Latest News – Onstream Pipeline Solutions

Freezing City Heating Water

16th September 2021

Case:

A while ago we got in touch with a new department of one of our customers which was in charge of some pilot projects in city heating water in Flanders. They had already taken their city heating installation into service for a new industrial site. As an expansion of the site was necessary they contacted us to inform if it was possible to extend their network on a dead-end without taking it out of service.

Solution

As OPS we were capable of supplying different solutions to perform the intervention of which we chose to freeze the feed and return city heating water pipes DN40. This decision was taken because there would be no flow in the dead-end and wall thickness for welding a linestopp fitting was limited.

Job execution

Together with our customer and a partner we managed to make this a one day intervention.
We started the intervention by venting the pipeline so there was no air which could affect the freezing process. Once vented the temperature at freezing positions was about 70°C. OPS operators started the freezing intervention using liquid nitrogen expansion. After a while we managed to get the pipe completely frozen which we double checked with both temperature control and venting the pipe again.

Customer performed their network expansion welding intervention during OPS freezing supervision and the job was completed in only a few hours.

Feedback:

Chosing freezing over linestopp was truly the best solution for this application. The city heating department was statisfied with the OPS provided solution and concluded the intervention was an effictive solution worth repeating.

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Inhouse POLYSTOPP® Quick Connect Demonstration

11th March 2020

The past years TDW has been doing a lot of R&D on the POLYSTOPP® equipment and they found a solution to make interventions both quicker and safer. The devolopped solution is called the POLYSTOPP® QUICK CONNECT. Before bringing new equipment in the market a series of tests have to be executed. In the final fase of testing, a field test with customer supervision has to be performed. An alternative for this would be to do simulated inhouse field test with supervision of customers.

As TDW contacted us to simulate a DN90 POLYSTOPP® intervention in supervision of some of our customers, we were happy to agree on this and to invite some end customers.

In the morning we presented a TDW presentation in which the new POLYSTOPP® QUICK CONNECT’s features, advantages and other properties were explained. The presentation was followed by the inhouse field test. TDW provided beside the new POLYSTOPP® equipment also a test rig on which the POLYSTOPP® fittings could first be welded, followed by a double position line stop operation with bypass. Before the line plugging heads could be inserted in the pipe, we needed to use the PS2000 tapping machine to drill trough the PE pipe.

When the simulated remedial work was performed, the plugging heads could be retracted and the completion plugs could be set.

The build-up of equipment and necessary intervention actions were executed by the attending customers with assistance of our OPS operators and with the supervision of a TDW POLYSTOPP engineer.

We want to thank our customers for attending the event and we want to thank TDW for assiting us in this event with all the equipment and one of their POLYSTOPP® QUICK CONNECT engineers.

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Case Study: Rerouting Gas Supply

3th till 5th March 2020

Case:

A Belgian customer contacted us for rerouting a production factory’s gas supply. The customer was supplied with gas over 2 pipes of which one was located in a sold industrial estate and had to be removed for new buildings. Shutdown of the factory would be very costly.

Solution

After a site visit and a short meeting, the decision was made to remove one of the gas supply pipelines without shutting down the factory’s production. The solution we agreed to consisted of 2 Spherical 3-Way Tee, a new connecting pipeline and a double Shortstopp operation. To lower customer project load, OPS included welding services within the project cost.

Job execution

Day 1:

To provide a safe and well known enviremont for welding and shortstopp operations, day 1 was dedicated to measuring pipelines and wall thicknesses. To take exact measurement, a specilialised contracter came on-site with OPS assistance.

Day 2:

OPS assisted a welding contractor on-site to weld-in shortstopp and hot-tapping fittings. As mentioned above: 2 spherical 3-Way Tee’s were placed. Additionally two Welding Fittings were installed to provide a pressure relief and a second position to ensure a double block and bleed operation.

Day 3:

Two OPS operators came with the welding contractor on-site to perform final project operations. OPS Performed Hot-Tap & Shortstopp interventions on the welded fittings. Performing these interventions, the gas supply was redirected from two gas supplies to one gas supply which fed both pipelines past the TDW fittings.

To make sure the bleeded pipelinesection was completely clear, a additional similar intervention was performed at the gas supply cabin. When the bleeded pipe section was clear, the pipe was cut and end caps were welded to make gas leakage impossible.

Feedback:

Because of contractual issues, the end customer needed a quick and safe solution without shutdown of the factory’s production. The general feedback was very positive on work procedures and customer contact. An additional positive feedback aspect was the lead time of about 2 weeks from sales jobsite visit to finalizing job execution.

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TDW PIUG Event Paris

17th till 19th February 2020

February 17-19 TDW hosted the PIUG Event for TDW channel partner and customers. Togheter with some of our customers we attented the event and had the chance to meet and discus partners from all over Europe.

During the event, we had the chanee to see a demonstration of TDW’s latest technologies:
– POLYSTOPP® Quick Connect
– Prostopp® DS Isolation Tool

After the demonstration we saw presentations of all customers we’re they indicated their interests and problems in gas distribution. The goal of these discussions was to learn from each other en to see where TDW fits in on everyones stories.

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Freezing City Heating Water

Inhouse POLYSTOPP® Quick Connect Demonstration

Case Study: Rerouting Gas Supply

TDW PIUG Event Paris

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