Prevention is better than a cure. In coal mining, these words offer particularly good guidance. Underground mining presents numerous hazards ranging from structural collapses, flooding and explosions. The tremendous amount of dust generated by activities in a coal mine creates breathing-related problems for workers as well as maintenance issues for machinery. Dust can also create a potentially explosive environment. Injuries and deaths occur every year either from accidents or health issues caused by exposure to coal dust. Mining companies can dramatically reduce these risks by applying rigorous dust suppression safety measures.
This blog investigates dust suppression methods and evaluates preventative versus corrective techniques that can effectively be used to suppress dust in underground coal mines, reducing the risk to workers and equipment.
Coal dust is a known carcinogen that causes miners’ lung disease (pneumoconiosis). Dust in the atmosphere can also create an ignition hazard when mixed with gas. Coal dust buildup is often a root cause of premature maintenance and failure of mining equipment. To this end, preventative suppression is critical.
There are a variety of ways to suppress dust in coal mines that offer a varying degree of effectiveness and efficiency. The most common methods are:
Bag filter system uses fans to circulate the air and trap the solids in a bag. However, this type of system is maintenance-intensive and requires bag filter change-outs — which is not conducive to work in an underground mine.
Dry fog system requires electricity, making it impractical for work below ground level.
Water is an ideal solution because it takes advantage of the mine's existing water supply, forming it into a spray to suppress the dust as soon as it is generated at the coal extraction point and all other areas where dust is generated.
Preventative vs. corrective dust suppression using water Preventative dust suppression
Logically, if a problem can be prevented from happening, then the time and cost of fixing it can be saved. Preventing dust from becoming airborne is critical in dust suppression. Three important elements to successful preventative suppression using water include:
Control pertains to how the water is controlled. It may be controlled by the presence of coal on the conveyor or by the belt’s motion. In either case, the water is isolated before entering the system.
Filter technology is used to remove contaminants from the water to assure reliable system operation.
Spray refers to a predetermined volume and pattern in which the water is delivered to the coal before the dust is generated.
The figure below shows a typical belt conveyor transfer point dust suppression system has two options: paddle valve (A) or belt-driven valve (B). Both are designed to operate only when there is coal on the conveyor.
Corrective or symptomatic dust control is implemented after the dust is created and is more challenging than preventative dust control. Dust particles come in a range of sizes with some as small as 10 µm which is invisible to the human eye. These small particles are the most dangerous to workers and equipment because they can remain airborne for long periods of time and eventually find their way into miners’ lungs, onto and into machinery as well as outside of the mine itself. Small particles are also the most difficult to remove from the atmosphere. Airborne coal dust can be addressed correctively using sprays. The principal is that the dust agglomerates with the water, causing it to fall under gravity. However, if the water droplets are too large, then the airborne dust particles are just moved around, resulting in very little dust being removed. To effectively remove the dust, the water droplets and dust particles must be the same size. Hence, the design of the spray head is of great importance. With preventative suppression, the size of the particle is less important.
Dust suppression in Columbia | case study
Parker Conflow, a leader in the industry, works continuously with mining companies and equipment manufacturers to enhance products for preventative dust suppression. In one case, at CI Milpa in Colombia, a manufacturer of metallurgical coal, Parker Conflow engineers designed two dust suppression systems for a mine as well as a fire suppression system on a roadway.
“We are focused on continually improving the efficiency and safety of our production sites and the Parker Conflow systems are an important part of this. We chose to work with Parker Conflow, because of the company’s expertise in the manufacture and installation of dust and fire suppression systems and are very pleased with the result.”
— David Fernando Jaimes Mojica, CI Milpa
Preventive coal dust suppression is vital to ensuring the health and safety of workers and protecting mining equipment from costly downtime and failure. For over 60 years, Parker Conflow has been providing dust suppression, fire suppression and water control equipment and services that help protect workers in the coal mining industry worldwide.
After more than a century of experience serving our customers, Parker is often called to the table for the collaborations that help to solve the most complex engineering challenges. We help them bring their ideas to light. We are a trusted partner, working alongside our customers to enable technology breakthroughs that change the world for the better.
