海角涩区

Exhibit 23

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements listed below of our report dated February 24, 2009 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

 

On Form S-3:
  File No. 333-75148      海角涩区 Dividend Reinvestment and Stock Purchase Plan
                333-108131      海角涩区 Dividend Reinvestment and Stock Purchase Plan
                333-141080      海角涩区 Senior Debt Securities, Subordinated Debt Securities, Common Stock, Preferred Stock, Depositary Shares, Warrants, Stock Purchase Contracts and Stock Purchase Units
On Form S-8:     
  File No. 333-76394      海角涩区 2002 Stock Plan
                333-125221      海角涩区 2005 Stock Incentive Plan
                333-151438      海角涩区 Tubular Services Savings Plan
                333-151440      海角涩区 Savings Fund Plan for Salaried Employees

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Pittsburgh, Pennsylvania

February 24, 2009