Even looking on the internet can lead to confusion, as many websites have mistakenly misidentified the real differences between them. February 6, 2013. Piping QC - Inspectors Questions and Answers. Basic Difference is the how their are measured.. For over 35 years, Eagle Stainless has earned a reputation as a world-class tubing components and parts supplier, proudly serving industrial, energy, medical, and aerospace industries across the globe. This is an important question to be asked in the interview, which every technician needs to know. Question no 9.Cold spring and cold pull are same. and wall thickness) only two may be specified with tolerances and the third is theoretical. They are specified by Nominal Pipe Size (NPS) and Schedule (wall thickness). Kind request to Readers to list other questions that you might have faced/ received in some interviews in the comments section to help fellow colleagues. Both pipe and tube imply A level of rigidity and permanence, whereas a hose is typically portable and versatile. (The application cost of labor-intensive coatings such as painting has risen far more than the cost of factory operations such as galvanizing.). The outside diameter is important since it will indicate how much it can hold as a stability factor. Pipes are produced on large scale (high yield tons / hour) according to highly productive processes. Visit my website hardhatengineer.com for free study materials and dont forget to subscribe to my channel to get regular updates on new videos and also like and share my video with your friends. In this video, you will learn about the most common questions regarding pipe fittings material standards that you may face during the interview. With the exception of copper and brass, tubes can be shaped with some effort. they have different diameter.. so it can impact their flow.. Hi, very useful & detail difference has given between tube & pipe. Some of them are also used for the design of the components. Now, remember that this % of carbon will affect the strength and ductility of the material. Tubulars undergo several dimensional quality checks, such as straightness, roundness, wall thickness, surface, during the manufacturing process. +/- 0.04"). On the other hand, a tube can be measured based on the outer diameter. Tubes perform better in applications that require durability and strength. Whereas pipes are normally used to transport gasses or liquids making it important to know the capacity. OD minus 2 times WT (SCHEDULE) determine the inside diameter (ID) of a pipe, which determines the liquid capacity of the pipe. 1. This is also popular by names Radio Frequency Welding, RF Welding, or HF Welding Process. What is a Fired Equipment? Through this platform, I will share my experiences and knowledge with you in an innovative way. Mechanical strength is a major concern for tubes. Pipe fittings are classified based on end connection as: , Based on the type of construction, gaskets are classified as: . Tubing is usually held to tighter and more stringent tolerances and specifications than pipe. A question such as which material grade of pipe, fittings, or flanged you have worked. What Is The Difference Between Pipe and Tube? Tubes are typically ordered to outside diameter and wall thickness; however, it may also be ordered as OD & ID or ID and Wall Thickness. However, tubes of different other shapes like square, rectangular, etc. For the best experience on our site, be sure to turn on Javascript in your browser. Entry posted by For tubing, the wall thickness is measured also with a gage nomenclature. Pipe size: A pipe's measurements . The outside diameter of tubes is numerically equal to the corresponding size. Pipes accommodate larger applications. This website is my first venture into the world of blogging with the aim of connecting with other piping engineers around the world. Pipes are used for transporting fluids and gases in Chemical, Petrochemical, Power Plants, Refineries, Storage units, Compressed air systems, Plumbing systems, etc. _(4.5)? Joining pipes is more labor intensive as it requires flanges, welding, threading, etc. There are a few key characteristics that separate tube from pipe: Pipe is always round. Tubes are used for mechanical applications (Heat Exchanger, Fired heater, Boiler, etc. Required fields are marked *. The other difference between pipe and tube is the critical dimension used to describe the pipe size or the tube size. 26. 40, Sch. Due to this fundamental difference, we generally call pipes and tubes as: water pipes, steam pipes, slurry pipes, boiler tubes, heat exchanger tubes, radiator tubes, etc. If this is not possible, it should not be less than 1". if piping is more Pipe rack is required. Welcome to my space, I am Anup Kumar Dey, an experienced piping engineer for the last 19 years. tubes are used for thermal applications like heat exchangerswhilepipes are used for transporting purposes;moving fluids from one place to another. Smaller gauge numbers indicate larger outside diameters. Pipe Thickness Calculation of Straight Pipe under External Pressure/ Vacuum Pressure Condition. What is High-Frequency Welding? People use the words pipe and tube interchangeably, and they think that both are the same. It can only be connected with elbow/couplers to change the orientation. Piping Stress Man hour estimation (Detailed engineering) process for a specific Project, Pressure Tests of Piping systems-Hydrotest Vs Pneumatic Test, Importance of Bourdon Effect, True and Effective Axial Force, Trunnion Checking or Dummy Checking during stress analysis of a piping system, Pressure Relief Valve: Definition, Types, Working, Location, Sizing, Codes and Standards (PDF), Static Analysis of Slug flow: A Presentation for Beginners, Functions of Gaskets for leak-proof Flanged joints, Applicability of Caesar II for stress