There is high chromium content in stainless steel which acts as a protective layer against corrosion and rust. Whereas carbon steel has a high carbon content that when exposed to moisture can corrode and rust quickly.
There are the same basic ingredients of iron and carbon both in carbon steel and stainless steel. However, their main difference is alloy content. Carbon steel has under 10.5% alloy content, whereas stainless steel must contain 10.5% chromium or more than this.
A pipe is hollow with a round cross-section made for the conveyance of products such as fluid, gas, pellets, powders, etc. whereas a tube is a round, rectangular, squared, cylindrical, or oval hollow section measured by the outside diameter (OD) and wall thickness (WT), expressed in inches or millimeters. Thus all pipes can be a tube but all tubes cannot be a pipe. Pipes are used for the transference of fluids or gas mainly but tubes are generally used in structural applications.
When compared between the two then the tube is stronger than the pipe. This is why tubes are used in structural applications.
Steel tubes are mainly used in domestic and industrial settings and works. In domestic works and settings, steel tubes are generally used in appliances and gas pipes. Whereas in industry, steel tubes are used for their strength and ability to withstand extremes of pressure, temperature, and destructive factors.
Steel tubes are used primarily for structural purposes in industries and domestic appliances. While steel pipes are used as vessels for moving fluids or gases from one place to another. Thus, there is more application of steel tubes than steel pipes.
Seamless pipe is extruded and drawn from a billet whereas welded pipe is made from a strip that is roll formed and welded to produce a pipe. And the welded pipe is considerably less costly than the seamless pipe and is readily available in long continuous lengths.
Seamless steel pipe (SMLS) is produced by drawing a solid billet over a piercing rod to create the hollow shell, without welding or seam. Thus, there is no joint in its cross-section through-out its length in the seamless pipe. The most important advantage of the seamless pipe is its increasing ability to withstand higher pressure.
A welded steel pipe is manufactured by the electric resistance welded (ERW) process. It does not have a weld seam inside or outside as the seam has been taken out during the manufacturing process.
ERW stands for Electric Resistance Welded and it is manufactured by cold-forming a flat steel strip into a rounded tube and passing it through a series of forming rollers to obtain a longitudinal seam. These two edges of the longitudinal seam are then simultaneously heated with a high-frequency current and squeezed together to form a bond. The process of seam welding is usually used during the making of round, square, and rectangular steel tubes.
Welded pipe is also called ERW i.e. Electric Resistance Welded pipe. The most common specification for welded steel pipe is A53.
The most common type of standard pipe used nowadays is stainless steel pipe and carbon steel pipe. They are part of tubular products, which are manufactured to different specifications and standards. Pipes are specified as nominal pipe size in specification from 1/8" to 72". The other two most common types of pipes used are welded pipe and seamless pipe and both are made of carbon steel and stainless steel.
A106B is the most common specification of seamless carbon steel pipe. The seamless pipe is manufactured by a process in which there is no welding requirement.
The ERW pipe is generally used for low or medium-pressure applications, mainly in the transportation of water or oil. ERW pipe is manufactured from a ribbon of steel pulled through a series of rollers and formed into a tube after fusing through a charge.
The seamless or without joint steel pipe has better pressure capacity and strength in comparison to ERW welded steel pipe. This is the reason why seamless steel pipe is widely used in high equipment, thermal, and boiler industries.
Yes, there is a seam or welded joint in its cross-section of ERW steel pipe, whereas seamless steel pipe does not have any seam or welded joint in its cross-section through-out its length.
ERW stands for Electric Resistance Welded in steel pipe.
The ERW steel pipe is formed by cold forming a flat steel strip into a rounded tube after spending it through a series of forming rollers to get a longitudinal seam. The two edges of the steel pipe are then heated with a high-frequency current and squeezed together to make a bond.
Water piping of various sizes shall be MS, Class-B, and conforming to IS-1239 Part- 1, BIS:1239 & Pipe Ends shall be suitable for fittings having IS 1239, Part-2. No jointer is permitted in pipe and fittings. Inside diameter shall not vary quite 0.8 mm.
EFW stands for electric fusion welding process in manufacturing steel pipes. It is a process in which metal is heated by one or several consumable electrodes and a work-piece to heat the metal, and then the arc is used to make the metal and fill. While the ERW pipe manufacturing process includes low, medium, and high-frequency welding processes.
Yes, the seamless pipe is stronger than welded steel pipe. Because the seamless steel pipe has better pressure capacity, and its strength is above ERW welded steel pipe. Therefore seamless pipe is widely used in high equipment, thermal, and boiler industries.
SAW stands for submerged arc welded (SAW) in the pipe. And there are two SAW pipes including LSAW and SSAW. Here, SSAW has a spiral weld seam while LSAW has a longitudinal weld seam.
MS is the full form of Mild Steel (MS). MS steel pipes are made using low carbon i.e. less than 0.25% of steel. Because of the low carbon content in it, the MS pipes do not harden and are easy to use. And they can easily be welded and formed in various shapes and sizes for different pipelines and tube purposes.
GI is the full form of Galvanized Iron in the pipe. However, the material MS i.e. Mild Steel is a low-carbon steel content pipe. The galvanized iron steel pipe is hot-dipped. And MS pipe is a low-carbon steel pipe having the content of less than 0.25% steel due to its low strength, low hardness, and softness.
There are different stencils on the surface of the pipe that indicate S for seamless pipe, F for furnace pipe, and E for electrical resistant welded (ERW) pipes.
