Spectacle Blind Flanges for Petrochemical and Offshore Projects: Haihao Group’s Reliable Supply
In offshore and petrochemical industries, pipeline systems are constantly exposed to high pressure, corrosive media, and extreme temperatures. To ensure safety and reliability, operators rely on spectacle blind flanges for isolating sections of piping during maintenance or inspection.
Haihao Group recently supplied a full range of Super Duplex stainless steel and Inconel spectacle blind flanges to a customer in Singapore. These components are engineered to perform in the most demanding service conditions, including subsea installations, chemical refineries, and high-pressure oil & gas pipelines.
Super Duplex stainless steel spectacle blind flange RTJ CL2500 supplied by Haihao Group
Why Super Duplex and Inconel Spectacle Blinds?
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Super Duplex Stainless Steel (UNS S32750):
Offers exceptional resistance to chloride-induced stress corrosion cracking, making it ideal for seawater systems, desalination plants, and offshore oil production facilities. With a PREN value above 40, it provides long-lasting corrosion resistance even in aggressive marine environments. -
Inconel Alloy 625 (UNS N06625):
Known for its outstanding performance in high-temperature, high-pressure, and sour service conditions, Inconel spectacle blinds are widely used in gas processing, chemical reactors, and offshore risers. Its excellent fatigue strength and oxidation resistance ensure safety in critical applications.
Together, these materials enable operators to minimize downtime, extend service life, and reduce maintenance costs in industries where failure is not an option.
Compliance and Testing
Every flange supplied by Haihao Group undergoes stringent quality checks:
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Designed and manufactured in compliance with ASME B16.48 and ISO 27509 standards
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NACE MR0175/MR0103 compliant for sour gas service
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Full material traceability with EN 10204-3.1 certification
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Mechanical, PMI, and corrosion testing to ensure reliability in offshore and petrochemical environments
Applications Across Key Industries
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Petrochemical Plants – For isolating pipeline sections during shutdowns or maintenance in refineries, chemical processing units, and storage terminals.
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Offshore Oil & Gas Platforms – Used in subsea pipelines, topside production systems, and FPSO vessels where resistance to seawater and sour gases is critical.
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Power Generation – Applied in cooling water systems and high-pressure steam pipelines.
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Marine Engineering – Installed in ballast water systems and seawater cooling circuits.
By supplying Super Duplex spectacle blind flanges and Inconel spectacle blind flanges, Haihao helps customers secure long-term operational reliability in these industries.
Haihao Group – Your Partner for Critical Piping Components
With decades of experience in flanges, fittings, and pipeline solutions, Haihao Group provides customers worldwide with products tailored to the most challenging applications. Our commitment to quality, compliance, and on-time delivery ensures that every shipment supports safe and efficient project execution.