Thumb rule for piping engineer

Normally, the lead piping material engineer, the individual responsible for all piping engineering functions, usually reports directly to the project lead piping engineer. Designing domestic hot water recirculation systems. Rules of thumb for mechanical engineers pdf download online. In the case of boiler feedwater pumps, the minimum flow is preferably piped back to the deaerator. All rules of thumb should be considered inaccurate and dangerous. Rule of thumb maximum flow velocity of water in pipes engineering. To become one, you typically need to earn a bachelors degree in mechanical, structural or civil engineering, fulfill licensing. Experience is typically what turns a good engineer into a great engineer. An engineer that can look at a pipe and a flowmeter and guess the pressure drop within 5%. Whether youre concerned with design, selection, or performance, youll find fast, accurate answers here all without wading through pages of theory. General suction system is an important part of the pump system and should be thought of as a very specialized piping design. The role of piping engineer is a supervisory role, so many employers prefer candidates with one to three years of experience. This blog is for all piping fabricators, designers and engineers out there.

The seasoned plumbing engineer will also pick up a few new ideas. Sizing liquid flow pipelines easily linkedin slideshare. If a higher degree of sophistication is sought, table 1 below can be used. Piping engineer must have sufficient broad knowledge to know that certain conditions can arise at the early stages of plant design, where lack of awareness can cause difficulties, revisions and unnecessary delay. A piping network in a processing plant is like a network of veins and arteries in our body. When i think of such rules, two authors come to my mind, walas and branan.

Pipe diameter on suction side should be equal or one size larger than pump inlet suction piping velocities should be limited to 7 to 8 feet per second or less. Someone who can at least estimate the size of a vessel without doing any calculations. Keeping the suction piping short ensures that inlet pressure drop is as low as possible. Purchase pipeline rules of thumb handbook 8th edition. Feb 18, 2017 thumb rules for engineering costs february 18, 2017 march 11, 2018 vikas khaitan sometimes a very rough high level engineering cost for a future project might be needed for budget approvals, initial planning, contracting strategy discussions, benchmarking of bid prices or negotiating with the engineering contractors. Depending on the size of the project, the lead piping material engineer may be assisted by a number of suitably qualified piping material engineers especially during the peak. In this video i showed the most needed thumb rule of civil engineering and with the help of this you can easily estimate the quantity of material and. Probably 95% of us dont use the right tools for calculating heat loads. Online pigbased method is widely used for monitoring pipes in oil and gas pipelines 6.

Made by faculty at the university of colorado boulder department of chemical and biological engineering. Squarefootassembly squarefoot estimates often also occur early in the project, using historical data to determine current cost. Rules of thumb for mechanical engineers pdf download. Loops are best for the longterm performance of a stress analysis. Rule 4 avoid using the lower 10% and upper 20% of the valve stroke.

This is based on the authors experience on the use of vocabulary in most design engineering, procurement and construction epc companies. But is this chart is not available, in that case, you can use thumb rule to get the spanner size. Whether youre concerned with design, selection, or performance, youll find fast, accurate answers in this ebook all without wading through pages of theory. One rule of thumb for setting the distance between piping levels is three times the largest pipe size. Utilities design rules design rules for utilities cooling water, cooling air, compressed air fuel, heat transfer and electricity insulations insulation design rules of the thumb for magnesia, asbetos, ceramic refractories, cryogenic, optimum. Mar 02, 2018 i am an air conditioning contractor and i have something to confess when it comes to air conditioning equipment sizing. If plumbing systems had to be designed for that scenario, pipe sizes would be huge. A ruleofthumb to use if you need to install liquid carrying pipelines without engineered drawings is to look for the largestsupplying nozzle. In all civil engineering works using the basic rule of survering working from whole to part is important while doing any layout.

A simple rule of thumb that was pointedout to me years ago concerns the class rating of flanges. Structural engineering design rules of thumb in the early stages of a project, we are often asked how large structural elements will be before we have had a chance to perform the necessary computations. The piping engineering world the piping engineering world. Deppmann monday morning minutes series will focus on the design of domestic hot water recirculation systems in the plumbing portion of the commercial and institutional building. Expansion loops all pipe stress engineers need to understand and be able to use simple rules, tools, and methods for checking loops in rack piping. Engineering pro guides mechanical and electrical pe. Process piping fundamentals, codes and standards module 1 a.

