The provisions of this standard pressure divided into PN tag and the Class tag tag.
PN mark with 12 classes
Respectively: PN2.5; PN6; PN10; PN16. PN25; PN40; PN63; PN100; PN160; PN250; PN320; PN400
Class tag has six classes
Respectively: the Class of 150; The Class of 300; The Class of 600; The Class of 900; The Class of 1500; The Class of 2500
Usage: widely used in water conservancy, electric power, power station, pipe fittings, industrial, pressure vessel etc
