ISO 1401 pdf download.Rubber hoses for agricultural spraying
1 Scope
This International Standard specifies requirements for three types of flexible rubber hose for pressure spraying of agropharmaceutical and/or fertilizer products within a temperature range of –1 0 °C to + 60 °C.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties . ISO 1 88, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests . ISO 471 , Rubber — Temperatures, humidities and times for conditioning and testing . ISO 1 307, Rubber and plastics hoses for general-purpose industrial applications — Bore diameters and tolerances, and tolerances on length . ISO 1 402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing . ISO 1 746, Rubber or plastics hoses and tubing — Bending tests . ISO 1 81 7, Rubber, vulcanized — Determination of the effect of liquids . ISO 4671 , Rubber and plastics hoses and hose assemblies — Methods of measurement of dimensions . ISO 7326:1 991 , Rubber and plastics hoses — Assessment of ozone resistance under static conditions . ISO 8033, Rubber and plastics hose — Determination of adhesion between components .
3 Classification
Three types of hose are specified as follows: – type A: Maximum working pressure of 1 ,0 MPa (1 0 bar); – type B: Maximum working pressure of 4,0 MPa (40 bar); – type C: Maximum working pressure of 6,0 MPa (60 bar)
4 Construction and materials
The hose shall consist of the following:
– a synthetic rubber lining;
– a reinforcement of one or more layers of textile fibres;
– a cover of natural or synthetic rubber.
5 Dimensions and tolerances
5.1 Nominal bore and internal diameter
The dimensions of the hose shall be in accordance with the internal diameter and tolerances given in Table 1 , in accordance with ISO 1 307.
6.3 Accelerated ageing
After ageing the hose in air for three days at 1 00 °C ± 2 °C, as specified in ISO 1 88, the tensile strength and elongation at break as determined by ISO 37 shall decrease by no more than 25 % and 50 % respectively from their initial values.
7 Physical requirements on finished hoses
7.1 Change in dimensions When the hose is tested at proof pressure in accordance with ISO 1 402, the changes in outside diameter and length shall be no greater than ± 7 % and there shall be no leaks or other signs of damage. 7.2 Hydrostatic requirements 7.2.1 Hydrostatic pressure When tested in accordance with ISO 1 402, the hose shall meet the requirements given in Table 4.7.2.2 Hydrostatic testing after ageing in liquid A 1 m length of hose shall be filled with the liquid to be used in the hose and aged for two weeks at standard laboratory temperature (see ISO 471 ). After ageing, the hose shall be drained and hydrostatically tested after 1 h in accordance with ISO 1 402. The hose shall meet the requirements given in Table 4. 7.3 Bending-test requirements When determined in accordance with ISO 1 746 using a minimum radius of curvature of 1 0 times the nominal bore, the value of the ratio of hose outside dimension, during bending, to the original outside diameter, T/D, shall be a minimum of 0,80. 7.4 Adhesion When determined in accordance with ISO 8033, the adhesion between the various components shall be no less than 1 ,5 kN/m. 7.5 Resistance to ozone When tested in accordance with ISO 7326:1 991 , method 1 , the test piece shall show no signs of cracking.