We design and manufacture metal, non-metal expansion joints and dampers and stacks, using the highest quality materials, equipment and techniques, while assembly is delivered with assured consistency and certification.
Our solutions are designed for customers to meet the high performance and safety requirements of refineries, petrochemical, oil and gas, LNG, PTA, Polypropylene, and other Industrial Plants.
Our main areas of expertise include:
- Metal Expansion Bellows
- Fabric Expansion Joints
- Rubber Expansion Joints
- Teflon Expansion Joints
- Dampers and Silencers
- Strainers
- Tower Internals
Please explore our product pages for more detailed information:
Product Groups
OUR PRODUCTS
METAL EXPANSION JOINTS
Restrained or unrestrained for all thermal and pressure piping specifications backed by FEA and Stress Analysis.
NON-METAL EXPANSION JOINTS
Highly flexible light-weight and affordable expansion joints for thermal, corrosion, shock and vibration.
DAMPERS AND STACKS
Isolation, modulation or diversion system solutions for your project specification and software optimised steel stack solutions.
- Durable construction materials
- Load reduction
- Controls vibration
- Absorbs high pressure
- Multi-axis movements
- Absorbs pressure thrust force
- Highly flexibile for concurrent movements
- Minimum overall face-to-face length
- Isolates vibration
- Lower cost to ship, install, and replace
- Corrosion resistant
- Minimal spring forces
- High strength
- Cost effective
- Multiple damper design types
- Consistent manufacturing quality
- Robust steel stack designs
- FEA and Stress Analysis
FCCU & RFCC EXPANSION JOINTS
We design and manufacture FCCU & RFCC expansion joints (Reactor & Regenerator , Flue Gas, Turbo-Expander) in both constructions Cold Walled (Refractory Lined) & Hot Walled (Floating Hardware) complying with the requirements of various licensors.
Expansion Joints are vulnerable accessories of a complete system. In this application the design requirements of the expansion joints are usually influenced by its high temperature, pressure and its thermal movement, in combination with aggressive flowing medium.
These high quality superior performance products meet the various needs of Refineries, Styrene, LNG, Desalination, Polypropylene, PTA, Mining Plants, Power Plants (Gas, Steam, Coal, Solar and Geothermal), Cement Plant, Steel Plants including Tuyere Bellows & Stave Seals for Blast Furnaces, Food & Beverage industry, and many more sectors.
Please find further insights in our Frequently Asked Questions section below. If you have more complex questions or product enquiries please get in touch via our contact form, we would be happy to discuss your enquiry.


CLAM SHELL BELLOWS
Clam Shell bellows are supplied in two halves and welded at the site. These are especially useful for continuously operating plants such as refineries or petrochemical facilities. Clam Shell wraps around cracked bellows and is welded on site. We can design suitable bellows through a site survey, and provide supervision of installation. Our site team of skilled welders are experienced with working in confined spaces and high temperatures due to radiant heat.
WEDGE WIRE SCREEN, STRAINERS & FILTERS
Wedge Wire is a welded steel structure, mainly used for filtration, separation, and retention media. It consists of profile wires, usually V-shaped, which are resistance welded onto support rods. The distance between the profile wires is controlled very accurately, as it forms the slot through which the filtrate flows.


TOWER INTERNALS
We can supply spares of OEM Tower Internals. High-performance and high-quality tower internals like scallops, support grids, outlet collector, centre pipe, inner screens, and more components for industrial use.
Our Products
FAQS
Similar to the hydraulic force in a pipe - which is a product of internal pressure and the mean area of the line - the pressure thrust force is an equal force when you install an expansion joint in a pipe. It is a product of the internal pressure and mean area of the expansion joint. For an expansion joint to work correctly the line should be anchored and guided accurately. For an axial joint to operate, install the first guide at 4D on either side. The second guide at 14D on either side, subsequent guides are provided on the technical catalog.
You can absorb thermal expansion axially, laterally or angularly, or a combination of these types. We commonly use lateral and angular joints where the hardware of the expansion joint absorbs the pressure thrust force.
