Shipment of Super Duplex F55 WN Compact Flanges with IX Seal Ring to Singapore | Haihao Group
Haihao Group has completed another shipment of super duplex stainless steel WN compact flanges with IX seal ring for a long-term customer in Singapore. The supplied sizes include 10″ 1″ THK, 2500# and 12″ 1.25″ THK, 2500#, both manufactured from ASTM A182 Grade F55 (Super Duplex). These flanges are designed for critical applications requiring exceptional corrosion resistance, mechanical strength, and compliance with stringent offshore and energy-sector standards.
The products were manufactured and tested strictly according to BS EN ISO 27509 and NACE MR0175, ensuring full suitability for sour service environments.
Super duplex F55 WN compact flange with IX seal ring, 2500#, manufactured by Haihao Group for Singapore shipment
Order Details
| Product | Size | Material | Standard |
|---|---|---|---|
| WN Compact Flange with IX Seal Ring | 10″ 1″ THK 2500# | ASTM A182 GR. F55 | BS EN ISO 27509, NACE MR0175 |
| WN Compact Flange with IX Seal Ring | 12″ 1.25″ THK 2500# | ASTM A182 GR. F55 | BS EN ISO 27509, NACE MR0175 |
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Super duplex F55 WN compact flange with IX seal ring, 2500#, manufactured by Haihao Group for Singapore shipment
Compliance with NACE and Strict Material Requirements
The supplied F55 super duplex compact flanges meet full NACE MR0175 requirements, ensuring reliable performance in sour service and chloride-rich conditions.
Key material characteristics include:
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Ferrite content 35–55% (verified by metallographic analysis)
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Heat-treated according to ASTM A182
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Verified impact performance down to −46°C, suitable for low-temperature service
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High resistance to pitting, crevice corrosion, and stress corrosion cracking
These properties make F55 compact flanges ideal for offshore platforms, subsea pipelines, well-head systems, and high-pressure chemical process lines.
Comprehensive Inspection & Test Documentation
Haihao Group delivered a full set of test and inspection documents to ensure traceability and compliance, including:
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Chemical composition report
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Tensile test report
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Hardness test report
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PMI (Positive Material Identification) report
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Charpy impact test report (−46°C)
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Metallographic structure report
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Pitting corrosion test report (ASTM G48A)
Each flange underwent strict dimensional checks and surface evaluation according to BS EN ISO 27509 and customer specifications.
Why Choose Haihao Group for Compact Flanges?
Haihao Group has long served the global offshore, petrochemical, and subsea industries with high-precision compact flanges, super duplex fittings, and critical-service pipeline components. Our capabilities include precision machining, advanced heat-treatment control, ferrite content management, and third-party inspection support.
Whether for high-pressure subsea systems or corrosive chemical facilities, Haihao Group provides dependable materials backed by international certifications.