analysis of lines having D/t ratio more than 100, Air Cooler Piping Stress Analysis using Caesar II [With PDF], Turbine Piping: Definition, Working Philosophy, Layout Consideration, Stress Analysis, NEMA SM 23, Tank Settlement for Piping Stress Analysis, An article on Tank Bulging effect or bulging effect of tank shells, Few Changes in the 2018 Edition of ASME B 31.3 2018 with respect to 2016 edition, logy for Rotary Equipment using Caesar II, Stress Analysis of PSV connected Piping Systems Using Caesar II, Flange Leakage Evaluation based on NC 3658.3 Method method using Caesar II, What is Flow-Induced Vibration (FIV) in a Piping System. Ans:Piping Stress Man hour estimation (Detailed engineering) process for a specific Project, Ans: Pressure Tests of Piping systems-Hydrotest Vs Pneumatic Test, Ans: Importance of Bourdon Effect, True and Effective Axial Force, Ans:Trunnion Checking or Dummy Checking during stress analysis of a piping system, Ans: Pressure Relief Valve: Definition, Types, Working, Location, Sizing, Codes and Standards (PDF), Ans:Static Analysis of Slug flow: A Presentation for Beginners, Ans: Functions of Gaskets for leak-proof Flanged joints, Ans:Applicability of Caesar II for stress analysis of lines having D/t ratio more than 100, Ans: Air Cooler Piping Stress Analysis using Caesar II [With PDF], Ans: Turbine Piping: Definition, Working Philosophy, Layout Consideration, Stress Analysis, NEMA SM 23, Ans:Tank Settlement for Piping Stress Analysis;An article on Tank Bulging effect or bulging effect of tank shells, Ans:Few Changes in the 2018 Edition of ASME B 31.3 2018 with respect to 2016 edition, Ans:Alignment Check Methodology for Rotary Equipment using Caesar II, Ans: Stress Analysis of PSV connected Piping Systems Using Caesar II, Ans:Static Method of Seismic Analysis of Piping System using Caesar II;Static Method of Wind Analysis of Piping systems in Caesar II using Pressure Vs elevation Method, Ans:Stress Analysis of Vertical Reboiler Piping using Caesar II, Ans:Flange Leakage Evaluation based on NC 3658.3 Method method using Caesar II, Ans: What is Flow-Induced Vibration (FIV) in a Piping System. Differences between Pipe and Tube From a layman's viewpoint, Both Pipe and Tube seem to be the same as they have many similarities like both are hollow, usually made from metals, can transfer fluids, etc. ), for instrumentation systems (used for measuring instruments); for structural applications, etc and could be rigid or flexible. Here I will show you the list of carbon steel, alloy steel, stainless steel, and nickel steel grades. Carbon Steel :- ASTM A181, ASTM A105, ASTM A350 LF1/2. Currently, I work in a reputed MNC as a Senior Piping Stress Engineer. Pipe are typically available in large sizes then tubes All pipes are tubes. Tubing is typically ordered to outside diameter and wall thickness; however, it may also be ordered as OD & ID or ID and Wall Thickness. 56 Pipefitter Interview Questions (With Sample Answers) Indeed Editorial Team Updated September 30, 2022 The job of a pipefitter requires you to have knowledge and experience related to installation, testing, repair and maintenance of piping systems. A narrower range for tubing (up to 5 inches), larger for steel tubes for mechanical applications. Tubing is generally used in applications where smaller diameters are required. Ans: What does a Pipe Stress Engineer need to know? JavaScript seems to be disabled in your browser. FRP / GRP Pipes manufactured by filament winding method utilize continuous glass strand roving impregnated with polyester resin and helically wound on rotating mandrel at a specified winding angle. 2. For structural use, tubes are available in custom sizes. The strength of a tube depends on the wall thickness. The answer to that question is yes! Pipe is typically ordered using the Nominal Pipe Size (NPS) standard and by specifying a nominal diameter (pipe size) and schedule number (wall thickness). After all, how different can hollow cylinders get, and who really cares enough to go and look? Pipe is a hollow section with round cross section for the conveyance of products. Proudly powered by WordPress | Theme: News Way by Themeansar. Generallythe outer and inside surfaces of the tubes must be smooth. In the next video, I will explain to you the flange-related questions. Pipe Wall thickness is expressed in schedule numbers that can be converted into mm or inches. Installing Handrail, Railing & Misc. Pipesare always round, whereastubes can be square, rectangular or round. Pipe class is developed considering Operating Pressure, temperature, and corrosive environment. Your email address will not be published. pipe mills produce on a continuous basis and feed distributors stock around the world. 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. The stated OD and measured OD are generally within very close tolerances of each other. A tube is often assumed to be a pipe; however, this is incorrect. If you want to request a video, please write in the comment. This example shows the difference between a 1-1/2 pipe flange and a 1-1/2 tube flange. 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. The minimum spacing of circumferential welds between centerlines shall not be less than four times . The fundamental difference between pipe and tube is: Pipe is for mass transfer applications, whereas, tube is for heat transfer applications. Operating Environment and the Performance of Stainless Steel, Three Days of Innovation, Education and Connection. 1.tubes is used to the heat and mass transfer, tubes and pipes both are use as required (application). Design Considerations for Steam Piping System (PDF). The minimum distance between these two joints should be the one-time diameter of the pipe. Tubes are most often specified by the OD and wall thickness. The inside diameter (ID) is theoretical.