difference between pipe and tube interview questiondifference between pipe and tube interview question

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Discover Best Places to work in India. A pipe is Specified by Nominal Pipe Size (NPS) or Nominal Bore (NB). Tubing is usually more expensive than pipe due to tighter manufacturing tolerances. Tubes are cold rolled and hot rolled. Tube size is measured with its OD, while piping is measured differently and has its own set of standards. You can share the question Vidhan Chandra Shahi and Hilary Kipkirui Cheruiyot 2 Report Entry Anonymous on Nov 8, 2020 Interviews > Fermilab To comment on this, Sign In or Sign Up. Pipe is a hollow section with round cross section for the conveyance of products. 1. After all, how different can hollow cylinders get, and who really cares enough to go and look? 5. The thumb rule is that the minimum distance between adjacent butt welds is 1D. Pipe length is mentioned in either meter or feet. Pipes are used for transporting fluids and gases in Chemical, Petrochemical, Power Plants, Refineries, Storage units, Compressed air systems, Plumbing systems, etc. if you reference this article, please link back here, because you know, we did all the work of explaining it. Ans:Why is Aveva PDMS better than Intergraph PDS? Lets look at some of the most common material grades used for manufacturing the piping components. Pipe tolerances are set but not too restrictive. The hollow pipe is then extruded through a die and mandrel combination to reduce the outside diameter and to expand the inside diameter. As said earlier, you can visit my website hardhatengineer.com for this list. PVC(Polyvinyl chloride) Polyvinyl chloride, more correctly but unusually poly (vinyl chloride), commonly abbreviatedPVC, is the third-most widely produced syntheticplasticpolymer, afterpolyethyleneandpolypropylene. In the ERW / EFW / HFW pipe process,the first plate is formed in a cylindrical shape and the longitudinal edges of the cylinder formed are welded by flash-welding, low-frequency resistance-welding, high-frequency induction welding, or high-frequency resistance welding. From the size 14 and onwards NB = OD of pipe. Difference between Pipes and Tubes? - Mechanical Engineering Questions Tubes are stronger than pipe. High-frequency welding is a special type of welding technique used to join thermoplastic materials together. Round tubing is specified by its actual outside diameter and is equal to the corresponding size. 31. If not, it is never closer than 1-1/2. See our complete line of in-stock inventory. Currently, I work in a reputed MNC as a Senior Piping Stress Engineer. I am a Mechanical Engineer turned into a Piping Engineer. Tube size will keep the same OD no matter what the wall thickness is. Pipe is typically ordered using nominal pipe size (NPS) standard and by specifying the nominal diameter (pipe size) and schedule number (wall thickness). Your link has been automatically embedded. Carbon Steel :- ASTM A234Gr.WPA/B, ASTM A420 Gr.WPL6. Stainless Steel :- ASTM A213 TP304/TP304L/TP304H/TP310/TP316/TP316L/TP316H/ TP317/TP321/TP321H/TP347/TP347H/TP348/TP348H, ASTM A608 HK40. 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. Tubes can come in different shapes such as square, rectangular and cylindrical, whereas piping is always round. Minimum spacing of circumferential welds between centerlines shall not be less than 4 times the pipe wall thickness of 25 mm whichever is greater. What is the difference between Tube and Pipe - Glassdoor Pipe is typically ordered using the Nominal Pipe Size (NPS) standard and by specifying a nominal diameter (pipe size) and schedule number (wall thickness). 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. The strength of a tube depends on the wall thickness. Ans: Finned tube heat exchangers are characterized by the significantly increased outer tube area. 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. What are the differences between tube and pipe? Tags: Difference Between Tube and Pipe, tubing, 2023 Eagle Stainless Tube & Fabrication, Inc. All rights Reserved. Both tubes and pipes can be cut, bent, flared and fabricated check out our top 10 tips for ordering tubing and piping. Tubing is generally used where small diameters are required. You'll be amazed at what we can create together! Tubes are generally used in tracing lines, tubes for heat exchanger, fired heater and in instrument connection. Pipe: - 1. Save my name and email in this browser for the next time I comment. How to determine what you require a pipe or a tube? 40, Sch. The most common are beveled and plain ends, however for tube it is a quick connection on the site (threaded and grooved ends, couplings, etc). 