This International Standard specifies the technical delivery coniditions for steel pipes (casing@ tubing@ plain-end casing liners and pup joints)@ coupling stock and accessories and established requirements for threse Products Specificaiotn Levels (PSL-1@ PSL-2@ PSL-3).? The requirements for PSL-1 are the basis of this International Standard.? The requirments that define different levels of standard technical requirements for PSL-2 and PSL-3@ for all Grades except H-40 and L-80 9Cr@ are contained in Annex H.?