Expansion joint codes can be designed for piping expansion joints, EJMA 10 latest Addendum, ASME 31.1 and 31.3, and for Heat Exchangers ASME Section VIII Div. 1.
The metallurgy options are: Nickel Alloys - Inconel 600/601/625/718, and Incoloy 800/800H/800HT/825. Hastelloy C22/C276 and Alloy 400. Stainless Steel - Austenitic A304/304L/304H, 316/316L/316Ti, 317L, 321/321H, 347/347H and Super Austenitic 904L. Heat Resistant - SS 310/310S, 253MA. Duplex - SS 2205 and Super Duplex 2507.
A sleeve is required in an expansion joint to prevent resonance in the convolutions causing fatigue, due to flow at the high velocity of the medium.
3 to 4 weeks standard delivery for catalog items and 6 weeks for non-standard joints. 1-2 days for refinery expansion joints ex-works. Repl Australia is always aims to be able to work within your project time frames.
The expansion joint is the weakest link in the piping system, hence it should be used as a last resort. A piping engineer must always employ natural pipe flexibility to solve thermal expansion problems or use pipe loops.
Braided hose is made up of a convoluted tube with standard thicknesses, braided on the outside. They are suitable to absorb lateral movement for smaller diameters. A hose cannot absorb axial movement, but can be used as a loop to take up the thermal expansion of pipe. It has limitations to pressure and temperature due to standard material and thickness.
A single joint has one set of convolutions between the flanges or weld ends. A universal joint has two or more sets of convolutions with a centre spool in the middle.
Yes, expansion joints can absorb movement in all three planes using a combination of different configurations. Repl Australia can assist in the design configurations of diferent expansion joint requirements.
A tied expansion joint is equivalent to a dismantling joint.
Inline pressure balanced expansion joints are used only to take up expansion in one plane without transferring force to the pipework. A pressure-balanced expansion joint absorbs movements in two planes using an elbow.
The pressure of the medium is applied externally to the convolution instead of internally. External pressure joints are used on long LNG lines, long underground pipes, or long pneumatic railway signalling lines
Expansion joints are suitable to be used under a vacuum. The convolution profile is similar both from the inside and the outside. Hence, if the joint design is for 1bar internal pressure, it is also suitable for 1bar external or full vacuum.
The application determines the selection. Bellows convolution uses different metallurgies and thicknesses and profiles to withstand higher pressures. A Rubber joint has a limitation of temperature however ideal for resilience to vibration. Fabric joints are similar to metal expansion joints but are limited to 35Kpa pressure. Like Rubber, the PTFE expansion joint limitation is temperature. PTFE joint applications are for very corrosive mediums, and when vibration is present. For aggressive caustic applications at high pressure, a PTFE lined metal expansion joint is ideal. Repl Australia can provide advice on the best method to determine product selection.
A non-metal fabric joint is preferred when pressure is less than 35Kpa and space is restricted or if the shape is rectangular.
Repl Australia prefers a SS braided hose to a metal expansion joint when the diameter is small and vibration present. For example, on pump suction and discharge.
It is economical to use expansion joints above 300nb rather than pipe loops. They are also a preferred solution when space is too restricted to install pipe loops.
We manufacture Teflon-lined or PTFE metal joints using a unique process. The metal housing helps withstand higher pressures, and all wet parts are exposed only to PTFE.
A heat exchanger metal joint is mainly used on fixed tube type heat exchangers to take up the differential expansion between the tube bundle and the shell. The convolution geometry can be an omega profile for very high pressure, a U shape profile for medium pressure, and a reinforced U shape profile for moderately high pressure. The design code used is ASME VIII Section 1 and EJMA for the Omega profile.
In a hot wall design, the end connection and hardware are subject to full design temperatures. In contrast, the joint is refractory lined or insulated in cold wall expansion joints. Floating hardware applies to hot wall expasion joint design; the hardware is not welded directly on weld ends. Instead, it is attached using supports that allow radial growth of the hot weld ends.