oil country tubular goods
method of manufacture high frequency electric resistance weld (erw) od range no. 2 mill: 2 3/8 to 7, no. 1 mill: 7 to 16 walls no. 2 mill: 0.154 to 0.531, no. 1 mill: 0.250 to 0.562 lengths range 3 casing, range 2 tubing texas tubular grades