This blog was contributed by Gary Wain, product manager, Parker Conflow.
The Oil & Gas industry sector is driven by safety and has been for over 60 years around the globe. Whilst the industry has had issues with incidents, it has been proven that by adhering to good working practices and following recommended installation techniques and procedures, these incidents can be minimized.
In summary, well trained, skillful engineering teams can help to reduce incidents and improve safety on Oil & Gas facilities. The key to this is for Owner Operators to ensure personnel are well trained and competent in their roles.Human errors are the main cause of Hydrocarbon Release (HCR) incidents
In the North Sea, HCR have been measured for many years and it is estimated that over half of HCR incidents are linked to or caused by human error (Source: Hydrocarbon Release Reduction Toolkit, Step Change in Safety).
Here, we will look at these human errors and identify the common ones in Small Bore Tubing (SBT) systems that can occur in Oil & Gas installations.
In instrumentation systems, leaks represent one of the most critical safety hazards. Common faults include, but are not limited to:
As these systems can carry hazardous substances, they have the potential to cause harm to personnel and equipment.Well trained personnel mean fewer issues
A well structured Small Bore Training (SBT) course delivered by well trained and experienced individuals can help eliminate these risks. Typically, a good course should address:
The objective of such training is to up-skill new recruits and apprentices whilst at the same time offering helpful tips and reminders to more experienced engineers. Everyone should leave the course having learned something new and being able to install connections safely.Parker Small Bore Expert (SBEx) training course
The Parker Small Bore Expert (SBEx) training course is designed to offer all of the above and the benefits to the engineers are:
It’s a sobering thought but the HSE (in the UK Oil & Gas industry) has consistently found that approx. 26% of SBT connections contain faults and typically these faults are aligned with the ones identified above (Source: Hydrocarbon Releases Offshore Information Sheet No. 2 / 2009, HSE).
Investment in the Parker SBEx Training Course can help address all of these challenges. Our goal is to help eliminate installation errors and reduce the potential for pressure related accidents. At Parker we are committed to providing your engineers with the right training courses via our trusted partners and distributors around the globe.
‘’Hydrasun, for over 30 years, continues to support the global energy sector, and other industry sectors, with training and technical competence at the heart of our service delivery. Hydrasun’s commercial training department has delivered over 1000 Parker SBEx courses to industry, training over 2700 delegates, in just the last 6 years alone, supporting our customers training and competency requirements, focussing on raising standards on safe working practices and procedures, and to ensure that Industry continues to deliver safe and reliable operations.’’
Stuart Gardiner, Hydrasun Group Operations Director (Directly responsible for HSE, Quality and Training)
Article contributed by Dave Edwards, Fittings Product Manager, Parker Hannifin Manufacturing Ltd., Instrumentation Products Division, Europe
One of the biggest challenges faced by transport managers is how to decide exactly which product you require to meet your needs. It all depends on what your vehicles are running on and carrying; why, where, when. A highly-pressurised liquid fuel in sub-zero conditions requires very different sorts of fittings to a gas in tropical or desert heat. Here is the quick guide to using our ‘STAMPER’ method to maximise quality and reliability when it comes to specifying and choosing the right product for the transportation industry.Wrong product, wrong results
With almost limitless variables in different parts of the industry across the world, it’s no surprise that companies sometimes request the wrong parts, and end up paying the price in reduced productivity, missed schedules and downtime. All of Parker’s products are manufactured to the highest, quality-controlled specifications, but if it’s the wrong part in the wrong place at the wrong time, then performance and safety might be at risk. And during the current pandemic emergency, that’s something you can definitely do without.STAMPER makes it simple
To keep things easy and avoid this problem, follow the STAMPER approach to identify and order exactly what you need. STAMPER is the easy-to-remember acronym that will set you and your customers on the right route to reliability. Just seven letters to cover everything you need to consider, and put you in control.So here is STAMPER:
Fittings sizes vary enormously, between 6 and 25mm – which do you need?
