<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2006-07-25</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000892553</issuerCik>
        <issuerName>CHART INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>GTLS</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001202005</rptOwnerCik>
            <rptOwnerName>DAY TIMOTHY H</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O FIRST RESERVE CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>ONE LAFAYETTE PLACE, THIRD FLOOR</rptOwnerStreet2>
            <rptOwnerCity>GREENWICH</rptOwnerCity>
            <rptOwnerState>CT</rptOwnerState>
            <rptOwnerZipCode>06830</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                    <footnoteId id="F1"/>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See Footnote</value>
                    <footnoteId id="F1"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">The Reporting Person does not beneficially own any derivative or non-derivative securities of Chart Industries, Inc. (the &quot;Issuer&quot;).  The Reporting Person is an officer of First Reserve GP X, Inc. (&quot;GP X Inc.&quot;)  GP X Inc. is the general partner of First Reserve GP X, L.P. (&quot;GP X&quot;).  GP X is the general partner of First Reserve Fund X, L.P. (&quot;Fund X&quot;).  Fund X is the sole member of FR X Chart Holdings LLC (&quot;Holdings&quot; and collectively with GP X Inc., GP X, and Fund X, the &quot;Fund Entities.&quot;)  Holdings is a beneficial owner of securities of the Issuer.  The Reporting Person disclaims beneficial ownership of any securities of the Issuer beneficially owned by any of the Fund Entities for purposes of Section 16 or any other purpose.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Timothy H. Day by Anne E. Gold, Attorney-in-Fact.  See attached Power of Attorney</signatureName>
        <signatureDate>2006-07-25</signatureDate>
    </ownerSignature>
</ownershipDocument>