Introduction to piping engineering by gerald may, p. It transports fluids from one place to another, from one equipment to another. Some of the random thoughts are summed up here and i will try to uograde the list further. Jul 23, 2017 the design of process plants is a complex team effort involving different disciplines of engineering. It also requires considerable management and coordination skills. This chapter presents calculations for determining pressure drop in pipes, orifices, and control valves. Introduction to process plant layout and piping design. A manual of quick, accurate solutions to every day mechanical engineering problems.

This series will be of value to engineers and designers who are new to our industry. Bhatia 2 each piping engineer and designer should familiar with. As a rule of thumb, use 1 size larger pipe on the suction of the pump. How we develop thumb rule for building estimations civil. Aug 01, 2009 for example, chemical engineers might have their rules of thumb when designing any process equipment. Design rules of thumb in the early stages of a project, we are often asked how large structural elements will be before we have had a chance to perform the necessary computations. The application of applying this rule of thumb mainly in engineering design work can shorten the time required to design.

If you have multiple floors, then add up all the air conditioned area for all floors and insert a single number for the hvac building area value. Piping interview questions part9 essential questions part2. Once you find your weak areas, then you should go back and revisit the key concepts and skills within those topics such that you can be better prepared for the actual pe exam. A standard chart is available that shows the size of a given bolt and corresponding spanner size. There is a great deal of judgment that is required in evaluating the results. A practical and convenient reference, it provides quick solutions to the everyday pipeline problems that the pipeline engineer, contractor, or designer faces. Imho, rules of thumb are only useful to trigger further analysis. What is the thumb rule to calculate spanner size for a given bolt. The heating, ventilation, and air conditioning hvac equations, data, rules of thumb, and other information contained within this reference manual were assembled to aid the beginning engineer and designer in the design of hvac systems. Piping pressure drop p density, lbft3 d internal pipe diameter, in.

Now in its sixth edition, pipeline rules of thumb handbook has been and continues to be the standard resource for any professional in the pipeline industry. Engineering pro guides exams are created based on the four criteria that are used to determine what will be on the pe exam. Hvac equations data and rules of thumb boilersinfo. While most pipe thickness is within 1% to 2% of nominal. Hvac equations data and rules of thumb by arthur a. Now in its eighth edition, this handbook continues to set the standard by. Feb 12, 2011 if full engineering calculations are not possiblethe conservative approach is to select pipe sizes that produce a velocity of less than 3 msec. Shortcuts for pipeline construction, design, and engineering calculations. Time to phase out rules of thumb high performance hvac today. Now in its eighth edition, this handbook continues to set the standard by which all other piping books are judged.

Piping, in operation, is always in movement and subject to pressure and. The objective is to design and construct a plant in a costeffective manner. Presented in easytouse, stepbystep order, pipeline rules of thumb handbook is a quick reference for daytoday pipeline operations. Include a straight run pipe length equal to 5 to 10 times the pipe diameter between the pump inlet and any obstruction in the suction line.

Fluidflow rulesofthumbforchemicalengineersfourthedition. Piping loops can require extra pipe supports and can take up plant real estate. This is based on the authors experience on the use of vocabulary in most design engineering, procurement and. Equipment design rules of the thumb is intended to present parameters and guidelines for equipment design based on different industrial experience. Line velocities and pressure drop, with line diameter d in inches. Piping engineers might have their own when routing the piping. Rule of thumb for estimating number of engineering deliverables mjcronin mechanical 5 jun 14 14. Rule of thumb for estimating number of engineering deliverables. Rule of thumb for estimating number of engineering. A fairly good knowledge of loads and stresses is a must. Top 100 thumb rule of construction for civil engineer. If you have multiple floors, then add up all the air conditioned area for all floors and insert a single number for the hvac building area. Rules of thumb for piping sizing are listed, including. Rule 2 set the control pressure drop to 50 60% of the frictional pressure loss of the piping system.

Learn the key concepts and skills on the pe exam with the technical study guide. In addition to losses due to friction in a piping system, there are also losses. Of course, the plumbing engineer may decide to design more conservatively than the dfu requirements. In the sample office building above, you would use the 110,000 ft2 value in the hvac rule of thumb calculator. Uses a design heuristic related to energy losses in a piping system. Pipeline rules of thumb handbook 8th edition elsevier. Rules of thumb for mechanical engineers national bronze mfg.

