http://www.onicesroofing.com/Are Composition Shingles and Asphalt Shingles the Same Thing? The roofing industry is full of different names and terms that are hard to understand as a homeowner. This can be confusing and often frustrating. Especially when different roofing contractors use different terms to mean the same thing. This brings us to a commonly asked question, “Are composition shingles and asphalt shingles the same thing?” For over 30 years, the team at Bill Ragan Roofing has helped homeowners understand the lingo, terminology, and other aspects of the roofing industry. Now we'll be doing the same thing for you. To start this article off, we'll clarify if composition shingles and asphalt shingles are the same. After that, we'll give you 3 things that every homeowner needs to know about a composition shingle roof. Are composition shingles and asphalt shingles the same thing? Yes, composition shingles and asphalt shingles are the same thing. It's simply just another term the roofing industry uses for asphalt shingles. The term “composition” comes from the fact that asphalt shingles are a composite of man-made materials. These materials consist of fiberglass, tar, and granules put on a fiberglass mat to make a shingle. Insurance companies also call them composition shingles on claims for roof damage. So, if you see “composition” on your insurance claim, there's no reason to panic. At the end of the day, you might hear different roofing contractors use one or the other. But the majority of the roofing industry uses asphalt shingles. Things to know about composition (asphalt) shingles Now you know that composition shingles and asphalt shingles are the same thing. After learning this, you're ready to learn the 3 main things every homeowner needs to know about composition shingles. 1. The 3 types of composition shingles There are 3 types of composition (asphalt) shingles: 3-tab, architectural (dimensional or laminate), and luxury (shake look or slate look). All 3 shingles have different looks to fit the style you're looking for and your budget. 3-tab shingles lay flat and get their name from the 3 tabs on each shingle strip. Architectural (dimensional) shingles have a random pattern and shadow lines to give your roof more dimension. Some even simulate the look of a wood shake roof. Luxury (shake roof and slate roof) shingles are larger and thicker than the other shingles. Most luxury shingles are designed to look like slate tiles, hence the name slate look. 3-tab shingles used to dominate the roofing industry, but now architectural shingles are the most common type installed on roofs today. Luxury shingles are as heavily marketed as architectural shingles, but they're around double the price. No matter your budget or the look you want, you'll be able to find an asphalt shingle that fits your needs. 2. The materials and components that make up a composition shingle roof While choosing which shingle you want is the fun part; your composition roof system is much more than the shingles you see from the street. It's a combination of key roofing components and materials that come together to form a complete roof system. These other roofing materials and components are just as important as the composition shingles themselves. The main materials and components that make up a composition roof are: Roof decking Roof flashing Underlayment Drip edge Ice and water shield Shingles Ridge capping Roof vents Pipe boots Flashing These materials come together to make a complete roof system that protects you and your family. To learn more about the functions of each roofing component and material, click on the hyperlinks attached to the materials or check out the 9 materials included in your roof replacement. 3. The lifespan of composition shingle roof A composition roof's lifespan is the number of leak-free years you get out of it. Remember the 3 types of composition shingles we discussed earlier? Well, each comes with a specified lifespan from the manufacturer. 3-tab shingles can last up to 25 years and live the shortest of the three types of composition shingles. On the other hand, both architectural and luxury shingles have a lifespan of around 30 years. But the luxury style is thicker and has the possibility to go over 30 years and up to 50 under the right conditions. As long as the composition shingles are properly installed and your attic is adequately ventilated, they'll get really close to the lifespans above. However, other factors impact how long a composition roof ultimately lasts. How much does a composition (asphalt) shingle roof cost? Now you know 3 things every homeowner needs to know about a composition roof. However, there's still one more crucial thing you need to learn. This, of course, is how much a composition shingle roof costs. The problem is, the roofing industry avoids talking about pricing or anything else relating to cost. But here at Bill Ragan Roofing, we do things differently. That's why we wrote another article that gives you the cost of a composition (asphalt) roof and the factors that impact the price of a replacement. The team at Bill Ragan Roofing has provided homeowners in Nashville and surrounding areas with high-quality asphalt roofing services since 1990. Whether you need repairs or a full roof replacement, you can count on our workmanship backed by a lifetime warranty to take care of your roof for decades to come. To learn what you can expect to pay for a composition roof replacement, check out How Much a New Asphalt Roof