In the UK it is standard - my institution has blind marking, double marking and scrutiny by external examiners for all undergraduate exams. Blind marking: we only have a candidate number and not a student's name. Second marking: someone else evaluates the marks (grades) I give - in some cases independently; external examiner: someone from another institution checks that the marking criteria is being followed.

Blind marking could be circumvented in various ways, but doing so would be risky as the exams will be seen by others. Second marking and external examining are a huge time burden but achieve some degree of quality control, especially important as students don't get to see their exam papers again (perhaps the biggest surprise to staff and students who come here from the US and are used to post-exam argumentation as a form of "quality control").