<SEC-DOCUMENT>0000950103-15-004921.txt : 20150619
<SEC-HEADER>0000950103-15-004921.hdr.sgml : 20150619
<ACCEPTANCE-DATETIME>20150619175309
ACCESSION NUMBER:		0000950103-15-004921
CONFORMED SUBMISSION TYPE:	3
PUBLIC DOCUMENT COUNT:		6
CONFORMED PERIOD OF REPORT:	20150610
FILED AS OF DATE:		20150619
DATE AS OF CHANGE:		20150619

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MRC GLOBAL INC.
		CENTRAL INDEX KEY:			0001439095
		STANDARD INDUSTRIAL CLASSIFICATION:	WHOLESALE-INDUSTRIAL MACHINERY & EQUIPMENT [5084]
		IRS NUMBER:				205956993
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2 HOUSTON CENTER
		STREET 2:		909 FANNIN, SUITE 3100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77010
		BUSINESS PHONE:		877.294.7574

	MAIL ADDRESS:	
		STREET 1:		2 HOUSTON CENTER
		STREET 2:		909 FANNIN, SUITE 3100
		CITY:			HOUSTON
		STATE:			TX
		ZIP:			77010

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MCJUNKIN RED MAN HOLDING CORP
		DATE OF NAME CHANGE:	20080702

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cornell Henry
		CENTRAL INDEX KEY:			0001309336

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35479
		FILM NUMBER:		15943270

	MAIL ADDRESS:	
		STREET 1:		1099 18TH STREET
		STREET 2:		SUITE 2300
		CITY:			DENVER
		STATE:			CO
		ZIP:			80202

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cornell Investment Partners LLC
		CENTRAL INDEX KEY:			0001644722
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35479
		FILM NUMBER:		15943271

	BUSINESS ADDRESS:	
		STREET 1:		C/O DAVIS POLK & WARDWELL LLP
		STREET 2:		ATTN: R.A DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		(212) 450-4795

	MAIL ADDRESS:	
		STREET 1:		C/O DAVIS POLK & WARDWELL LLP
		STREET 2:		ATTN: R.A DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cornell Capital GP II LP
		CENTRAL INDEX KEY:			0001644727
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35479
		FILM NUMBER:		15943272

	BUSINESS ADDRESS:	
		STREET 1:		C/O DAVIS POLK & WARDWELL LLP
		STREET 2:		ATTN: R.A DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		(212) 450-4795

	MAIL ADDRESS:	
		STREET 1:		C/O DAVIS POLK & WARDWELL LLP
		STREET 2:		ATTN: R.A DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Mario Investments LLC
		CENTRAL INDEX KEY:			0001644701
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35479
		FILM NUMBER:		15943274

	BUSINESS ADDRESS:	
		STREET 1:		C/O DAVIS POLK & WARDWELL LLP
		STREET 2:		ATTN: R.A DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		(212) 450-4795

	MAIL ADDRESS:	
		STREET 1:		C/O DAVIS POLK & WARDWELL LLP
		STREET 2:		ATTN: R.A DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cornell Capital Special Situations Partners II LP
		CENTRAL INDEX KEY:			0001642240
		STATE OF INCORPORATION:			E9
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		3
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-35479
		FILM NUMBER:		15943273

	BUSINESS ADDRESS:	
		STREET 1:		C/O DAVIS POLK AND WARDWELL LLP
		STREET 2:		ATTN: R.A. DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
		BUSINESS PHONE:		212-450-4745

