BS ISO 11237-1 pdf download Rubber hoses and hose assemblies — Wire-braid-reinforced compact types for hydraulic applications — Specification — Part 1: Oil-based fluid applications
This part of lSO 11237 specifies requirements for three types of wire-braid-reinforced compact hose and hoseassembly of nominal bore from 6,3 to 31,5. They are suitable for use with hydraulic fluids HH,HL, HM, HREand HV in accordance with ISO 6743-4 at temperatures ranging from -40 C to +100 °℃.
This part of ISO 11237 does not include requirements for end fittings. It is limited to the performance of hosesand hose assemblies.
NOTE lt is the responsibility of the user, in consultation with the hose manufacturer, to establish compatibility of thehose with the fluid to be used.
The following referenced documents are indispensable for the application of this document.For datedreferences,only the edition cited applies. For undated references,the latest edition of the referenceddocument (including any amendments) applies.
ISO 1402,Rubber and plastics hoses and hose assemblies — Hydrostatic testingISO 1817,Rubber,vulcanized — Determination of the effect of liquids
ISO 4671,Rubber and plastics hoses and hose assemblies — Methods of measurement of dimensionsISO 4672:1997,Rubber and plastics hoses — Sub-ambient temperature flexibility tests
ISO 6803,Rubber or plastics hoses and hose assemblies— Hydraulic pressure impulse test without flexingISo 6945,Rubber hoses —Determination of abrasion resistance of the outer cover
ISO 7233,Rubber and plastics hoses and hose assemblies — Determination of suction resistanceISO 7326:1991, Rubber and plastics hoses — Assessment of ozone resistance under static conditionsISO 8033:1991,Rubber and plastics hose — Determination of adhesion between components
Three types of hose are specified, distinguished by their construction, working pressure, minimum bend radius and oil resistance:
a) Type 1 SC, hoses with a single braid of wire reinforcement;
b) Type 2SC, hoses with two braids of wire reinforcement;
c) Type R16, hoses with one or two braids of wire reinforcement;
d) Type R17, 21 0 bar constant-pressure hoses with one or two braids of wire reinforcement.
NOTE Type R1 6 and R1 7 are not subjected to the vacuum resistance or abrasion resistance tests.
4 Materials and construction
Hoses shall consist of a hydraulic fluid resistant rubber lining, one or two layers of high tensile steel wire and an oil and weather resistant rubber cover.
4.2 Hose assemblies
Hose assemblies shall only be manufactured with those hose fittings whose functionality conforms to the requirements of 6.1 , 6.3 and 6.4 of this part of ISO 1 1 237.
The manufacturer’s instructions for proper preparation and fabrication of hose assemblies shall be followed.
When measured in accordance with ISO 4671 , the dimensions of the hoses shall conform to the values given in Table 1 .