(d) A 12 OD steel subsea export line is to be laid between two offshore production...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
(d) A 12" OD steel subsea export line is to be laid between two offshore production platforms. The seabed consists of gravel and sand. There are no physical obstructions on the pipelay route but there are strong currents, essentially oriented orthogonally to the pipeline route, which could cause scouring and instability. The pipeline is to be thermally insulated and laid directly on the seabed. SG seawater is 1.03 SG steel is 7.85 One cubic foot of fresh water (SG = 1.00) weighs 62.4 lb/cu ft. (i) Briefly describe the measures you would take to mitigate the risks of pipeline scour. (ii) For stability, the wall thickness must be enough to provide a net down force on the seabed of 80 lb/ft when the pipe is empty. Calculate the wall thickness (t) of the pipe. (c) A 24" OD steel pipeline, coated with a 3 1/2" thick layer of reinforced concrete, is laid empty on the seabed. The pipe wall thickness is 0.75". SG concrete, including reinforcement, is 2.8 SG seawater is 1.05 SG steel is 7.85. One cubic foot of fresh water (SG = 1.00) weighs 62.4 lb (i) Calculate the air weight of the steel pipe in lb/ft. (ii) Calculate the down force on the seabed in lb/ft when the pipe has been laid and filled with seawater for hydro testing. (d) A 12" OD steel subsea export line is to be laid between two offshore production platforms. The seabed consists of gravel and sand. There are no physical obstructions on the pipelay route but there are strong currents, essentially oriented orthogonally to the pipeline route, which could cause scouring and instability. The pipeline is to be thermally insulated and laid directly on the seabed. SG seawater is 1.03 SG steel is 7.85 One cubic foot of fresh water (SG = 1.00) weighs 62.4 lb/cu ft. (i) Briefly describe the measures you would take to mitigate the risks of pipeline scour. (ii) For stability, the wall thickness must be enough to provide a net down force on the seabed of 80 lb/ft when the pipe is empty. Calculate the wall thickness (t) of the pipe. (c) A 24" OD steel pipeline, coated with a 3 1/2" thick layer of reinforced concrete, is laid empty on the seabed. The pipe wall thickness is 0.75". SG concrete, including reinforcement, is 2.8 SG seawater is 1.05 SG steel is 7.85. One cubic foot of fresh water (SG = 1.00) weighs 62.4 lb (i) Calculate the air weight of the steel pipe in lb/ft. (ii) Calculate the down force on the seabed in lb/ft when the pipe has been laid and filled with seawater for hydro testing.
Expert Answer:
Related Book For
Automation Production Systems and Computer Integrated Manufacturing
ISBN: 978-0132393218
3rd edition
Authors: Mikell P.Groover
Posted Date:
Students also viewed these mechanical engineering questions
-
A device that is capable of both supplying a loop's power and reading the output signals of each of the instruments in the loop is a _____ O differential pressure transmitter Resistance Decade box...
-
Case Study: Quick Fix Dental Practice Technology requirements Application must be built using Visual Studio 2019 or Visual Studio 2017, professional or enterprise. The community edition is not...
-
The Quality Athletics Company produces a wide variety of sports equipment. Its newest division, Golf Technology, manufactures and sells a single product AccuDriver, a golf club that uses global...
-
Using kinked demand model, explain why a decrease in costs might not lead, to a change in price or output.
-
A 7970-V: 120-V, 60-Hz potential transformer has the following parameters as seen from the high-voltage (primary) winding: X1 = 1721 X2 = 1897 Xm = 782k , R1 = 1378 R2 = 1602 a. Assuming that the...
-
Each of the wires 1 to 3 in Figure P28.39 carries a current perpendicular to the page. The line integrals of the magnetic field around the three Amprian paths shown all have the same positive value....
-
To conduct an experiment, AMC increased movie ticket prices from $9.00 to $10.00 and measured the change in ticket sales. Using the data over the following month, they concluded that the increase was...
-
Operating systems and application programs play vital role in our daily usage of computers. Differentiate between an operating system and an application program give examples each.
-
From Exercise 10A-3, prepare a schedule of accounts payable and verify that the total of the schedule equals the amount in the controlling account. Exercise 10A-3:
-
Suppose a consumer values a Red Sox - Yankees playoff ticket at $150, and the seller is unwilling to sell the ticket for less than $200. What price will lead to an efficient transaction between the...
-
How does period affect the definition of fixed costs?
-
The Fulcrum Company produces decorative swivel platforms for home televisions. If Fulcrum produces 40 million units, it estimates that it can sell them for \($100\) each. Variable production costs...
-
What provider incentives are created under (a) cost-based reimbursement, (b) prospective payment, (c) capitation?
-
Why must a finance book consider taxes?
-
What are the two primary ways that costs can be classified?
-
11. Todas las noches, Roberto (hablar/vender) con sus padres durante la cena. 12. A Lola y a Juan les gusta (nadar/correr) por cinco millas cada da. 13. Yo no (conocer/bailar). a tu prima. Es ella...
-
suppose a nickel-contaminated soil 15 cm deep contained 800 mg/kg Ni, Vegetation was planted to remove the nickel by phytoremediation. The above-ground plant parts average 1% Ni on a dry-weight bas...
-
A PLC is used to control the sequence in an automatic drilling operation. A human operator loads and clamps a raw work part into a fixture on the drill press table and presses a start button to...
-
Solve previous problem 20.25, except that the average value of the dimension produced by process B is 0.10 mm greater than the nominal value specified. The average value of the dimension produced by...
-
An AGVS will be used to satisfy material flows indicated in the from-to Chart in the table below, which shows deliveries per hour between stations (above the slash) and distances in meters between...
-
In the FRED database, find a variable that is available in both a seasonally adjusted form and a not seasonally adjusted form. Plot both over time and describe how large the seasonal variation in the...
-
An economic variable is persistent if declines in the variable tend to be followed by more declines, and increases by more increases. This question asks you to study the persistence of the civilian...
-
It has been argued that the stock market predicts recessions. Using quarterly data since 1961, plot the real value of the stock market index (the Wilshire 5000 index in the last month of the quarter...
Study smarter with the SolutionInn App