Viega Megapress – safe and reliable pressing of thick-walled steel pipes
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Colour-coded marking
Viega Megapress and Megapress S are not suitable for drinking and fresh water applications. Each individual press connector is clearly identified by a marking (in this case: on the rear). For improved system identification, Megapress is marked with black dots and Megapress S with white dots on each press connection of the connectors.
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Use (Megapress S)
With dimensions of up to 2 inches, the Megapress S system provides an ideal way of connecting to local and district heat supply systems (in accordance with AGFW FW 524). Suitable for higher thermal loads of up to 140 °C, Megapress S XL is particularly suitable for use in industrial environments.
Megapress and Megapress S: quick, clean, safe and completely weld-free
Whether seamless or with seam heat sealing, industrially painted or epoxy-resin-coated, black or galvanised – thick-walled steel pipes are versatile, durable and robust. However, in the past, welding was often required to connect the pipes. With its press connectors from the Megapress systems, Viega is able to offer a safer, lighter and more economical alternative to welding. This means that even thick-walled steel pipes can be connected without any problems.
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Three reasons for using Megapress for heating installations
- Assembly time reduced by 60 % compared to welding, no fire hazard due to cold press connection technology
- Presses thick-walled steel pipes, regardless of whether the pipe is seamless, welded, black, galvanised or epoxy-resin-coated
- Comprehensive product range with many special components
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Three reasons for using Megapress S for installations
- Presses thick-walled steel pipes ranging from ⅜ of an inch to 4 inches and cuts assembly time by up to 80 % compared to welding, depending on the dimensions
- Suitable for higher thermal loads of up to 140 °C
- Zinc-nickel external coating as effective protection against corrosion
Megapress
Megapress S
Areas of application
The Megapress systems are suitable for a wide range of challenges
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Click here for an overview
Megapress in building services – simple connection of old and new
Thick-walled steel pipes are particularly common in old buildings and therefore in refurbishment projects as well. The robust pipes are often in good condition and can be reused. However, until now, the process of connecting a new boiler usually called for complex adapters or welding. The installation process was sometimes delayed by the residual water that had to drain out and, in old buildings, welding often resulted in an increased risk of fire. Megapress makes welding superfluous and enables secure and fast connection to existing pipes – even when different dimensions are involved. With the Megapress adapters and reducing sleeves, steel pipes with the special external diameters 38, 44.5 and 57 mm can also be connected without any problems. Despite the special boiler pipe dimensions, the connectors are still installed using the existing Megapress press rings. Consequently, there are no costs for additional tools.
Industrial and plant engineering
As part of its Megapress systems, Viega offers flow-optimised press connectors made of non-alloy 1.0308 steel. These have a zinc-nickel coating to protect them against external corrosion. e.g. as a result of condensation water in cooling systems. The press connectors are available in sizes from ⅜ of an inch to 4 inches and, with their stainless steel compression ring, ensure the load-bearing capacity of the connection. This makes them ideal for industrial and plant engineering contexts. Large dimensions tend to be used for cooling systems in industrial settings. Megapress S XL is ideal for this with its XL dimensions of 2½ to 4 inches, which completely eliminate the need for welding even in large cooling systems.
Local and district heat systems
Megapress S – whose dimensions range from ⅜ of an inch to 2 inches –can also be used to create press connections for thick-walled steel pipes in local and district heat systems with absolute ease. The press connectors can be used from the point of entry to the building for primary and secondary circuits with indirect connections, as well as for systems with direct connections. The FKM round sealing element used is suitable for temperatures up to 140 °C. Furthermore, Megapress S satisfies the stringent requirements of AGFW Worksheet FW 524.
Sprinkler and fire extinguishing systems
Sprinkler units need to be robust, stable and durable – especially in high-risk buildings, such as industrial and commercial facilities. Given that this requires the use of thick-walled steel pipe, the Megapress system is ideal for this purpose with dimensions ranging from ¾ of an inch to 2 inches. At the same time, it meets the toughest requirements and has FM and VdS certification. This not only certifies them as suitable for fire hazard classes that indicate low and medium fire risks (LH and OH 1-4), but also for those that signify a high fire risk, such as production and storage risks (HHP 1-4 and HHS 1-4). Consequently, Megapress is the perfect alternative to conventional groove/coupling systems or thread technology.
