Stainless Steel Long Weld Neck Flanges

Stainless Steel Long Weld Neck Flanges are essential for industries that require reliable, high-strength, and corrosion-resistant connections. Available in a wide range of materials, grades, and sizes, these flanges provide a safe and efficient solution for high-pressure and high-temperature applications.

Stainless Steel Long Weld Neck (LWN) Flanges are a critical component in high-pressure piping systems. Designed with an extended hub, these flanges provide reinforcement and distribute stress evenly across the joint, making them ideal for critical applications where strength, durability, and leak-proof connections are paramount.

They are commonly used in process piping, offshore platforms, power plants, petrochemical units, and other heavy-duty industries. Manufactured as per ANSI, ASME, DIN, EN, BS, and JIS standards, SS Long Weld Neck Flanges are available in a wide range of materials, grades, pressure classes, and dimensions.

Applications of SS Long Weld Neck Flanges

• Stainless Steel Long Weld Neck Flanges are used in various industries, including:
• Petrochemical & Refinery Plants – For handling corrosive fluids and high-pressure lines.
• Power Generation – Suitable for boilers, heat exchangers, and turbine piping.
• Marine & Offshore – Resistance to seawater and harsh offshore environments.
• Oil & Gas Industry – Ideal for high-pressure pipeline connections.
• Chemical Processing Units – Handles highly reactive chemicals with safety and durability.
• Pharmaceutical & Food Industries – Preferred for sanitary and hygienic piping systems.

Advantages of Long Weld Neck Flanges

• High structural integrity and strength.
• Reduced turbulence and erosion in pipelines.
• Even stress distribution minimizes risk of flange failure.
• Suitable for extreme pressure and temperature variations.
• Excellent corrosion resistance with stainless steel grades.
• Long service life with minimal maintenance.

Available Materials and Grades

Stainless Steel Long Weld Neck Flanges are available in a wide range of materials and grades to meet different industry requirements:

• Austenitic Stainless Steel Grades: SS 304, 304L, 304H, 316, 316L, 316Ti, 321, 321H, 347, 347H
• Duplex & Super Duplex Stainless Steel: UNS S31803, S32205, S32750, S32760
• Precipitation Hardening Stainless Steel: 17-4 PH

These grades offer superior resistance to corrosion, oxidation, and high-stress environments, making them suitable for critical applications.

Standards & Pressure Ratings

SS Long Weld Neck Flanges are manufactured as per international standards, including:

• ASME/ANSI B16.5 – For sizes up to 24 inches.
• ASME B16.47 Series A & B – For large diameter flanges.
• DIN, EN, BS, JIS – For European and Asian standards.

Pressure classes typically range from 150# to 2500#, covering a wide variety of operating conditions.

Types of Stainless Steel Long Weld Neck Flanges

• Standard Long Weld Neck Flanges – For general piping systems.
• Heavy-Duty Long Weld Neck Flanges – For high-pressure and high-temperature service.
• Custom Long Weld Neck Flanges – Designed for special applications with unique dimensions.