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. Here is a table indicating the actual dimensions for several standard pipe sizes. The winding process is continuous in bi-directional layers until the desired wall thickness is achieved. To answer this question, you should know some of the most frequently used material grades in piping. A/B, ASTM A106 Gr. With over 250 tons of sale in stainless steel and carbon steel pipes every day, Metallica has emerged as a prominent vendor for many buyers in India and Overseas. Tubing is used in structural applications so the outside diameter becomes the important dimension. Pipe Thickness Calculation of Straight Pipe under External Pressure/ Vacuum Pressure Condition. Operating Environment and the Performance of Stainless Steel, Three Days of Innovation, Education and Connection. Tubes are often put into applications such as medical devices that require precise outside diameters. A tube is often assumed to be a pipe; however, this is incorrect. The biggest difference between tube and pipe is their shape. Installation & Assembly Instructions Resources. Tubes are used for both HEAT&MASS Transfer. Lets move to the next question. | Types of Fired Equipment for Oil and Gas Industries (PDF), Types of Pipes | Classification of Pipes (PDF), Comparison between Piping and Pipeline Engineering, Difference between Stub-in and Stub-on Piping Connection, Difference between Centrifugal and Reciprocating Compressor, Differences between Hot-dipped galvanization and Electro-galvanization, CAESAR II vs START-PROF Piping Stress Analysis Software Comparison, Pipes are always cylindrical or round in shape. For the best experience on our site, be sure to turn on Javascript in your browser. | Introduction to High-Frequency Welding Machine (PDF). link to What is Steam Piping? 2. Pipes are extensively used in all Process, Power & Utility lines to carry fluids. An interviewer will ask this question to check your fundamentals. Join us (login) to get full access :Please sign up to connect and participate. Alloy Steel :- ASTM A234 WP1/WP5/WP7/WP9/WP11/WP12/WP22. This is also popular by names Radio Frequency Welding, RF Welding, or HF Welding Process. Hi There! For example, 3 Schedule 40 NPS has an outside diameter and wall thickness that very roughly gives it an inside diameter of 3. 2020 The Wagner Companies, R&B Wagner, Inc. All Rights Reserved. Tubes are also used as primary load bearing member in steel structure for the civil application. 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. What will be the position of Piston Ring? LPD For draining water after conducting Hydro-test. 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). We are a pioneer in the stainless steel pipes, carbon steel pipes and alloy steel pipes manufacturing and processing industry. In the context of refineries or oil and gas plants, "fired equipment" refers to the equipment that is used for the combustion of fuel to generate heat or energy. Stainless steel is used for corrosive applications. A common application is the hot water from district heating plants. So keep on checking my youtube channel for a new videos. The significant difference between pipe and a tube is that a pipe can be measured based on its inner diameter. GoogleAnalytics. The terms Pipe and Tube are almost interchangeable, although minor differences exist generally, a tube has tighter engineering requirements than a pipe. 1-1/2 tubing has a true 1.50 outside diameter. People use the words pipe and tube interchangeably, and they think that both are the same. Interview Answer 1 Answer 0 Pipe is called out by its nominal diameter rather than tube which is called by its outer diameter. For structural use, tubes are available in custom sizes. Alloy Steel:- ASTM A387 Gr.2/Gr.5/Gr.7/Gr.9/Gr.11/Gr.12/Gr.22. Feasibility Insulated pipelines are usually assembled from pipes of 6 metres (20 ft), 12 metres (39 ft), or 16 metres (52 ft) in length, laid underground in depth 0.41.0 metre (1 ft 4 in3 ft 3 in). The thickness of a tube is defined by a gauge number. 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. Eg: Galvanized water pipe. Pipes and tubes are common words that are heard daily as they are found in various places around the house. 1-1/2 pipe size flanges have an opening to fit over 1.90 OD the actual outside diameter of 1-1/2 pipe. As such, maybe it should be called copper pipe. Whereas pipes are normally used to transport gasses or liquids making it important to know the capacity. Installing Handrail, Railing & Misc. XXS). | Role and Responsibilities and Basic Requirement, HVAC Training Free Online: Boost Your Career with No Cost, HVAC heat load calculation software free download, Free HVAC Load Calculation Software: Simplify Your HVAC Design Process, Radiant Cooling System Vs Conventional Air Conditioning System, TOP 10 Best YouTube HVAC Channels to Learn, Lowest first cost: Galvanizing is lower in first cost than many other commonly specified protective coatings for steel. Delivery time is short. Piping Stress Interview Questions with Answers 1) How to make a critical line list or flexibility log? Contact us: 8am - 5pm CST (877) 887-9523. Why Mechanical Engineers are Mostly Preferred in HVAC Industry? 