Haihao Group Supplies Socket Weld Flanges to a Singapore Marine Project

Haihao Group has successfully delivered a batch of socket weld RF flanges to a valued customer in Singapore. These products were engineered for demanding marine service environments and manufactured in full compliance with ASTM A182 Grade F310H and ASME B16.5 dimensional standards. Each flange was supplied with a complete set of DNV-approved EN10204 3.1 certificates, ensuring full traceability and high reliability for offshore and shipbuilding applications.

Product Details

Socket Weld RF Flanges

• Size: 1″

• Wall Thickness: SCH 40S

• Pressure Rating: 300 lbs

• Material: ASTM A182 Gr. F310H

• Standard: ASME B16.5

• With End Cap & 3.1 Marine Approved Mill Certificate

The high-temperature alloy F310H stainless steel provides excellent oxidation resistance and structural stability, making these 300-lb socket weld flanges suitable for elevated-temperature piping systems commonly found in marine, petrochemical and offshore installations.

Comprehensive Certification & Testing

To meet the customer’s strict marine-grade requirements, Haihao Group provided a robust and complete documentation package, including:

• EN10204 3.1 Mill Certificate (DNV Marine Certified)

• Compliance with NACE MR0175 / ISO 15156

• Heat treatment records (including cooling medium)

• Ultrasonic Testing (UT) report

• Hardness test report

• Dimensional inspection report

• Raw Material (RM) chemical & mechanical test certificates

This certification package ensures that every F310H socket weld flange meets international standards for corrosion resistance, mechanical integrity and metallurgical stability.

Reliable Supply for Singapore’s Marine & Offshore Sector

Singapore’s shipbuilding, marine engineering and offshore industries demand products that combine durability, traceability and precise craftsmanship. Haihao Group continues to support these sectors with:

• Advanced forging and machining capability

• Complete material traceability

• Fast delivery for both standard and customized flanges

• Full compliance with international standards and marine classification requirements

Our long-term clients rely on Haihao Group’s ability to deliver high-temperature socket weld flanges for marine applications with consistent quality and responsive technical support.