LIMITED POWER OF ATTORNEY

The undersigned, being an executive officer of MRC Global Inc.
(the ?Corporation?), who will thereby be subject to the reporting
obligations of Section 16 of the Securities Exchange Act of 1934,
as amended (the ?Act?), with respect to securities of the
Corporation, hereby constitutes and appoints, with full power
of substitution or revocation, each of Daniel J. Churay and
Jeffrey P. Bennett, or such attorney-in-fact?s substitute or
substitutes, as the undersigned?s true and lawful attorneys-in-fact
and agents to execute and file for and on behalf of the undersigned
Forms 4 and 5 with the Securities and Exchange Commission (the ?SEC?),
and to perform all acts necessary in order to execute and file
such Forms 4 and 5, as he or she, as applicable, shall deem
appropriate. The undersigned hereby ratifies and confirms all
that said attorneys-in-fact and agents, or such attorney-in-fact?s
substitute or substitutes, shall do or cause to be done by virtue
hereof.

The undersigned acknowledges that the foregoing attorneys-in-fact,
in serving in such capacity at the request of the undersigned,
or such attorney-in-fact?s substitute or substitutes, are not
assuming, nor is the Corporation assuming, any of the undersigned?s
responsibilities to comply with Section 16 of the Act.  This
Limited Power of Attorney shall remain in full force and effect
until the undersigned is no longer required to file Forms 4 and
5 with respect to the undersigned?s holdings of and transactions
in securities issued by the Corporation, unless earlier revoked
by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

This Limited Power of Attorney is effective as of March 6, 2014,
and any previous power of attorney issued by the undersigned
for the purpose of executing and filing Forms 4 and 5 with
the SEC with respect to holdings of and transactions in
securities issued by the Corporation is hereby revoked
(without affecting the effectiveness of any such power of
attorney prior to the date hereof).


/s/ Andrew R. Lane			/s/ James E. Braun
Andrew R. Lane				James E. Braun


/s/ Daniel J. Churay			/s/ Gary A. Ittner
Daniel J. Churay			Gary A. Ittner


/s/ Rory A. Isaac			/s/ Alan H. Colonna
Rory A. Isaac				Alan H. Colonna


/s/ Elton R. Bond
Elton R. Bond