In a global market, you need to cater for outside conditions as cold as -40oC or as hot as +60oC, and engines running at +140oC or even higher. Can the components in your systems handle such extremes?
Vibrations from engines and road surfaces can affect how products perform, and temperatures can fluctuate widely within a few hours.
What materials are you using or transporting, and what sort of connections do you need to suit the substances on board?
Working pressures up to 350 Bar are commonplace and may be double this in the near future. Is what you’ve chosen up to the job, and will it last for as long as your vehicles?
Salt, sand, chemical spray and other road contaminants can cause corrosion, and the demands from these can change from region to region. Are you fully protected?
Parker’s robust supply chain and flexible production offers you peace of mind, backed up by the experience and problem-solving abilities of our expert team. We focus on supplying the right products, so you can keep your eyes on the road and your business.
This infographic shows how STAMPER can help you secure quality and reliability for different types of natural gas fuels that demand precisely the right sort of connection. Download full infographic.
STAMPER will ensure you ask yourself the right questions to pinpoint the most suitable parts for all your transport purposes. Try it today, and contact us if you need any extra help or advice before ordering from our range.
At Parker, we know transport and want you to feel confident and comfortable in the driving seat when it comes to choosing the products you need.
Be sure and safe with STAMPER.
Article contributed by Dave Edwards, Fittings Product Manager, Parker Hannifin Manufacturing Ltd., Instrumentation Products Division, Europe
Parker was recently approached by ENERAZ LLC, engineering subcontractor of Azpetrol Ltd. LLC and the biggest operator of filling stations in Azerbaijan, to provide several site-critical CNG distribution tube lines for the brand new CNG bus filling station in Baku.
Fitted with 14 CNG dispensers, 6 CNG compressors, 3 gas dryers and 3 chillers, the CNG filling station, which is located in the Narimanov district of Baku city, will be used by 300 buses of BakuBus LLC.Leak-free gas distribution lines for a safer environment.
Nearly 2,000 metres of Parker seamless tubes together with A-LOK® two ferrule tube fittings manufactured by Parker Instrumentation Products Division, Europe are among the key components to have been fitted onsite.
“As with all high-pressure gas fuelling systems, ensuring environmentally-safe CNG distribution was one of the main priorities for Azpetrol. This is something we’ve been able to guarantee by providing tubes and fittings that have been specifically designed to provide leak-free connections along the highly pressurised distribution lines.”
Murad Jafarov, Parker’s Azerbaijan Area Manager.
Image. 1. Parker's A-LOK® two ferrule fittings and tubing installed on three CNG compressors at the fuelling station.Superior corrosion resistance.
Not only do Parker’s CNG components guarantee leak-free distribution, they’ve been manufactured to withstand the corrosive effect of being exposed to the elements over a sustained period of time. The components are also robust enough to withstand the vibrations generated when the tube lines are being used.
“While this may have been the first time we’ve worked with Parker, we were aware of their products on board CNG vehicles, as well as within the wider CNG refuelling infrastructure across the world, which now includes Azerbaijan’s newest bus filing station. Having Parker’s components onsite has provided us with peace of mind that the risk of gas leaks, and the associated environmental impact is being kept to an absolute minimum now, and for many years to come.”
Elchin Mammadov, Head of Supply Department at Azpetrol.
Image. 2. A-LOK® two ferrule fitting with unique SuparcaseTM ferrule treatment offers excellent corrosion resistance and vibration protection.
Learn more about Parker Instrumentation Products Division's natural gas solutions for the transportation industry.
Article contributed by:
Murad Jafarov, Azerbaijan Area Manager, Parker Sales Company Central & Eastern Europe
Dave Edwards, Fittings Product Manager, Parker Hannifin Manufacturing, Instrumentation Products Division, Europe.
When designing a leak-free instrumentation system, one of the first steps to ensuring safety and reliability is to select the right tubing for the intended application. No system integrity is complete without this critical link and its compatibility with the rest of the components. In this post we list four key parameters to consider when selecting quality instrument tube for use with Parker A-LOK® and CPITM tube fittings.
