Marcol,

Many thanks for your help! I see you used the offset and indirect functions to solve the problem. I didn't realise that you could use these functions in this scenario. Great tip!

Just for your information S.A.W. stands for Submerged arc welded. It is basically a more robust version of an ERW type weld that is welded bidirectionally instead of unidirectionally as in the ERW type weld, so thus produces a more robust pipe used mainly for structural applications in the offshore oil and gas industry.

Thanks again for your help and time!