Hydraulic hoses are far more important components of machinery, equipment and industries. There are standard hydraulic hoses which are produced depending on SAE R100, EN 853, EN 856 and so on. Their reinforcements are one steel wire reinforcement, two steel wire reinforcement, three steel wire layers, four steel wire layers and six steel wire layers. However, standard rubber hoses can't meet all specified requirements. Hence, special hydraulic hoses which are designed with high pressure or smaller bending radius is supplied.
There are part of specifications for your reference:
SAE 100 R1AT/DIN EN 853 1SN STANDARD
Tube: Oil resistant synthetic rubber
Reinforcement: One high tensile steel wire braid
Cover: Abrasion and weather resistant synthetic rubber