Costs: Pricing, Factors & Considerations. What Are Laminated Shingles? You've just gotten off the phone with another Marietta roofing contractor and he only seemed interested in installing laminated shingles on your roof. He's told you that they are his most popular seller, but does that mean they are the best shingle for your roof? Are laminated shingles really that great, or is it just sales hype? 3-TAB AND LAMINATED SHINGLES – WHAT A MARIETTA ROOFING COMPANY KNOWS ABOUT HOW THEY ARE MADE The difference between laminated and 3-tab shingles is really quite simple. They are both made from the same basic components, but one just uses more of them. The laminated shingle is essentially a beefed-up version of a 3-tab shingle, so it makes some sense to discuss the simpler 3-tab shingle, first. Twenty or so years ago, 3-tab shingles were used almost exclusively to cover residential roofs. Today's 3-tab shingle has not changed much, in terms of basic construction and size. A 1-ft. tall X 3-ft. wide shingle slab is cut with slots at one end to create three tabs, each about 5-in. tall X 12-in. wide. What results is the well-known and widely used “3-tab shingle.” The shingles are overlapped and nailed in place during installation. After a roof is finished the tabs are the only visible part of each shingle. Those unfamiliar with roofing often assume each tab is an individual shingle. Of course, now you know what every professional Marietta roofing contractor knows. Each visible “shingle” is, in fact, one of the tabs in a 3-tab shingle. As suggested earlier, laminated shingles are actually an enhanced, stronger version of a standard 3-tab shingle. Unlike a 3-tab shingle, a laminated shingle has an extra layer under its lower half. This gives the tabs on a laminated shingle a thickness that is twice as deep as it would be otherwise. But why is this thickness necessary? The primary goal of a laminated shingle is to provide a more natural and deeper look than that offered by a conventional 3-tab shingle. That is why laminated shingles are sometimes called architectural shingles. A laminated shingle creates depth by featuring tabs of varying widths that are separated by large, randomly spaced gaps. The large spaces between the cut tabs highlights the thickness of the tabs, creating a wonderful, visually appealing effect of depth. Some laminated shingles employ different shades, tones and even contrasting colors to create an even more distinctive, yet natural appearance. 3-Tab And Laminated Shingles – A Performance Comparison That Every Marietta Roofing Contractor Understands The next questions to ask is, how does the extra material used in a laminated shingle translate into performance? By virtue of their heavier construction, laminated shingles are able to last longer than 3-tab shingles. With more protective asphalt, granules and fiberglass per square foot, laminated shingles can resist sun, heat, impact and water damage more effectively and for a longer time than 3-tab shingles can. This is reflected, in general, by longer warranty times and higher wind ratings for laminated shingles. A side-by-side comparison of 3-tab and laminated shingles is presented below. Note that the warranty information provided is generic in nature and provided for reference, only. You should confirm product specific shingle warranty details with your Marietta roofing contractor before you make any purchasing decisions. How Long Can You Expect Your Asphalt Roof to Last? When investing in a new roof, you're expecting to get as many years out of it as possible. This is especially true for an asphalt roof. One of the most crucial questions customers ask is how long their asphalt roof will last. While a roofing contractor can say 25 or 30 years, you're probably wondering if it'll actually last that long. Luckily, we're here to help you understand the lifespan of your asphalt roof. The team at Bill Ragan Roofing has been installing asphalt roofs in the Nashville area since 1990. We know what it takes to maximize the life of your roof with our workmanship and attention to detail. The truth is, you should get pretty close to the manufacturer's lifespan of your roofing materials. But there are a number of factors that ultimately determine how much life you'll get out of your asphalt roof. By the end of this article, you'll know how long your asphalt roof should last and the factors that affect its lifespan. And to help save time and make your research a little easier, grab the Asphalt Roof Replacement Cheat Sheet at the very end. How long will your asphalt roof last? There are three types of asphalt shingles, 3-tab, dimensional, and luxury. But for this article, we're going to use the two most common asphalt shingles, 3-tab and dimensional, as examples. 3-tab shingles generally come with a 25-year manufacturer warranty. Dimensional shingles come with a 30-year manufacturer warranty. Vented properly and installed correctly, you should get around 80-85% of the life span out of an asphalt roof. That means you can expect to get about 20-22 years out of your 3-tab shingle roof and 25-28 years out of your dimensional shingles. posted an update 1년, 1개월전
http://www.wellfarengineparts.com/Piston rings have triple purpose
Piston rings seal the combustion chamber. They are set with precision so as to apply the correct pressure on the cylinder wall or liner, which ensures there is a consistent film of oil across the cylinder’s working surfaces. This provides sufficient lubrication and protects against wear.
