Pipeline stress analyst interview questions 2 – I hope experts can provide answers; let’s learn together! *

Could you tell me which company’s interview questions these are?

The following list provides some of the interview questions asked in various interviews for a Piping Stress Engineer position. I hope you’ll be able to find the answers in ASME B 31.3, as well as in any textbooks on piping stress or piping handbooks. If you cannot find a specific answer, please reply in the comments section. This is one part of this collection; keep checking the website regularly for additional parts. 21) Write the equation for SE in terms of Sb and St from ASME B 31.3. Se = ((abs(Sa) + Sb)² + (2St)²)⁰·⁵ 22) What are the main differences between WRC107 and WRC297? WRC107 takes into account the strength of solid cylinders, without considering the strength of fittings, while WRC297 considers hollow cylinders and allows for the inclusion of the strength of fittings. 23) How is the anchor load for a rack calculated in the initial stages of a project? What are the standard guidelines used? In the preliminary design phase, if no specific requirements are available, the thrust on the fixing points can be estimated by multiplying the weight of the pipes by the friction coefficient, with an appropriate increase applied to this value. 24) Draw a typical control station layout and show its supports? The supports for the control valves are arranged with one side acting as an anchor and the other side serving as a guide. 25) How are pump piping routes planned and supported? The routing of pump piping is quite standard, so no further details are needed; just look up some relevant information. 26) How do you determine the position of the anchor points for the piping in the rack? The fixing points for the pipes in the pipe tray should be arranged as centrally as possible, so that thermal displacements can occur on both sides and the expansion forces can cancel each other out. Multiple fixed points are arranged according to the required controlled thermal displacement. 27) In a pump piping system, which side (suction or discharge) is more critical from a stress perspective? Justify your answer. I believe the pump’s outlet is under greater stress, especially in the case of high-pressure pumps. Due to the high pressure in the pump’s outlet piping, vibration problems can occur; therefore, extra care must be taken when installing supports for the outlet piping. 28) What are the main factors that determine the support span? 1 Strength 2 Stiffness/Flexure 3 Natural frequency. 29) What does API610 say regarding the allowable nozzle loads for a centrifugal pump? The values given in API610 are presumably empirical values; no specific research has been conducted on this topic. 30) Can you show the typical layout and support for PSV lines? No diagram will be provided; for PSV systems, it is necessary to take into account the control of accidental loads during pressure release as well as thermal displacement under high temperatures. And the contradictions between the two. 31) What is the effect of friction in Pipingstress analysis? Friction is an essential design factor in stress analysis, especially near equipment operating under harsh conditions; its impact on the results can be either favorable or unfavorable depending on the specific design. 32) How does the layout of a pump piping change with changes in temperature? At higher or lower temperatures, the piping system of the pump becomes more flexible. 33) Why is the allowable value for primary stress different from that for secondary stress? Primary stress is characterized by a lack of self-limitation, making it relatively dangerous. So, stricter controls are applied. Secondary stress is self-limiting and belongs to the process of fatigue failure. 34) Is the stress due to seismic anchor movement an occasional stress? Explain with proper reason? The stress caused by earthquakes is considered an occasional stress. The characteristic of accidental loads is that there is no persistent functional relationship between the load and time. 35) What is meant by the sentence ”primary stress is not self relieving but secondary stress is”? Explain in detail the meaning of the term “self relieving”. Primary stress does not have self-limiting properties; such loads do not release or decrease on their own, and it is only equivalent loads that can bring about equilibrium or destruction. Secondary stress, on the other hand, will decrease gradually or even disappear as displacement or time changes, along with the reduction in load. 36) Will SIF increase or decrease with an increase in pressure, other parameters kept constant? Justify your answer. There is no direct relationship between SIF and pressure. There is no pressure control in its calculation formula. 37) What is the role of the Y factor in the pressure thickness equations of B31.3 and B31.1? Y is the thermal influence coefficient. 38) Is the pressure thickness equation for bends the same as that for straight pipes in B31.3? For straight pipes, t = PD/2(SEW + PY); for elbows, t = PD/2(SWE/I + PY). The formulas for calculating wall thickness are different. 39) How does B31.3 define the terms Weldolet and Sweepolet? This is not clear. 40) Between a short-radius bend and a long-radius bend, which one has higher flexibility and why? Short-radius bends have greater flexibility, as can be determined from the formulas.