Parker’s instrument tube fittings have been designed to work in a wide variety of applications that demand the utmost in product performance. Their compatibility with selected tubing is critical for providing consistently high-level of reliability.1. Material compatibility
The most important consideration in the selection of suitable tubing for any application is the compatibility of the tubing material with the media to be contained. Table 1 lists common materials and their associated general applications. It also lists the minimum and maximum operating temperatures for the various tubing materials.
In addition, Parker instrument fittings are designed to work on like materials. Stainless steel fittings should be used only with stainless steel tubing, 6MO fittings with 6MO tubing, etc. The practice of mixing materials is strongly discouraged.
Table 1. Common tubing materials with their applications and operating temperatures.2. Tubing hardness
The key is to select tube material which is softer than the tube fitting material. For example, Stainless Steel tubing should be specified as Rb 80 or less hardness value. Parker A-LOK® / CPI™ Tube Fittings have, however, been tested on tubing up to Rb 90 hardness level with excellent performance.3. Wall thickness
Proper wall thickness is necessary to accommodate accepted safety factors relative to desired working pressures. Tube tables published in Parker’s literature, list the tube Outside Diameter (OD) sizes and Wall Thickness combinations per material for safe use with Parker A-LOK® and CPITM tube fittings. Do not use tube with wall thickness values which fall outside of the table ranges.
All working pressures are calculated following the recommendations contained within the ASME B31.3 Chemical Plant and Petroleum Refinery Piping Code and ASME B31.1, Power Piping. All calculations are confirmed via rigorous and extensive testing procedures at our Parker R&D Laboratories. Each calculation utilises an allowable stress figure that incorporates a 4:1 factor of safety.
All testing is carried out to replicate actual working conditions where possible. Parker does not ‘support’ tube to facilitate failure at certain points as this does not truly represent the forces that our products would see in ‘real-time’ applications.
Not all manufacturers support their assemblies’ pressure rating claims with extensive testing. In these cases it is important to understand the implications associated with using unverified recommendations.Note: Gas Service
Special care must be taken when selecting tubing for gas service. In order to achieve a gas-tight seal, ferrules in instrument fittings must seal any surface imperfections. This is accomplished by the ferrules penetrating the surface of the tubing.
Penetration can only be achieved if the tubing provides radial resistance and if the tubing material is softer than the ferrules. Thick walled tubing helps to provide resistance and the table below provides a range of wall thickness options available for safe use with Parker tube fittings. The ratings in blue indicate the combinations of diameter and wall thickness which are not suitable for gas service.
Table 2. Maximum working pressures (in psig) for imperial tube in 316/316L Stainless Steel material based on tube O.D. size and wall thickness combinations.4. Elevated temperatures
At elevated temperatures, a de-rating factor should be applied to the working pressure listed in the Parker tube tables. Please see the table below for the de-rating factors for the common materials Parker offers in our A-LOK® tube fittings range.
In all cases, tube fitting assemblies should never be pressurised beyond the recommended working pressure.
Table 3. This table lists the de-rating factors which should be applied to the working pressures for elevated temperature conditions. Simply locate the correct factor in this table and multiply this by the appropriate value in the pressure tables e.g. Table 2 (above) for 316/316L SS.
* Dual-certified grades such as 316/316L, meet the minimum chemistry and the mechanical properties of both alloy grades.
Register today for our industry-leading SBEx (Small Bore Expert) training and learn how to specify and install efficient, safe and leak-free small bore tubing systems.
The Right Tubing + The Right Fitting + SBEx Training = High Integrity Solution.
Article contributed by Dave Edwards, product manager - tube fittings, Instrumentation Products Division Europe.
Mixing high- and medium-pressure fittings or incompatible parts makes systems unstable, inefficient and potentially dangerous. At worst, it can cause a potentially fatal explosion.
