded hole machining (where applicable)

• Full material traceability and inspection

All products underwent comprehensive quality checks prior to shipment to ensure compliance with international standards and customer requirements.

Trusted Flange Supplier for Middle East Projects

With extensive experience supplying super duplex RF flanges and spectacle blinds to the Middle East market, Haihao Group continues to support UAE customers with dependable products, technical expertise, and stable delivery performance.

From standard blind flanges to customized threaded and high-pressure flange solutions, Haihao Group remains a reliable partner for critical pipeline projects.