Let’s study together*; if it’s an interview exam, it will probably need to be open-book ~

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Piping Stress Job Interview questions for you The following list will provide few interview questions asked in different interview for a Piping Stress Engineer post. Hope you will be able to find the answers from ASME B 31.3 and any piping stress text books or from piping hand book. In case you could not find out a specific answer reply in comments section. This is the part one of the collection. Keep checking the website regularly for other parts. 1) How to make critical line list or fle * bility log? How will you decide critical line list with help of ASME B31.3? 2) How to decide Stress critical systems for analysis using Caesar II? 3) Which lines can be eliminated from formal Stress analysis? 4) Can you make a typical Sketch & supporting for column piping? How to decide how many load bearing clip supports to be used? 5) Draw a typical Sketch & supporting arrangement for tank farm piping? How tank Piping analysis is different from normal pressure vessel connected piping system analysis? 6) What is SIF? Formulas for In plane, outplane sif for elbow (B31.3)? 7) Value of sif, fle * bility factor for Bend? 8) What are the necessary documents required for stress analysis? 9) Why a Spring hanger is used? Can you write the formula for spring HL, CL & variability? 10) What are the different types of supports used in piping systems? 11) What do you know about Expansion joints and thier types? When these come into picture? 12) What are the normal types of load cases? Write the load cases for a typical stress system using static method of seimic and wind? 13) What is slug flow? What parameters are required to calculate Slug force? 14) What are the dynamic restraints? What is snubber and when do you use a snubber? 15) What is the minimum swing allowed in top mounted hanger? What will you do if that amount exceeds in a typical piping system? 16) What is cold pull and why it is used? 17) What is difference between Variable Hanger and Constant Hanger? What is the variability of Constant Spring hanger? 18) What are the inputs required for stress analysis? What do you check in Caesar analysis of a piping system? 19) What do you mean by the term “liberal stress”? 20) What is hot-cold philosophy for pump? Have you heard the term Pump alignment? The following list will provide few interview questions asked in different interview for a Piping Stress Engineer post. Hope you will be able to find the answers from ASME B 31.3 and any piping stress text books or from piping hand book. In case you could not find out a specific answer reply in comments section. This is one part of the collection. Keep checking the website regularly for other parts. 21) Write equation for SE in terms of Sb and St from ASME B 31.3? 22) What are the major difference between WRC 107 and WRC 297? 23) How Anchor load for a rack is calculated at the initial phases of project? What are the normal guidelines assumed? 24) Draw a typical control station layout and show its supporting? 25) How pump piping is routed and supported? 26) How you will decide the position of anchor bay in rack piping? 27) Which side (suction or discharge) in case of pump piping system is more critical from stress point of view? Justify the answer? 28) What are the main factors that decides support span? 29) What does API610 explains about aloowable nozzle loads for a Centrifugal Pump? 30) Can you show the typical layout and supporting for PSV lines? 31) What is the effect of friction in Piping stress analysis? 32) How layout of a pump piping changes with changes in temperature? 33) Why the allowable for primary stress is different from that of secondary stress? 34) Is the stress due to seismic anchor movement an occasional stress? Explain with proper reason? 35) What is meant by the sentence ”primary stress is not self relieving but secondary stress is”? Explain in detail the meaning of the term “ self relieving”. 36) Will SIF increase or decrease with increase in pressure, other parameters kept constant? Justify your answer. 37) What is the role of Y factor in the pressure thickness eqn. of B31.3 and B31.1? 38) Is the pressure thickness eqn. for bends same as that of straight pipe in B31.3? 39) How B31.3 defines the terms Weldolet, Sweepolet? 40) Between a short and a long radius bend, which one has higher fle * bility and why? The following list will provide few interview questions asked in different interview for a Piping Stress Engineer post. Hope you will be able to find the answers from ASME B 31.3 and any piping stress text books or from piping hand book. In case you could not find out a specific answer reply in comments section. This is the part three of the collection. Keep checking the website regularly for other parts. 41) What does B31.3 tell about SIF for sockolet and reducer? 42) Explain the role of Appendix V of B31.3? 43) Does B31.3 allow a stress limit of 1.33Sh in PSV pop up case or is it 1.20 Sh? 44) Explain how to model snubber in CAESAR II. 45) Briefly explain the modeling of Sway Brace is CAESAR II. 46) What is the basic difference between a snubber and a sway brace in terms of applicability? 47) Explain with reason as to what should happen to the SIF and Fle * bility factor of a bend when a trunnion is attached to it? 48) Explain the terms SIF and FLE * BILITY factor. 49) Why SIF is “not so significant” with primary loading? 50) What happens to SIF of a reinforced connection if thickness of reinforcement increases beyond 1.5 times header thickness? 51) What special note B31.3 provides for SIF of welding tees (B16.9) ? 52) Explain with reasons as to which one is having higher SIF: a 45 bend or a 90 Bend? 53) Explain with reasons as to whether for a non 90 degree branch the same SIF can be taken as that for a 90 branch? 