Difference between Primary loads and Secondary loads in a Piping System, Slug Flow Analysis Using Dynamic Spectrum Method in Caesar II, Basics for Stress Analysis of Underground Piping using Caesar II. When it comes to measurement of pipe, it is measure by the inside diameter, often called the nominal diameter. To answer this question, you should know some of the most frequently used material grades in piping. Tubes are used for mechanical applications (Heat Exchanger, Fired heater, Boiler, etc. The thickness of a tube is defined by a gauge number. So keep on checking my youtube channel for a new videos. Pipes are always rigid and resistant to bending. and wall thickness) only two may be specified with tolerances and the third is theoretical. Pipe is normally of a heavier wall thickness. From the size 14 and onwards NB = OD of pipe. Regardless of the wall thickness the nominal OD of a pipe will not change. Slip - on:- The Slip-on type flanges a re attached by welding inside as well as outside. (Using Butt welding). Refer the following post: http://processpiping.blogspot.com/2013/08/InfoASMEB31.3.html. Pipe is specified by inner dia however tube is specified by outer dia. Pipes are available in the small bore as well as the big bore. Such as above defined, the inside diameter is determined by the oudside diameter (OD) and wall thickness (WT). fluidand gas transfer in different industrial. The products include fluids, gas, pellets, powders and more. Outside diameter of tubes is numerically equal to the corresponding size. Tube wall thickness is expressed in millimeter, or inches, or BWG (Birmingham wire gauge.) However, stainless steel, aluminum, and steel tubing all have measured and stated ODs that are exact or within a specified tolerance, usually in the thousandths of an inch (e.g. Un-plasticized poly (vinyl chloride) (uPVC)(Polyvinyl chloride) uPVC, also known as rigid PVC, is extensively used in the building industry as a low-maintenance material. Pipe is the word used for round tube only. 2020 The Wagner Companies, R&B Wagner, Inc. All Rights Reserved. After all, how different can hollow cylinders get, and who really cares enough to go and look? XS, Sch. link to What is Steam Piping? Alloy Steel :- ASTM A234 WP1/WP5/WP7/WP9/WP11/WP12/WP22. Our products are exported to over 70 countries across the world, while in India we have supplies to even the remote areas. The long and short is that the NPS was defined so you would know approximately what ID you were working with and could count on the OD never changing. Contact us: 8am - 5pm CST (877) 887-9523. For more information contact us. Ans: Double Block and Bleed Valve: Introduction, Working, Benefits, Applications, Ans: Pipe Expansion Joint Details: Components, Types, Materials, Manufacturers, Ans: Hot Sustained Stress (Lift-Off) Checking in Caesar II, Ans: Stress Analysis of Vertical Reboiler Piping using Caesar II. A pipe is Specified by Nominal Pipe Size (NPS) or Nominal Bore (NB). For example, a 2-inch nominal steel pipeconsists of a family of steel pipe with a 2.375 diameter. Pipes are categorized as tubular vessels used in pipeline and piping systems, and commonly transport gases and fluids. Even in cases where the initial cost of galvanizing is higher than alternative coatings, galvanizing is almost invariably cheapest in the long term (because it lasts longer and needs less maintenance). they have diff thickness How to decide how many load bearing clip supports to be used?, Hello;Hoy I can get al the questiins and answers?Best regardsRicardo flores, Your email address will not be published. The products include fluids, gas, pellets, powders and more. OD minus 2 times WT (SCHEDULE) determine the inside diameter (ID) of a pipe, which determines the liquid capacity of the pipe. This extra heat transfer surface area is useful when there is a fluid with low ' heat transfer coefficient ' or 'temperature difference (T)' on the outside of the tube. Mechanical Interview Questions 4 contains questions about Piston Ring, Power plant, Hydrostatic system, Ductile-Brittle Transition Temperature in metals, Hydrodynamic Cavitation, Powder Technology, Stress Strain curve for Steel, difference between Pipe and Tube, Welding damage Eye sight, BCC, FCC, CPH. Toughest coating. Pipe is identified by NB and thickness is defined by Schedule whereas Tube is identified by OD & its thickness as BWG (Birmingham wire gauge or 1/100 