Stainless steel press-fit has gained significant popularity in various industries due to its efficient and reliable joining method.
It offers numerous advantages over traditional welding techniques and existing piping systems. This makes it an attractive option for an extensive range of applications, including hot and cold water systems, compressed air systems, oil lines, and more.
However, when it comes to gas-related applications, how does stainless steel press-fit perform? In this blog, we cover the positives and negatives of using this system for gas.
What is stainless steel press-fit?
Stainless steel press-fit is an advanced and efficient piping system in which the tube and fittings are joined together with a pressing tool. This system is joined by inserting the tube into the fitting and then the tool locates around the outside of the fitting and is tightened. This motion creates a secure and fully sealed joint.
Stainless steel press-fit systems are known to be extremely efficient and easy to install. Installers can be easily trained, reducing the need for highly skilled labour during setup.
Additionally, every gas-rated fitting is tested to meet the required standards, ensuring dependability and durability. This piping system can be used for a diverse range of gases, enhancing its suitability across different industries and applications.
One notable drawback of the stainless steel press-fit piping system is its limited suitability for high-pressure gas systems, particularly for flammable gas. For example, the Europress system is approved to be used for flammable gases up to 5 Bar pressure, while non-flammable gases are approved for up to 16 Bar.
What do gas applications require in a piping system?
In gas applications, a piping system must fulfil several requirements.
Firstly, the system must facilitate the seamless transfer of gaseous substances while ensuring the preservation and integrity of the piping material. You must only use materials that exhibit high resistance to corrosion and degradation caused by the relevant gases and the external environment.
Secondly, the system must not surpass the maximum pressure rating. This ensures the piping system is capable of withstanding the exertion of the gas without compromising safety or performance. Lastly, a reliable gas piping system must be a leak-free environment, preventing any unwanted gas emissions or potential hazards.
Piping systems for gas applications
The most common piping systems used for gas applications are as follows:
- Carbon steel
- Stainless steel and copper welded piping
- Stainless steel Twin Ferrule compression system
- HDPE with EF welded joints
- High-pressure hose
Stainless steel press-fit vs other piping systems for gas applications
Pressure capability
A welded or twin ferrule system can withstand higher pressure compared to a press-fit connection. This means a welded connection is better suited to high-pressure applications such as steam.
If the demand for pressure capability is high, welded or twin ferrule systems are better. For example, the Europress stainless steel Press-fit system is approved up to 16 bar for non-flammable gases and 5 bar for flammable gases. If your system exceeds this, opt for a welded or twin-ferrule system.
Durability
Stainless steel press-fit systems are more durable than other gas-appropriate piping systems, such as carbon steel. This is due to its high chromium content, which forms an oxide layer that acts as a protective barrier and prevents corrosion, even in harsh environments. Other piping systems like carbon steel are not as resistant to corrosion.
Installation
The installation process for carbon steel, stainless steel, and copper welded joints typically requires more time and effort. Using press-fit can be up to ten times faster than conventional welding techniques. Since press-fit can be crimped when it’s wet or dry, there’s no need to completely drain pipe contents prior to alterations.
Additionally, press-fit does not require any welding, meaning you don’t need to process pages of paperwork and hot work permits. Instead, you can get on with the job and get more projects done in less time. This also reduces the installation costs and allows the system to be able to be installed without the need for high-level qualifications.
Quality control
Compared to welding joints, press-fit is consistent and reliable every time. Each joint is the same, giving you full trust in your system’s integrity. Europress fittings also come with a 25-year manufacturer guarantee for all approved applications, including gas.
Availability
As installers increasingly opt for press-fit, the fittings are more readily available from suppliers. The Europress range can also be used with any approved “M” profile press jaws and is bulk stocked in New Zealand, ready for service.
Health and safety
Press-fit connections are much safer to install because they’re lightweight and don’t release harmful fumes into the environment. And, with no open flames or gas bottles, your health and safety paperwork is simplified and you can focus on getting the job done.
No-mess
With no welding and scale removal required, stainless steel press-fit installation eliminates mess. The clean surface is free of grease, oil, and other corrosive materials, ensuring it is hygienic and easy to maintain.
Reduced costs
Press-fit is more cost-effective to install because you don’t need to arrange a hot works permit or have a person on safety watch. And, since press-fit is so efficient, the system can be back in action sooner, reducing losses caused by unplanned downtime.
Additionally, the mechanical pressing tool does not require consumables which reduces material costs.
Gas applications for press-fit
Press-fit systems are often used in various gas-related industries. Here are a few examples:
1. Natural gas distribution
From residential gas lines to commercial and industrial settings, stainless steel press-fit systems offer a reliable and efficient method of joining gas piping and fittings. The safety and durability of stainless steel connections make them suitable for carrying natural gas over long distances.
2. Gas supply systems in buildings
Stainless steel press-fit fittings are commonly used in gas supply systems for residential, commercial, and industrial buildings. From delivering gas to individual units within a building to connecting gas metres, these fittings ensure safe, reliable, and durable gas distribution.
3. Gas processing facilities
Stainless steel press-fit is often used in facilities where gas is treated and separated, such as gas compression stations, gas processing plants, and liquefied natural gas (LNG) facilities. The ability to quickly modify and expand the system as per process requirements makes press-fit systems highly advantageous in these settings.
4. Gas-fired equipment
Press-fit systems are also utilised in connecting gas-fired equipment such as boilers, water heaters, and furnaces. The secure connections provided by press-fit systems ensure efficient gas flow to the equipment, minimising the risk of leaks and enhancing safety.
Press-fit piping NZ
In New Zealand and Australia, Europress is a preferred stainless steel press-fit piping system.
It is suited to a variety of gas applications, including natural gas, building supply, processing facilities, and gas-fired equipment. It can also be used for a variety of combustible gas, including both natural and liquid.
Hourly rate vs value-based sales
If you charge an hourly rate, you may be worried about reducing your labour hours. However, by switching to a value-based sales framework, your income can actually increase.
Remember, the customer isn’t paying for the hours on-site but for an effective solution. If you’re able to deliver the same outcome in half the time, most businesses will be willing to pay more for that efficiency.
If a press-fit solution gets the job done faster, your customers can get back to work and you’re free to take on another job – that’s a win-win.
Consult our experts to receive valuable insights and tailored guidance when implementing stainless steel press-fit systems for your gas application. We’re here to make the transition as easy and seamless as possible. Contact us today or browse the Europress stainless steel range.
