JAPANESE INDUSTRIAL STANDARD
Translated and Published byJapanese Standards Association
JIS B 2404:2006
(JSME/JSA)
Dimensionsofgasketsforusewith pipe flanges
Printed in Japan
Foreword
This translation has been made based on the original JapaneseIndustrial Standard revised by the Minister of Economy Trade and Industry through deliberations at the Japanese Industrial StandardsCommittee as the result of proposal for revision of Japanese IndustrialStandard submitted by The Japan Society of Mechanical Engineers(JSME)/Japanese Standards Association (JSA) with the draft being attached based on the provision of Article 12 Clause 1 of the IndustrialStandardization Law applicable to the case of revision by the provisionof Article 14.
Consequently JIS B 2404 : 1999 is replaced with this Standard.
As for the flanges specified in the International Organization for Standardization (ISO) those originated from ASME Standards in USA(Class designation)and from DIN Standards in German (PNdesignation) are included however those originated from JIS Standards(K designation) are not included. Considering the necessity of specifying flanges of K designation by revising ISO standard pipe flange standardssuch as JIS B 2220 (Steel pipe flanges) JIS B 2239 (Cast iron pipeflanges) JIS B 2240 (Copper alloy pipe flanges) and JIS B 2241they will be proposed to ISO. (Aluminum alloy pipe flanges) are prepared on the assumption that
This Standard is prepared by revising JIS B 2404 :1999 on theassumption that the gasket standard will be also proposed to ISO inas well as JIS ofpipeflange are incorporated toISO Standard system. the case where the revision corresponding to the pipe flange standard
Attention is drawn to the possibilitythat some parts of this Standardmay conflict with a patent right application for a patent after openingto the public utility model right or application for registration of utilityrelevant Minister and the Japanese Industrial Standards Committee model after opening to the public which have technical properties. Theare not responsible for identifying the patent right application for apatent after opening to the public utility model right or applicationfor registration of utility model after opening to the public which have the said technical properties.
Contents
Introduction1 Scope2 Normative references3 Classification and form of gaskets ..4 Combination of flanges and gaskets .5 Dimension5.1 Non-metallic flat gasket... 55.2 5.3 Spiral wound gasket Polytetrafluoroethylene resin envelope gasket 5Annex 1 (informative) Dimensions of gaskets used for pipe flangesshown in Annex 6of JIS B 2220. -21Annex 2 (informative) Comparison table between JIS and correspondingInternational Standard- 30
Dimensionsofgasketsforuse withpipeflanges
Introduction This Japanese Industrial Standard has been prepared based on the firstedition of ISO 7483Dimensions of gaskets for use with flanges toISO 7005published in 1991 with some modifications of the technical contents.
A list of modifications with explanations is given in Annex 2 (informative).
This Standard specifies the dimensions of gaskets used for the pipe flanges hereafterreferred to as “flanges°) specified in the text of JIS B 2220 JIS B 2239 JIS B 2240 and JIS B 2241.
The dimensions of gaskets used for flanges specified in Annex 6 of JIS B 2220shall be shown in Annex 1 (informative).
material and thickness of gaskets it is preferable to take account of operating This Standard does not specify thematerial of gasket.For the selection of classification conditions properties of the gasket material joint facing form surface finish of theflange and flange bolt loading.
1 Seope This Standard specifies the classification and dimension of gaskets usedfor flanges(1) connected to the piping for fluids such as steam water and oil.
Note (') In this Standard flanges mean those specified in the following standards.
JIS B 2220 Steelpipe flangesJISB2240CopperalloypipeflangesJIS B2241Aluminiumalloypipeflanges
NOTE : The International Standard corresponding to this Standard is as follows.
the contents between the relevant International Standard and JIS are In addition symbols which denote the degree of correspondence inIDT (identical) MOD (modified) and NEQ (not equivalent) according toISO/IECGuide21.
ISO 7483:1991Dimensions of gaskets for use with flanges to ISO 7005(NEQ)
2Normative references The following standards contain provisions which through reference in this text constitute provisions of this Standard. The most recent editionsof the standards (including amendments) indicated below shall be applied.
JIS B2220 Steelpipe flangesJIS B 2239 Cast iron pipe flangesJIS B 2240Copper alloy pipe flanges
