EN ISO 21049:2004
(Main)Pumps - Shaft sealing systems for centrifugal and rotary pumps (ISO 21049:2004)
Pumps - Shaft sealing systems for centrifugal and rotary pumps (ISO 21049:2004)
ISO 21049:2004 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).
ISO 21049:2004 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 ISO 21049:2004 into categories, types, arrangements and orientations is provided.
Pumpen - Wellendichtungssysteme für Kreiselpumpen und rotierende Verdrängerpumpen (ISO 21049:2004)
Pompes - Dispositifs d'étanchéité de l'arbre pour pompes centrifuges et rotatives (ISO 21049:2004)
L'ISO 21049:2003 spécifie des exigences et fournit des recommandations applicables aux dispositifs d'étanchéité pour des pompes centrifuges et rotatives utilisées dans les industries du pétrole, du gaz naturel et de la chimie. Elle est applicable principalement aux services dangereux, inflammables et/ou toxiques pour lesquels un degré de fiabilité plus important est requis afin de permettre d'améliorer la disponibilité des équipements et de réduire les émissions dans l'atmosphère ainsi que le coût du cycle de vie des dispositifs d'étanchéité. Elle couvre des dispositifs d'étanchéité pour des diamètres d'arbre compris entre 20 mm (0,75 in) et 110 mm (4,3 in).
L'ISO 21049:2003 est applicable également aux pièces de rechange des dispositifs d'étanchéité et peut être citée en tant que référence normative dans le cadre de rénovations d'équipements existants. Un système de classification est fourni, permettant de classer en catégories, types et dispositions les configurations des garnitures couvertes par l'ISO 21049:2003.
Črpalke - Sistemi grednih tesnilk za centrifugalne in rotacijske črpalke (ISO 21049:2004)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2005
ýUSDONH6LVWHPLJUHGQLKWHVQLON]DFHQWULIXJDOQHLQURWDFLMVNHþUSDONH ,62
Pumps - Shaft sealing systems for centrifugal and rotary pumps (ISO 21049:2004)
Pumpen - Wellendichtungssysteme für Kreiselpumpen und rotierende
Verdrängerpumpen (ISO 21049:2004)
Pompes - Dispositifs d'étanchéité de l'arbre pour pompes centrifuges et rotatives (ISO
21049:2004)
Ta slovenski standard je istoveten z: EN ISO 21049:2004
ICS:
21.140 Tesnilke, mašilke Seals, glands
23.080 ýUSDONH Pumps
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 21049
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2004
ICS 23.100.60; 23.080; 83.140.50
English version
Pumps - Shaft sealing systems for centrifugal and rotary pumps
(ISO 21049:2004)
Pompes - Dispositifs d'étanchéité de l'arbre pour pompes Pumpen - Wellendichtungssysteme für Kreiselpumpen und
centrifuges et rotatives (ISO 21049:2004) rotierende Verdrängerpumpen (ISO 21049:2004)
This European Standard was approved by CEN on 21 December 2004.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21049:2004: E
worldwide for CEN national Members.
Foreword
The text of ISO 21049:2004 has been prepared by Technical Committee ISO/TC 115 "Pumps" of
the International Organization for Standardization (ISO) and has been taken over as EN ISO
21049:2004 by Technical Committee CEN/TC 12 "Materials, equipment and offshore structures
for petroleum and natural gas industries" the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by June 2005, and conflicting national
standards shall be withdrawn at the latest by June 2005.
NOTE Attention is drawn to the fact that Clause 10.2.3 permits the use of alternative standards
(e.g. EN 13445-5) for the non-destructive examination of materials
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 21049:2004 has been approved by CEN as EN ISO 21049:2004 without any
modifications.
