BS EN ISO 3861:2021 pdf download – Rubber hoses and hose assemblies for sand and grit blasting — Specification
This document specifies the requirements for rubber hoses and hose assemblies for wet and dry sand and grit blasting, suitable for use up to a maximum working pressure of 0,63 MPa (6,3 bar) and over an operating temperature range of −25 °C to +70 °C.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 188:2011, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 1307, Rubber and plastics hoses — Hose sizes, minimum and maximum inside diameters, and tolerances on cut-to-length hoses
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 4649:2017, Rubber, vulcanized or thermoplastic — Determination of abrasion resistance using a rotating cylindrical drum device
ISO 4671, Rubber and plastics hoses and hose assemblies — Methods of measurement of the dimensions of hoses and the lengths of hose assemblies
ISO 7326:2016, Rubber and plastics hoses — Assessment of ozone resistance under static conditions
ISO 8031, Rubber and plastics hoses and hose assemblies — Determination of electrical resistance and conductivity
ISO 8033, Rubber and plastics hoses — Determination of adhesion between components
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
ISO 10619-1:2017, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 1: Bending tests at ambient temperature
ISO 10619-2:2017, Rubber and plastics hoses and tubing — Measurement of flexibility and stiffness — Part 2: Bending tests at sub-ambient temperatures
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8330 apply.
6.2 Concentricity When determined in accordance with ISO 4671, the concentricity, based on a total indicator reading between the inside diameter and the outside surface of the cover, shall be no greater than 1,0 mm.
6.3 Tolerance on length When measured in accordance with ISO 4671, the tolerance on cut lengths shall be as specified in ISO 1307.
6.4 Minimum thickness of lining and cover When measured in accordance with ISO 4671, the minimum thickness of the rubber lining shall be 5,0 mm and that of the cover 1,0 mm.
7 Physical properties
7.1 Rubber compounds When tested by the methods listed in Table 2, the physical properties of the compounds used for the lining and cover shall conform to the values specified in Table 2. Tests shall be carried out either on samples taken from the hose or from separately vulcanized sheets 2 mm thick for the tensile/elongation tests and thicker for the abrasion test. These shall be vulcanized to the same state of cure as production hoses.
8 Frequency of testing
Type testing and routine testing shall be as specified in Annex A. Type tests are those tests required to confirm that a particular hose design, manufactured by a particular method, meets all the requirements of this document. The tests shall be repeated at a maximum of five-year intervals, or whenever a change in the method of manufacture or materials used occurs. They shall be performed on all sizes, and on all classes and types except those of the same size and construction. Routine tests are those tests required to be carried out on each length of finished hose prior to dispatch. Production acceptance tests are those tests, specified in Annex B, which should preferably be carried out to control the quality of manufacture. The frequencies specified in Annex B are given as a guide only.
9.1 Hoses Hoses meeting the requirements of this document shall be marked at least once every 760 mm with at least the following information:
a) the manufacturer’s name or identification, e.g. XXX;
b) a reference to this document, i.e. ISO 3861;
c) the hose grade e.g. M or Ω;
d) the inside diameter, in millimetres, e.g. 25;BS EN ISO 3861 pdf download.