As many have said, get your GSR to direct you, if there is one. The procedures for testing that the pipework is sound, is specific to gas and needs to be done correctly by the Registered Engineer as part of the commissioning
Your Gas Safe Engineer is the one to advise you, not this forum
Until there's gas going through it, its just a pipe !!! At the end of the day its your firms RGI that will have the onus put on him when its commisioned. Fit the pipe, get him to test it, then get him to tell you how to protect it as it depends on its route as to what protection it needs. Easy saying "tell your firm to do one" but sometimes not that easy.
Have to agree with the other guys, gas pipes must be tested before they are wrapped and sealed then again after, you cannot do this so either your firm get the gsr guy to do it, or supervise you doing it but he still needs to do the tests, what kind of company gets a plumber to do that rather than just get the gsr guy anyway!
Nope- a pipe that is designed:/installed to when completed be used to carry gas is, even with no gas in it by definition still A gas pipe.
When there's gas in it, it's a live gas pipe!
You'll be well aware that the rules and recommendations for installing a gas pipe are different to those for installing water or CH pipes.
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