ISO/DIS 21049 Pumps - Shaft-sealing systems for centrifugal and rotary Pumps

The International Organization for Standardization (ISO). This ISO document is a Draft International Standard. ISO/TC 115/SC
3. Voting begins on: 2010-03-25. Voting terminates on: 2010-08-25. This second edition cancels and replaces the first edition (ISO 21049:2004), which has been technically revised. 290p. This International Standard specifies requirements and gives recommendations for sealing systems for centrifugal and rotary pumps used in the petroleum, natural gas and chemical industries. It is applicable mainly for hazardous, flammable and/or toxic services where a greater degree of reliability is required for the improvement of equipment availability and the reduction of both emissions to the atmosphere and life-cycle sealing costs. It covers seals for pump shaft diameters from 20 mm (0,75 in) to 110 mm (4,3 in).