Exhibit 23
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in the Registration Statements listed below of 海角涩区 of our report dated February 28, 2012 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. | 333-157546 | 海角涩区 Dividend Reinvestment and Stock Purchase Plan | ||
| 333-165054 | 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 | |||
| 333-166787 | 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
Pittsburgh, Pennsylvania
February 28, 2012