Piston rings from Perkins come as three rings. They are the top compression ring, then the intermediate compression ring and finally the oil control ring. These parts are relatively small in size but play a large role in the main cylinder block of your engine.
Their function is to seal off gases generated in the internal combustion process, help with transferring heat to the cylinder wall and then to both lubricate and scrape down oil from it. Getting the quantities of oil right is vital. Too much oil will cause it to burn off during combustion potentially making your engine produce blue smoke, too little will cause the engine ultimately to seize.
The primary role of the top compression ring is to seal off the majority of the combustion gases to ensure you get the maximum power output from your engine. Any failure or weakening of the piston ring in this area means your engine is working less efficiently than it should.
The bottom ring is responsible for most of the oil control, helping to make sure the right amount of oil is used to lubricate the working surfaces of the cylinder, while the intermediate ring helps with both functions, playing a finishing role in the combustion sealing as well as the downward oil scraping.
The result of these three rings working in harmony is sufficient lubrication within the cylinder bore, ensuring that no undue wear occurs at any time.
How Long Do Piston Rings Last?
Piston rings are a vital engine component since they seal the gap between the piston and the cylinder walls. High quality and long lasting piston rings are a must for all types of engines.
So, how long do piston rings usually last? Piston rings are typically built to last as long as the engine. As a result, piston rings usually last somewhere between 50,000 miles to 250,000 miles depending on their maintenance.
On an average, the life expectancy of piston rings is around 100,000 miles. One has to replace piston rings if they are damaged or worn out.
Life Expectancy Of Piston Rings
Piston rings are typically built to last as long as the engine. Since motorcycle engines last somewhere between 50,000 miles to 250,000 miles, piston rings should last around the same lifetime as well. On an average, piston rings should last around 100,000 miles.
Again, this is a highly subjective number depending on how good your maintenance is, the piston rings quality, and several external factors including engine oil levels, riding conditions (dusty regions are bad), etc.
If the piston rings are worn out or get damaged at a faster rate, then you might have to replace the piston rings far far earlier than their expected lifetime.
When Should You Replace Piston Ring
Firstly, if your engine has run more than 100,000 miles, then probably it is time for replacing the piston rings. But, do not go to all the lengths of removing the engine cylinder and taking the piston just to replace the piston rings if you are not facing any issues with the engine.
Rather, let things continue as long as there are no problems occuring.
However, as soon as you face a problem and have to repair an engine component, it is best practice to inspect piston rings and replace them if the engine has run more than 100,000 miles.
This is because if you are reworking on an engine component, its best to inspect all parts since you don’t want to go back to it again after sometime. Any work on the engine components like piston, piston rings, crankcase components, cylinder – are all cumbersome, time consuming and most of all, a costly affair.
Other times when you need to replace piston rings are when these rings are damaged or worn out.
Bad piston rings will cause more damage to both the cylinder walls as well as the engine itself. It’s better to replace the bad piston rings early rather than wait for it to damage other components.
Also, you cannot repair piston rings. Any sign of damage, just replace it. There is no easy way out here.
Replacement Cost Of Piston Rings
While piston rings cost around $50 to $200, replacement cost of piston rings is more than $2000.
This is because replacing piston rings is a laborious task. Although piston rings themselves doesn’t cost much themselves, the labor charges will be too high since piston rings replacement means taking out the engine cylinder head, removing piston from the engine, and then replacing the rings.
