ISO 21049:2004
Pumps - Shaft sealing systems for centrifugal and rotary pumps

Standard No.

ISO 21049:2004

Release Date

2004

Published By

International Organization for Standardization (ISO)

Latest

ISO 21049:2004

Scope

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). This International Standard is also applicable to seal spare parts and can be referred to for the upgrading of existing equipment. A classification system for the seal configurations covered by this International Standard into categories, types, arrangements and orientations is provided.

ISO 21049:2004 Referenced Document

• API Std 526 
• ASME B1.1 Unified Inch Screw Threads (UN, UNR, and UNJ Thread Forms)*， 2020-06-30 Update
• ASME B1.20.1 Pipe Threads@ General Purpose (Inch)
• ASME B16.11 Forged Fittings, Socket-Welding and Threaded*， 2024-04-18 Update
• ASME B16.20 Metallic Gaskets for Pipe Flanges
• ASME B73.1 Specification for Horizontal End Suction Centrifugal Pumps for Chemical Process*， 2020-01-01 Update
• ASME B73.2 Specification for Vertical In-Line Centrifugal Pumps for Chemical Process*， 2016-01-01 Update
• ASME PTC 8.2 Centrifugal pumps
• ASME V NONDESTRUCTIVE EXAMINATION*， 2006-07-01 Update
• ASME VIII RULES FOR CONSTRUCTION OF PRESSURE VESSELS
• AWS D1.1 A Collection of Responses to Formal Inquiries about the Requirements of AWS D1.1 (1976-2008) (Second Edition)*， 2008-01-01 Update
• IEC 60529 Degrees of Protection Provided by Enclosures (IP Code) (Edition 2.1 ***Applies to French text only***)*， 2024-04-18 Update
• ISO 13709 Centrifugal pumps for petroleum, petrochemical and natural gas industries*， 2009-12-01 Update
• ISO 15649 Petroleum and natural gas industries - Piping
• ISO 261 ISO general purpose metric screw threads - General plan
• ISO 262 ISO general purpose metric screw threads — Selected sizes for bolts, screws, studs and nuts*， 2023-04-01 Update
• ISO 286-2 Geometrical product specifications (GPS) - ISO code system for tolerances on linear sizes - Part 2: Tables of standard tolerance classes and limit deviations for holes and shafts; Technical Corrigendum 1*， 2013-08-01 Update
• ISO 3069 End-suction centrifugal pumps - Dimensions of cavities for mechanical seals and for soft packing
• ISO 4200 Plain end steel tubes, welded and seamless; general tables of dimensions and masses per unit length
• ISO 7005-1 Pipe flanges - Part 1: Steel flanges for industrial and general service piping systems*， 2011-07-01 Update
• ISO 724 ISO general purpose metric screw threads — Basic dimensions*， 2023-04-01 Update
• NEMA 250 Enclosures for Electrical Equipment (1000 Volts Maximum)
• NFPA 70 National Electrical Code® Errata 70-23-4, Reference: 701.12(I) *， 2023-03-02 Update

ISO 21049:2004 history

• 2004 ISO 21049:2004 Pumps - Shaft sealing systems for centrifugal and rotary pumps