Compressed air systems and technical gases
Steel pipes are also frequently used in compressed air systems and piping networks for technical gases such as nitrogen. The cold press connection technology facilitates installation in the ceiling area of industrial buildings and enables convenient T-piece installation for extra fast, safe, and clean connection to appliances.
Special features of Megapress systems
Press connection technology for steel pipes of any size
Whether the project you are working on involves old or new buildings, Viega Megapress allows you to connect any pipes between ⅜ of an inch and 4 inches in just a few steps. However, the pipes concerned must conform to the requirements of DIN EN 10255 for threaded pipe quality or DIN EN 10220/10216-1 and DIN EN 10220/10217-1 for boiler pipe quality.
Connections that are ready to bear the full load straight away without any cooling time
After the pressing process, the connection between the press connector and the pipe can bear the full load and is ready for use immediately. Eliminate waiting or cooling times and the need for a fire watch.
Even XL steel pipes can be pressed – thanks to Pressgun Press Booster
Effortlessly press large steel pipes in sizes ranging from 2½ to 4 inches with our Pressgun Press Booster. Simply attach it to the Viega Pressgun and then press as usual. The specially developed hinged adapter jaw works in combination with the Megapress XL press rings to ensure maximum flexibility. The integrated carrying strap and the handle on the hinged adapter jaw also make the Pressgun Press Booster an ergonomic all-rounder for any application.
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High level of safety thanks to the Viega SC-Contur
The Viega SC-Contur feature is included on every press connector from the Megapress system, ensuring that any inadvertently unpressed connection points will visibly leak. It also allows the entire system to be monitored with a centralised leakage test. This eliminates the need for time-consuming visual checks while ensuring safety and at the same time reducing the amount of work required.
Recognisable at a glance: not suitable for drinking and fresh water
Viega Megapress is not suitable for the installation of drinking water pipelines. Each press connector has a clearly visible marking. This rules out the possibility of confusion or accidentally using Viega Megapress incorrectly. The only exception is the Megapress adapter made of silicon bronze (model 4213.2) for galvanised steel pipes.
Advantages of press connection technology at a glance
Time savings
Using the pressing technique to connect piping reduces installation time significantly. Much less effort is required compared to conventional methods such as welding or soldering and it can even be used in hard-to-reach areas. The system elements can be joined together in less than 20 seconds, reducing assembly time by up to 80 %.
Reliability
With our stringent quality standards, high-quality materials and continuous innovations, we ensure reliable press connections. The Viega SC-Contur feature makes any inadvertently unpressed connections clearly visible. It is included in all press connectors and enables a centralised leakage test to be performed.
Cost efficiency
The perfect symbiosis of quality and economic efficiency. Viega press connection technology is the effective way to save time and money. Not only does it eliminate the special steps associated with processes such as welding or soldering, but the pressing method also makes the system less prone to faults and therefore more durable than the alternatives.
Safety
No flames or fumes are generated when pressing pipe connections and the process is absolutely fireproof. This reduces the risks posed by flying sparks or human error – a major advantage, especially in sensitive or hard-to-reach environments. It also minimises the need for special health and safety measures and permits.
The Megapress assembly process – quick, clean and safe
Click here for the instructions for use Megapress and Megapress S
The Megapress product range
All Megapress sealing elements allow you to press seamless, welded, galvanised, industrially painted, epoxy-resin-coated and black steel pipes using the same connector. The Megapress profile sealing element encloses the pipe at three points simultaneously, ensuring that the connection is absolutely leakproof even when the surfaces are rough. The Megapress S connectors provide exactly the same sealing characteristics by virtue of their design and therefore do not require a profile.
Megapress profile sealing element up to 2 inches
Megapress S sealing element up to 2 inches
Megapress S XL sealing element from 2½ inches
| Megapress | Megapress S | Megapress S XL | |
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| Dimensions | ⅜ of an inch to 2 inches | ⅜ of an inch to 2 inches | 2 ½ inches to 4 inches |
| Sealing element | EPDM* profile sealing element | FKM** round sealing element | FKM** round sealing element with increased cross section |
| Maximum operating temperature | max. 105 °C | max. 140 °C | max. 140 °C |
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*EPDM = ethylene propylene diene rubber.
**FKM = fluorocarbon rubber.
You can find more detailed information about the Megapress and Megapress S product ranges here:
Certificates
The Megapress systems have been certified by the following institutions, among others; exact details can be found in the respective certifications:
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