Localised Weld Test Tools

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Hydrostatic Testing

Page last modified
October 31 2023

In-Line Weld Test Tools provide hot work barriers and localised hydrostatic testing to verify the integrity of welds or fittings, reducing system downtime, minimising environmental impact and increasing worksite safety.

In-Line Weld Test Tools are commonly used during the maintenance and modification of piping or process equipment, enabling localised pressure testing. Inserted into the piping or equipment component to be tested, In-Line Weld Test Tools provide a fast and efficient method of verifying the integrity of butt welds, joints or other welded pipe components.

Additionally, Inline Weld Test Tools can be used to provide a verified atmospheric barrier adjacent to the hot work source. Once positioned at location and activated these tools provide a verified vapour barrier allowing hot work activities to safely take place.

To conduct a test of the new weld the Inline Weld Test Tool is repositioned over the weld area and hydraulically set, activating the dual elastomer seals and creating a test boundary. The weld test is typically undertaken using water as the test medium, however this can be conducted using inert gas where necessary. The test is typically a strength test of the joint at 1.5 times the design pressure, although can also be used as a leak testing means, typically undertaken at 1.1 times the design pressure.

In-Line Weld Test Tools can be configured with increased seal span to provide a test envelope for valves and branch fittings. Extended tools are available on request configured to suit application.

Pro/con

Reduces system downtime and increases worksite safety by minimising pressure test volume
Operators save time and reduce costs by limiting test area to only the new weld or welded components
No requirement for full system pressurisation, beneficial to mature systems by decreasing potential for spading or leakage
Installed and activated in a matter of minutes
Can not resist pressure - ambient vapour barrier only

Specification

Size Range ¾” to 36”
Pressure Range Up to 690 Bar / 10,000 psi
Activation Hydraulic above 2"

Relative Business Impact

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Technology Readiness Level

[9/9]

Development Technology demonstration Mature / Proven
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STATS Group are market leaders in the supply of pressurised pipeline isolation, hot tapping and plugging services to the global energy industry. DNV type approved isolation tools provide leak-tight double block and bleed isolation that enables safe and efficient maintenance and repair of onshore, topsides and subsea pipeline infrastructure.

Process Plant Solutions offer hot-work barriers and localised hydrostatic weld test tools to verifying the integrity of welds or fittings, reducing system downtime, minimising environmental impact and increasing worksite safety. Mechanical repair clamps and pipe connectors replace the need for welding, significantly reducing expenditure and associated risks with hot-work providing the tie-in, repair or end-capping of pipelines.

STATS has gained an excellent reputation for providing a responsive, client-centred approach combined with expertise and innovative products which:

  • Drive higher levels of safety in the industry  
  • Enhance environmental performance by reducing flaring and venting activities
  • Improve asset performance while reducing system or plant downtime
  • Support the industry transition to a low carbon future

Project management and engineering services are provided to support client needs including turnaround scopes, feasibility studies and contingency planning. In-house expertise extends over the entire lifecycle of hydrocarbon assets from construction, maintenance, asset life extension, through to decommissioning and on to hydrogen transportation, carbon capture and storage.

STATS provide high quality, fit-for-purpose solutions to ensure that the pipework and pipeline infrastructure of its clients meet the technical, safety and environmental standards required.

Headquartered in Aberdeen, Scotland, STATS Group operate globally through a growing network of operational bases, including Canada, USA, Qatar, the UAE, Oman, Saudi Arabia, Malaysia and Australia.  

Contact: 01224772461
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