MSS SP-97 A182 GR F51 RF flange-olets were delivered to the customer in Singapore

As a benchmark enterprise in the global industrial pipeline system integration service sector, Haihao Group has recently received high praise from its strategic partner in Singapore for the delivered  flange-olets(flange outlets). This batch of products, crafted from ASTM A182 GR F51 duplex stainless steel and manufactured in strict accordance with MSS SP-97 standards for pipeline branch connections, boasts the following key technical specifications:

▶ Product Specifications: 2″×6″ reducing outlet design, enabling efficient transition between main and branch pipelines.
▶ Pressure Rating: Conforming to ASME B16.5 Class 150# standard pressure system.
▶ Wall Thickness Configuration: SCH40S pipe schedule, meeting petrochemical-grade pressure requirements.
▶ Sealing Structure: RF (Raised Face) flange sealing, ensuring zero-leakage performance of the system.

Quality Assurance System:

Material Process:

Implemented a duplex heat treatment process of solution annealing + aging, achieving a PREN (Pitting Resistance Equivalent Number) value ≥ 35, combining the advantages of both austenitic and ferritic microstructures.

Inspection Dimensions:

Metallographic Analysis: Verified the homogeneity of the duplex microstructure.

Hardness Testing: Met the mechanical property requirement of HB ≤ 285.

Corrosion Resistance Verification: Passed the ASTM G48 Method A pitting corrosion test.

Non-Destructive Testing: 100% penetrant testing (PT) and ultrasonic testing (UT).

Low-Temperature Toughness: Charpy V-notch impact test at -46°C, with impact energy absorption ≥ 35J (per ASTM A370 standard).

The Group’s quality control center establishes traceable archives for each product, accompanied by bilingual (Chinese-English) inspection reports and European CE certification documents. This delivery fully demonstrates Haihao Group’s vertical integration capabilities in specialty pipe fittings, constructing a four-dimensional quality assurance system encompassing “chemical composition – microstructure – mechanical properties – service performance,” and continuing to provide reliable pipeline connection solutions for global energy infrastructure projects. Email:sales@haihaogroup.com