Minimum wall thickness for steel pipes and Table 3 Minimum wall thickness for stainless steel pipes Scope of type approval This type approval certificate includes coupling types and accessories as follows: [...] connection technology, actual edition 2018”. Type Approval documentation TAP0000167, Rev. 1 Work scope: Standard renewal plus editorial update Documents - Assessment report production site Wipperfürth [...] pressure impulse and vibration test, fire resistance test (wet condition). Marking of product Component Scope Example Pipe coupling VOSS sign , manufacturer code, size, series VOSS, 1K, 16S Cutting ring VOSS