BSI British Standards
Specificationfor flanges andboltingforpipes valves andfittings
BSI 2009
ISBN 978 0 580 61296 1
ICS 23.040.60
Publication history
Publishing and copyright information
Amendments issued since publication
The BSI copyright notice displayed in this document indicates when the document was last issued.
The following BSI references relate to the work on this standardl:Committee reference PSE/15 Draft for ment 08/ DC
First published as BS 10-1:1947 BS 10-2:1926 BS 10-3:1929 BS 10-4:1931 and BS 10-5:1932First published as BS 10 December 1962Second (present) edlition April 2009
Text affected
Contents
Foreword ii2 Scope1 Normative references 13 Design temperature and pressure 24 5 Flange dimensions 2 Designation 26 7 Flange materials 3 Attachment of flanges 48 Hydraulic testing of flange joints 49 10 Certification4 Low temperature flanges and bolting 6
Annexes
Annex A (informative) Information to be supplied by the purchaser 33Annex B (informative) Minimum requirements of steel to be used forflanges in Table A to Table H34 Annex C(normative) Bolts and nuts 37
Bibliography41
List of figures
Figure 2 Application diagram for bolts and stud-bolts: carbon Figure 1 - Shaped stud bolt (see C.4) 25and flanges 26 Figure 3 Steel or copper alloy plain flange 28Figure 4-Steel boss flange 29Figure 5 Integrally forged or cast steel flange for valves only 30 Figure 6 - Steel welding neck flange (see Table D to Table T) 31Figure 7 Integrally cast iron flanges (see Table F and Table H) 32
List of tables
Table 2 Temperature/pressure ratings for carbon steel flangesTableDimensions of plain boss integrally cast orforged flanges [see Annex B]5(for ratings see Table 2 and Annex B) 7Table D imensions of plain boss integrally cast orforged and welding neck flanges (for ratings see Table 2 and Annex B)9Table E Dimensions of plain boss integrally cast or forged andTableFimensions f plinboss integrally cast rorged and welding neck flanges (for ratings see Table 2 and Annex B) 12welding neck flanges (for ratings see Table 2 and Annex B)14 Table H Dimensions of plain boss integrally cast or forged and9(g xauu pue aqe assue) sbue xau buawelding neck flanges (for ratings see Table 2 and Annex B)18 Table J Dimensions of plain boss integrally cast or forged andTable K Dimensions of plain integrally cast or forged and welding neck flanges (for ratings see Table 2 and Annex B)19Table R Dimensions of plain integrally cast or forged and welding (g xauu pue aqe as sue o) saue xau TableSDimensionsof plainintegrallycastorforged and weldingneck flanges (for ratings see Table 2 and Annex B) 22TableT Dimensions of plain integrally cast orforged and welding ( x ee as s o) saue auTable B.1 - Grey cast iron properties 34Table B.2 Temperature/pressure ratings for grey cast iron and malleable cast iron flanges [see Clauses 5g) and 5h)] 35
Table B.3 - Temperature/pressure ratings for copper alloy flangesTable B.4 Temperature/pressure ratings for copper alloy flanges sizes % in to 3 in (inclusive) [see Clause 5j)]35sizes over 3 in [see Clause 5f)] 36 Table C.1 Application of bolts and stud-bolts [see Figure 2a)and Figure 2b)] 37Table C.2 Materials dimensions and finish of bolts stud-bolts and nuts39
Foreword
Publishing information
Supersession
Informationabout thisdocument
Materials have been updated;
Review of tables:
Presentationalconventions
Contractual andlegal considerations
This British Standard is published by BSl and came into effect on30 April 2009. It was prepared by Technical Committee PSE/15 obtained on request to its secretary. Flanges. A list of organizations represented on this mittee can be
This British Standard supersedes BS 10:1962 which is withdrawn.
It should be noted that apart from cast iron flanges the hydraulic testpressure applied to a flange joint is limited to one-and-a-half timesthe highest rated pressure of the flange (see Clause 8).
This is a fullrevision of the standard and introduces the followingprincipal changes:
●The standard has been re-arranged to reflect the most mon used materials and types in service;
BS 10 flanges have been in use since 1904 and have beentemperaturerequirements.At the time of this revision flangejoints with carbon steel pipe flanges for high temperatures andpressures to the British Standard tables have been in service throughout the world for periods equal to the economic lifeof primary plant. The tables have therefore remained in thestandard for guidance.
NOTEWhen it is required to convert the figures in this standard fromimperial units into metric units it is remended that the conversionfactors and the table of conversion contained in BS 350 *Conversion factors and tables" be used. Attention is also drawn to BS 2856 (Use 1 in = 25 mm when converting to metric dimensions.)
The provisions of this standard are presented in roman (i.e. upright)principal auxiliary verb is “shall*.
type. Its requirements are expressed in sentences in which the
Commentary explanation and general informative materialis presentedin smaller italic type and does not constitute a normative element.
This publication does not purport to include allthe necessary provisionsof a contract. Users are responsible forits correct application.
Compliance with a British Standard cannot confer immunity from legal obligations.