	MAIL ADDRESS:	
		STREET 1:		C/O DAVIS POLK AND WARDWELL LLP
		STREET 2:		ATTN: R.A. DRUCKER, 450 LEXINGTON AVENUE
		CITY:			NEW YORK
		STATE:			NY
		ZIP:			10017
</SEC-HEADER>
<DOCUMENT>
<TYPE>3
<SEQUENCE>1
<FILENAME>dp57079_3.xml
<DESCRIPTION>FORM 3
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2015-06-10</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0001439095</issuerCik>
        <issuerName>MRC GLOBAL INC.</issuerName>
        <issuerTradingSymbol>MRC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001644701</rptOwnerCik>
            <rptOwnerName>Mario Investments LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DAVIS POLK &amp; WARDWELL LLP</rptOwnerStreet1>
            <rptOwnerStreet2>450 LEXINGTON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001642240</rptOwnerCik>
            <rptOwnerName>Cornell Capital Special Situations Partners II LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DAVIS POLK AND WARDWELL LLP</rptOwnerStreet1>
            <rptOwnerStreet2>450 LEXINGTON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001644727</rptOwnerCik>
            <rptOwnerName>Cornell Capital GP II LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DAVIS POLK &amp; WARDWELL LLP</rptOwnerStreet1>
            <rptOwnerStreet2>450 LEXINGTON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001644722</rptOwnerCik>
            <rptOwnerName>Cornell Investment Partners LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DAVIS POLK &amp; WARDWELL LLP</rptOwnerStreet1>
            <rptOwnerStreet2>450 LEXINGTON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001309336</rptOwnerCik>
            <rptOwnerName>Cornell Henry</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O DAVIS POLK &amp; WARDWELL LLP</rptOwnerStreet1>
            <rptOwnerStreet2>450 LEXINGTON AVENUE</rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10017</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeHolding>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>5849</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F4"/>
                    <footnoteId id="F7"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeHolding>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>6.5% Series A Convertible Perpetual Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>17.88</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F3"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>20302009.2</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                    <footnoteId id="F5"/>
                    <footnoteId id="F7"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>24.07</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F6"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>9415</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                    <footnoteId id="F6"/>
                    <footnoteId id="F7"/>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This statement is being filed jointly by Mario Investments LLC (&quot;Mario&quot;), Cornell Capital Special Situations Partners II LP (&quot;Cornell Special Situations II&quot;), Cornell Capital GP II LP (&quot;Cornell GP II&quot;), Cornell Investment Partners LLC (&quot;Cornell Investment Partners&quot;) and Henry Cornell (&quot;Mr. Cornell&quot; and, together with Mario, Cornell Special Situations II, Cornell GP II and Cornell Investment Partners, the &quot;Reporting Persons&quot;). Mr. Cornell is the sole member of Cornell Investment Partners, which is the general partner of Cornell GP II, which is the general partner of Cornell Special Situations II, which is the sole member of Mario.</footnote>
        <footnote id="F2">On May 19, 2015, the Issuer entered into a Purchase Agreement (the &quot;Purchase Agreement&quot;) with Mario, pursuant to which the Issuer agreed to issue and sell to Mario an aggregate of 363,000 shares of its 6.50% Series A Convertible Perpetual Preferred Stock, par value $0.01 per share (the &quot;Series A Preferred Stock&quot;), for an aggregate purchase price of $363 million, or $1,000 per share, in a privately negotiated transaction. The transactions contemplated by the Purchase Agreement closed on June 10, 2015 (the &quot;Issuance Date&quot;), at which time the Series A Preferred Stock was issued to Mario.</footnote>
        <footnote id="F3">The Series A Preferred Stock is convertible at the option of Mario at any time after the Issuance Date and, under certain circumstances, as required by the Issuer, into shares of Common Stock at an initial conversion rate of 55.9284 shares of Common Stock for each share of Series A Preferred Stock, which represents an initial conversion price of approximately $17.88 per share of Common Stock, subject to adjustment for stock splits and other similar corporate transactions. The Series A Preferred Stock does not have an expiration date.</footnote>
        <footnote id="F4">Mr. Cornell is the direct beneficial owner of these shares of Common Stock.</footnote>
        <footnote id="F5">Mario is the direct beneficial owner of these shares of Series A Preferred Stock. Cornell Special Situations II, Cornell GP II, Cornell Investment Partners and Mr. Cornell are indirect beneficial owners of these shares of Series A Preferred Stock.</footnote>
        <footnote id="F6">Mr. Cornell is the direct beneficial owner of these stock options. The stock options are fully exercisable, and expire on November 14, 2015, which is 180 days after Mr. Cornell's termination of service as a director of the Issuer.</footnote>
        <footnote id="F7">Each of the Reporting Persons disclaims beneficial ownership of the securities reported in Table I and Table II except to the extent of its pecuniary interest therein, if any.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Joanna Reiss, Attorney-in-fact for Mario Investments LLC</signatureName>
        <signatureDate>2015-06-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Joanna Reiss, Attorney-in-fact for Cornell Capital Special Situations Partners II LP</signatureName>
        <signatureDate>2015-06-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Joanna Reiss, Attorney-in-fact for Cornell Capital GP II LP</signatureName>
        <signatureDate>2015-06-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Joanna Reiss, Attorney-in-fact for Cornell Investment Partners LLC</signatureName>
        <signatureDate>2015-06-19</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Joanna Reiss, Attorney-in-fact for Henry Cornell</signatureName>
        <signatureDate>2015-06-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.1
<SEQUENCE>2
<FILENAME>dp57079_ex2401.htm
<DESCRIPTION>EXHIBIT 24.1
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: right">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: center">POWER OF ATTORNEY</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Know all by those present, that the undersigned
hereby constitutes and appoints each of <FONT STYLE="font-size: 10pt">Henry Cornell and Joanna Reiss, or any of them signing singly,
and with full power of substitution, as the undersigned&rsquo;s true and lawful attorneys-in-fact to prepare, execute and file,
or cause to be prepared, executed and filed, with the U.S. Securities and Exchange Commission (&ldquo;SEC&rdquo;) for the undersigned
and in the undersigned&rsquo;s name in connection with certain transactions of common stock, par value </FONT>$0.01 per share,
of MRC Global Inc., a Delaware corporation (the &ldquo;Company&rdquo;)<FONT STYLE="font-size: 10pt">:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(1)&#9;the Initial Statement of Beneficial Ownership of Securities
on Form 3, any Statement of Changes in Beneficial Ownership on Form 4 and any Annual Statement of Changes in Beneficial Ownership
on Form 5, or any similar or successor form, which may be required to be filed by the undersigned pursuant to Section 16 of the
Securities Exchange Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;);</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(2)&#9;do and perform any and all acts for and on behalf of
the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, complete and execute any amendment
or amendments thereto and timely file such form with the SEC and the applicable stock exchange or similar authority; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(3)&#9;take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of any of such attorneys-in-fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the documents executed by any of such attorneys-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as any of such
attorneys-in-fact may approve in such attorney-in-fact&rsquo;s discretion.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">The undersigned hereby grants to each such attorney-in-fact
full power and authority to act separately and to do and perform any and every act and thing whatsoever requisite, necessary, or
proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that
any of such attorneys-in-fact, or the substitute or substitutes of any of such attorneys-in-fact, shall lawfully do or cause to
be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming,
any of the undersigned&rsquo;s responsibilities to comply with Section 16 of the Exchange Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">This Power of Attorney shall remain in full
force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned&rsquo;s holdings
of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin-top: 0pt; margin-bottom: 0pt; margin-left: 0.25in; text-indent: 0in"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">IN
WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this 10<SUP>th</SUP> day of June, 2015.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="RIGHT" STYLE="width: 40%; font: 10pt Times New Roman, Times, Serif; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2"><B>MARIO INVESTMENTS LLC</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">By: Cornell Special Situations Partners II LP, its sole member</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">By: Cornell Capital GP II LP, its general partner</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">By: Cornell Investment Partners LLC, its general partner</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">By: Henry Cornell, its sole member</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">By: <U>/s/ Henry Cornell&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">Name: Henry Cornell</TD></TR>
</TABLE><BR STYLE="clear: both">
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>



