ISO 6554:1980
(Main)Flanged automatic steam traps - Face-to-face dimensions
Flanged automatic steam traps - Face-to-face dimensions
Specifies dimensions for a range of steam traps used in flanged pipe systems, and gives definitions. The six basic series of dimensions for flanged steam traps, expressed in millimetres, are given in a table for the nominal sizes ranging from DN 15 to DN 50 inclusive, and for pressures to PN 40 inclusive.
Purgeurs automatiques de vapeur d'eau, à brides — Dimensions face-à-face
La présente Norme internationale fixe les dimensions face-à-face d'une gamme de purgeurs automatiques de vapeur d'eau utilisés dans les tuyauteries à brides.
General Information
- Status
- Published
- Publication Date
- 31-May-1980
- Technical Committee
- ISO/TC 153 - Valves
- Drafting Committee
- ISO/TC 153 - Valves
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 06-Sep-2024
- Completion Date
- 13-Dec-2025
Overview
ISO 6554:1980 - Flanged automatic steam traps - Face-to-face dimensions defines standardized face-to-face dimensions for flanged automatic steam traps used in industrial steam piping. The standard covers nominal sizes from DN 15 to DN 50 (with DN 32 retained provisionally) and applies to pressures up to PN 40. It specifies the distance between the two end planes of the trap body (expressed in millimetres) and provides six basic series of face-to-face dimensions in a tabulated form. ISO 6554 applies to the trap body itself and does not cover entire installed assemblies or accessories.
Key topics and requirements
- Face-to-face dimension: the axial distance between the two planes perpendicular to the trap axis at the body end ports (given in mm).
- Nominal size (DN): designation common across piping components (see ISO 6708 for DN definition); ISO 6554 uses DN 15–DN 50 as its scope.
- Six basic dimension series: the standard provides six series of face-to-face lengths to support a range of designs; two of these series are retained only for existing models.
- Pressure rating applicability: dimensions are specified for traps intended for use in systems up to PN 40.
- Scope limitation: applies only to the steam trap components themselves - not to flanges, gaskets, or the entire assembly in-line with the trap.
Practical applications
ISO 6554 is valuable for professionals who need consistent, interchangeable dimensions for flanged steam traps:
- Valve and steam trap manufacturers - to design products that fit standardized piping layouts and are interchangeable with competing products.
- Piping and mechanical engineers - to specify correct trap face-to-face dimensions in engineering drawings and BOMs for steam systems.
- Procurement and maintenance teams - to source replacement traps that fit existing flange spacing without modification.
- Plant designers and contractors - to ensure compatibility of traps with flange patterns and to avoid rework during installation.
By using ISO 6554 dimensions, organizations reduce installation issues, simplify spare-part stocking, and improve interoperability across suppliers.
Related standards
- ISO 6708 - Numerical designation of sizes (DN)
- Work developed under ISO/TC 153 - General purpose industrial valves
Keywords: ISO 6554, flanged automatic steam traps, face-to-face dimensions, DN 15 to DN 50, PN 40, steam trap dimensions, piping standards, valve interchangeability.
ISO 6554:1980 - Flanged automatic steam traps -- Face-to-face dimensions
ISO 6554:1980 - Purgeurs automatiques de vapeur d'eau, a brides -- Dimensions face-a-face
ISO 6554:1980 - Purgeurs automatiques de vapeur d'eau, a brides -- Dimensions face-a-face
Frequently Asked Questions
ISO 6554:1980 is a standard published by the International Organization for Standardization (ISO). Its full title is "Flanged automatic steam traps - Face-to-face dimensions". This standard covers: Specifies dimensions for a range of steam traps used in flanged pipe systems, and gives definitions. The six basic series of dimensions for flanged steam traps, expressed in millimetres, are given in a table for the nominal sizes ranging from DN 15 to DN 50 inclusive, and for pressures to PN 40 inclusive.
Specifies dimensions for a range of steam traps used in flanged pipe systems, and gives definitions. The six basic series of dimensions for flanged steam traps, expressed in millimetres, are given in a table for the nominal sizes ranging from DN 15 to DN 50 inclusive, and for pressures to PN 40 inclusive.
