Abstract: Analyzed in the article are the 2011 production and management situations of Tenaris (Luxembourg) and Vallourec (France),the two major powers in global steel pipe-making circles in terms of sales volume,profitability,market share,assets and liabilities,and debt-paying ability.As a result,the following data are identified.In 2011,both Tenaris Group and Vallourec Group had significant growths of sales revenues,whereas the net profit of the latter was reduced;the two groups still had their major steel tube market shares in the American Continent;while Tenaris kept its assets and liabilities little changed,in contrary,Vallourec had its assets and liabilities increased significantly;and for the steel tube market prospects in 2012,both groups are optimistic about the market of OCTG.