Exhibit 23.1

Consent of Independent Auditors

We consent to the incorporation by reference in the following Registration Statements:

(1)	Registration Statement (Form S-8 No. 333-64442) pertaining to the Employee Stock Purchase Plan of Chicago Bridge & Iron Company N.V.,
(2)	Registration Statement (Form S-8 No. 333-156004) pertaining to the 2008 Long-Term Incentive Plan of Chicago Bridge & Iron Company N.V.,
(3)	Registration Statement (Form S-8 No. 333-87081) pertaining to the 1999 Long-Term Incentive Plan of Chicago Bridge & Iron Company N.V.,
(4)	Registration Statement (Form S-8 No. 333-39975) pertaining to the Employees Stock Purchase Plan (1997) of Chicago Bridge & Iron Company N.V.,
(5)	Registration Statement (Form S-8 No. 333-24443) pertaining to the Management Defined Contribution Stock Incentive Plan of Chicago Bridge & Iron Company N.V.,
(6)	Registration Statement (Form S-8 No. 333-24445) pertaining to the Long-Term Incentive Plan of Chicago Bridge & Iron Company N.V.,
(7)	Registration Statement (Form S-8 No. 333-33199) pertaining to the Savings Plan of Chicago Bridge & Iron Company N.V.;

of our report dated March 30, 2009, with respect to the financial statements of Chevron Lummus Global LLC included in this Annual Report (Form 10-K/A) of Chicago Bridge & Iron Company N.V. for the year ended December 31, 2008.

/s/ Ernst & Young LLP 
New York, New York
March 31, 2009