Introduction to swivel flanges: Haihao Group’s expertise in offshore engineering

Haihao Group has been actively participating in offshore engineering projects in recent years. This article introduces the swivel flange, a common component used in marine pipeline systems.

Swivel flanges consist of two primary components: a forged hub and a forged outer ring. The outer ring is designed to rotate 360 degrees around the hub, allowing for precise alignment of bolt holes during installation. This feature makes them ideal for offshore and subsea pipeline operations, where aligning bolt holes can be challenging.

swivel flange drawing

Haihao Group manufactures swivel flanges with pressure ratings ranging from Class 150 to Class 2500. The pressure, temperature ratings, and dimensions align with ASME B16.5 and MSS SP44 standards, ensuring compatibility with standard welding neck flanges.

It’s important to note that ASME B16.5, ASME B31.1, ASME B31.3, and MSS SP44 do not provide specific standards for the design and manufacture of swivel flanges. As a result, different manufacturers may use varying design guidelines, often referencing ASME or MSS standards. Therefore, it is crucial to select an experienced and reputable manufacturer when procuring swivel flanges.

Haihao Group, with over 40 years of flange manufacturing expertise, has participated in numerous offshore pipeline projects globally, including large-scale ship pipeline systems and subsea pipeline installations. We hold certifications from leading classification societies such as ABS, DNV, and BV. Our swivel flanges have been widely used in offshore pipeline projects worldwide, maintaining stable performance and receiving positive feedback from our clients. If you require high-quality swivel flanges, please feel free to contact us.