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. Here I will show you the list of carbon steel, alloy steel, stainless steel, and nickel steel grades. Here's how they differ: Tube size: A tube's measurements are determined by three important dimensions. Dear Anup thanks, I am Noor ul Arefeen from Pakistan. Tubes are available as rigid as well as flexible depending on the application. FRP Pipe / GRP Pipes are manufactured by the widely used helical filament winding method. Currently, I work in a reputed MNC as a Senior Piping Stress Engineer. It is generally used for structural purpose, the OD is important and exact number. Pipe will always be round however tube can be round, square or rectangular. Comparison of Pipe and Tube | Pipe Vs Tube (With PDF) Tube normally has a thinner wall thickness. Below 18 seamless pipes are used. A/B/C, ASTM A333 Gr.1/Gr.6. ), 1D (Where D is the diameter of the pipe.). www.wermac.org uses Tube vs Pipe - The Differences Explained in Plain English, Stainless Steel Backsplash - with Shelf / Bar. Tubes are typically ordered to outside diameter and wall thickness; however, it may also be ordered as OD & ID or ID and Wall Thickness. This is an importa. Tubes are used for mechanical applications (Heat Exchanger, Fired heater, Boiler, etc. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'whatispiping_com-banner-2','ezslot_5',851,'0','0'])};__ez_fad_position('div-gpt-ad-whatispiping_com-banner-2-0');report this ad, Comparison of Pipe and Tube | Pipe Vs Tube (With PDF). Mechanical Interview Questions 4 - Industrial Blogs Ans: Case Study of Tank Farm Design and Dike Wall Height Calculation, Ans: Differences between ASME B 31.4 and ASME B 31.8, Ans: Pressure Temperature Rating and Flange rating of ASME Flanges, Ans: 13 major differences between Seamless and Welded Pipe, Ans: Considerations for Storage Tanks Nozzles Orientation, Ans: Stress Analysis of Water Pump Station Piping using Flexible Sleeve Coupling, Ans: Flange Insulating Gasket Kits for Industrial Application, Ans: Guidelines for Modeling and Supporting of Large Diameter Pipes / Pipelines, Ans: Comparison between Piping and Pipeline Engineering, Ans: Difference between Tee and Barred Tee, Ans: Piping Thermal Bowing Consideration in Caesar II with an example, Ans: An Introduction to Pressure Surge Analysis, Ans: Difference between API 650 and API 620 Tanks: API 650 vs API 620, Ans: Types of Stresses in a Piping System, Ans: STRESS ANALYSIS OF SURFACE LAID PIPELINES, Ans: Difference between ASME B 16.47 Series A and Series B Flanges, Ans: Introduction to Piping MTO, BOM, BOQ & MTO Stages, Ans: Steam Traps: Definition, Types, Selection, Features, Codes & Standards; Drip Legs: Definition, Purpose, Configuration, Selection, Installation, and Sizing (PDF), Ans: Front End Engineering Design or FEED (PDF), Ans: Surge Relief Valve: Definition, Function, Types, Sizing, Selection, Ans: Slug Catcher: Definition, Types, Selection & Design Steps. With the exception of copper and brass, tubes can be shaped with some effort. The outside diameter of pipe up to size 12 is numerically larger than corresponding pipe size. Pipe is only hot rolled. Less maintenance/Lowest long-term cost. PIPE Can only b Orthogonal. 11 most important questions & answers from ASME B 31.3 which a Piping stress engineer must know. Tubes are produced in small lots (low yield) due to relatively small dimensions and cumbersome inspection and quality control procedures throughout the manufacturing process. difference between pipe and tube - ALLInterview Pipes are measured using the inside diameter. If youre interested in requesting a product quote, please click below to get started! Minimum spacing of circumferential welds between centerlines shall not be less than 4 times the pipe wall thickness of 25 mm whichever is greater. The above shows the difference between a 1-1/2 pipe flange and a 1-1/2 tube flange. Standard pipe schedules or pipes sizes as given by ANSI / ASME B36.10M and API. Required fields are marked *. Both can be galvanized. 2. 