ASTM A269 & ASTM A312 – Chicago Tube & Iron
Tests per ASTM A269 and A450* Flare for seamless tubes; Flange for welded tubes; Reverse flatten for welded tubes; Hardness: Rockwell B90 or BHN 200 maximum; Hydrotest: At 1000 to 4500 psi depending on diameter provided stress does not exceed 26,000 or 24,000 psi maximum if ordered per P=2St/D.