Pipeline Services

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Commissioning

A SAFE AND EFFICIENT START-UP SOLUTION
A.Hak Pipeline Services offers a number of general pipeline commissioning services depending on the product-type and location of the pipeline. Once a pipeline passes a number of inspection tests, it is ready for use and can be filled with product. The highly skilled and experienced team at A.Hak Pipeline Services has developed specialized procedures to ensure this important stage is executed safely and efficiently, and always adapted to the special demands of the pipeline owner.

It is important that different requirements are set for the commissioning of low-pressure sewage systems than for high-pressure gas pipelines. For commissioning of transportation pipelines containing hydrocarbons, gas or liquid, we have developed an advanced vacuum method. This has proven to be efficient and cost-effective, with extreme reductions in the use of inertization gases as well as an extreme reduction in product losses due to flaring of mixtures. As a result, environmental impact is minimal.

We also offer our clients the possibility to impose additional requirements beyond those of the applicable legislation and regulatory frameworks.

For us, pre-commissioning generally includes the activities that precede the commissioning of a pipeline or system. Prior to commissioning, we offer the following inspections:
  • Welding records review
  • Material records review
  • Coating records review
  • Location inspection (as built records review)
  • Cleanliness inspection
  • Out of roundness inspection
  • Strength test
  • Tightness test
  • Stress test
  • Baseline surveys on wall thicknesses (to allow any damage to be identified at a later date)
  • Moisture level inspection
  • Function inspection, including valves, regulators and measurement systems
  • Cathodic protection.
If these, and possibly other, points are found to be in order, the pipeline can then be made inert, if necessary, before the commissioning takes place.

Vacuum commissioning
The advantages of filling under vacuum compared to filling with pigs, include:
  • No need for pig traps and pigs
  • No blending of product in the nitrogen buffer, saving 5-50% of product during filling, when compared to conventional methods
  • No nitrogen/product mixtures to be vented off, keeping noise levels and environmental impact to a minimum
  • Vacuum leak testing can determine whether the line is free of water When the line is at atmospheric pressure during the filling, 100% product will be measured, since prior to filling there was nothing in the line to contaminate the product.

Vacuum monitoring during the introduction of heated natural gas in a 48" pig trap.
Contact

A.Hak Industrial Services B.V.
Pipeline Services
Beukvenne 3
8112 BA Nieuw-Heeten
The Netherlands
T +31 (0)572 342 601
pipelines@a-hak-is.com

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