ISO 21049:2004(E)
RECOMMENDED SEAL SELECTION PROCEDURE (US CUSTOMARY UNITS)
SHEET 1 OF 10
ISO 21049:2004(E)
RECOMMENDED SEAL SELECTION PROCEDURE (US CUSTOMARY UNITS)
SEAL CATEGORY, TYPE, AND ARRANGEMENT SUMMARY
SHEET 2 OF 10
Seal category shall be Category 1, 2 or 3 as specified.
The major features of each category are summarized below. Options, where they exist for each feature, are
listed in the text as “if specified”. Clause numbers in parentheses indicate where the requirements are
specified.
FEATURE CATEGORY 1 CATEGORY 2 CATEGORY 3
Seal chamber size. ISO 3069 Type C, ISO 13709. ISO 13709.
(4.1.2) ASME B73.1 and
ASME B73.2.
Temperature range. – 40 °F to 500 °F – 40 °F to 750 °F – 40 °F to 750 °F
(4.1.2)
Pressure range, absolute. 315 psi 615 psi 615 psi
(4.1.2)
Face materials. Premium blister-resistant Premium blister-resistant Premium blister-resistant
(6.1.6.2) carbon vs. self-sintered carbon vs. reaction-bonded carbon vs. reaction-bonded
silicon carbide. silicon carbide. silicon carbide.
Distributed inlet flush When required per 6.1.2.14 When required per 6.1.2.14 Required.
requirements, or if specified. or if specified. (6.2.3.2)
Arrangements 1 and 2 with (6.2.1.2.1) (6.2.2.2.1)
rotating flexible elements.
Gland plate metal-to-metal Required. Required inside and outside Required inside and outside
contact requirement. (6.2.1.2.2) of the bolt circle diameter. of the bolt circle diameter.
(6.2.2.2.2) (6.2.2.2.2)
Cartridge seal sleeve size None 10 mm increments. 10 mm increments.
increments required. (6.2.2.3.1) (6.2.2.3.1)
Throttle bushing design Fixed carbon. Floating Fixed, non-sparking metal. Floating carbon.
requirement for carbon option. Floating carbon option.
Arrangement 1 seals. (7.1.2.2) (7.1.2.2)
(7.1.2.1)
Dual-seal circulation device If specified. If specified. Required.
head flow curve provided. (8.6.2.2) (8.6.2.2) (8.6.2.2)
Scope of vendor qualification Test as Category 1 unless Test as Category 2 unless Test as Category 3, entire
test. faces interchangeable with faces interchangeable with seal assembly as a unit.
Category 3. Category 3. (10.3.1.2.2)
(10.3.1.2.3) (10.3.1.2.3)
Proposal data requirements. Minimal. Minimal. Rigorous, including
(11.2.1) (11.2.1) qualification test results.
(11.2.1)
Contract data requirements. Minimal. Minimal. Rigorous.
(11.3.1) (11.3.1) (11.3.1)
104 © ISO 2004 – All rights reserved
ISO 21049:2004(E)
SHEET 2 OF 10 (continued)
Seal type shall be Type A, B, or C as specified.
The major features of each type are summarized below. Options, where they exist for each feature, are listed
in the text as “if specified”. Clause numbers in parentheses indicate where the requirements are specified.
FEATURE TYPE A TYPE B TYPE C
Standard temperature – 40 °F to 350 °F – 40 °F to 350 °F – 40 °F to 750 °F
application range.
(4.1.3)
Hydraulic balance Balanced (e.g. hydraulic Balanced (e.g. hydraulic Balanced (e.g. hydraulic
requirement. balance less than 1). balance less than 1). balance less than 1).
(4.1.3 and 6.1.1.7)
Mounting requirement. Inside the seal chamber. Inside the seal chamber. Inside the seal chamber.
(4.1.3)
Cartridge requirement. Cartridge design. Cartridge design. Cartridge design.
(4.1.3 and 6.1.1.1)
Flexible element style. Pusher (e.g. sliding Non-pusher (e.g. bellows). Non-pusher (e.g. bellows).
(4.1.3) elastomer).
Flexible element orientation. Rotating. Rotating. Stationary.
