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Intelligent Pigging

Written By pipeline-engineer.com on Friday, June 28, 2019 | 11:06:00 AM

Intelligent ("smart") Pigging is an inspection technique whereby an inspection probe, often referred to as a "smart" pig, is propelled through a pipeline while gathering important data, such as the presence and location of corrosion or other irregularities on the inner walls of the pipe.
What makes intelligent pigging different is that smart pigs are capable of performing advanced inspection activities as they travel along the pipe, in addition to just cleaning it. Smart pigs use nondestructive examination techniques such as ultrasonic testing and magnetic flux leakage testing to inspect for erosion corrosion, metal loss, pitting, weld anomalies, and hydrogen induced cracking, among others. They are also able to gather data on the pipeline's diameter, curvature, bends, and temperature.


Smart pigging provides a number of advantages over traditional forms of pipeline inspection. It allows pipelines to be cleaned and inspected without having to stop the flow of product. It also allows the a pipeline to be completely inspected without having to send inspectors down its entire length. Finally, it provides cleaning and inspection services at the same time, saving companies both time and money.
This is how inteligent piging is working.


11:06:00 AM | 0 comments

Deadly Oil Pipeline Explossion in Africa

Written By pipeline-engineer.com on Monday, June 24, 2019 | 6:11:00 PM



(AFP)Scores are feared dead following an oil pipeline explosion in southeastern Nigeria, officials said Monday, with some putting the toll at more than 70. At least eight people died on Saturday in Kom Kom Town in the oil-producing Rivers State, according to an assessment Sunday by the police and a local official.
But locals were “putting the figures at over 70” people killed, the regional coordinator of the National Emergency Management Agency (NEMA), Walson Brandon told AFP on Monday. It was difficult to confirm the casualties because “the area is inaccessible after heavy rains this morning,” he added. Ogechi Nnamdi, a local resident at the scene said: “I saw about 20 dead bodies. Eleven had been carried away and more are in the swamp yet to be recovered.” Promise Chibuzo Nwankwo, a local politician, said the exact numbers of dead were unclear “but I can confirm to you that scores of persons were recorded dead as a result of the explosion.”
The explosion occurred on Saturday afternoon while maintenance work was taking place on a pipeline operated by the Pipeline Product Marketing Company, a subsidiary of the state oil company, the Nigerian National Petroleum Corporation. Leaks had been spotted on the pipeline in the week before the explosion, said Kennedy Azodeh, an official in charge of maintenance operations. “Locals including vandals stormed the area in boats and canoes to scoop the product”, he said.
The company eventually cut off the supply and began maintenance work “accompanied by police officers and members of the Nigeria Security Civil Defense Corps (NSCDC).” “People were asked to leave, but they refused”, Azodeh said. Several oil pipeline accidents have occurred in recent years in Nigeria, Africa’s biggest oil producer. In October 2018, 30 people died in the explosion of an oil pipeline attacked by looters in southeast Nigeria.
6:11:00 PM | 0 comments

California Natgas Pipeline return delayed



(Reuters) - Southern California Gas Co (SoCalGas) has delayed the estimated return of a natural gas pipeline until July 29 from July 5 after finding a couple of pipeline leaks in remote areas of the desert that the company said were "non-hazardous." SoCalGas, a unit of California energy company Sempra Energy, said this week it found the pipe leaks on June 7 and June 18 while working on Line 235-2, which ruptured on Oct. 1, 2017. After that rupture, SoCalGas took the adjacent Line 4000 out of service for inspection and maintenance. The utility has since returned Line 4000 to service but kept it and another pipe, Line 3000, at reduced pressure until Line 235-2 returns. Once 235-2 returns, SoCalGas said it will upgrade Lines 3000 and 4000.


