ASME B16.5 CLASS 600 A694F70 Forged swivel flange usage for Offshore and Subsea Operations

Swivel flange is a kind of special weld neck flange whose outer ring allows 360° rotational of the inner ring for rapid alignment of bolt holes with the standard flange. the feature makes it ideal for offshore/subsea pipeline operations, which allows divers to adjust bolt holes more quickly and conveniently.

The swivel ring flange is comparable to a set of stub end and lap joint flange,with the difference that an swivel ring flange is used for higher pressure and mostly in offshore/subsea applications.

The swivel flange can be designed for any nominal sizes and pressure rating for flange specification and gaskets (Class 150-Class 2500, OD 1/2- 60 inch), specified in ASME B16.5, API 6A and MSS SP44. some manufacturers also supply non-standard swivel flange to suitable for some special applications according to customer request, for example, the cladding welding on inner ring or PTFE coating treatment on the surface of the flange, 等.

料

Swivel flanges can be made from materials to suit any pipe network, the common material including:

Stainless steel:ASTM A182 F 304/304L/316/316L/321/347, Duplex F51/F53/F44/F55/F60/F61;

Carbon steel: ASTM A105; API 6A AISI 4130

Alloy steel: ASTM A694 F52, F60, F65, F70, ASTM A707 and are also supplied to customer specifications

Key Advantages of a Swivel Flange

Swivel flanges offer a range of benefits, including:

Quick Alignment

The 360° rotational feature eliminates the hassle of manually adjusting pipe connections, significantly reducing alignment time.

Ease of Installation

Even in constrained or complex spaces, swivel flanges streamline the installation process, enhancing efficiency.

Cost Savings

By minimizing installation time and effort, swivel flanges indirectly reduce labor costs and project timelines.

耐食性

Many swivel flanges are made from materials like stainless steel, super duplex, or copper-nickel, ensuring durability in harsh environments such as chemical plants or offshore installations.

Applications of Swivel Flanges

The unique characteristics of swivel flanges make them suitable for a variety of industries, such as:

Offshore and Subsea Operations

Ideal for challenging marine environments, especially in subsea installations.

Chemical Engineering

Reliable in handling corrosive substances and complex chemical processes.

Onshore Oil & Gas

Ensures secure connections in pipelines for oil and gas distribution.

Paper Mills

Suitable for systems requiring precision and durability in pulp and paper processing.

Fertilizer Plants

Designed for use in high-pressure systems within fertilizer manufacturing.

Environmental Engineering

Applied in water treatment, waste management, and pollution control systems.

Power Plants

Critical for piping systems in thermal, hydro, and nuclear power projects.

Mining Industry

Handles high-dynamic loads in mineral extraction and processing.

Shipbuilding and Shipyards

Essential for marine-grade piping in ship construction and repair.

Mechanical Manufacturing

Versatile in various industrial machinery and mechanical systems.

Food and Pharmaceutical Industries

Ensures hygienic and precise operations in food processing and medicine productio