ISO 2928-2021 pdf free.Rubber hoses and hose assemblies for liquefied petroleum gas (LPG) in the liquid or gaseous phase and natural gas up to 2,5 MPa (25 bar) – Specification.
This document specifics requirements for rubber hoses and rubber hose assemblies used for the transfer of liquefied petroleum gas (LPG) in the liquid or gaseous phase and natural gas and designed for use at working pressures ranging from vacuum to a maximum of 2,5 MPa (25 bar) within the temperature range —30 °C to +70 °C or, for low-temperature hoses (designated -LT), within the temperature range
—50 °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 48-2, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 2: Hardness between 10 JRHD and 100 IRHD
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated a,qeing and heat resistance tests
ISO 1382, Rubber — Vocabulary
ISO 1402, Rubber and plastics hoses and hose assemblies — Hydrostatic testing
ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids
ISO 4649, 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 6179:20 17, Rubber, vulcanized or thermoplastic — Rubber sheets and rubber-coated fabrics — Determination of transmission rate of volatile liquids (gravimetric technique)
ISO 7233, Rubber and plastics hoses and hose assemblies — Determination of suction resistance ISO 7326, 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, 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 1382 and ISO 8330 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Classification
Hoses and hose assemblies shall be one of the following types:
— type D: delivery hose;
— type D-LT: delivery hose, low-temperature;
— type SD: suction and delivery hose, helix-reinforced;
— type SD-LTR: suction and delivery hose, helix-reinforced, low-temperature (rough-bore).
— type SD-LTS: suction and delivery hose, helix-reinforced, low-temperature (smooth-bore);
All these types can be:
— electrically bonded, in which case the hose is additionally designated and marked with the symbol M:
— electrically conducting by virtue of a conducting rubber layer, in which case the hose is additionally designated and marked with the symbol fi;
— electrically discontinuous.
5 Materials and construction of hose and hose assembly The hose shall consist of the following:
— a lining of rubber resistant to n-pentane;
— a reinforcement of layers of woven, braided or spirally wound textile material or braided or spirally wound wire;
— a cover of black or coloured synthetic rubber, resistant to abrasion and outdoor exposure;
— for hoses designated M only, they shall additionally have two or more low-resistance electrical- bonding wires;
— for hoses designated fi only, cover and/or lining shall be conducting rubber;
— the cover shall be being pricked or unpricked to allow gas permeation; if the cover is unpricked a comparative measurement of permeation between the rubber materials of cover and lining shall be carried out, see Table3.
— for hoses types D and D-LT the materials and construction shall be as described above.ISO 2928 pdf download.
Tags: Rubber hoses and hose assemblies for liquefied petroleum gas
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