South Texas Supply S-4 Registration of securities issued in business combination transactions

Exhibit 12.1

McJunkin Red Man Holding Corporation

Ratio of Earnings to Fixed Charges

(in thousands)

	Predecessor						Successor
							Eleven
				One Month			Months
	Year Ended			Ended			Ended
	December 31,			January			December 31,			Year Ended December 31,
	2006			2007			2007			2008			2009(1)			2010(2)
Earnings
Pretax income (loss) from continuing operations	$	117.9		$	11.2		$	82.0		$	406.7		$	(278.6	)	$	(75.2	)
Fixed Charges		3.2			0.1			62.1			85.2			117.0			140.3
Earnings	$	121.1		$	11.3		$	144.1		$	491.9		$	(161.6	)	$	65.0
Fixed charges:
Interest expense (3)	$	2.8		$	0.1		$	61.7		$	84.5		$	116.5		$	139.6
Interest component of rental expense		0.4			—			0.4			0.7			0.5			0.7
Total fixed charges		3.2			0.1			62.1			85.2			117.0			140.3
Ratio of earning to fixed charges (4)		38.2	x		107.7	x		2.3	x		5.8	x		—			—

(1)	Earnings were insufficient to cover fixed charges by $279 million for the year ended December 31, 2009.
(2)	Earnings were insufficient to cover fixed charges by $75 million for the year ended December 31, 2010.
(3)	Interest expense includes original issue discount and amortization charges associated with debt issuance costs.
(4)	Certain ratios may not recompute due to rounding differences.