Engineered Swivel Joints, Standard & Specialist Materials up to 72?

Engineered Swivel Joints, a range that are designed for a wide variety of conditions such as high loads, high pressures and high or low temperatures etc. Our Engineered Swivel Joints are also used for many applications.  Some of these include aggressive chemicals, abrasive materials, oxygen, nuclear, subsea, food, and beverages. The Engineered Swivel joints help to prevent early failure in hose and piping systems operating under extreme conditions. As a result, they are the ideal solution.

Sizes :

Dia 3/4? to 72? Nominal Bore.

Materials :

Carbon Steel, Low Temperature Steel, Stainless Steels, Duplex, Super Duplex, Monel, Hastelloy, Inconel and many other exotic materials on request.

Material Schedule :

Swivels Joint wall thickness in 40, 80, 160, XXS.

End connections :

Weld end, weld end extensions, flanged ANSI, RTJ, DIN, API, JIS, ISO, threaded, NPT, BSP, Tri-clover, hammer lug unions, Grayloc connectors, hubs and other fitting types available on request.

Assembled in styles :

Swivel Joints can be assembled with elbows and a variety of ends fittings and with one or more swivels for single or multiple planes of rotation. See Swivel Joint assemblies.

20, 30, 40, 50, 60, 70, 80, 10 alternative configurations on request.

Recently supplied engineered swivel joint applications include :

french fry waste, radioactive fluid transfer, phosphoric acid process, dark matter experiment DEAP3600, NACE MR0175 for sour gas duty, flare stack boom swivel joints.

Typical Swivel Joint types :

Heavy Duty Swivel Joint, PTFE Lined Swivel Joint, High-Pressure Swivel Joint, High-temperature Swivel Joint, Steam Jacket Swivel Joint, Food Duty Swivel Joint, Compact Swivel Joint. We can also offer many other swivel joint types on request.

What is a Swivel Joint?

A swivel joint is a precision-machined flexible piping component installed between pipes, hoses, or equipment. Their design allows one component of the system to move/rotate relative to the other. Industrial swivel joints are designed to work for an extensive temperature and pressure range. They have to ability to absorb external forces and generated stresses. Properly designed swivel joints have the ability to allow 360-degree rotation in 1, 2, or 3 planes.

Applications of Swivel Joints

Swivel joints are used in various industries including

• Chemical and petrochemical industry
• Power plants
• Metal and mining
• Water preparation and municipal technology
• Pharmaceutical industry
• Food and drink industry
• Refining industry
• Test stands
• Cooling water supply and water treatment plants
• Hydraulic systems and pneumatics
• Ink and paint industry
• Brewing and distillation industries
• Automotive industry
• Recycling industry
• Loading equipment
• Aviation and shipbuilding
• Paper and wood industry
• Cryogenic industry
• One of the common uses of swivel joints is in marine loading arms.

Working of a Swivel Joint

Swivel joints are usually made up of two main components; the sleeve and the body. They are locked in place by one or more ball-bearing races. These ball-bearing races keep the body and swivel sleeve properly aligned to allow the swivel to have a rotary motion around its axis. As the two parts of the swivel can rotate, the piping system components connected to the two ends of the swivel will also rotate freely and independently around the swivel’s axis. To have multiple axes of rotation, multiple swivels are installed with different orientations. This allows the system more freedom of movement between the sides of a fluid conveyance system. Different types of lubricants can be used to lubricate the bearing races.

The actual mechanical work is performed by the swivel’s ball bearings. However, the most important part of the swivel joint is the liquid-tight pressure seal that retains the pressurized working fluid. Pressure seals can be made from thermoplastics or elastomers like PRFE, FKM, Kalrez, fluoroelastomer, Chemraz, and nitrile rubber. The properties of these seal material options make them suitable for service with various fluids over a range of operating temperatures.

Types of Swivel Joints

Swivel joints can be categorized based on various parameters as mentioned below:

Depending on the end connection, there are three types of swivel joints

• Flanged swivel joint
• Threaded swivel joint, and
• Welded swivel joint.

Depending on the working component parts, swivel joints can be of three types:

• Compact O-ring swivel joints that use an O-ring for pressure seal.
• V-ring swivel joints that use a triple v-ring packing for sealing. They are robust in construction and suitable for severe applications.
• Split Flange swivel joints that use a separate bearing pack design with an H-ring and two O-rings.

Depending on the flow paths, there are basically three types of swivel joints:

• Straight through swivel joints having coaxial flow path.
• Right-angle swivel joints having outlet ports perpendicular to inlet ports.
• Offset swivel joints are a combination of both of the above designs

Depending on the axis of rotation, swivel joints are available in various styles which vary from manufacturer to manufacturer.

Selection of Swivel Joint

There are various parameters that must be considered for selecting a swivel joint for an application. Some of these factors are:

• Type of Fluid used
• Operating parameters of the fluid
• Space requirement
• Machining tolerances
• Insertion types like Seals, o-rings, wear rings, v-ring, bearings, etc
• Load requirements
• Environmental requirements
• Duty Cycle, torque requirement
• End connection requirement
• Material requirement, etc

Proper specification of swivel joint internal components is very important to reduce leaking possibilities. All parts must be designed based on recommended design guidelines.

Source: www.ewfm.co.uk

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