Project description

This project was based on the supply of suitable weld isolation and hydrostatic/ N2 pressure testing equipment for the planned operation of the 12″ “Skarv” gas injection riser. For weld isolation purposes, a Twin Tyre Flexible Plug was used. This tool can navigate through bends and has a Double Block and Bleed (DB&B) function for hydrocarbon system requirements.  

A specially designed IJT was manufactured to perform a local leak test and verify not only the ESV flanged connection but the complete ESV after the flange face was repaired. This solution is a much safer and more efficient method of leak/pressure testing than full-scale leak testing of the entire riser section, which would entail an extremely large volume of N2 gas at a pressure of 460 bar. g., decreasing substantially the operation risk.  

For testing the FW of the new welded Flange, a shorter IJT with the same design concept was manufactured for the required 628,5 bar. g hydrostatic pressure test.