At Parker, we’re all about making our products safe as possible and helping customers to minimise risk. Safety doesn’t happen by accident, so you need to know how to avoid the risk and what to do if you come across a mixed-pressure connection that could be hazardous.Dangerous connections
Our engineers have recently come across situations where customers have created system connections using components with different pressure ratings. These instances are rare, but they can and do happen; creating unnecessary risks for everyone using the system.
If a Medium pressure tube is machined with High pressure tooling, this reduces the wall thickness below safe limits, and can lead to catastrophic failure. Similarly, combining a High pressure fitting with a Medium pressure tube means the male and female connections will not fit correctly. It may seem like the threads match, but the gland nuts will not engage to the required depth for the system to remain safe. The mechanical properties of the metals used in High and Medium pressure fittings are very different, meaning medium pressure units cannot withstand the application of high pressure.
Different pressure-rated fittings just don’t mix, and there’s no safe way to combine Medium and High pressure elements. Mixing different types of connections, product lines or parts from different manufacturers is also dangerous and removes any warranties.
Remember, just because something "can be done", doesn't mean that it "should be done"!How it happens
The diagram below shows how the positions of collars and glands are different, depending on the pressure of the connection.
Fig. 1. The difference in positions of collars and glands in medium and high pressure connections.Avoiding and reducing risk
We recommend that you never mix together:
All Parker Autoclave Engineers fittings carry our manufacturer’s name, part number, material, heat code and maximum pressure rating. We also make it easy to distinguish between different pressure ranges by clear notch markings on High pressure nuts.
Parker Instrumentation Products Division provides specialist SBEx (Small Bore Expert) safety training on correct and safe assembly of instrument connections to improve safety and skills across the engineering sector. For further support you can contact your local Parker Instrumentation Products distributor or visit our website.
Fig. 2. Notch marking on Parker Autoclave Engineer's High pressure fitting nuts provides differentiation from Parker's other pressure fittings.Making a safe connection
If you need to assemble Medium pressure with High pressure in one system, we recommend the use of Parker adapters. For safety reasons, the Maximum Allowable Working Pressure (MAWP) rating is based on the lowest rating of any component (Maximum 20,000 psi).
Fig 3. Male-to-male medium-pressure to high-pressure adapter.
The second adapter (Fig. 4) overcomes the problem of the final rotational position not being predictable, making it safe and practical to use when positioning elbow/tee fittings and valves.
Fig. 4. Male-to-male adapter.
If you come across a mixed-pressure arrangement, you should immediately isolate, remove and replace it with a proper connection using matching and compatible Parker parts. Otherwise, there is a real risk of failure or burst that could lead to catastrophic failure, resulting in injury or death.
Learn more about Parker Autoclave Engineers range of fittings and tubing suitable for low, medium and high pressure applications:
Article contributed by Franck Grignola, product manager EMEA - high pressure, Instrumentation Products Division Europe.
Securing leak-free connection of impulse lines to manifolds for applications that use differential pressure flowmeters is a subject that has taxed instrumentation engineers for more than a century. Back in 1910, when the very first orifice plate installations made an appearance, they involved 33 connections and 16 lengths of tubing! Thanks to the development of highly integrated manifolds, today’s installations often only require just two tube connections. However, ensuring the long-term integrity of these connections remains a contentious issue.
The first manifolds on the market used NPT taper threads for their tube connections. Despite being the bane of installers’ lives, this type of technology continues to enjoy widespread use today, with most manifold manufacturers still offering it as an option. But much better tube connector technologies are now available.What’s wrong with taper threads?
Unlike compression type tube fittings with one or more ferrules, taper thread fittings rely on the threads themselves to provide the seal. During make-up, progressively larger diameter threads on the fitting are compressed into progressively small diameter threads on the manifold, until eventually there is no clearance left between the crests and roots of the threads and they effectively form a metal-to-metal seal.