<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.2
<SEQUENCE>3
<FILENAME>dp57079_ex2402.htm
<DESCRIPTION>EXHIBIT 24.2
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: right">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: center">POWER OF ATTORNEY</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Know all by those present, that the undersigned
hereby constitutes and appoints each of <FONT STYLE="font-size: 10pt">Henry Cornell and Joanna Reiss, or any of them signing singly,
and with full power of substitution, as the undersigned&rsquo;s true and lawful attorneys-in-fact to prepare, execute and file,
or cause to be prepared, executed and filed, with the U.S. Securities and Exchange Commission (&ldquo;SEC&rdquo;) for the undersigned
and in the undersigned&rsquo;s name in connection with certain transactions of common stock, par value </FONT>$0.01 per share,
of MRC Global Inc., a Delaware corporation (the &ldquo;Company&rdquo;)<FONT STYLE="font-size: 10pt">:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(1)&#9;the Initial Statement of Beneficial Ownership of Securities
on Form 3, any Statement of Changes in Beneficial Ownership on Form 4 and any Annual Statement of Changes in Beneficial Ownership
on Form 5, or any similar or successor form, which may be required to be filed by the undersigned pursuant to Section 16 of the
Securities Exchange Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;);</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(2)&#9;do and perform any and all acts for and on behalf of
the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, complete and execute any amendment
or amendments thereto and timely file such form with the SEC and the applicable stock exchange or similar authority; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(3)&#9;take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of any of such attorneys-in-fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the documents executed by any of such attorneys-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as any of such
attorneys-in-fact may approve in such attorney-in-fact&rsquo;s discretion.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">The undersigned hereby grants to each such attorney-in-fact
full power and authority to act separately and to do and perform any and every act and thing whatsoever requisite, necessary, or
proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that
any of such attorneys-in-fact, or the substitute or substitutes of any of such attorneys-in-fact, shall lawfully do or cause to
be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming,
any of the undersigned&rsquo;s responsibilities to comply with Section 16 of the Exchange Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">This Power of Attorney shall remain in full
force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned&rsquo;s holdings
of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 10<SUP>th</SUP> day of June, 2015.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="RIGHT" STYLE="font: 10pt Times New Roman, Times, Serif; width: 40%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt"><B>CORNELL CAPITAL SPECIAL SITUATIONS PARTNERS II LP</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">By: Cornell Capital GP II LP, its general partner</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">By: Cornell Investment Partners LLC, its general partner</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">By: Henry Cornell, its sole member</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">By: <U>/s/ Henry Cornell&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">Name: Henry Cornell</TD></TR>
</TABLE><BR STYLE="clear: both">
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>



