scope:

This directive describes the design of pressure-loaded welded flanges and welded collars in accordance to the design conditions for tanks and apparatuses out of thermoplastics as mentioned in section 2

Polyethylene high density (PE-HD)

Polypropylene (PP-H, PP-B, PP-R)

Polyvinylchloride (PVC-NI, PVC-RI)

Polyvinylidenefluoride (PVDF) in the general application range: Diameter 500 up to 4000 mm for welded flanges and Diameter 500 up to 1200 mm for welded collars

The welded flanges referred to in the following comprise weldedon collars (figures 1 and 2) and welded neck flanges (figure 3) with flat gaskets.

The welded collars comprise welded-on collars (figures 4 and 5) and welded neck collars (figure 6) with flat gaskets and O-rings