ISO 6805:2020 pdf download

ISO 6805:2020 pdf download

ISO 6805:2020 pdf download.Rubber hoses and hose assemblies for underground mining — Wire-reinforced hydraulic types for coal mining — Specification
1 Scope
This document specifies requirements for wire-reinforced hoses and hose assemblies for underground coal mining applications of nominal sizes 6,3 to 51 for use with:
— oil-based hydraulic fluids HH, HL, HM, HR and HV as defined in ISO 6743-4 at temperatures ranging from −40 °C to +120 °C;
— water-based fluids HFC, HFAE, HFAS and HFB as defined in ISO 6743-4 at temperatures ranging from −40 °C to +70 °C;
— water at temperatures ranging from 0 °C to +70 °C.
There is a possibility that operation at the extremes of or outside these temperature ranges materially reduce the life of the hose. These hoses are not suitable for use with fluids that have a castor oil or ester base.
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 8030, Rubber and plastics hoses — Method of test for flammability
ISO 8031, Rubber and plastics hoses and hose assemblies — Determination of electrical resistance and conductivity
ISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
ISO 18752, Rubber hoses and hose assemblies — Wire- or textile-reinforced single-pressure types for hydraulic applications — Specification
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 8330 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at http:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Classification
4.1 Classes
Hoses shall be selected from the classes of hose listed in ISO 18752, distinguished by their maximum working pressure.
4.2 Grades and types
Hoses shall be selected from the grades of hose and the types classified by the outside diameter as listed in ISO 18752.
5 Materials and construction
5.1 Hoses
Hoses shall consist of a hydraulic-fluid-resistant rubber lining, one or multiple layers of steel wire reinforcement, and an oil-, abrasion- and weather-resistant rubber cover. A layer of other materials on the rubber cover is allowed for improved resistance to abrasion or other properties. The hose shall be conductive and fire-resistant.
5.2 Hose assemblies
Hose assemblies shall only be manufactured using hose fittings which conform to the requirements of ISO 18752. Hose fittings shall be matched to the hose and assembled in accordance with the manufacturer’s instructions for the proper preparation and fabrication of hose assemblies. Hose assemblies shall meet the frequency testing specified in Clause 7.