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Sometimes depends on client requirements. Usually following hydro, you may do a low pressure nitrogen test and potentially a high pressure nitrogen test depending on the risk appetite before introducing hazardous chemicals or gasses. What code is your piping designed to, have you consulted that...

Ok thanks all! Appreciate the responses.

No vent bore in the ball. These are trunnion mounted double piston valves with ptfe seats. So no pressurisation of the cavity should occur when the valve is closed after its been vented.

We have some ball valves that were leak checked during commissioning by shutting the valve (typically with pressure on one or both sides)by depressurizing the cavity and then checking the cavity vent for if either of the seals are allowing gas to leak through. Now assuming the test went fine and...

Hi All, Our contractor is proposing to install inspection plugs on hot insulated piping that can be removed for inspection of CUI. I understand the theory that they replicate the conditions of the pipe and can easily be removed for inspection, but I'm more concerned with how they perform in...

Hi All, We need to change out some studs on a control valve bonnet due to some concerns around stress corrosion cracking. The current bonnet studs are B8M's and we would be changing out with duplex studs. The problem is that there isn't a planned shutdown any time soon to do this and replacing...

The 'bent' region is basically mid span of the column. The contractor has worked it back straight now, and the concern is now microfractures within the material from being cold worked multiple times. I was wondering if we could somehow normalise the plastically deformed area by heat treating...

Hi everyone, I have a W8X31 H beam column which our contractor had difficulty installing so their 'solution' was to wrap a soft sling around and pull into position. This resulted in some inward localised bending of the column flanges which they then cold worked straight again with a hydraulic...

Ok good to know. Thanks for your responses!

Hi all, Has anyone heard of ECSCC being an issue on uninsulated SS process piping? SCC from the contents of the piping shouldn't be an issue as is carrying processed natural gas. However one of the customer engineers is concerned that the piping is operating above 60degC so wants all the...

So putting this jumper cable on isn't reintroducing a risk of galvanic corrosion between the two flanges? This is a carbon steel / stainless steel interface.

Hi everyone, does anyone know best practice for static bonding across carbon steel / stainless steel flange interfaces where an insulating gasket is used? The point of the insulating gasket is to electro-chemically isolated between the two flanges and avoid any galvanic corrosion. However one of...