NPT taper thread fittings are popular because they are relatively inexpensive, but they also have distinct disadvantages. The fittings cannot easily be installed with a specific torque, which makes it all too easy to crack or distort the female part by applying too much torque, or to apply too little, resulting in potential leak paths due to incorrect thread cling. There is also always some thread clearance due to manufacturing tolerances, which means that if the fitting is not tightened to the point where thread deformation creates a metal-to-metal seal, there is a spiral leak path. Furthermore, the upper and lower machining limits of NPT taper threads mean that there might only be two turns of thread engagement in an assembled connection; the most reliable means of preventing this is to use, if possible, a matched pair of male and female parts produced by the same manufacturer.Taper thread can suffer from limited thread engagement
Another major disadvantage of NPT fittings is that their radial orientation cannot easily be adjusted without compromising connection integrity.
Most installers of NPT fittings elect to use some form of thread sealant to help prevent leaks. This usually comprises a fluid carrier which transfers a filler compound into the threads and then cures. Unfortunately, not all sealants act as lubricants and they are also very easy to misapply. Too much sealant can cause system contamination, which can result in unseated valves or blocked lines, while too little can allow the threads to gall (cold weld) during installation, requiring replacement of the entire manifold and tubing system. A further problem is that the fitting cannot be adjusted once the sealant has cured.
A popular alternative approach is to use PTFE tape as a sealant. This additionally acts as a lubricant during assembly and facilitates tighter connection of taper thread fittings – although it can lead to over-torquing. Another issue with PTFE tape is that it has a tendency to shred and cause system contamination. For this reason, its use is often prohibited in sensitive instrumentation systems.
Parker now offers two manifold connection solutions – PTFree connect and inverted A-LOK – which completely eliminate the need for taper threads, PTFE tape and thread sealant.PTFree connect™
Our PTFree connect system provides a simple means of connecting impulse lines to manifolds without involving the use of taper threads, PTFE tape or thread sealant. Available as an option for every type of manifold valve block that Parker produces, PTFree connect offers different versions that accommodate metric tube sizes from 6 to 12 mm and imperial sizes from 1/4 to 1/2 inch.
Parker’s PTFree connect system is available on all types of manifold
Manifolds fitted with the PTFree connect system are exactly the same as their standard counterparts, except that their inlet/outlet and drain/test ports can be factory fitted with male adapters, supplied complete with a preassembled nut and ferrule(s). The (parallel) thread on the male adaptor is screwed into the manifold and uses the same type of stainless steel sealing washer as the valve heads, to provide a high-pressure leakproof and bubble-tight connection. The adaptor is securely locked by a cam or locking plate mechanism. We have used this connection principle well over a million times, so you can be confident that it’s a tried and trusted system.
Installation of PTFree connect manifolds is simple. A variety of connection bodies can be used – including straights, elbows and tees – and all angled components can be freely swivelled to facilitate secure positioning. And if anything does go wrong during installation, the sacrificial element is the male adapter – not the manifold – so the cost of remedial action is considerably less than with any other type of connection.Inverted A-LOK fittings
More recently, we developed inverted A-LOK fittings, designed specifically for connecting impulse lines directly to manifolds. Like our PTFree connect system, these also eliminate taper threads and the need for PTFE tape or thread sealant, but they do not involve the use of adapters – the tube is fitted directly to the manifold. Each of the two manifold ports forms the female half of a connector and is machined with a cone-shaped orifice and a standard parallel (non-tapered) thread. Each male part comprises a tube and an inverted nut, with threads on its outside surface, which drives two ferrules forward during assembly; the pressure seal is provided by the front ferrule – not the threads of the connector.
Inverted A-LOK fittings facilitate direct-to-manifold connections
A key advantage of our inverted A-LOK fittings is that the tube is not twisted during installation – all make and remake motion is transmitted axially to the tubing. Since there is no radial movement of the tubing, it is not stressed and its mechanical integrity is not compromised. These fittings are suitable for both thin wall and thick wall tubing, can be used with a wide variety of tubing materials and accommodate repeated disassembly and remake. However, they still require careful installation. If the internal cone becomes damaged, the manifold block will need to be replaced. And due to cross-hole drilling in the block, the technology is not available on all types of manifolds.
