Seamless Pipe, Welded Pipe, ERW Pipe, Mild Steel
What is the meaning, difference between a Seamless Pipe, Welded Pipe, ERW Pipe, Mild Steel Pipe, Seam Pipe?
eamless Steel Pipe is made from a solid round steel ‘billet’ which is heated and pushed or pulled over a form until the steel is shaped into a hollow tube. Billets are procured both from indigenous suppliers and from abroad. Major Indigenous suppliers are JSPL, JSW, Kalyani and steel round billets are imported from renowned mills from Europe, Far East countries, Canada, China. Seamless Pipe is formed by forcing molten metal through a round die with a plug in the center to form a long tube of continuous metal which is then cut into appropriate lengths; usually either 21 ft or 40 ft. although other lengths are available. Seamless Pipe is more uniform in consistency unlike Rolled and Welded Pipe that has been seam welded. Seamless Pipe can also, usually, withstand higher operating pressures and temperatures than Weld Pipe so it is commonly preferred for use in high pressure systems. Fluid flow through Seamless pipe is generally less turbulent than Welded pipe also.Benefits of Seamless Steel Pipe
* Increased Pressure Ratings * Uniformity of Shape * Strength Under Loads Advantage of seamless steel pipes is their increased ability to withstand pressure. The weakest point in a welded steel pipe is the welded seam. But because a seamless steel pipe has not been welded, it doesn’t have that seam, making it equally strong around the entire circumference of the pipe. It is also much easier to determine pressure calculations without being required to take weld quality into consideration. Although seamless pipe can sometimes be more expensive than welded pipe, this increased ability to withstand pressure allows you to use pipes that are thinner and lighter, which can help cut down on expenses; Because welded seam pipe is wrapped around another form before it is welded, and because welding adds heat, stress and other extraneous variables to the forming process, it can never be as round as seamless steel pipe. Seamless steel pipe is a continuous extrusion of the alloy, meaning that it will have a round cross section that you can count on, which is helpful when you’re installing pipes or adding fittings. Seamless steel pipe can sometimes be more expensive than other forms of steel pipe, but it’s also more reliable. This is because it has greater strength under loading. Empty pipe must always support its own weight, but when a pipe is filled with material–or under load–it must also support that weight as well. Pipe failures and leaks in welded pipes usually occur at the welded seam. But because seamless pipe doesn’t have that seam, it isn’t subject to those failures. These benefits make seamless steel pipes the preferred material in an array of commercial pipe applications, including ship building, pipelines, oil rigs, oil field equipment, pressure vessels, machinery parts and offshore rigs. An additional benefit of seamless pipes is that they perform well in harsh conditions, which means that they can be used in extremely cold or hot environments.Seamless Pipe, Welded Pipe, ERW Pipe, Mild Steel Pipe, Seam Pipe:
by Hrihaan-
Seam pipes are made by seam or electric resistant welding process i.e sheet of steel is rolled in a shape of pipe and its sides are welded through electric resistance welding. Seam pipe don't have good outer diameter finish as there is thin line of welding on it.
MS pipe. MS Pipe refers to Mild Steel Pipe and MS Tube refers to Mild Steel Tubes.
Mild Steel (MS) pipes are manufactured using low carbon (less than 0.25%) steel. Due to low carbon content the pipes do not harden and are easy to use. As MS Pipes are made from mild steel they can easily be welded and formed in various shapes and sizes for pipelining and tubing purposes. These are generally used for drinking water supply i.e. Plumbing, Firefighting, HVAC but can also be used in various other Industrial and Engineering applications. These pipes are usually coated with other metals/paints/varnish etc to prevent it from rusting but extra care should be taken to prevent it under extreme conditions. The raw material of MS Pipes i.e. MS Steel Coils has been procured from trusted Steel manufacturer i.e. Steel Authority of India (SAIL), which is a public sector company and is the largest integrated iron and steel producer in India.
* Steel is less malleable and harder than mild steel * Mild steel s less brittle than steel * Steel is more resistant to corrosion * Mild steel can be further strengthened through the addition of carbon * The basic difference is that s/s has very little carbon and is alloyed with chromium, nickel, molybdenum and other elements to improve its mechanical and chemical properties
ERW Pipe. ERW pipe means Electric Resistance Welding pipe is manufactured by rolling metal and then welding it longitudinally across its length. The heat developed causes the sheets to fuse together. The joint efficiency factor 'E' is 0.85. Used for category D fluids. ERW pipes are manufactured when the sheet metal is overlapped; and a bias is applied to develop resistance between the sheets. Seamless pipe is manufactured by extruding the metal to the desired length; therefore ERW pipe have a welded joint in its cross-section. While seamless pipe does not have any joint in its cross-section through-out its length. In Seamless pipe, there are no welding or joints and is manufactured from solid round billets. The seamless pipe is finished to dimensional and wall thickness specifications in sizes from 1/8 inch to 26 inch OD. Applicable in for High-pressure applications such as Hydrocarbon Industries and Refineries, Oil and Gas Exploration and Drilling, Oil and Gas Transportation and Air and Hydraulic cylinders, Bearings, Boilers, Automobiles etc