Ermeto weld nipples, types SKA and SKA-ORB, can be assembled in any EO tube fitting, so that this fitting type has a broad range of applications. Ermeto weld nipples are available in all sizes from 6 – 38/42 in the light and heavy series. The Ermeto weld nipple is welded to the tube end without the O-ring. Assembling beforehand a retaining nut with the right size and orientation should not be forgotten. Special guidelines and regulations may apply to the pre-handling of the tube end, the welding procedure, welding personnel qualifications, post-processing and testing and documentation of the weld connection.