CSN EN ISO 6947 This document defines welding positions for testing and production, for butt and fillet welds, in all product forms. Annex A gives examples of the limits of the slope of a weld axis and the rotation of the weld face about the weld axis for welding positions in production welds. Annex B gives a comparison of this document and US designation systems for welding positions. Original English text of CSN EN Standard. The price of the Standard included all amendments and correcturs.