inch). Pasted as rich text. To address this issue standard has defined pipe lengths in single random and double random categories. they have different diameter.. so it can impact their flow.. Tubes are used for both HEAT&MASS Transfer. For tubes,the difference between the outside diameter and the wall thickness, multiplied by two, definesthe inside diameter of the tube. Pipe Wall thickness is expressed in schedule numbers that can be converted into mm or inches. You can answer this question 2. Pipes are always round, whereas tubes can be square, rectangular or round. I am Varun Patel. It is generally used for structural purpose, the OD is important and exact number. The other difference between pipe and tube is the critical dimension used to describe the pipe size or the tube size. The thumb rule is that the minimum distance between adjacent butt welds is 1D. Design Considerations for Steam Piping System (PDF). These two words are commonly mistaken as the same thing. Tubes are available with coupling ends, irregular ends, special screw thread, etc. Tubes are often put into applications such as medical devices that require precise outside diameters. Through this platform, I will share my experiences and knowledge with you in an innovative way. Well, since I'm a know-it-all, let me explain as best I can what exactly differentiates tube and pipe. What will be the position of Piston Ring? In ERW pipes and tubes there are three classes: SS 304 contains 18% chromium and 8% nickel while SS 316 contains 16% chromium, 10% nickel and 2% molybdenum. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'whatispiping_com-banner-2','ezslot_5',851,'0','0'])};__ez_fad_position('div-gpt-ad-whatispiping_com-banner-2-0');report this ad, Top 180+ Piping Interview Questions with Answers. Pipes are available as the small bore and the big bore. Tubing is generally used where small diameters are required. Why Mechanical Engineers are Mostly Preferred in HVAC Industry? The term nominal refers to pipe in non-specific terms and identifies the inside diameter with a non-dimensional number. Tubing size is specified by OD and WT (wall thickness). The winding process is continuous in bi-directional layers until the desired wall thickness is achieved. Currently, I work in a reputed MNC as a Senior Piping Stress Engineer. In this video, you will learn about the most common questions regarding pipe fittings material standards that you may face during the interview. Save my name and email in this browser for the next time I comment. Can anyone Explain the answer for Question 4) Can you make a typical Sketch & supporting for column piping? During production, pipes are not manufactured in the same lengths, and during the construction of the process plant, you required various lengths of pipes. Different material specifications are segregated in separate Piping Class. 1. Tubes are typically ordered to outside diameter and wall thickness; however, it may also be ordered as OD & ID or ID and Wall Thickness. Tubes are stronger than pipe. Your previous content has been restored. Technical solution / TecSolution 3.3Welcome by TecSolution 3.3 . Ans: https://whatispiping.com/dynamic-restraints, Ans: https://whatispiping.com/?s=cold+pull, Ans: Stress Analysis of Pump Piping (Centrifugal) System using Caesar II, Ans:https://whatispiping.com/asme-b-31-3, Ans:https://whatispiping.com/wrc-107-and-wrc-297, Ans: https://whatispiping.com/control-valves/#Control_Valve_Assembly, Ans:https://whatispiping.com/pipe-support-span, Ans:https://whatispiping.com/co-efficient-of-friction, Ans:Modeling of Sway Braces in Caesar II for stress analysis, Ans:Use of Sway Brace, Strut and Snubber for pipe supporting, Ans:Piping Elbow or Bend SIF (Stress Intensification Factor), Ans: Difference between ASME B 31.3 and B 31.1 (B31.3 vs B31.1). tube tube vs pipe You have probably heard the terms pipe and tube used interchangeably, and there's a good chance you aren't exactly sure what the difference is between them. This is an important question to be asked in the interview, which every technician needs to know. Tubing also has a tighter manufacturing tolerances than pipe. Pipesare always round, whereastubes can be square, rectangular or round. The store will not work correctly in the case when cookies are disabled. Tube has no joint down the length. Pipes are used for transporting gasses or liquids making it important to know the capacity. The thickness of tubes is dependent on the use thickness is decided. In simpler terms, pipe cannot be bent. CPVC(Chlorinated polyvinyl chloride) Chlorinated polyvinyl chloride(CPVC) is athermoplasticproduced by chlorination ofpolyvinyl chloride(PVC)resinwhich is significantly more flexible and can withstand higher temperatures than standard PVC. If this is not possible, it should not be less than 1". It is measured by outside diameter and wall thickness. If not, it is never closer than 1-1/2. 