May 9th, 2011
If there’s one challenge faced by every mechanical engineer in the world, it’s how to reduce component lifecycle cost effectively, safely and with prudent design in mind. We offer titanium products as a workable alternative to weaker materials. Our engineers expertly craft titanium components such as flanges and seamless tube products to meet the highest of standards in diverse industries including farming, aerospace and the marine industries.
Qualities
A very particular combination of qualities lifts titanium above contenders. A very high weight to strength ratio is perhaps the most famous quality of titanium, although lesser known qualities (outside industrial familiarity) include high resistance to crevice corrosion, an aptitude to withstand both hot-dry and cold-wet acid gas loading, resistance to corrosion fatigue and erosion (with particular note of titanium’s excellent resistance to erosive and corrosive high temperature acid steam).
The density of titanium is approximately half that of other nickel-based metal options, which can afford our clients potential savings of around half their predicted cost per unit area.
Titanium also boasts a lifecycle up to around five times as long as competitor metals, particularly in reference to very harsh environmental pressure.
Surface Oxide Layer
The surface oxide layer of titanium is the key to its astonishing resistance qualities. Many of our clients commission products like titanium seamless tube implants to reduce the effects of continuous internal corrosion on things such as cooling systems.
The inherent excellent qualities of titanium have led to its application across the board in most industries. Our ranges of titanium products include flanges, pressure fittings, fasteners, butt weld fittings and various piping.
Tags: flange, pressure fittings. fasteners, seamless tube
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April 6th, 2011
When choosing a manufacturer and supplier for pipes and fittings, you need to find one that you can trust and rely on. Here are some of the many reasons why Chemi Petro is an excellent supplier for seamless pipe, flanges and other related materials.
Chemippetro uses state of the art manufacturing facilities to create the best possible products at affordable prices. When you are using seamless pipe for the transport or removal of liquids such as fuel or sewage, you need a product you can rely on to do the job well, and to last a long time. They are a leading UK supplier of such products, and are a British owned company.
All of Chemipetro’s products are fully traceable and certified, which means you can trust them to work well and not break or cause other issues. They supply piping in many different lengths, and you can even ask for custom pieces.
Have an emergency? Rely on Chemipetro to provide you with your special pieces as fast as possible. They also have a 24-hour emergency breakdown service so that you can rely on them to assist you with any breakdowns you can’t handle on your own. And they even offer worldwide delivery of their products.
They also offer logistical supply and component solution management to companies who want the assistance.
For more information about products, and how Chemipetro can help your company, send us an email: sales@chemipetro.co.uk or ring on: 01384 239441.
Tags: flange, Flanges, Pipe Fittings, seamless pipes
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January 9th, 2011
The majority of pipe connections are welded joints. However, at some locations in pipeline, installations it is necessary for the pipe to be able to be dismantled for maintenance. This may be at the location of a valve or pump, or just because it is necessary to get to something behind the pipeline. This is where it is necessary to install flanges in the pipeline which allow a section of pipe to be unbolted and removed.
If, however, the pipe has had to be constructed from special materials to cope with the corrosive properties of the liquid or gas being transported then these flanges can be expensive if made entirely from the same material. One solution is to employ lap joint flanges where the flange ring is made from a different material to the stub pipe it is fitted onto. At Chemipetro we manufacture a range of lap joint flanges of various sizes.
One advantage of a lap joint flange is that as it is not welded to the stub pipe and is free to rotate. Like a swivel ring flange it can twist to ensure it aligns correctly when the joint is assembled.
This all makes lap joint flanges seem the ideal solution, low cost and easy to fit. There are, however, problems. The fatigue life is also only one tenth that of a standard weld neck flange. Also, the gasket face sealing the pipes is the end face of the pipe lip and is therefore limited in size. The pressure rating of the joint is therefore limited making them no good for high pressure joints.
Tags: flange, Flanges, weld neck joints, welded joints
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November 12th, 2010
At Chemipetro we manufacture a wide range of pipe fittings and pipe flanges, and it is important that the specifier selects the correct type of fitting for the correct application.
An example of this is a lap joint flange. These consist of a normal circular flange plate with the usual bolting holes. Unlike a weld neck flange, where the central hole is the same size as the pipe and is designed to be welded onto the end of the pipe, the central hole of a lap joint flange is the size of the outside diameter of the pipe, and the flange is designed to slip onto the pipe. To fit the lap joint flange a lap joint stub has to be welded onto the end of the pipe which has a collar to stop the lap joint flange from coming off. So far, apart from a slightly different installation method there would seem to be little difference between the two types of flanges.
However the cost of the lap joint flange together with the lap joint stub is approximately one third higher than a weld neck flange. In addition the pressure holding ability is significantly less than a comparable weld neck flange and its fatigue life is approximately one tenth. So why would you use a lap joint flange?
The answer is flexibility. Like a ring neck flange, the collar can rotate, allowing flange plates to be more easily aligned which is especially useful on large diameter pipes. They are also easy to dismantle so making them suitable for situations which have a high maintenance requirement or need regular inspecting.
Tags: flange, neck flange, Pipe Fittings, pipe flange
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November 6th, 2010
When a pipeline needs to be isolated most people consider using a valve to shut off the flow. However there is one recurring problem with valves which everyone will have encountered at some time.
Over a period of time residue can build up in the valve seating preventing it from fully closing. Even when the valve is operated to its full extent, there is still a small gap caused by the obstruction making it impossible to fully close off the flow of liquid.