ISO 6554:1980 is classified under the following ICS (International Classification for Standards) categories: 23.060.01 - Valves in general. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 6554:1980 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWvlEXAYHAPOAHAR OPl-AHM3Al.&lR fl0 CTAH~APTH3AWWWORGANISATION INTERNATIONALE DE NORMALISATION
Flanged autbmatic steam traps - Face-to-face dimensions
furgeurs automatigues de vapeur d’eau, h brides - Dimensions face-h-face
First edition - 1980-06-15
UDC 621.186.6 Ref. No. ISO 6554-1980 EI
Descriptors : safety valves, flanged valves, steam, traps, dimensions.
Price based on 1 page
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards institutes (ISO member bedies). The work of developing Inter-
national Standards is carried out through ISO technical committees. Every member
body interested in a subject for which a technical committee has been set up has the
right to be represented on that committee. International organizations, governmental
and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 6554 was developed by Technical Committee ISO/TC 153,
General purpose industrial valves, and was circulated to the member bodies in
Wlarch 1979.
lt has been approved by the member bedies of the following countries :
Germany, F. R. South Africa, Rep. of
Australia
Belgium India Sweden
Italy Switzerland
Brazil
Canada Kores, Rep. of United Kingdom
USA
Chile Netherlands
Norway USSR
Denmark
Finland Poland
Romanie
France
The member bodies of the following countries expressed disapproval of the document
on technical grounds :
Czechoslovakia
Japan
0 International Organkation for Standardkation,
...
Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MElKJlYHAPO,QHAR OP~AHM3AiJMl n0 CTAH~APTH3Al&lM~RGANISATION INTERNATIONALE DE NORMALISATION
Purgeurs automatiques de vapeur d’eau, à brides -
Dimensions face-à-face
Flanged automatic steam traps- Face-to-face dimensions
Première édition - 1980-06-15
CDU 621.186.6 Réf. no : ISO 65544980 (FI
EL
Y
A
Descripteurs : soupape de sécurité, robinet à bride, vapeur d’eau sous pression, purgeur, dimension.
i#
Prix basé sur 1 page
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 6554 a été élaborée par le comité technique ISO/TC 153,
Robinetterie industrielle pour les usages courants, et a été soumise aux comités mem-
bres en mars 1979.
Les comités membres des pays suivants l’ont approuvée :
Afrique du Sud, Rép. d’ Danemark Roumanie
Allemagne, R. F. Finlande Royaume-Uni
Australie Suède
France
Belgique Inde Suisse
Brésil
Italie URSS
Canada Norvège USA
Chili
Pays-Bas
Corée, Rép. de
Pologne
Les comités membres des suivants l’ont désapprouvée pour des raisons
Pays
techniques :
Japon
Tchécoslovaquie
0 Organisation internationale de normalisation, 1980
Imprimé en Suisse
------
...
Norme internationale
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MElKJlYHAPO,QHAR OP~AHM3AiJMl n0 CTAH~APTH3Al&lM~RGANISATION INTERNATIONALE DE NORMALISATION
Purgeurs automatiques de vapeur d’eau, à brides -
Dimensions face-à-face
Flanged automatic steam traps- Face-to-face dimensions
Première édition - 1980-06-15
CDU 621.186.6 Réf. no : ISO 65544980 (FI
EL
Y
A
Descripteurs : soupape de sécurité, robinet à bride, vapeur d’eau sous pression, purgeur, dimension.
i#
Prix basé sur 1 page
Avant-propos
L’ISO (Organisation internationale de normalisation) est une fédération mondiale
d’organismes nationaux de normalisation (comités membres de I’ISO). L’élaboration
des Normes internationales est confiée aux comités techniques de I’ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
correspondant. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec I’ISO, participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I’ISO.
La Norme internationale ISO 6554 a été élaborée par le comité technique ISO/TC 153,
Robinetterie industrielle pour les usages courants, et a été soumise aux comités mem-
bres en mars 1979.
Les comités membres des pays suivants l’ont approuvée :
Afrique du Sud, Rép. d’ Danemark Roumanie
Allemagne, R. F. Finlande Royaume-Uni
Australie Suède
France
Belgique Inde Suisse
Brésil
Italie URSS
Canada Norvège USA
Chili
Pays-Bas
Corée, Rép. de
Pologne
Les comités membres des suivants l’ont désapprouvée pour des raisons
Pays
techniques :
Japon
Tchécoslovaquie
0 Organisation internationale de normalisation, 1980
Imprimé en Suisse
------
...
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