Save time with this collection of straightforward, commonsense techniques that provide quick. Designing an industrial piping system that optimizes flow rates helps. This video will help you understand how the sizes work. Thumb rule is defining as we develop a constant number with our past experience and our field daily work experience. For example, chemical engineers might have their rules of thumb when designing any process equipment. Rules of thumb for chemical engineers sciencedirect. For more than 35 years, the pipeline rules of thumb handbook has served as the goto reference for solving even the most daytoday vexing pipeline workflow problems. The rough cost could also be helpful to plan the manning level in the design office. Sometimes a very rough high level engineering cost for a future project might be needed for budget approvals, initial planning, contracting strategy discussions, benchmarking of bid prices or negotiating with the engineering contractors. Pdf pipeline rules of thumb handbook 5e oscar gomez. In south africa we use the guidelines for human settlement planning and design, or what we just call the civil red book. Rule 3 limit the maximum flow rate through the valve. The responsibilities of piping construction engineers.

The dfu concept allows reasonable sizing of sanitary sewer lines, based on experience from many buildings. How to design an industrial piping system for ideal flow rate and. Download rules of thumb for mechanical engineers by j. We have found the following rules of thumb to be useful in estimating the approximate depth of a structural member as well. The straight run pipe gives you a uniform velocity across. For example, the working pressure for a class 400 flange at 100 f is approximately 2. I am an air conditioning contractor and i have something to confess when it comes to air conditioning equipment sizing. Dear fellow pipers welcome to the piping engineering world.

Pipe stress analysis steps pipelines, piping and fluid. Broadly speaking, there are two types of piping engineers layout engineers and stress engineers. Short answer using rules of thumb v max should be approximately 23s to 34s of vav box v nom v min should be approximately to 14 of vav box v max. Rules of thumb for mechanical engineers lasses in pipe fittings and valves. If this piping system is to be designed to code the following is required of the designer. Sep 10, 2012 uses a design heuristic related to energy losses in a piping system. To reduce capital costs, some engineers may decrease the pipe size to. Hvac rule of thumb calculator engineering pro guides. Rules of thumbs for sizing control valves learning. Jul, 2014 ever had trouble trying to order the right sized pipe. Whether youre concerned with design, selection, or performance, youll find. Rules of thumb for mechanical engineers boilersinfo. Online pig based method is widely used for monitoring pipes in oil and gas pipelines 6.

A piping construction engineer plans the schedule of piping works, assists with material procurement, oversees installations and maintenance operations and supervises construction staff. Rules of thumb for chemical engineers brings together solutions, information and workarounds that engineers in the process industry need to get their job done new material in the fifth edition includes physical properties for proprietary materials, six new chapters, including pharmaceutical, biopharmaceutical sector heuristics, process design with simulation software, and guidelines for. Cost estimating fundamentals and tricks of the trade. Their work environment is mostly an office setting but, depending on ones industry, the job can involve surveying field locations. Eliminate elbows mounted on or close to the inlet nozzle of the pump include 5 to 10 pipe diameters of straight run pipe between the pump inlet and elbow. Obstructions include valves, elbows, tees, and etc. The first step in passing the pe exam is to learn the key concepts and skills on the topics presented in the ncees outline for your specific pe exam power, thermal, hvac or machine design. Also covers tribology, vibrations, materials, stress and fatigue, instrumentation, and engineering economics.

Aug 03, 2015 now in its sixth edition, pipeline rules of thumb handbook has been and continues to be the standard resource for any professional in the pipeline industry. If full engineering calculations are not possiblethe conservative approach is to select pipe sizes that produce a velocity of less than 3 msec. Considerable attention must be directed to the pump suction piping to ensure satisfactory pump operation. Utilities design rules design rules for utilities cooling water, cooling air, compressed air fuel, heat transfer and electricity insulations insulation design rules of the thumb for magnesia, asbetos, ceramic refractories, cryogenic. Library of congress cataloginginpublication data pipeline rules of thumb handbook. The general rule of thumb is to maintain a velocity below 5 fts 1. Process equipment cost estimating by ratio and proportion. According to the bureau of labor statistics, the demand for civil engineers, which. Hi all, while reading one document reagarding piping, they have written mto for steam traps, valves for vent and drain can be calculated by using thumb rules i can understand that at the initial stage by keeping rake position and layout we can assume all posible rise and drops of our line and thus can estimate steam traps and vent drain. Download citation pipeline rules of thumb handbook this classic.