scope:

This International Standard specifies the requirements for a series of metal ball valves suitable for petroleum, petrochemical, natural gas plants, and related industrial applications.

It covers valves of the nominal sizes DN

- 8; 10; 15; 20; 25; 32; 40; 50; 65; 80; 100; 150; 200; 250; 300; 350; 400; 450; 500

corresponding to nominal pipe sizes NPS 

- ¼; ⅜; ½; ¾; 1; 1¼; 1½; 2; 2½; 3; 4; 6; 8; 10; 12; 14; 16; 18; 20;

and applies for pressure designations

- Class 150; 300; 600; 800 (Class 800 applies only for valves with reduced bore and with threaded and socket welding end);

- PN 16; 25; 40.

It includes provisions for testing and inspection and for valve characteristics as follows:

- flanged and butt-welded ends, in sizes 15 u DN u 500 (½ u NPS u 20);

- socket welding and threaded ends, in sizes 8 u DN u 50 (¼ u NPS u 2);

- body seat openings designated as full bore, reduced bore and double reduced bore;

- materials.