This standard specifies the quality requirements for aluminum alloy profiles. This standard applies to travel suitcase openings and other decorative aluminum alloy profiles.
QB/T 1586.4-1992 history
2010QB/T 1586.4-2010 Hardware fitting of case and bag.Welding for aluminum shapes
1992QB/T 1586.4-1992 Aluminum alloy profiles for luggage hardware accessories