I may have asked this before, but does anyone know if there is a standard for marking armaflex where there's a joint?

I might have an install coming up and its a tight budget, it will be the first one for a few years and the length of the pipe run will mean at least 2 joints outside accessable at low level. I was just going to use an indelable marker and simply write joint on the aramflex, But I didn't know if there now was a BS or EN for refrigeration/aircon pipe work that actually meant anything? As the Refcom site is just a phone directory with no ads.