54) If thickness of the header of a branch connection increases, what happens to its SIF, other parameters kept constant? 55) What are the methods for flange leakage checking? Write euations used for flange leakage checking in pressure equivalent method? 56) What are the major difference between ASME B 31.3 and B31.1? 57) Place the a) A 16 inch High pressure steam line b) A 6 inch Low pressure steam line c) A 10 inch Medium pressure steam line d) A 30 inch flare line e) A 8 inch process line and f) A 24 inch cooling water line. 58) How to decide the Spring height for a top mounted Spring hanger? What are the attachments used? 59) How do you calculate SIF for 45 degree lateral connections entering into flare header? 60) What are the transfer lines? Why does the stress analysis of transfer lines considered critical? The following list will provide few interview questions asked in different interview for a Piping Stress Engineer post. Hope you will be able to find the answers from ASME B 31.3 and any piping stress text books or from piping hand book. In case you could not find out a specific answer reply in comments section. This is the part four of the collection. I have already posted few other parts in my earlier posts. Click here to visit those and Keep checking the website regularly for other parts. 61. If a power plant is designed inside a Process refinery then where the specification break between ASME B31.1 & ASME B31.3 should occur? 62.What is category M fluid service? Provide some examples? 63.What will be the consequences of a steam piping having low pocket but not having a steam trap? 64.When and why the reducer of a pump suction piping is installed in bottom flat condition? 65. If you find a specification break (at flange) between carbon steel and stainless steel in a typical P&ID. What are the additional arrangements which a piping engineer should make for this? 66.Assume a straight pipe of length L anchored at both ends. When a temp change occurs the anchor force at one anchor becomes F1. Now the length of the same pipw increased to L2 and with similar temp change anchor force becomes F2. What is the relation between F1 and F2? 67. What is Piping Speciality item? How many types of piping specialty items are used in piping engineering? Can we include them in standard piping specification, explain with reason? 68.Why does the sustained sagging for steam lines are limited within 3-5 mm? 69. What is a “Double block & Bleed” valve? When such type valves are required? 70.In a normal tie-in where do you insert the spectacle blind? a) before block valve and towards new plant or b) after block valve and towards e * sting plant. Explain why. 71.What is the difference between a pipe elbow and a bend? 72. Among the following which material have the highest co-efficient of thermal expansion? A) Carbon steel b) Cast Iron c) Duplex steel d)Stainless steel e) Galvanized Carbon steel 73.What are the major parameters to be reported in support tag for a Shoe/Saddle type support? 74.What are the Metallic expansion joints? avoided? 75.What is hot sustained stress? Why do we check it? Do we need to check expansion stress for hot sustained case? 76. What is the philosophy of arranging pipes in the Pipe rack and why? Normally what % of area is kept reserved for future expansion? 77.What are the major difficulties faced by a stress engineer while analyzing two vertical rebolers connected with a single column? 78.What are the different types of combination methods available is Caesar II? What is the difference between Scalar and Absolute method? 79. Are process plant water lines considered pressure piping systems? 80. For what fluid service category may a hydro test be waived off as per B31.3? The following list will provide few interview questions asked in different interview for a Piping Stress Engineer post. Hope you will be able to find the answers from ASME B 31.3 and any piping stress text books or from piping hand book. In case you could not find out a specific answer reply in comments section. This is the part five of the collection. I have already posted four other parts in my earlier posts. Click here to visit those and Keep checking the website regularly for other parts. 81. Check the following load cases and tell me what is the difference between load case L3 and L4? L1. W+T1+P1 OPE L2. W+P1 SUS L3. between a Pipe and a Tube? 85. What is seismic co-efficient? How this is decided? 86. What is wind shape factor? How the value of wind shape factor is decided? 87. Why does the manufacturer produce pipes with OD constant for a specific size and varying ID? 88. What are the major responsibilities of a stress engineer? 89. What are the major differences between primary and secondary stresses in Piping? 90. Do you consider the vertical thermal growth for modeling fired heater in Caesar II? Explain with reason? 91. Why does the dummy of a piping system is also insulated for cold insulated piping system but not insulated for hot insulated piping system? 92. What are the major parameters and process inputs required for performing dynamic slug flow analysis? 93. Which parameters do you seek from civil department for performing underground piping analysis in Caesar II? Describe briefly the method of performing underground piping analysis using caesar II? What are the outputs to check and what to interpret from caesar results? 94. How to calculate pipe thickness for externally pressured piping system? 95. What do you mean by the term fle * bility ? How to ensure that the fle * bility of a piping system is appropriate? What are the means for increasing fle * bility? What will happen if more fle? * bility is provided to a piping system? 96. As per code ASME B 31.3 how many types of fluid service is available? 