International Organization for Standardization (ISO)
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ISO 5031:1977
Scope
Specifies, in addition to the general safety rules set out in ISO/T 1819, the special safety rules for couplings and hose components used in the pneumatic handling of loose bulk materials. These safety rules apply regardless of the use for which the equipment is intended.
ISO 5031:1977 history
1977ISO 5031:1977 Continuous mechanical handling equipment for loose bulk materials; Couplings and hose components used in pneumatic handling; Safety code