View Details
For the selection of the most suitable PosiFlex expansion joint, the following basic criteria must be determined:
Size – joint nominal bore size, required face-to-face length and mating flange size/specification.
Pressure – operating, design, surge and test pressure of the system
Movement – axial, lateral, angular, and torsional (if applicable)
Medium – type of fluid, air, gas or powder
Temperature – minimum and maximum range
PED requirements – Group 1-2 liquid, Group 1-2 as, SEP, CAT 1. (EU applications only)
1. Size
2. Pressure
The pressure capabilities of a PosiFlex joint are limited by the reinforcement of the carcass at the arch area. Standard pressure ratings exist for each style of PosiFlex expansion joint. If requirements exceed these ratings, special constructions are available on request. Standard face-to-face dimensions of the joints are detailed on the technical datasheets, other non standard dimensions available on request.
3. Movement
4. Medium
5. Temperature
6. Pressure Equipment Directive (PED) Regulations 1999 With competitive price and timely delivery, HESPER sincerely hope to be your supplier and partner.
For the purposes of defining the product classification, expansion joints are considered as piping, not vessel, where the nominal size DN is more appropriate than the volume. Therefore for group 2 liquids for pressures above 0.5bar up to and including 10bar for all sizes, the classification is SEP (Sound Engineering Practices) and therefore cannot bear the CE mark.
Against this requirement PosiFlex products are designed and manufactured under ISO 9000 quality management systems to sound engineering practices. Additionally the products are marked for manufacturer identification and traceability and are accompanied by appropriate fitting instructions.
PosiFlex expansion joints are available in sizes from 25mm (1”) nominal bore up to of approximately 3600mm (144"). NB. Special, larger sizes available on application, with dimensions available on request.
When making any design calculations on PosiFlex expansion joints it is important to consider the maximum pressure of the system, not the operating pressure. This could be either surge or test pressure. Remember that pressure may be positive or negative (vacuum).
PosiFlex expansion joints are designed to accommodate axial (compression and elongation), lateral, angular and torsion movements. All movement capabilities are dependent upon the size and number of arches. For increased movement capability, more arches can be added (up to a maximum of four for most sizes).
The medium conveyed through the PosiFlex expansion joint can be fluid, gaseous or powder. The tube material of the joint must be compatible with the medium it is carrying. Abrasive materials may require a thicker and/or softer tube to improve service life. Note that in some cases the surrounding environment must be considered. The outer cover may be exposed to oils, chemicals, acid fumes or sunlight. Refer to chemical resistance tables to select the correct tube and cover elastomers. Remember that temperature considerations must be taken into account when selecting elastomers.
Temperature ratings of expansion joints are governed by the materials of construction. Please contact PosiFlex for details.
The PosiFlex expansion joint is interpreted as being defined as a pressure accessory within the Pressure Equipment Regulations 1999.
While expansion joints may not get the attention they deserve, they play a vital role in various systems and manufacturing processes. Whether you’re in the pharmaceutical industry, offshore oil and gas industry, agriculture, food and beverage or transportation, choosing high-quality expansion joints is essential.
Pacific Hoseflex supplies a range of premium expansion joints and understands the importance of finding products that meet your specific needs. Here’s a five-step guide to finding the perfect expansion joints for your application.
The most important step in selecting high-quality expansion joints is having a deep understanding of your specific application. It’s essential to consider what type of fluid or material will be passing through, the temperature variations, the level of pressure and the expected range of movement. By determining the exact demands of your application, you can provide Pacific Hoseflex with the information to ensure you receive the most suitable expansion joints.
Expansion joints are available in a range of materials, including rubber, metal, PTFE, fabric and seismic. Each material has its strengths and weaknesses, for instance, rubber joints are ideal for absorbing vibrations, while metal joints are durable and can handle high temperatures. We have a variety of expansion joints including:
For our full range of expansion joints, click here!
Pacific Hoseflex offers a range of expansion joints that vary in design and configuration. What design and configuration you need will depend on how much flexibility and range of movement is required. For instance, the VITALFLEX® seismic joints and expansion loops are engineered to account for the cumulative movement(s) in piping systems. You should also consider the type of end connections, such as flanges or threaded ends to match your requirements.
Once you know what type of expansion joint you require, it’s time to check its quality; not all expansion joints are created equal. Our high-quality expansion joints comply with all industry standards and certifications. Pacific Hoseflex has meticulous QA practices to ensure the joints are designed to withstand the conditions of the intended application.
The final piece of the process of choosing expansion joints is finding a reputable supplier. Look for an Australian hose and fittings manufacturer who has a strong track record in producing quality expansion joints and can also provide expert guidance, customisation and products built to last.
Pacific Hoseflex offers all of this and more. We are a trusted hose supplier with a range of fittings to suit every application. Our expansion joints are high-quality and durable and we are committed to customer satisfaction.
Our Asset (Hose) Management System offers clients complete traceability, encompassing crucial data regarding test and production dates, expiration dates, recall schedules, planned maintenance, and the present location. Our system is flexible and can be customised to accommodate your specific needs.
Selecting quality expansion joints is crucial if you want to ensure the longevity and performance of your systems and applications. By following this 5-step guide, you’ll be well-prepared to make informed decisions when it comes to choosing the right expansion joints for your application.
Contact our experienced team to learn more about our range of high-quality expansion joints.
If you are looking for more details, kindly visit expansion joint manufacturer.