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I.S. EN ISO 21049:2005

Current
Current

The latest, up-to-date edition.

PUMPS - SHAFT SEALING SYSTEMS FOR CENTRIFUGAL AND ROTARY PUMPS
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

01-01-2005

Preview

For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.

Only cited Standards give presumption of conformance to New Approach Directives/Regulations.

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Sealing systems
   4.1 Seal categories, types and arrangements
        4.1.1 General
        4.1.2 Seal categories
        4.1.3 Seal types
        4.1.4 Seal arrangements
        4.1.5 Seal orientations
   4.2 Objectives
   4.3 Specifying and/or purchasing a sealing system
5 General
   5.1 Unit responsibility
   5.2 Dimensions
6 Design requirements
   6.1 Common design requirements (all categories)
        6.1.1 General information
        6.1.2 Seal chamber and gland plate
        6.1.3 Cartridge seal sleeves
        6.1.4 Mating rings
        6.1.5 Flexible elements
        6.1.6 Materials
   6.2 Design requirements (category-specific)
        6.2.1 Category 1 seals
        6.2.2 Category 2 seals
        6.2.3 Category 3 seals
7 Specific seal configurations
   7.1 Arrangement 1 seals
        7.1.1 Seal sleeves
        7.1.2 Seal chamber and gland plate
   7.2 Arrangement 2 seals
        7.2.1 General
        7.2.2 Seal sleeves
        7.2.3 Seal chamber and gland plates
        7.2.4 Contacting wet seals with a liquid buffer
               fluid (2CW-CW)
        7.2.5 Seal chamber and gland plates for contacting
               wet inner seal with a dry-running containment
               seal (2CW-CS)
        7.2.6 Seal chamber and gland plates for non-contacting
               inner seal with a dry-running containment seal
               (2NC-CS)
   7.3 Arrangement 3 seals
        7.3.1 General
        7.3.2 Seal sleeves
        7.3.3 Seal chamber and gland plates
        7.3.4 Contacting wet seal configurations with a liquid
               barrier fluid (3CW-FB, 3CW-FF, 3CW-BB)
        7.3.5 Standard seal types and arrangements for
               non-contacting seal configurations with a gas
               barrier fluid (3NC-FB, 3NC-FF, 3NC-BB)
8 Accessories
   8.1 Auxiliary piping systems
   8.2 Mechanical seal flush/cooling systems (Group I)
   8.3 Quench systems (Group II)
   8.4 Cooling-water systems (Group III)
   8.5 Accessories and auxiliary system components
        8.5.1 Cyclone separator
        8.5.2 Flow control orifice
        8.5.3 Seal flush coolers
        8.5.4 Barrier/buffer fluid reservoirs
        8.5.5 Barrier/buffer-fluid selection criteria
   8.6 Barrier/buffer fluid and seal flush positive-circulating
        devices
        8.6.1 General
        8.6.2 Internal circulating device
        8.6.3 External circulating pump
        8.6.4 External seal flush systems
        8.6.5 Condensate collection reservoir
        8.6.6 Barrier/buffer-gas supply systems
9 Instrumentation
   9.1 General
   9.2 Temperature-indicating gauges
   9.3 Thermowells
   9.4 Pressure gauges
   9.5 Switches
        9.5.1 Alarm, trip and control switches
        9.5.2 Pressure switches
        9.5.3 Level switches
        9.5.4 Flow switches
   9.6 Level indicators
   9.7 Flow instruments
        9.7.1 Flow indicators
        9.7.2 Flow meters
        9.7.3 Flow transmitters
   9.8 Relief valves
   9.9 Regulators
   9.10 Pressure amplifiers
10 Inspection, testing and preparation for shipment
   10.1 General
   10.2 Inspection
   10.3 Testing
        10.3.1 Seal qualification testing
        10.3.2 Hydrostatic test for pressure-containing
               mechanical seal parts and accessories
        10.3.3 Test of job seal by seal manufacturer
        10.3.4 Air test
        10.3.5 Test of job seal by pump manufacturer
   10.4 Preparation for shipment
11 Data transfer
   11.1 General
   11.2 Proposal data
   11.3 Contract data
Annex A (informative) Recommended seal selection procedure
Annex B (informative) Typical materials standards for seal
                      chamber and mechanical seal components
Annex C (normative) Mechanical seal data sheets
Annex D (informative) Mechanical seal codes
Annex E (normative) Seal and pump vendor interface
                      responsibilities
Annex F (informative) Heat generation and heat soak
                      calculations
Annex G (normative) Standard flush plans and auxiliary
                      hardware
Annex H (informative) Inspector checklist for all seals
Annex I (normative) Form for mechanical seal qualification
                      test
Annex J (normative) Mechanical seals data requirements form
Bibliography

Provides requirements and gives recommendations for sealing systems for centrifugal and rotary pumps used in the petroleum, natural gas and chemical industries.

DocumentType
Standard
Pages
114
PublisherName
National Standards Authority of Ireland
Status
Current

Standards Relationship
UNI EN ISO 21049 : 2005 Identical
DIN EN ISO 21049:2010-03 (Draft) Identical
ISO 21049:2004 Identical
UNE-EN ISO 21049:2006 Identical
BS EN ISO 21049:2004 Identical
EN ISO 21049:2004 Identical

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