Typically, all this process will take around 10 hours altogether. As a result, the labor cost is far too high and costs so much for a simple piston rings replacement.
How Do I Know If My Piston Rings Are Bad
If the piston rings are damaged or worn out, there is no direct method to determine it. However, there are several symptoms which combined together will indicate that the piston rings have gone bad and should be replaced immediately.
First and foremost sign of bad piston rings is if you are seeing white or gray smoke coming out of the exhaust. White smoke is a clear indication that the engine oil is getting burnt in the combustion chamber. And the oil can only enter the combustion chamber if the piston rings are not sealing the piston and cylinder correctly.
In the same vein, if the engine is being consumed excessively and you are constantly seeing low engine oil levels despite several top ups, it is mostly likely because the piston rings are bad and are allowing the oil to moves into the combustion chamber to get burnt.
Apart from the indications from oil, you can also suspect bad piston rings from the engine. If the engine power and acceleration is consistently low, then the culprit is either the inlet and exhaust ports or the piston rings.
To pin point the culprit, you can test the engine compression. If the engine compression is considerably lower, then it is without a doubt certain that the piston rings are damaged and are not working properly. Here is a detailed post on on
To pin point the culprit, you can test the engine compression. If the engine compression is considerably lower, then it is without a doubt certain that the piston rings are damaged and are not working properly. Here is a detailed post on on signs of bad piston rings for more details.
One last sign of bad piston rings is piston slapping. If you hear piston slapping noise across the inner cylinder walls, then the piston rings are worn out and the gap between the piston and the cylinder walls have widened out.
Reasons for Cylinder Liner Wear and Ways to Measure it
All types of ship machines and parts get worn out due to continuous usage and working. Proper maintenance and routine checks are necessary to ensure that the machines work for a longer time. In this article, we will have a look at various reasons that lead to cylinder liner wear and how it can be minimised.
Reasons for Cylinder Liner Wear
The wear in the cylinder liner is mainly because of following reasons:-
1) Due to friction.
2) Due to corrosion.
4) Scuffing or Adhesion
Whenever two surfaces slide over each other, friction is produced which leads to wearing down of both the surfaces. In liner wear, the surfaces are piston rings sliding over the cylinder liner. The frictional wear depends upon various factors like speed of movement between the surfaces, material involved, temperature, the load on engine, pressure, maintenance, lubrication, and combustion efficiency.
The cylinder liner wear due to corrosion is caused due to these reasons:
– Burning of heavy fuel oil in the combustion space:
This happens because heavy fuel oil contains high sulfur content. During combustion, acids are formed inside the space which should be neutralised by cylinder oil which is alkaline in nature. The production of acids will be more if sulfur content is more, leading to the formation of sulphuric acid. Sulphuric acid is formed due to absorption of the condensate or moisture present inside the combustion space.
– Lower combustion chamber temperature because of reduced service load:
As the low load operation of the marine engine is gaining popularity, it also leads to low temperature in the combustion chamber. If the cylinder oil quantity is not matched properly with the load, it may lead to corrosion of liner.
Sulphuric acid corrosion is found more in the lower part of the liner as the temperature of jacket water is very low. Corrosion due to sulfur will be high due to the presence of water in fuel and condensate in the air. This wear is generally seen between the quills. The wear near the quills enlarges and gives a characteristic of the clover leaf shape to the wear pattern. This phenomenon is called clover leafing.
How the piston works
When the engine is running, the piston moves up and down in the cylinder. When the piston reaches the turning point, it slows down and then accelerates again suddenly. This produces inertia forces that act on the piston. When considered together with the forces generated by the gas pressure, this forms the piston force, which is transferred to the connecting rod and crankshaft. Connecting rods are only perfectly vertical at the upper and lower turning points. The angle of the connecting rod presses the piston against the side of the cylinder wall. The amount and direction of this force constantly change during the combustion cycle, as they depend on the piston force and the angle between the piston crown and connecting rod axis. Pistons are equipped with piston rings. They seal the combustion and working chamber in relation to the crankcase. They also remove the oil from the cylinder walls, thus controlling the oil consumption. Piston rings also discharge the heat absorbed by the piston during combustion to the cooled running surface of the cylinder liner.