<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.3
<SEQUENCE>4
<FILENAME>dp57079_ex2403.htm
<DESCRIPTION>EXHIBIT 24.3
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: right">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: center">POWER OF ATTORNEY</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Know all by those present, that the undersigned
hereby constitutes and appoints each of <FONT STYLE="font-size: 10pt">Henry Cornell and Joanna Reiss, or any of them signing singly,
and with full power of substitution, as the undersigned&rsquo;s true and lawful attorneys-in-fact to prepare, execute and file,
or cause to be prepared, executed and filed, with the U.S. Securities and Exchange Commission (&ldquo;SEC&rdquo;) for the undersigned
and in the undersigned&rsquo;s name in connection with certain transactions of common stock, par value </FONT>$0.01 per share,
of MRC Global Inc., a Delaware corporation (the &ldquo;Company&rdquo;)<FONT STYLE="font-size: 10pt">:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(1)&#9;the Initial Statement of Beneficial Ownership of Securities
on Form 3, any Statement of Changes in Beneficial Ownership on Form 4 and any Annual Statement of Changes in Beneficial Ownership
on Form 5, or any similar or successor form, which may be required to be filed by the undersigned pursuant to Section 16 of the
Securities Exchange Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;);</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(2)&#9;do and perform any and all acts for and on behalf of
the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, complete and execute any amendment
or amendments thereto and timely file such form with the SEC and the applicable stock exchange or similar authority; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(3)&#9;take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of any of such attorneys-in-fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the documents executed by any of such attorneys-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as any of such
attorneys-in-fact may approve in such attorney-in-fact&rsquo;s discretion.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">The undersigned hereby grants to each such attorney-in-fact
full power and authority to act separately and to do and perform any and every act and thing whatsoever requisite, necessary, or
proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that
any of such attorneys-in-fact, or the substitute or substitutes of any of such attorneys-in-fact, shall lawfully do or cause to
be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming,
any of the undersigned&rsquo;s responsibilities to comply with Section 16 of the Exchange Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">This Power of Attorney shall remain in full
force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned&rsquo;s holdings
of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 10<SUP>th</SUP> day of June, 2015.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="RIGHT" STYLE="font: 10pt Times New Roman, Times, Serif; width: 40%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt"><B>CORNELL CAPITAL GP II LP</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2">
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">By: Cornell Investment Partners LLC, its general partner</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">By: Henry Cornell, its sole member</P>
        <P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">By: <U>/s/ Henry Cornell&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">Name: Henry Cornell</TD></TR>
</TABLE><BR STYLE="clear: both">
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>



