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Hot Tapping
Pipeline Pigging
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Old pipe. Aged and failing infrastructure. The problem for municipalities across the nation is becoming increasingly more apparent, perhaps no more so than in Baltimore, Maryland.
The situation being faced by Baltimore comes in the form of very old, pre-stressed, concrete pipe with an ID of 102-inches. The pipe serves as the main collection line for the sewage system. Problems were confirmed when several sink holes recently appeared over the line. Even a city vehicle dropped half way into the pipe and had to be pulled out. In order to get a clearer picture of what was going on inside the large conduit, an ultrasound device was used to scan interior sections of the system. What was revealed was an accumulation of debris on the bottom of the pipeline. The material collecting was literally the top lining of the pipe which had collapsed. Since the pipe is so large, it is almost never full and gasses that accumulate have weakened the upper portions of the concrete.
Two of the most dilapidated sections of pipe were targeted for immediate refurbishment. The city wanted to insert liners into the pipe to stabilize the situation. It was also essential that the waste water line not be shut down at any time during repairs. The fact that TDW had established a proven track record with large diameter tapping, plugging and bypass operations put us on track to provide the technical capability and equipment required to get the job done.
The first site to be repaired was called Cherry Hill and the conduit runs down a slope. The original plan was to perform tapping and plugging operations on opposite ends of the pipe section to be re-lined, however, the upper portion was in such bad shape the process had to be modified. A vault and connecting conduit was constructed that ran from the top of the hill to the point where TDW would tap the line and insert a 60 by 102-inch folding head plug. Before repairs could take place, divers wearing fully enclosed steel, deep sea equipment had to enter the line section to remove all the debris so that the liner could be inserted and so that the TDW plugging head would be able to establish a clean seal.
With the bypass conduit in place and the line cleaned out, a guillotine valve was closed at the top of the hill diverting line flow through a sluice gate into the bypass conduit and to a 60-inch bypass tap where the 102-inch plugging head had been inserted on the downhill side of the repair site. The damaged section of line was successfully repaired and line flow was restored.
The second site at Chesapeake Avenue is in the final stages of repair and the folding plugging head is two days from removal as of this writing. Both hot tapping and plugging operations have been conducted in flawless fashion. It is expected that repair work on the 102-inch waste water line will be continuing into 2008 and beyond.
According to TDW Service Center Manager George Jackson, the first 60-inch tap and placement of the 102-inch plugging head in Baltimore which took place between August 13th and September 19th of 2007 represents the largest of its kind performed anywhere in the world and takes its rightful place along side of many other TDW industry firsts.
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The 60 x 102 -inch folding head plug in place.
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Key TDW technicians on the job site include David Ward, James Jackson and Jackie York. Overall project management was handled by Robert Baxley, Ron Watkins and Roy Clark. Their combined expertise and professionalism, together with the global reputation of TDW engineering serves as another solid example of the ability of TDW to take on essential and complex projects and see them through to successful completion.
For more information about hot tapping and plugging services for any size piping system, large or small, visit www.tdwilliamson.com.
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T.D.Williamson, Inc. received five awards from the Association of Marketing and Communication Professionals (AMCP). The 2007 international awards competition recognizes outstanding achievement by creative professionals involved in conceiving, writing, directing, shooting, and editing of audio-visual materials and programs. There were over 1,700 entries from throughout the United States and several foreign countries in the 2007 competition.
TDW received awards for the following works:
Platinum Award for, “Refinery Repair Case History” View Video
Category: Animation
Animator, Darold Oniwa Executive Producer, Rick Pruett
Animation depicting an innovative TDW repair for a refinery.
Gold Award for, “Refinery Repair Case History” View Video
Category: Use of Music
Editor, Rick Herrmann
Gold Award for, “Guadalajara In-Line Inspection” View Video
Category: Videography
Videographer/Producer, Rick Herrmann Executive Producer, John Morrow
Mini-documentary of an ILI performed near Guadalajara by TDW Mexico and TDW Services- fascinating scenery and conditions.
Honorable Mention for, “TDW TV #5”
Category: Other/Internal Newscast
Executive Producer, Steve Johnson Producer/Editor, Rick Herrmann
TDW TV#5 was the episode anchored by Bruce Binkley that described the new, global service center openings.
TDW Complete Video Archive
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Brochure
T.D. Williamson, Inc. continues to provide the most comprehensive hot tapping, plugging and pigging instruction available in compliance with Department of Transportation covered tasks, standards and requirements. Rigorous hands-on
training and operator qualification LineMaster™ programs are TDW's commitment
to the industry.
LineMaster Training assists you with ensuring that your technicians are trained at
the highest level available. In our state-of-the-art facilities and with our pressurized simulated pipeline, TDW's LineMaster Training program is an in-depth series of classes designed to fulfill DOT Pipeline Safety Operator Qualification rules. To meet DOT requirements, training programs must include classroom time, written exams and hands-on simulated conditions. TDW's LineMaster Training meets these requirements.
TDW LineMaster Training is the best in the business. The company you've trusted with your piping maintenance needs for more than 80 years has the experience to train your technicians and operators effectively and efficiently.
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April 2008
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T-101 Drilling Machine
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1-2
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Tulsa, OK - USA
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| 660, 760 Equipment Class |
3-4 |
Tulsa, OK - USA |
| Mechanics Class |
7-10 |
Tulsa, OK - USA |
| Transmission Equipment Class |
14-17 |
Tulsa, OK - USA |
| Transmission Equipment Class |
21-24 |
Tulsa, OK - USA |
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Distribution I Equipment Class
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28-May 1
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Tulsa, OK - USA
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New European Program call:
32-67-28-36-44
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Nivelles, Belgium
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Class Information and Registration Form
For more information, contact TDW at 918-447-5100 or toll-free at 888-839-6766.
Or call your local TDW representative.
New European LineMaster Training Program in Nivelles, Belgium contact Anne.Roberfroid@TDW.be or Call 32-67-28-36-44
Don't forget to visit TDW's booth at upcoming trade shows. We are attending several in the next few months, including:
Please check the entire 2008 show listing on the website.
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® Registered trademarks of T.D.Williamson, Inc., in the United States and in foreign countries.
TM Trademarks of T.D.Williamson, Inc., in the United States and in foreign countries.
T.D. Williamson, Inc. - 6747 S. 65th W. Ave. - Tulsa, OK 74131
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