In a lot of situations this tiny residual flow when the valve is ‘closed’ is not a significant problem. However in some cases, such as when a pipeline has to be dismantled for maintenance, even the slightest flow can be a problem, particularly if the liquid is high temperature or toxic.
The answer is to use a spectacle flange. This is a flange plate which as its name implies is shaped like a pair of spectacles only in this case one spectacle is open and the other is blanked off. This plate is installed in the pipeline between a pair of flanges. In normal operation the plate is installed with the open side in the pipeline so it does not restrict the flow. However, once the pressure has been taken off the flange plates can be loosened and the spectacle plate changed to put the blind side in the flow. This will completely seal off the flow making the line safe to work on.
At Chemipetro we manufacture a range of pipe flanges and pipe fittings including spectacle flanges in a range of sizes.
Tags: flange, flange plates, Flanges, Pipe Fittings
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October 15th, 2010
At some location in any pipeline installation there will be a requirement for two sections to be bolted together. Usually this is where two pipe flanges are joined. In this location a number of bolts are required to hold the plates together.
To ensure that the flanges are secured correctly the bolts need to be tightened to the correct torque settings. This can be done manually with a torque wrench or by the adjusting the torque setting on a power tool.
Sometimes however with traditional hex head bolts the heads can round off when high torque settings are required. Also where they are subject to high usage the sockets can also become rounded and prone to slip.
A solution to this problem is to utilise a 12 point flange screw or ‘ferry head’ screw. As its name suggests, these have a 12 sided head rather than the more usual 6 sided of a hex bolt. With twice as many pressure shoulders to spread the load, more force can be exerted without the risk of distortion of either the head or the tool.
The other advantage to this type of bolt fixing is that for any given torque setting a smaller bolt head can be used. This is an extremely useful feature when it is required to insert bolts into recessed holes or awkward locations.
We at Chemipetro manufacture a range of different fixings to suit the range of pipe fittings we manufacture including ferry head bolts to various sizes.
Tags: 12 point bolt, fittings, flange, Pipe Fittings
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September 27th, 2010
At Chemipetro we manufacture a range of pipe flanges that take different gasket materials to suit any pressure application.
There are two main types of gasketed flanges, the raised face type and the ring type.
The raised face flange, as its name implies, is manufactured with a raised section which will mate with a similar flange on the other side of the joint. A flat gasket is sandwiched between the two faces to ensure a tight seal. The face of the raised section is textured to ensure a tight grip on the gasket.
In the past, these gaskets used to be made of asbestos, but these days are made from non toxic materials. These flat gaskets may also be of a spiral wound type with a metal filament filled wound into the disc. This deforms when compressed between the two flanges to form a stronger seal.
The second main type of gasketed flange joint is a ring type. In these types of flanges there is a circular or octagonal groove cut in the face of the flange. A metal gasket is then placed in the groove and again deforms to make a seal when the two flanges are bolted together. The flange faces may touch but do not form part of the pressure seal. The advantage of this type of flange connection is that the gasket does not take any of the transmitted loads between the flanges.
It is therefore possible to ensure that the correct flange type is selected and also to the correct standard for the specific application.
Tags: flange, Flanges, gaskets, Pipe Flanges
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July 15th, 2010
To the uninitiated a flange is a flange. However to the pipeline designer the use of a particular type of flange for a specific situation is critical. The use of the incorrect type of flange can lead to restrictions is flow rates, turbulence in the flow leading to cavitation and even premature failure. This can be catastrophic if it occurs in the wrong place at the wrong time. Also different types of flanges, although similar in appearance may be used for totally different applications.
A weld neck flange is probably the most common type of flange fitting for connecting two sections of pipe and is particularly used for high pressure installations; it consists of a round plate with the central bore the size of the pipe. They also have a collar which increases in thickness at the base of the plate. They are connected to the pipe by welding the collar end on to the pipe. They are recommended for installations which require a robust pipe joint especially if it is subject to temperature variations.
However there is also a long weld neck flange. Although this is similar in concept is has a considerably longer collar and is used for a completely different application. This type of flange is used where a nozzle is required for a pipe.
We at Chemipetro produce a wide variety of pipe fittings and flanges to ensure that you always have the correct specification of fitting for any specific application.
Tags: flange, Pipe Fittings, pipe flange, weld neck flange
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August 10th, 2009
The flange on any fitting is used primarily if not only for creating extra strength to a fitting. Otherwise known as a rim or a lip flanges cover a variety of uses in the field of engineering and plumbing respectively.
Flanges can be found on nearly every day things and a typical example of this would be the lens mount of a camera. Essentially what a flange does is it acts as an attachment for which other objects might be connected to another particular object as in the case mentioned above.
We can also find flanges being used on everyday things like fire hydrants and we never even realise it. When the fire department needs to attend to a fire emergency and they crank open the fire hydrant to release water, the connection on the end of the hose pipe is a flange connection.
Multiple uses for flanges
Did you know that even your toilet needs a flange connection? It is true that when your toilet was mounted a special kind of flange called a closet flange was employed to ensure that the toilet was mounted correctly and that no nasty surprises would ensue.
The reason why the toilet doesn’t leak or that water can’t go on through from the floor is because of the flange that acts as an inhibitor to that sort of thing happening. Our website is stock full of information on flanges and sizes so navigate through and place your order today.
Tags: flange, flange connections, Flanges
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