Gas supplies have been tight in Southern California for years due to the pipeline limitations and reduced availability of the utility's biggest storage field at Aliso Canyon in Los Angeles, following a massive leak between October 2015 and February 2016. SoCalGas said the reductions or outages on Lines 235-2, 3000 and 4000 reduced pipeline system capacity by about 0.7 bcfd. Once SoCalGas starts returning the pipelines this summer, the utility has said its overall pipeline capacity should rise to 2.705 bcfd from around 2.355 bcfd now. SoCalGas has projected the increase in pipeline capacity plus storage withdrawals of around 0.68 bcfd would enable it to meet expected peak demand of 3.368 bcfd this summer without pulling gas out of Aliso. After the Aliso leak, the state mandated the storage cavern be used only to maintain system reliability after all other storage facilities and pipelines have been exhausted.


SoCalGas has said Lines 235-2 and 3000 are largely 1957 vintage pipelines, while Line 4000 is largely a 1960 vintage pipe. Line 3000 extends about 125 miles west from South Needles on the California-Nevada border to the Newberry Springs compressor station about 20 miles east of Barstow in the south central part of the state. Line 235 extends about 46 miles west from the Newberry compressor to Victorville, which is about 80 miles northeast of Los Angeles. Once all of the pipes are back, SoCalGas has said its pipeline capacity would rise to around 3.085 bcfd.


10:49:00 AM | 0 comments

Contentious Trans Mountain Expansion Pipeline In Canada

Written By pipeline-engineer.com on Saturday, June 22, 2019 | 6:09:00 AM

OTTAWA/CALGARY (Reuters) - Canada on Tuesday approved as expected a hotly contested proposal to expand the western Canadian crude oil pipeline it bought last year, providing hope for a depressed energy industry but angering environmental groups.
Construction on the expansion of the Trans Mountain pipeline is scheduled to resume this year, Prime Minister Justin Trudeau told a news conference. A senior government official, speaking on condition of anonymity, said earlier that Ottawa expected legal challenges to the approval. The project would triple Trans Mountain's capacity to carry 890,000 barrels per day from Alberta's oil sands to British Columbia's Pacific coast, alleviate congestion on existing pipelines and diversify exports away from the United States. Trudeau, who faces a tough fight in a national election scheduled for October, has been under pressure both from western Canadian politicians who accuse him of doing too little for the oil industry, and from environmental groups, which see the oil sands as a highly polluting source of crude production.

"This isn't an either/or proposition. It is in Canada's national interest to protect our environment and invest in tomorrow, while making sure people can feed their families today," he said, adding he knew some people would be disappointed. The Liberal government previously approved the expansion in 2016 but that decision was overturned last year after a court ruled the government had not adequately consulted indigenous groups. The approval was widely expected as the government spent $3.4 billion to buy the 66-year-old pipeline from Kinder Morgan Canada Ltd last year to ensure that the expansion proceeded. Western Canada's oil production has expanded faster than pipeline capacity, causing a glut of crude to build up.

Trudeau said the government would make a series of accommodations to indigenous concerns about the pipeline, including on protections of killer whale and fish habitats in British Columbia. One group of indigenous activists in British Columbia, called Tiny House Warriors, vowed in a statement that the expansion would not be built on their territory. "The Trudeau government does not have the right to put a pipeline through unceded Secwepemc land," spokeswoman Kanahus Manuel said. FURTHER OBSTACLES AHEAD The government's latest approval can be appealed through the courts. Trans Mountain also requires various permits and route approvals in British Columbia, where that province's left-leaning New Democratic Party government opposes the project. The B.C. government also plans to appeal a recent British Columbia Appeal Court ruling that the provincial government cannot restrict the flow of oil on pipelines that cross provincial boundaries.

British Columbia Premier John Horgan said his government was "disappointed" with the federal government's decision but would not unduly withhold construction permits. Construction is expected to take 2-1/2 years, investment bank Tudor Pickering Holt & Co said. Assuming work on the expansion resumes this year, the expanded pipeline could be in service in early 2022. "We will measure success not by today's decision but by the beginning of actual construction and more importantly by the completion of the pipeline," said Alberta Premier Jason Kenney, a frequent critic of Trudeau. "This is now a test for Canada to demonstrate to the rest of the world we are a safe place in which to invest."

