BS ISO 7121:2006

Steel ball valves for general-purpose industrial applications

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This International Standard specifies the requirements for a series of steel ball valves suitable for general-purpose industrial applications.

It covers valves of the nominal sizes (see ISO 6708 and ASME B16.34)

— DN 8, 10, 15, 20, 25, 32, 40, 50, 65, 80, 100, 150, 200, 250, 300, 350, 400, 450, 500 (NPS 1/4, 3/8, 1/2, 3/4, 1, 11/4, 11/2, 2, 21/2, 3, 4, 6, 8, 10, 12, 14, 16, 18 and 20),

and is applicable to the following pressure designations (see ISO 7268 or EN 1333, and ASME B16.34):

It includes provisions for valve characteristics as follows ¹⁾:

— flanged and butt-welded ends in sizes 15 ≤ DN ≤ 500 (1/2 ≤ NPS ≤ 20);
— socket welding ends in sizes 8 ≤ DN ≤ 100 (1/4 ≤ NPS ≤ 4);
— threaded ends in sizes 8 ≤ DN ≤ 50 (1/4 ≤ NPS ≤ 2);
— body seat openings designated as full bore, reduced bore, and double reduced bore;
— materials;
— testing and inspection.

Product Details

Descriptors

Temperature

Pressure

Industrial

Plug valves

Valve bodies

Screwed fittings

Inspection

Welded fittings

Steels

Valves

Test methods

Ratings

Design

Dimensions

Ball valves

Flanged fittings

Size

Marking

ICS Codes

23.060.20 Ball and plug valves

Committee

PSE/18/3

International relationships

Identical to:

ISO 7121:2006

ISBN

978 0 580 50699 4

Publisher

BSI