(4.1.3) Stationary option. Stationary option. Rotating option.
(6.1.1.2) (6.1.1.2) (6.1.1.3)
Bellows material. Not applicable. Alloy C-276 Alloy 718
(6.1.6.6)
Spring type. Multiple-coil springs. Single bellows. Single bellows.
(4.1.3) Single spring option.
(6.1.5.1)
Limit for stationary element 4 500 ft/min 4 500 ft/min 4 500 ft/min
application.
(6.1.1.5)
Secondary sealing element Elastomer. Elastomer. Flexible graphite.
material.
(4.1.3)
ISO 21049:2004(E)
SHEET 2 OF 10 (continued)
Seal arrangement shall be Arrangement 1, 2, or 3 as specified.
The major features of each arrangement are summarized below. Options, where they exist for each feature,
are listed in the text as “if specified”. Clause numbers in parentheses indicate where the requirements are
specified.
FEATURE ARRANGEMENT 1 ARRANGEMENT 2 ARRANGEMENT 3
Number of “seals” per One Two Two
cartridge, see definition of (3.2 and 4.1.4) (3.3 and 4.1.4) (3.4 and 4.1.4)
“seal” in 3.61. (4.1.4)
Uses a barrier or buffer fluid. No Sometimes but not required. Yes, barrier fluid required,
(4.1.4) Liquid or gas buffer liquid or gas permitted.
permitted.
Allows non-contacting (wet No Yes, Figure 4. Yes, Figure 6.
or dry) seals. (4.1.4)
Arrangement 1 throttle Category 1: Fixed carbon. Not applicable. Not applicable.
bushing requirement. Category 2: Fixed, non-
(7.1.2.1) sparking metallic.
Category 3: Floating carbon.
Arrangements 2 & 3 throttle Not applicable. Fixed carbon, if specified. Fixed carbon, if specified.
bushing requirement. (7.2.3) (7.3.3.1)
Arrangement 2 containment Not applicable. Required with dry-running Not applicable.
seal chamber bushing containment seal regardless
requirement. of inner seal design. (7.2.5.1
and 7.2.6.1)
Tangential buffer/barrier fluid Not applicable. If specified, for Categories 1 If specified, for Categories 1
outlet required ? and 2. Required for and 2. Required for
Category 3. (7.2.4.2) Category 3. (7.3.4.3)
Maximum buffer/barrier fluid Not applicable. 15 °F aqueous or diesel, 15 °F aqueous or diesel,
temperature rise. 30 °F mineral oils. (7.2.4.1) 30 °F mineral oils. (7.3.4.1)
Seal chamber pressure/flush Minimum margin of 30 % of Minimum margin of 30 % of None
design requirement. seal chamber pressure seal chamber pressure
(6.1.2.14) above fluid vapour pressure above fluid vapour pressure
or 36 °F margin. or 36 °F margin.
Minimum operating seal 5 psi above atmospheric. 5 psi above atmospheric. None
chamber pressure
requirement. (6.1.2.14)
Minimum gland plate See Table 1. See Table 1. See Table 1.
connection sizes and
orientation.