The decision will help create billions in economic benefits across Canada as it allows Canadian oil to reach higher-paying international markets, the Canadian Energy Pipeline Association said in a statement. Eighty percent of the expanded pipeline's total capacity has been contracted to companies including Suncor Energy Inc , Canadian Natural Resources Ltd and Exxon-owned Imperial Oil Ltd, according to a National Energy Board filing. The Canadian government has long said it planned to sell the pipeline once most of the obstacles to its construction have been cleared. Numerous indigenous groups have said they are interested in investing in it.


6:09:00 AM | 0 comments

THERMAL ANALYSIS MODEL FOR HOT-TAP WELDING

Written By pipeline-engineer.com on Thursday, June 20, 2019 | 12:49:00 AM




(EWI) developed the PRCI Thermal Analysis Model for Hot Tap Welding V4.2 for PRCI. The model is intended to provide welding engineers with guidance for establishing safe parameters for welding onto in-service pipelines (hot-tap welding).

PRCI Thermal Analysis Model for Hot-Tap Welding There are two primary concerns with welding onto in-service pipelines. The first is for welder safety during welding, since there is a risk of the welding arc causing the pipe wall to be penetrated allowing the contents to escape. The second concern is for the integrity of the pipeline following welding, since welds made in-service cool at an accelerated rate as the result of the ability of the flowing contents to remove heat from the pipe wall. These welds, therefore, are likely to have hard heat-affected zones (HAZ) and a subsequent susceptibility to hydrogen cracking. The model allows burnthrough risk to be controlled by limiting inside surface temperature and hydrogen cracking risk to be controlled by limiting weld-cooling rates.



Industry Leader in Pipeline Software Tools

The use of this software model is not a substitute for procedure qualification. The model provides guidance for establishing safe parameters, but provides no means for demonstrating that these parameters are practical under field conditions. To demonstrate that the parameters are practical, a welding procedure based on these predictions should be qualified under simulated conditions. (1) A brief history of cooling rate prediction methods for welds made onto in-service pipelines is given in Appendix A of the user manual. Software Description The PRCI Thermal Analysis Model for Hot-Tap Welding is a stand-alone, user-friendly Windows application based on a complex finite element mathematical model. The model uses a proprietary finite-element solver developed at Edison Welding Institute (EWI). Mesh generation capabilities include sleeve, branch, and bead-onpipe geometries, the latter for buttering layers and weld deposition repairs. Heat-sink capacity values can also be predicted for comparison with fieldmeasured values. The multi document user interface (MDI) allows multiple cases to be run and heat input selection curves to be generated. The model was designed and developed to meet the requirements of API 1104, API 1107, ASME Section IX, BS4515, BS6990, and CSA Z662.



THERMAL ANALYSIS MODEL FOR HOT-TAP WELDING Systems Requirements Running the PRCI Thermal Analysis Model for Hot-Tap Welding V 4.2 software requires the following: 200 MHz or higher processor clock speed recommended Intel Pentium/Celeron or AMD K6/Athlon/Duron or compatible processor Software Validation The PRCI Thermal Analysis Model for Hot-Tap Welding was validated by comparing model predictions to experimental data generated during a previous PRCI-sponsored program at EWI and to predictions made using the existing Battelle model. The Cooling Rate Prediction capability results indicate that Battelle model predictions tend to be non-conservative for thin-wall materials, particularly at low flow rates, and very conservative for thick-wall materials. The PRCI model predictions tend to be relatively accurate, with a consistent level of conservatism across wall thickness range. Price: The current Thermal Analysis Model is available only on a lease basis


12:49:00 AM | 0 comments

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