3.Tubes are used for stuctural purpose, pipes are used for fluid transfer. The molybdenum is added to help resist corrosion to chlorides. The biggest difference between pipe and tube is there shape. However not all tubes are pipes! a pipe can never be made with out schedule/NB etc and pipe ID/OD/NB will change as per size and schedule but there is no specific standard for tube. Measurement Tube is typically ordered outside diameter and wall thickness. Paste as plain text instead, Tube wall thickness is expressed in millimeter, or inches, or BWG (Birmingham wire gauge.) Shop Now! The reason many people, including plumbers, engineers, and others, mistakenly believe NPS refers to the ID on smaller pipes is because of how the standard was originally defined. I am a Mechanical Engineer turned into a Piping Engineer. | Types of Fired Equipment for Oil and Gas Industries (PDF). Most common materials used for pipes are carbon (API 5L, ASTM A106 / A53) and low alloy steels (ASTM A335). Piping QC - Inspectors Questions and Answers [Pipe Fittings] - EngLogs Required fields are marked *. Nickel Steel :- ASTM A203 Gr.D/Gr.E, ASTM A353. AmbitionBox Interview Questions. Clear editor. Ans:11 most important questions & answers from ASME B 31.3 which a Piping stress engineer must know. Technical solution / TecSolution 3.3Welcome by TecSolution 3.3 . Tube Wall thickness is expressed in millimeters, inches, or BWG (Birmingham wire gauge. In case you could not find out a specific answer reply in the comments section. Sir so many piping draftsmans are hired on temporary or contract basis. Ans: Stress or Strain: Which comes first? 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. This website is my first venture into the world of blogging with the aim of connecting with other piping engineers around the world. 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. they have different diameter.. so it can impact their flow.. Tubing is usually ordered and held to tighter and more stringent tolerances and specifications than pipe. 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. 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 millimeters. Piping Interview Questions Part-3 (Material Standards) - HardHat Engineer Outside diameter of tubes is numerically equal to the corresponding size. | Introduction to High-Frequency Welding Machine (PDF), link to What is a Fired Equipment? if piping is more Pipe rack is required. Reviews Jobs Interview Questions About Company Salaries Benefits Home . However, tubes of different other shapes like square, rectangular, etc. AmbitionBox. When it comes to measurement of pipe, it is measure by the inside diameter, often called the nominal diameter. Nominal Pipe Size (NPS) is a North American set of standard sizes for pipe. MITER BEND: How to Calculate Length, Angle of Cut, Weight, and Cut-back of the Miters? The thickness of tubes is dependent on the use thickness is decided. Tube has no joint down the length. What is a Pipe: The pipe is pressure tight circular hollow section that used in piping systems to transport gases or fluids. Ans: What is Acoustic-Induced Vibration or AIV? 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. QC Welding Inspector Interview Questions . Your email address will not be published. The most important dimensions for a steel tube are the outside diameter (OD) and the wall thickness (WT). Pipes are always round in shape. Few more piping stress interview questions with answers for you.. Spring hangers: Common Interview Questions with AnswersInterview questions with Answers for Jacketed Piping Stress Analysis. The name TUBE refers to round, square, rectangular and oval hollow sections that are used for pressure equipment, for mechanical applications, and for instrumentation systems. Difference between pipe and tube? - Glassdoor It is measured by outside diameter and wall thickness. Most people, even experts working in related industries, don't actually know. Generallythe outer and inside surfaces of the tubes must be smooth. In the next video, I will explain to you the flange-related questions. What is the Difference between Pipes and Tubes? - Let'sFab Your previous content has been restored. Automated page speed optimizations for fast site performance, HVAC INTERVIEW QUESTIONS FOR PIPING & FITTINGS. The thickness of a steel pipe is designated with a "Schedule" value (the most common are Sch. What is the difference between Pipe and Tube? - wermac I must be old. The most important mechanical parameters for pipes are the pressure rating, the yield strength, and the ductility. And nickel steel is used for a low-temperature application. Process Engineer Interview Questions - EnggCyclopedia Many a time, these terms are used interchangeably. for thinner wall thicknesses, whereas larger measures are expressed with fractional or inch indexes. Pipes are available in the small bore as well as the big bore. | Introduction to High-Frequency Welding Machine (PDF), Types of Pipes | Classification