Expansion joints and hoses
Expansion joints and hoses
HKS is a prominent European manufacturer specializing in expansion joints and hoses, offering a diverse range of products from standard to custom-designed solutions. Their products are utilized globally across various industries such as mechanical engineering, shipbuilding, and the chemical industry. HKS prioritizes quality, performance, and timely delivery, supported by extensive stockholding and certifications like EN ISO 9001 and ISO 3834-2.
- Corrugated Expansion Joints: Made from stainless steel, designed for high expansion absorption and low spring rates.
- Lens Expansion Joints: Available in round and rectangular shapes, made from malleable and weldable steels.
- Rubber Expansion Joints: Made from rubber and PTFE, known for flexibility and media resistance.
- Fabric Expansion Joints: Designed for high flexibility, suitable for large movements.
- Special Expansion Joints and Plant Engineering: Custom solutions for specific industrial needs.
- Hoses: Includes metal and rubber hoses for various applications.
- Metal Bellows: Core component of expansion joints, designed for flexibility and pressure resistance.
- Connection Types: Includes swivel flanges, fixed flanges, welding ends, and welding neck flanges standardized to EN 1092-1.
- Tie Rods: Used in lateral and angular expansion joints to absorb axial reaction forces.
- Absorption of temperature-related length changes in pipe systems.
- Reduction of forces and moments in connections.
- Compensation of relative movement between system parts.
- Damping of vibrations and structure-borne sound.
- Compensation of installation inaccuracies.
HKS maintains a strong focus on quality management, with certifications such as TÜV HP0 and PED category III module H. Their products are approved by various classification bodies, ensuring high standards of safety and performance.
Expansion joints are installed to compensate for thermal expansions in piping systems. The design considers axial, lateral, and angular movements, with fixed bearings absorbing additional forces. The document provides formulas for calculating thermal expansion and forces.
The document explains the derating method for adjusting table values based on operating conditions, such as temperature and stress cycles.
An example is provided for selecting an expansion joint for a piping system, detailing the calculation of thermal expansion, reaction forces, and the selection of suitable components based on operating conditions.
The document concludes with a guide to HKS type designations for corrugated expansion joints, explaining the coding system for movement alignment, connection parts, and special models.
Special versions of expansion joints are available upon request, with options for different nominal diameters, pressure stages, lengths, and additional features like inner sleeves, protective sleeves, and special coatings.
The document outlines the permitted operating temperatures for various material combinations, including standard, stainless steel, heat-resistant steel, and nickel-base alloys.
For simultaneous movement absorption, Δx and Δy values should be reduced proportionately. The sum of all parts must not exceed 100%. Special coatings and connection variants are available on customer request.
Manufactured from high-quality materials, HKS rubber expansion joints are suitable for absorbing high levels of deformation and vibrations. They are used in various industries, including food processing, chemical industries, plant engineering, mechanical engineering, engine and shipbuilding, process engineering, pipeline construction, and technical building systems.
Fabric expansion joints are made from high-quality materials, designed to handle gaseous media and abrasive substances, with multi-layered structures for temperature reduction, sealing, and weather protection.
HKS offers a variety of hoses, including stainless steel, fuel, hydraulic, and elastomer hoses, with different connection parts like flanges, welding ends, and couplings.
Manufacturing is in line with Pressure Equipment Directive 97/23/EC module H and quality management in line with EN ISO 9001. Approvals from notified bodies include ABS, BV, DNV, DVGW, GL, LRS, RINA, Roznador, TÜV, and ASME Code Sec. VIII Div.1 with U designator.
Catalog excerpts
MANUFACTURER OF EXPANSION JOINTS AND HOSES Flexible solutions for your pipe system Corrugated expansion joints | Lens expansion joints | Rubber expansion joints | Fabric expansion joints | Special expansion joints and plant engineering | Hoses
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HKS | Manufacturer of expansion joints and hoses CORRUGATED EXPANSION JOINTS 12 Technical information 13 Model variants 14 Metal bellows 16 Connection Types 18 Tie rods 20 Inner sleeves and protective pipes 22 Installation in pipe system 28 Type designation 30 Type AN B-B with swivel flanges 36 Type AN B-B for low pressure 40 Type AN F-F with fixed flanges 46 Type AN V-V with welding neck flanges 54 Type AN R-R with welding ends 62 Type AN R-R for low pressure 66 Type AM B-B with swivel flanges 70 Type AM B-B for low pressure 74 Type AM R-R with welding ends 78 Type AM R-R for low pressure 82...
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Manufacturer of expansion joints and hoses | HKS Type RN F-F with fixed flanges Type RN R-R with welding ends Type RM B-B with swivel flanges Type RM F-F with fixed flanges Type RM R-R with welding ends Type LM F-F with fixed flanges Type LM R-R with welding ends Angular expansion joint Type WN F-F with fixed flanges Type WN R-R with welding ends Type KN F-F with fixed flanges Type KN R-R with welding ends LENS EXPANSION JOINTS 150 Technical information Model variants Round lens expansion joints Rectangular lens expansion joints Connection Types Inner sleeves Installation in pipe system Type...