97. What are the code cases for ASME B 31.3? 98. Describe step by step methods for modeling a sway brace in caesar II? 99. In which way PDS, PDMS and SP3D differs? Which one is the best user friendly? 100. How to calculate the piping stress manhour for a specific project? The following list will provide few interview questions asked in different interview for a Piping Stress Engineer post. Hope you will be able to find the answers from ASME B 31.3 and any piping stress text books or from piping hand book. In case you could not find out a specific answer reply in comments section. This is the part five of the collection. I have already posted five other parts in my earlier posts. Click here to visit those and Keep checking the website regularly for updates. 101. Can we exceed the design pressure of a piping system more than its design pressure. If yes then in what condition? 102. What is the limitation of using PTFE slide plate? What can be done in such situation? 103. How to decide whether hydrotest or pneumatic test will be performed for a piping system? 104. What is bourdon effect of Piping system? When this effect become critical? 105. How do you check dummy ot trunnions for any project? Can you write the formulas used for this checking? 106. What is the difference between pressure safety valve and pressure relief valve? 107. Why do you consider slug flow in a piping system as critical? 108. What is the function of a gasket in flanged joint? 109. Why sustained stress is considered as a primary stress? 110. What are the major differences between SIF and SCF (Stress Concentration Factor)? 111. Lets assume from a 24 inch pipe header two tapping, one 2 inch and other one 4 inches, are taken. At the interconnection point in which case the SIF will be higher? 112. What is the industry accepted procedure for transferring anchor load for intermediate anchors (anchor in between two loops) where normally caesar shows very less value? 113. How to analyze stress packages when D/T ratio for the pipe exceeds 100? 114. Arrange the following piping elements with respect to fle * bility and SIF (either increasing or decreasing order). Assume pipe size and thickness are constant.: 1.5D bend, 1D bend, Straight Pipe, 4D bend, 10D bend. 115. What is primary membrane stress? 116. Which one is more fle * ble : 45° bend or 90° bend? Which one is having more SIF? 117. Can we call piping shoe a pipe component as per code? Explain with reason. What is your opinion about RF pad in this respect? 118. What does the piping code says about the operation and maintenance of piping system? 119. You want to make some changes in the e * sting plant and want to add a new line by hot tapping. From which point the ASME B 31.3 code will be applicable? 120. What are the terms Code Case and Code Interpretation signifies? The following list will provide few interview questions asked in different interview for a Piping Stress Engineer post. Hope you will be able to find the answers from ASME B 31.3 and any piping stress text books or from piping hand book. In case you could not find out a specific answer reply in comments section. This is the part five of the collection. I have already posted six other parts in my earlier posts. Click here to visit those and Keep checking the website regularly for updates. 121. How to model Air fin Fan Cooler in Caesar II? Why do you consider equipment weight in AFC modeling while for other heat exchanger we do not consider? What code need to be followed for nozzle load checking and what the code says about nozzle load checking? Why do we need thrust blocks for air fin fan cooler? 122. Can you write the NEMA equipment nozzle equation sets? What are the major differences in between API 617 and NEMA SM 23 from stress point of view? Draw a typical steam turbine piping layout? 123. Which standard is used for designing plate fin heat exchanger? Which table is normally followed for nozzle load checking? 124. How do you consider tank settlement while stress analysis? Is it a primary or secondary stress? Do you add tank settlement with sustained load cases? If yes why? What code says about tank settlement? What is tank bulging and why does it happen? 125. Draw a typical layout of a line connected with fired heater (Heater Piping)? Which standard is used for allowble nozzle loads? 126. What are the major differences in between B 31.3 edition 2012 and 2010? 127. Which standard says about rotary equipment alignment check? What is the criteria mentioned in that standard? While alignment checking spring will be in locked or design condition? 128. Calculate the number of loops for a 131. What is the equation for calculating seismic co-efficient? 132. What is guided cantilever method? What is the importance of this method? 133. What does the Appendix F of API 610 ensures? What are the equations? What the standard says for vertical inline pumps? 134. What do you mean by weld joint strength reduction factor and quality factor? What is the importance of these factors? 135. While providing preliminary rack loading what assumptions do you consider? 136. What was the most critical system you analyzed in the last company? Draw the layout? What changes you recommended? What is temperature of that line? 137. What are the minimum load cases required to consider while performing stress analysis of a vertical reboiler connected piping system? 138. Have you performed stress analysis of reciprocating compressor connected line? pulsation study? 139. What actually do you check during flange leakage checking by NC 3658 method? 140. Can we reduce the hydrotest pressure of pipe to less than 1.5 times the line design pressure? If yes then in what condition?

All in English, that’s amazing{:3_53:}

Are mechanical calculations that difficult? :'(:'(