<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.4
<SEQUENCE>5
<FILENAME>dp57079_ex2404.htm
<DESCRIPTION>EXHIBIT 24.4
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: right">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: center">POWER OF ATTORNEY</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Know all by those present, that the undersigned
hereby constitutes and appoints each of <FONT STYLE="font-size: 10pt">Henry Cornell and Joanna Reiss, or any of them signing singly,
and with full power of substitution, as the undersigned&rsquo;s true and lawful attorneys-in-fact to prepare, execute and file,
or cause to be prepared, executed and filed, with the U.S. Securities and Exchange Commission (&ldquo;SEC&rdquo;) for the undersigned
and in the undersigned&rsquo;s name in connection with certain transactions of common stock, par value </FONT>$0.01 per share,
of MRC Global Inc., a Delaware corporation (the &ldquo;Company&rdquo;)<FONT STYLE="font-size: 10pt">:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(1)&#9;the Initial Statement of Beneficial Ownership of Securities
on Form 3, any Statement of Changes in Beneficial Ownership on Form 4 and any Annual Statement of Changes in Beneficial Ownership
on Form 5, or any similar or successor form, which may be required to be filed by the undersigned pursuant to Section 16 of the
Securities Exchange Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;);</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(2)&#9;do and perform any and all acts for and on behalf of
the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, complete and execute any amendment
or amendments thereto and timely file such form with the SEC and the applicable stock exchange or similar authority; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">&#9;(3)&#9;take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of any of such attorneys-in-fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the documents executed by any of such attorneys-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as any of such
attorneys-in-fact may approve in such attorney-in-fact&rsquo;s discretion.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">The undersigned hereby grants to each such attorney-in-fact
full power and authority to act separately and to do and perform any and every act and thing whatsoever requisite, necessary, or
proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that
any of such attorneys-in-fact, or the substitute or substitutes of any of such attorneys-in-fact, shall lawfully do or cause to
be done by virtue of this Power of Attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming,
any of the undersigned&rsquo;s responsibilities to comply with Section 16 of the Exchange Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">This Power of Attorney shall remain in full
force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned&rsquo;s holdings
of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered
to the foregoing attorneys-in-fact.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 10<SUP>th</SUP> day of June, 2015.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" ALIGN="RIGHT" STYLE="font: 10pt Times New Roman, Times, Serif; width: 40%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt"><B>CORNELL INVESTMENT PARTNERS LLC</B></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">&nbsp;</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">By: Henry Cornell, its sole member</TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">By: <U>/s/ Henry Cornell&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD COLSPAN="2" STYLE="font-size: 10pt">Name: Henry Cornell</TD></TR>
</TABLE><BR STYLE="clear: both">
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>



