The Stahlpanzerrohrgewinde (, "steel conduit thread") standard for screw threads, more often called by the shortened Panzergewinde (), was a technical standard created in Germany and subsequently used in Switzerland, Austria, and other neighboring European countries. It was retracted in 2003. The thread is used to join pieces of electrical conduit and cable glands.
Alternative stylings of the German name are Stahl-Panzer-Rohr-Gewinde, an abbreviated form StaPa-Rohr-Gewinde, and the acronym PG.
Overview The standard, codified by the Deutsches Institut für Normung (DIN, German Institute for Standardization), is DIN 40430. Panzergewinde sizes are named with the prefix PG plus a nominal number which approximately corresponds to the maximum cable diameter (in millimeters) that can be passed through the conduit.
Because the walls of the conduit are usually relatively thin, the thread depth is limited. Thus a thread angle of 80° is used. The Verband der Elektrotechnik, Elektronik und Informationstechnik (VDE) originally standardized the thread for use with conduit and cable glands that were made of steel. Today the thread is used with both steel (typically plated to resist rusting) and polyvinyl chloride (PVC).
Beginning in 2000, the VDE standard for cable glands (VDE0619) was formally replaced by EN50262. After a transitional period of several years during which it could still be used, it was replaced in 2003 by a final metric fine thread with pitch. Similarly, conduit threads were replaced by EN60423.
Even today, Panzergewinde cable glands are still often found on chemical reactors and bioreactors (for example, PG13.5 thread for screwing in sensors) and various other equipment, enclosures, junction boxes, and connectors.
Gland sizes Thread nominal size Thread major Thread density (TPI) Thread pitch Inner diameter Cable diameter (mm) (in) (mm) (in) (mm) (in) (mm) (in) PG7 20 PG9 18 PG11 18 PG13.5 18 PG16 18 PG21 16 PG29 16 PG36 16 PG42 16 PG48 16
See also Threaded pipe
References