Thread type: Whitworth pipe thread

Whitworth Pipe Threads differ in sealing on the thread (acc. ISO 7/1 and DIN EN 10226) and not sealing on the thread (ISO 228).

The pipe thread types are not easy to understand at first glance. Thanks to our Whitworth pipe thread tables, you can get an overview here. A basic distinction is made between sealing and non-sealing connections. If you use non-sealing connections, you will need an additional sealant to reliably seal your pipe connection. You can easily recognize the differences in a clear table of Whitworth pipe thread types. All Whitworth pipe threads in the table have a flank angle of 55° and the dimensions are given in inches.

In order to create a thread-sealing connection, one of the two threads must be tapered. A mechanical seal is then created when the tapered and cylindrical threads meet. If, on the other hand, both the external and internal threads are cylindrical, the connection will not seal in the thread.

The first Whitworth pipe thread table deals with the G or BSP (British Standard Pipe) thread. This is the most commonly used pipe thread in Germany and you will therefore regularly encounter it in standard applications. This is a non-sealing connection, so both the external and internal threads are cylindrical. In the table for this Whitworth pipe thread, we have given you the outside diameter in inches, but also the corresponding value in mm. This saves you having to do the conversion. In addition to the number of threads per inch, which is standard for inch threads, you will also find the pitch in mm in the Whitworth pipe thread table.

In another Whitworth pipe thread table, you can see the variants for the metal-to-metal sealing connection. The most common case is the combination of cylindrical internal thread Rp and conical external thread R. The conical external thread R with the conical internal thread Rc is used less frequently. The Whitworth thread table for thread-sealing connections also contains the pitch in mm and the number of threads per inch. It also contains values for the outer diameter, flank diameter and core diameter. The Whitworth pipe thread table for sealing connections also contains important information on the tolerances of the thread standards, as these differ from those of the G pipe thread.