1-1/2 pipe size flanges have an opening to fit over 1.90 OD the actual outside diameter of 1-1/2 pipe. Your email address will not be published. Supports of copper piping are as follows: Long radius elbows are used for small pressure drops whereas short radius elbow is used for high-pressure drops. link to What is High-Frequency Welding? 25. The terms Pipe and Tube are almost interchangeable, although minor differences exist generally, a tube has tighter engineering requirements than a pipe. Interview question for Graduate Engineer Trainee (GET).What is the difference between Tube and Pipe. This will helpful for beginners. An interviewer will ask this question to check your fundamentals. February 6, 2013. saurabhjain Tube is typically ordered outside diameter and wall thickness. Carbon Steel :- ASTM A234Gr.WPA/B, ASTM A420 Gr.WPL6. Pipes are generally made to stock with highly automated and efficient processes, i.e. In some instances the terms may be used interchangeably, however there is one key difference between tube and pipe, particularly in how the material is ordered and toleranced. Pipes accommodate larger applications. Ans: What does a Pipe Stress Engineer need to know? Ans: MITER BEND: How to Calculate Length, Angle of Cut, Weight, and Cut-back of the Miters? Generallythe outer and inside surfaces of the tubes must be smooth. Tubes are most stronger than pipes. The difference between Gr A, B &C indicates different % of carbon. Delivery time is longer. The inner and Outer surface of the pipe is rough in comparison to the tube, Tubes are manufactured on both the inner and outer surfaces as smooth, The Thickness of the pipe is decided as per governing codes like. Chilled water PUF gutty or wooden block above that u clamp, threaded rod hangs to structure by a circular clamp. You cannot paste images directly. Pipe will always be round however tube can be round, square or rectangular. The manufacturing of Nominal Pipe Sizes from 1/8 to 12 is based on a standardized nominal outside diameter (OD) that is different from the measured OD. 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Tube, on the other hand, is extruded through a die. And once again thanks for your efforts and pls keep it. The molybdenum is added to help resist corrosion to chlorides. 4. Pipe wall thickness is expressed in schedule number (most common are Sch 40, Sch STD., Sch. I am running my own business in mechanical fabricaion. Lets look at some of the most common material grades used for manufacturing the piping components. Stainless Steel :- ASTM A182F6/F304/F304L/F304H/F310/F316/F316L /F316H/F321/F321H/F347/F347H/F348. 2. Delivery time for pipes can be short compared to tube which is generally longer. You can like the best answer 3. The standardized OD was originally defined so that a pipe with a standardized OD and wall thickness typical of the period when it was established, would have a pipe ID that was approximately equal to the nominal size of the pipe. For catalyst, flows very long radius elbows are used. Now, remember that this % of carbon will affect the strength and ductility of the material. Tubing is typically ordered to outside diameter and wall thickness; however, it may also be ordered as OD & ID or ID and Wall Thickness. Ans:Why is Aveva PDMS better than Intergraph PDS? Strength is not the major concern. 11 most important questions & answers from ASME B 31.3 which a Piping stress engineer must know. Many a time, these terms are used interchangeably. 24. Pipe class is developed considering Operating Pressure, temperature, and corrosive environment. The short answer is: A PIPE is a round tubular to distribute fluids and gases, designated by a nominal pipe size (NPS or DN) that represents a rough indication of the pipe conveyance capacity; a TUBE is a round, rectangular, squared or oval hollow section measured by outside diameter ("OD") and wall thickness ("WT"), expressed in inches or milli.