Seamless pipe is manufactured using a process that heats and molds a solid billet into a cylindrical shape then rolls it until it's stretched and hollowed. A bullet-shaped piercer point is pushed through the center of the billet because the hollowed center is irregularly shaped.
HFW stands for high-frequency welding. It is a solid resistance heat energy generally used to manufacture pipes with welded longitudinal seams or spiral seams. The welded steel pipe is welded by high-frequency welding (HFW) technology which is generally used for the transportation of pressurized fluids like water, oil, and natural gas.
No, all pipes don’t have seam i.e. joint. There are welded steel pipes made up of welding a plate rolled into a tubular shape by a seam or a spiral seam i.e. a joint.
A seamless tube is manufactured and drawn from a billet whereas a welded tube is made from a strip i.e. roll formed. A seamless tube is without a joint while welded tube has a joint throughout its length. And so seamless tube is more costly than a welded tube.
A class pipe is a labeling system of different types of pipes used for different purposes without considering diameter. The class label of pipe rates the internal pressure that the pipe can take for the different loads. For example, a “class 200″ pipe can take 200 psi, irrespective of what the diameter of the pipe is. If it is 10″, it also takes 200 psi.
Pipe Schedule is also marked as SCH. It is a standard used for the measurement of the nominal wall thickness of a pipe. The pipe schedule number is non-dimensional and depends on the nominal size of the pipe, internal pipe working pressure, and the material used for the pipe wall.
The schedule number of a pipe is calculated approximately based on a formula like: Schedule = 1000 x (P/S) Here P is the internal service pressure of the pipe and S is the ultimate tensile strength of the pipe material. The schedule numbers of a pipe can be marked as Standard (STD), Extra Strong (XS), and Double Extra Strong (XXS).
The class C pipe is lightweight, durable, and is rated for 9 bar pressure at +20°C.
In technical terms, Drawn Over Mandrel (DOM) is not a type of steel tube, but it is instead the process in which the tube is finished. It is marked as a high-quality tube, generally made from SAE 1020 or 1026 steel. It is the same at the first stages of processing as ones used to make electric resistance welded (ERW) tube, while in the finishing stages the entire weld is removed and the tube is cold drawn over a mandrel. The cold-drawn process gives the tube with improved surface finish, better dimensional tolerances, and the strongest weld strength. That’s why DOM is often incorrectly marked as seamless tube however it does have a seam that is not visible.
There is no much difference in the strength of the DOM tube and ERW tube. However, DOM tube is generally costlier than ERW tube and is considered as a premium product compared to ERW by some fabricators due to its finishing.
There are various standard conversion factors used for load calculation of MS steel tubes like:
For MS square tube—
Weight (kgs) = Width X Width X 0.00000785 X Length
For MS round tube—
WEIGHT (kgs) = 3.14 X 0.00000785 X ((Diameter / 2)X( Diameter / 2)) X Length.
Galvanized iron (GI) is cheaper due to its weak strength as compared to stainless steel. Stainless steel has roast-free and also, has high strength so it is dear. Therefore, stainless steel is used for big-budget projects which require many thick components.
The Pipe Class is a document that specifies the sort of the components such as kind of pipe, material, schedule, flange ratings, valve types, branch types, and valve trim material, gasket, and every one the opposite components specific requirements to be used for various fluids under different operating.
Schedule 40 indicates the wall thickness of the pipes. There is an immediate correlation between the dimensions of the pipe and therefore the wall thickness required for various uses, and codes specify usage of pipes consistent with their schedule.
There are several types and sizes of pipes manufactured for different purposes. They are made by using different materials and so available in the form of metallic pipes, cement pipes, and plastic pipes. Metallic pipes include steel pipes, galvanized iron pipes, and forged iron pipes. Cement pipes are divided into concrete cement pipes and asbestos cement pipes.
PVC pipes are preferred over GI pipes. Because PVC pipes are durable as compared to GI pipes. This is because GI pipes aren't corrosion resistant and they eventually rust. PVC pipes are corrosion-resistant pipes. Compatible to hot & cold water – PVC pipes are not affected by warm water unlike GI pipes
SS steel is better than MS steel. The basic difference between the two is that SS steel has little or no carbon and is alloyed with chromium, nickel, molybdenum, and other elements to enhance its mechanical and chemical properties.
In the manufacturing process of MS pipes, raw steel is first cast into a hot billet or flat strip. Thereafter it is made into a pipe by forcing the sides of the flat steel strip together and sealing them with a weld.
The galvanized iron pipes are steel pipes that have been dipped in a protective zinc coating to prevent corrosion and rust. However, after a long duration like decades of exposure to water will cause galvanized pipes to corrode and rust on the inside. For example, the transmission tower consisting of low-carbon steel and galvanized structures buried under the soil is more likely to go under severe corrosion, and so it needs periodic replacement of the structure inside the soil.
HR stands for Hot Rolled. The hot-rolled steel pipe is roll-pressed at high temperatures over 1,700ËšF. It is above the re-crystallization temperature for most steels. This makes the steel easier to make a pipe.
CRC is a full form of Cold Rolled Coil Pipes. CRC pipes are another type of pipes. The metal used in the manufacturing of CRC pipes is cold rolled below its recrystallization temperature i.e. mostly at room temperature.
This is steel pipe for pipeline transportation systems within the petroleum and gas industries with the specification of the American Petroleum Institute.
These steel EN 10219 S275JOH Welded Tubes are effortlessly obtainable at an extremely cost-effective rate in the market.
Tubes with EN39 is the specification given by the European Standard, which have a specified outside diameter of 48.3mm and specified wall thickness of three .2mm or 4.0mm