Spencer Nicholson, product manager, instrument manifolds, Instrumentation Products Division Europe.
Industrial settings with strenuous applications, such as thermal cycling and vibration, are recognised as some of the toughest environments for tube fittings. In all cases such applications demand highly precise, leak-free technology to ensure protection from vibration and thermal cycling. For example, in power generation, nuclear and chemical plants, worker and atmospheric safety is business-critical.
Engineers face numerous options when choosing tube fittings for instrumentation, process and control systems and equipment. In most cases, buyers need a solution that will minimise risk, prevent leakage and provide robust value for money.
In instrumentation installations such as impulse pipework, typically a three piece (single ferrule) or four piece (double ferrule) design is preferred. While both types of fittings have their own merits, the four piece fittings are slightly better known in the market. But in some cases, there are definite advantages for choosing a three piece, single ferrule design.Benefits of single ferrule designs
With just three pieces required - a nut, body and single ferrule - this type of fitting is easy to install. The ferrule design also provides a strong anti-vibration hold on the tube.
Single ferrule fittings typically offer six core benefits:
Many engineers constructing fluid or gas handling systems aim to eliminate potential leak paths. This approach also applies to the design of tube fittings.
With single ferrule fittings such as CPI™, only two potential leak paths need sealing. But double ferrule fittings have three or more paths to seal, depending on the fitting design and composition.
2. Sealing mechanism
With double ferrule designs, the front ferrule contacts the body seat over the entire surface. This causes the end load to be distributed over a wide area.
With Parker’s CPI™ design, there is less body seat contact; the end load is concentrated over a smaller area. Higher contact pressure enhances the ability of the single ferrule solution to seal low density gases, which means it can out-perform its double ferrule counterpart in some applications.
The CPI™ fitting also has the benefit of the one-piece ferrule, utilising Parker’s unique Suparcase™ system. This offers better corrosion resistance and is less likely to be damaged in service; but it’s not available on the front ferrule in twin ferrule tube fitting designs.
3. Dampening vibration
Tubing vibration can affect the ferrule seal. However, with single ferrule designs, a light compression grip at the rear of the ferrule isolates seal points from system vibration. This creates a cushioning effect, providing excellent vibration resistance – again, a potential advantage over double ferrule designs.
4. Better performance in temperature cycling
During temperature cycling, metals naturally expand and contract; this causes dimensional changes in fitting connections. With single ferrule fittings, the ferrule features a ‘spring loaded’ effect; this creates a constant tension between the fitting body and nut.
The spring action compensates for cycling changes. By storing excessive force in the bowing action of the ferrule, it maintains effective sealing points. There is no corresponding spring action with double ferrule designs.
5. Ease of installation
The CPI™ single ferrule tube fitting uses a Molybdenum Disulfide coated nut, which reduces the torque required to make up the assembly by as much as 40%. This coating also gives the added advantage of precise and consistent re-makes. As a result, the fitting can last longer in service - reducing potentially costly maintenance work.
6. Precision assembly
Both single and twin ferrule designs can potentially seal all leak paths, as long as they are assembled precisely. With double ferrule fittings, there’s scope for incorrect alignment, lining fittings up backwards, or leaving a ferrule out completely.
Ultimately, with fewer components, there is less that can go wrong; single ferrule solutions are quicker and easier to assemble, so the scope for error is reduced. With Parker’s CPI™, fittings are sold completely assembled and ready for immediate use.
Offering superior corrosion resistance, the CPI™ product series is manufactured to the highest quality standards and available in a range of sizes, materials and configurations. There is documented heat code traceability on stainless steel fittings for nuclear and other critical applications.
Article contributed by Dave Edwards, fittings product manager, Instrumentation Products Division Europe.
The Ash Probe is a portable instrument for measuring the ash content of coal, providing the user with highly accurate readings within seconds. Instantaneous readings can be made of coal quality on stockpiles, trains or trucks, allowing customers to check the quality of incoming coal supplies and specifications against their suppliers’ claims.