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HKS | Manufacturer of expansion joints and hoses SPECIAL EXPANSION JOINTS AND PLANT ENGINEERING 186 Technical information Pipe components Special expansion joints RUBBER EXPANSION JOINTS 190 Technical information Model variants Rubber bellows Connection Types Vacuum support rings PTFE lining Inner sleeves External protection systems Rubber expansion joint Type 1
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Manufacturer of expansion joints and hoses | HKS Rubber expansion joint Type 2 216 Model CR Rubber expansion joint Type 3 FABRIC EXPANSION JOINTS 232 Technical information Model variants Connection Types Accessories Fabric expansion joint
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HKS | Manufacturer of expansion joints and hoses Technical information Application options Documentation Interlocked metal hose Type B normal corrugation Type C tightly corrugated / highly flexible Hose connection Types Screw fittings Pipe and threaded nipple
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Manufacturer of expansion joints and hoses | HKS Basic units Conversion tables Coefficients of thermal expansion Steam table Flange dimensions ASME B16.5 lap joint flanges ASME B16.5 welding neck flanges Mechanical properties Corrugated expansion joints Lens expansion joints Rubber expansion joints Fabric expansion joints
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HKS | Manufacturer of expansion joints and hoses
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Flexible solutions for your pipe system! HKS is one of Europe’s leading manufacturers of expansion joints and hoses. The product range of the group of companies covers a wide range from simple standard expansion joints to individually tailored special expansion joints. HKS expansion joints and hoses are used in over 50 countries worldwide. HKS is excellently positioned in the tension triangle of quality – performance – delivery date: Meeting the highest quality standards goes hand in hand with at- tractive, competitive prices as well as short-term delivery dates made possible by extensive stockholding....
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HKS | Manufacturer of expansion joints and hoses Stable business relations through quality Quality management has been at the centre of all operations since foundation of the company in 1981. It is the basis for a high level of customer satisfaction, for safety and for environmental protection. All organisational units of HKS have been certified in line with EN ISO 9001. Our two production sites are accredited welding fabricators according to ISO 3834-2. Regular customer audits repeatedly confirm the success of our quality management. Approvals > Current welding certification (TOV HP0) > Certification...
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Manufacturer of expansion joints and hoses | HKS
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HKS | Corrugated expansion joints Corrugated expansion joints HKS designs and manufactures corrugated expansion joints from the simplest standard expansion joints to highly complex expansion joints which are designed especially on the basis of individual customer requirements. Corrugated expansion joints are single or multi-layered stainless steel expansion joints with a high level of expansion absorption and a low spring rate. They are used as flexible pipe connections in mechanical engineering, power unit and pipeline construction, in district heating and exhaust pipes as well as in industrial...
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Corrugated expansion joints | HKS Model variants Axial expansion joint (example Type AN B-B) › With swivel flanges, fixed flanges or welding ends › Nominal diameters DN 20 – DN 2800 1) › Pressure stages DN 1 – DN 40 2) › Low adjustment force rates and high movement absorption Lateral expansion joint (e.g. Type RN B-B) › With swivel flanges, fixed flanges or welding ends › Nominal diameters DN 20 – DN 2800 1) › Pressure stages DN 1 – DN 40 2) › With tie rod systems (tension rods or joints) › With single joint movable on one side › With tension rod or cardan joint moveable in all directions › Tie...
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HKS | Corrugated expansion joints The bellows of an expansion joint The metal bellows as a fl exible basic elements has a high level of flexibility due to its continuous convolution. A high level of pressure resistance also has to be ensured. The bellows can be single or multi-layered. Wall thickness, number of layers, convolution geometry and number of convolutions are the adjustment parameters for designing an expansion joint (movement absorption, spring stiffness, convolution stability and column instability). The multiple walls divide the pressure load on the overall wall into several individual...
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Corrugated expansion joints | HKS A temperature of 20 °C, the nominal pressure, the movement absorption and service life of 1000 stress cycles are normally used as a standardised basis for calculating the metal bellows of an expansion joint. A stress cycle is a complete, repeating oscillation of the bellows (zero position - max. positive deflection - zero position - max. negative deflection - zero position). Corrosion, high frequency vibrations, resonances, strong temperature changes and pressure surges are additional influencing factors. good resistance against aggressive media, high ductility,...
Open the catalog to page 15All HKS GmbH catalogs and technical brochures
HKS Product Range40 Pages
- Water hose
- Chemical product hose
- Steel hose
- Hydraulic hose
- Pneumatic flexible piping
- Fuel hose
- Pipe expansion joint
- Round pipe expansion joint
- Stainless steel hose
- Metal pipe expansion joint
- Steam hose
- Fire hose
- Hot water hose
- Steel pipe expansion joint
- Acid hose
- Fuel oil hose
- Seawater hose
- Rectangular pipe expansion joint
- Fabric pipe expansion joint