of Pipes (PDF), https://whatispiping.com/basis-for-deciding-stress-critical-lines, https://whatispiping.com/basics-of-pipe-stress-analysis, https://whatispiping.com/spring-hangers-common-interview-questions-with-answers, https://whatispiping.com/supporting-of-piping-systems, https://whatispiping.com/design-considerations-expansion-bellow, https://whatispiping.com/dynamic-restraints, Stress Analysis of Pump Piping (Centrifugal) System using Caesar II, https://whatispiping.com/wrc-107-and-wrc-297, https://whatispiping.com/control-valves/#Control_Valve_Assembly, https://whatispiping.com/pipe-support-span, https://whatispiping.com/co-efficient-of-friction, Modeling of Sway Braces in Caesar II for stress analysis, Use of Sway Brace, Strut and Snubber for pipe supporting, Piping Elbow or Bend SIF (Stress Intensification Factor), Difference between ASME B 31.3 and B 31.1 (B31.3 vs B31.1). HDPE (High-density polyethylene)-High-density polyethylene (HDPE) or polyethylene high-density (PEHD) is apolyethylene thermoplasticmade frompetroleum. Pipes are always round, whereas tubes can be square, rectangular or round. Your email address will not be published. After all, how different can hollow cylinders get, and who really cares enough to go and look? What are the commonly used material for Pipes, butt welding fittings, flanges, and plates? Answers to most of the questions are added here for reference. Tubing is generally used in applications where smaller diameters are required. Pipe is the word used for round tube only. Bending and coiling tubing can be done without excessive distortion, wrinkling or fracturing. Pipe will always be round however tube can be round, square or rectangular. Two pipes of different NPS and same schedule have different wall thicknesses in inches or millimeters. 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. Ans: What does a Pipe Stress Engineer need to know? Tubes are usually wrapped with a wooden box or thin film and delivered with much care. 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. Ans: Pipe Thickness Calculation of Straight Pipe under External Pressure/ Vacuum Pressure Condition. The schedule number can be the same on different size pipe but the actual wall thickness will be different. February 6, 2013. What is their future ? Piping Component Quiz Test yourself, Take This Quiz. There's also the difference in shape; you can look at a stainless steel . Pipesare generally measured by the inside diameter (ID), often called the nominal diameter, and a schedule, which refers to the wall thickness whereas for tubes, the outer diameter (OD) andwall thickness, which are exact measures in inches or millimeters roughly corresponds to the tube size. The circular shape of the pipe make it efficient when handling pressure from the liquid flowing through. Joining pipes is more labor intensive as it requires flanges, welding, threading, etc. Pipes are used for transporting gasses or liquids making it important to know the capacity. You have probably heard pipe and tube used interchangeably but are they different. 1.tubes is used to the heat and mass transfer, tubes and pipes both are use as required (application). a tube ID can be 5mm and wall thickness can be 10 mm. 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. For pipe it is laborious to ensure duration. Pipes accommodate larger applications. This is also popular by names Radio Frequency Welding, RF Welding, or HF Welding Process. What is a Fired Equipment? Learn about Ultra-tec cable cutting, swaging measurements and how to install cable railing. I am sure there will be many more differences, so I request the readers to list out those in the comments section. Stainless Steel: ASTM A312TP304/TP304L/TP304H/TP308/TP310/TP316/TP316L/ TP316H/TP317/TP321/TP321H/TP347/TP347H/TP348/TP348H. and wall thickness) only two may be specified with tolerances and the third is theoretical. Construction They consist of a steel pipe, an insulating layer, and an outer casing. Tubing is typically ordered to outside diameter and wall thickness; however, it may also be ordered as OD & ID or ID and Wall Thickness. 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. The outside of the pipe is always larger than the inside. These flanges are of forged construction. 4-3/4 OD Tube X 11 gage has an inside dimension of 4.51 inches. ), for instrumentation systems (used for measuring instruments); for structural applications, etc and could be rigid or flexible. Refer EJMA for more details. Carbon Steel :- ASTM A285, ASTM A515, ASTM A516. What are the differences between pipe and tube ? Your above subject is very informative and you have tried to contain very big topic in short spain. 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