Flange Weld Testing

Red Rock offers a wide range of flange weld testers that are available for rental, both short-term and long-term from ½” thru to 48″ up to ANSI 1500. 

1/2″ to 48″

Red Rock offers a wide range of flange weld testers that are available for rental, both short term and long term from ½” thru to 48″ up to ANSI 1500.  For sizes and pressures above 24″ and ANSI 1500 please contact us to discuss. Special tools can be shortened or lengthened to suit your specific requirements.

Designed to pressure test various types of flange weld connections, including weld-neck, slip-on and lap-joint, eliminating the need for a full system test.


The body of the tool is made from high grade carbon steel and the seal is made from Polyurethane which has a low hysterisis. All units are hydro tested prior to shipment and supplied with full operating instructions and QA/QC Certification

Utilisation and Operations

When the tool is set the seal is expanded radially against the pipe bore mechanically (up to 4″) or hydraulically (6″ and above) to seal off the area to be tested. The annulus created is then filled and vented with the test medium and pressurised upto the required test pressure which can be up to ANSI 1500 depending on flange rating.

The tools can be set in both horizontal and vertical piping or inclined if required. Testing is achieved in a fraction of the time (and cost) of a full system test, whilst also reducing the provision and disposal costs associated with large volumes of test medium. Most tools can easily be installed and operated by one suitably trained person.

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Our Strengths

Professional Training

Ensuring your staff can complete the tasks required safely and to the standards that are required to meet your projects timelines.


All gear that leaves our yard will be tested and have the required documents to comply with your requirements.

Global Coverage

Equipment or Training required in a different country. No problem at all we have the capabilities and staff to train and equip your team anywhere.

Data & Technology

All our equipment and training documents are stored on our online database for easy field access. Reducing any downtime or issues when information is required

“Using Red Rock to train our personnel and dry hiring the gear needed from them has allowed us to streamline our testing process”


Safety and Compliance

Ensure your testing procedure is done correctly and to the approved standards.