DIN hydraulic hose standards:
DIN 20021 Textile braid reinforced hosesfor Fluid-systems Hoses with layer Completation for DIN EN 853 to DIN EN 857
DIN 20022 wire braid reinforced hoses
DIN 20023 sprial wire reinforced hoses
DIN 20024 hose and hose assemblies test methods
DIN 20026 hose assemblies, dimensions, requirement
DIN EN 853 Rubber hoses and hose assemblies, Wire braid reinforced hydraulic type Specification
DIN EN 854 Rubber hoses and hose assemblies Textile reinforced hydraulic type Specification
DIN EN 855 Plastic hoses and hose assemblies Thermoplastics textile reinforced hydraulic type Specification
DIN EN 856 Rubber hoses and hose assemblies Rubber-covered spiral wire reinforced hydraulic type Specification
DIN EN 857 Rubber hoses and hose assemblies Wire braid reinforced compact type for hydraulic applications Specification
DIN series standard of hydraulic hoses is also interchangeable to ISO 1436 and SAE J517 standards, but also has difference.
The usage of DIN Hydraulic hoses and fittings in excavator equipment as this picture