Widely used in the mining industry, it allows suppliers to verify the quality of their product and therefore have confidence that the delivery will be accepted by the client ensuring the agreed price per tonne is paid.
Ash Probe was the first portable product to be developed by Bretby Gammatech (now a part of Parker's Instrumentation Products Division) with the first one sold to a mine in South Wales. Since then, hundreds of Ash Probes have been delivered all around the world, with many of these customers also purchasing Ash Eye or Lab Ash equipment.
Like all Parker Bretby Gammatech’s products, the Ash Probe uses natural gamma radiation, with no radioactive sources.
The Ash Probe has been developed to withstand harsh environments and is therefore renowned for being extremely robust. It is currently being used in temperatures down to -50oC in Mongolia, China, as well as in temperatures over 40oC in many African countries.Ash Probe – features and benefits
Pic. 1. Parker's Ash Probe with a display unit.How to operate the Ash Probe
The Ash Probe comprises two main parts: a probe and a display unit. To obtain an ash reading, the probe is pushed into the coal pile or truck to be tested. After a few seconds an ash result shows on the display unit.
In order to obtain an accurate assessment of the ash content of the whole pile (or wagon load) the probe is inserted at several locations. This is repeated until the desired precision level has been reached.
In Pile Mode up to 99 probings per pile can be made and data from up to 99 piles can be stored. In Truck Mode up to 12 probings per truck can be made and data from up to 600 trucks can be stored.
Calibration is readily achieved by the customer using the supplied calibration sample gathering equipment.
Tests on a wide range of coals from over twenty countries on five continents have shown that the Ash Probe can measure the ash content to closer than 1% (1σ) ash. In some cases better than 0.5% (1σ) accuracy has been achieved with high-grade anthracite.Applications
The Ash Probe is currently being used by customers around the world to provide quick testing for the ash content of:
Article contributed by Gary Wain, piping products, product manager, Instrumentation Products Division Europe of Parker Hannifin.
The quest to find and retain skilled machinists and engineers is harder than ever with Eurozone countries experiencing their lowest ever levels of unemployment.
Instrumentation Products Division Europe (IPDE) and Parker globally recognizes that providing competitive benefits is just one factor in achieving this. To develop a high performing and stable workforce we must engender the right values and behaviours coupled with a shared vision, supported by solid strategies and delivered through engaging leadership. But what about beyond this?Apprentices will define and deliver our future.
In 2017, IPDE introduced its apprenticeship scheme aimed at attracting and developing the finest mechanical engineering apprentices in our regions, who will define and deliver our future for many years to come.
A mechanical apprenticeship within IPDE affords talented people the opportunity to ‘earn, learn and qualify’ and also prepares the foundations for a fantastic career in one of the world’s most successful organizations.
“Having worked with various apprenticeship schemes in my previous roles, I was keen to introduce this scheme into IPDE so that we can develop and grow our own talent from within. It also enables us to protect our business for the future as our most skilled professionals move into retirement.”
Andrew Spivey, General Manager of Parker Instrumentation Products Division Europe.Former apprentices have made impressive progress.
IPDE has a strong track record of developing people through previous apprenticeship schemes. Former apprentices have made impressive progress in the organization and currently hold roles such as Division Supply Chain Manager; Production Manager; Lean Manager; Deputy Production Manager; Value Stream Champion; Senior Quality Engineer and Design Engineer.
Neil Shapland, Materials, Planning and Production Manager at IPDE, who began his career with Parker as a manufacturing apprentice 24 years ago, worked within several key areas including value stream manager roles and planning and production manager. He believes that his apprenticeship and the skills he learnt stood him in ideal ground to progress within the organization. He said:
"I am passionate about the manufacturing apprenticeship programme and the positive impact it will have on the business as a whole. I believe it provides the ideal opportunity to nurture and develop first class engineers, our next top manufacturing leaders and committed team members of the future."
Neil Shapland, Materials, Planning and Production Manager at Parker Instrumentation Products Division Europe.
Article contributed by Michelle Liney, Group HR Manager, Instrumentation Products Division Europe of Parker Hannifin.