THREAD STANDARD OF MALLEABLE IRON PIPE FITTINGS

For all over the world, different countries requires different standard of thread for malleable iron pipe fittings.

The main catagery is BSPT, NPT, DIN, and RUSSIA STANDARD    .

BSPT means british standard, many countries use it.

NPT  means american standard, also used a lot all over the world.

DIN is German standard, which is not used a lot.

Russia standard is only used in some Russia countries.