<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24.5
<SEQUENCE>6
<FILENAME>dp57079_ex2405.htm
<DESCRIPTION>EXHIBIT 24.5
<TEXT>
<HTML>
<HEAD>
     <TITLE></TITLE>
</HEAD>
<BODY STYLE="font: 10pt Times New Roman, Times, Serif">

<P STYLE="margin: 0"></P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: right">&nbsp;</P>

<P STYLE="font: bold 10pt Times New Roman, Times, Serif; margin: 0 0 12pt; text-align: center">POWER OF ATTORNEY</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">Know all by those present, that the undersigned
hereby constitutes and appoints <FONT STYLE="font-size: 10pt">Joanna Reiss as the undersigned&rsquo;s true and lawful attorney-in-fact
to prepare, execute and file, or cause to be prepared, executed and filed, with the U.S. Securities and Exchange Commission (&ldquo;SEC&rdquo;)
for the undersigned and in the undersigned&rsquo;s name in connection with certain transactions of common stock, par value </FONT>$0.01
per share, of MRC Global Inc., a Delaware corporation (the &ldquo;Company&rdquo;)<FONT STYLE="font-size: 10pt">:</FONT></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&#9;(1)&#9;the Initial Statement of Beneficial Ownership of Securities
on Form 3, any Statement of Changes in Beneficial Ownership on Form 4 and any Annual Statement of Changes in Beneficial Ownership
on Form 5, or any similar or successor form, which may be required to be filed by the undersigned pursuant to Section 16 of the
Securities Exchange Act of 1934, as amended (the &ldquo;Exchange Act&rdquo;);</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&#9;(2)&#9;do and perform any and all acts for and on behalf of
the undersigned which may be necessary or desirable to complete and execute any such Form 3, 4 or 5, complete and execute any amendment
or amendments thereto and timely file such form with the SEC and the applicable stock exchange or similar authority; and</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&#9;(3)&#9;take any other action of any type whatsoever in connection
with the foregoing which, in the opinion of any of the attorney-in-fact, may be of benefit to, in the best interest of, or legally
required by, the undersigned, it being understood that the documents executed by the attorney-in-fact on behalf of the undersigned
pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as the attorney-in-fact may
approve in such attorney-in-fact&rsquo;s discretion.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">The undersigned hereby grants to the attorney-in-fact
full power and authority to act separately and to do and perform any and every act and thing whatsoever requisite, necessary, or
proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned
might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that
the attorney-in-fact shall lawfully do or cause to be done by virtue of this Power of Attorney and the rights and powers herein
granted. The undersigned acknowledges that the attorney-in-fact, in serving in such capacity at the request of the undersigned,
is not assuming, nor is the Company assuming, any of the undersigned&rsquo;s responsibilities to comply with Section 16 of the
Exchange Act.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">This Power of Attorney shall remain in full
force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned&rsquo;s holdings
of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered
to the attorney-in-fact.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0"></P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0; text-indent: 0.5in">IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed as of this 10<SUP>th</SUP> day of June, 2015.</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0 0 0 4in"></P>

<TABLE CELLSPACING="0" CELLPADDING="0" STYLE="font: 10pt Times New Roman, Times, Serif; width: 100%; border-collapse: collapse">
<TR STYLE="vertical-align: top">
    <TD STYLE="width: 60%; font-size: 10pt">&nbsp;</TD>
    <TD STYLE="width: 40%; font-size: 10pt"><U>/s/ Henry Cornell&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</U></TD></TR>
<TR STYLE="vertical-align: top">
    <TD STYLE="font-size: 10pt">&nbsp;</TD>
    <TD STYLE="font-size: 10pt"><FONT STYLE="font-size: 10pt">Henry Cornell</FONT></TD></TR>
</TABLE>
<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>

<P STYLE="font: 10pt Times New Roman, Times, Serif; margin: 0">&nbsp;</P>



<P STYLE="margin: 0"></P>

</BODY>
</HTML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