Minimum barrier/buffer fluid Not applicable. 3 U.S. gal for shaft diameter 3 U.S. gal for shaft diameter
liquid reservoir. 2,5 in and smaller; otherwise 2,5 in and smaller; otherwise
5 U.S. gal [8.5.4.3 a)] 5 U.S. gal [8.5.4.3 a)]
Test requirements. (10.3.1.2.8) (10.3.1.2.9) and (10.3.1.2.11) and
(10.3.1.2.10) (10.3.1.2.12)
106 © ISO 2004 – All rights reserved
ISO 21049:2004(E)
RECOMMENDED SEAL SELECTION PROCEDURE (US CUSTOMARY UNITS)
SHEET 3 OF 10
Non-hydrocarbon services
Operating conditions, recommended seal types and special features
Fluids 1 2 3 4 5 6 7 8
a
Water Water Water Sour Sour Caustic, Caustic, Acids
water water amines amines H SO ,
2 4
crystallize crystallize H PO
3 4
Pumping < 180 < 180 > 180 < 180 < 180 < 180 < 180 < 180
temp., °F
Seal < 300 < 300 < 300 < 300 < 300
chamber
gauge
pressure,
psig
Category 1
seals
Seal < 300 300 to 600 < 600 < 300 300 to 600 < 300 300 to 600 < 300
chamber
gauge
pressure,
psig
Category 2
and 3 seals
Standard Type A Type A Type A Type A Type A Type A Type A Type A
seal type
b b b b
Options Type B ES ES Type B ES Type B ES Type B
when Type C Type C Type C Type C
specified
Required Circulating Perfluoro- Perfluoro- Amine- Amine- Perfluoro-
special device elastomer elastomer resistant resistant elastomer
features perfluoro- perfluoro- and single
elastomer elastomer spring for
Type A
seals
Special Abrasive Hardface Hardface Hardface Hardface Hardface Hardface Hardface Hardface
features particulates vs vs vs vs vs vs vs vs
for hardface hardface hardface hardface hardface hardface hardface hardface
contami-
c
nants
This selection procedure chooses seal designs consistent with the default positions throughout this International Standard. Listed
options meeting this International Standard might perform equally well.
a
Up to 20 % H SO at 77 °F only. Up to 20 % H PO at 176 °F only. All other acids, including hydrofluoric acid, fuming nitric acid and hydrochloric acid
2 4 3 4
require special engineering agreed between purchaser and vendor.
b
Totally engineered sealing system. Consult vendor to ensure special design considerations are accounted for.
c
Special features listed apply only in mixtures having pH between 4 and 11.
ISO 21049:2004(E)
RECOMMENDED SEAL SELECTION PROCEDURE (US CUSTOMARY UNITS)
SHEET 4 OF 10
Non-flashing hydrocarbons
Operating conditions, recommended seal types and special features
Fluids 1 2 3 4 5 6 7 8
Pumping – 40 to 20 – 40 to 20 20 to 350 20 to 350 350 to 500 350 to 500 500 to 750 500 to 750
temp., °F
Seal < 300 < 300 < 300 N/A N/A
chamber
gauge
pressure,
psig
Category 1
seals
Seal < 300 300 to 600 < 300 300 to 600 < 300 300 to 600 < 300 300 to 600
chamber
gauge
pressure,
psig
Category 2
and 3 seals
a a
Standard Type A Type A Type A Type A Type C ES Type C ES
seal type
a, b a, b a a
Option when Type B ES Type B ES ES ES
specified
Option when Type C Type C
specified
Required Nitrile Nitrile
special O-rings O-rings
features
Special Caustic Perfluoro- Perfluoro-
features elastomer elastomer
for
Abrasive Hardface Hardface Hardface Hardface Hardface Hardface Hardface Hardface
contami-
c particulates vs vs vs vs vs vs vs vs
nants
hardface hardface hardface hardface hardface hardface hardface hardface
Aromatics Perfluoro- Perfluoro-
and/or H S elastomer elastomer
Amines Amine- Amine-
resistant resistant
perfluoro- perfluoro-
elastomer elastomer
This selection procedure chooses seal designs consistent with the default positions throughout this International Standard. Listed
options meeting this International Standard might perform equally well.
a
Totally engineered sealing system. Consult vendor to ensure special design considerations are accounted for.
b
Engineered (high pressure) bellows.
c
Special features listed apply only in mixtures having pH between 4 and 11.
108 © ISO 2004 – All rights reserved
ISO 21049:2004(E)
RECOMMENDED SEAL TYPE SELECTION PROCEDURE (US CUSTOMARY UNITS)
SHEET 5 OF 10
Flashing hydrocarbons
Operating conditions, reco
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.