MSS SP-97 Sockolet Nickel Alloy ASTM B366 UNS N06625: Precision-Engineered for Corrosive High-Pressure Applications

As oil & gas operations increasingly push into deeper, hotter, and more corrosive environments, the demand for corrosion-resistant and high-performance fittings continues to rise. One such solution is the MSS SP-97 Sockolet Nickel Alloy ASTM B366 UNS N06625, which Haihao Group recently manufactured for a Singapore-based client. Designed for 3000# pressure systems, this 1″ × 8″ Sockolet delivers exceptional performance in offshore and sour gas environments.

What is a sockolet?

A sockolet is a type of branch connection fitting used to create a 90-degree outlet from a larger run pipe. It is commonly used in high-pressure piping systems, especially where space is constrained or welding must be kept minimal. The socket-weld design offers a strong, leak-free connection ideal for high-stress environments.

Key Features of the 1″ × 8″ 3000# Nickel Alloy Sockolet

Standard Compliance:

MSS SP-97: Industry standard for reinforced branch connections

ASME B16.11: Dimensional standards for forged fittings

NACE MR-01-75 / ISO 15156: Certified for use in sour service environments containing hydrogen sulfide (H₂S)

Material Grade:

Nickel Alloy ASTM B366 UNS N06625 (Inconel 625)

Renowned for high strength, excellent weldability, and superior corrosion resistance in both oxidizing and reducing environments

Pressure Rating:

3000 PSI (3000#) — suitable for high-pressure pipelines in the oil, gas, petrochemical, and marine industries

Why Choose UNS N06625 for High-Stress Applications?

UNS N06625, also known as Inconel 625, is a nickel-chromium-molybdenum-niobium alloy offering outstanding resistance to:

• Pitting and crevice corrosion
• Chloride-induced stress corrosion cracking
• Oxidation and carburization at high temperatures
• Hydrogen sulfide (H₂S), a critical threat in sour gas applications

Its high nickel content (>58%) combined with molybdenum and niobium provides structural stability under thermal cycling, pressure surges, and chemical attack, making it ideal for offshore, subsea, and refinery environments.

Haihao Group’s Manufacturing Expertise

Haihao Group is a global supplier of industrial pipe fittings, flanges, and branch connections. For this Singapore client, we delivered custom 1″ x 8″ 3000# MSS SP-97 sockolet fittings with full material traceability and third-party testing:

• Material Test Certificate (MTC)
• Dimensional & pressure inspection reports
• NACE compliance verification

Each piece undergoes strict non-destructive testing (NDT) and heat treatment control to ensure it meets both client and international standards.

Applications of Nickel Alloy Sockolet Fittings

• Offshore oil platforms
• Subsea flowline systems
• Refinery sour gas processing units
• High-temperature steam lines
• Chemical injection skids

Wherever reliability, corrosion resistance, and long-term performance matter, nickel alloy Sockolets deliver measurable benefits in reducing maintenance downtime and improving system integrity.

The MSS SP-97 Sockolet Nickel Alloy ASTM B366 UNS N06625 represents the intersection of advanced metallurgy and precision engineering. With proven resistance to extreme environments and compliance with global standards, it’s a fitting solution for any high-pressure, corrosive media application.

Looking for a reliable Sockolet manufacturer for high-alloy pipe fittings? Contact Haihao Group today for technical support, custom solutions, and global delivery. Email:sales@haihaogroup.com