DIN CEN/TS 19102 is the first European standard specially addressing the design of membrane structures made from coated fabrics and technical foils. To ensure a holistic approach to the standardisation of membrane structures, informative annexes were added, providing preliminary guidelines for the execution and testing of membrane materials. As part of the transition into a Eurocode design standard for membrane structures, these guidelines have to be extracted and incorporated into dedicated execution and testing standards for membrane structures. Within the framework of the WIPANO research project 03TN0011A „Area weld seams of ETFE structures: Standardisation of execution, testing and design“, a five-part German draft standard series, E DIN 18229, was developed covering the quality assurance of welded ETFE-foils. This research project was a joint project with many partners from the industry including three manufacturers, two testing laboratories and an engineering office. In this collaboration the first four parts of E DIN 18229 were completed, which cover the qualification of the welding procedure and the welding personnel. The fifth part, detailing mandatory test methods for welded ETFE-foils as required for the qualification of the weld-ing procedure and welding personnel, was initially only conceptualised. Under the ongoing standardisation work at the Institute for Metal and Lightweight Structures at the University of Duisburg-Essen and in the context of developing an execution standard for membrane structures, E DIN 18229-5 was finalised. The standard includes test methods that can be applied during manufacturing, for internal quality control as well as for initial type testing and external inspections. These methods comprise non-destructive visual testing, peel tests with tool, manual tensile and peel tests as well as uniaxial short-term tensile test for welded connections of ETFE-foils. This contribution presents the various test methods in detail. In further standardisation efforts, the E DIN 18229 series is intended to be transferred into an EN standard to be referenced in the future execution standard for membrane structures.