ISO 3861-2021 pdf free 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 sandand grit blasting,suitable for use up to a maximum working pressure of 0,63 MPa (6,3 bar) and over anoperating temperature range of -25 c to +70℃.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references, only the edition cited applies.Forundated 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 toleranceson 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 arotating cylindrical drum device
ISO4671, Rubber and plastics hoses and hose assemblies —Methods of measurement of the dimensions ofhoses 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 andconductivity
ISO 8033,Rubber and plastics hoses —Determination of adhesion between componentsISO 8330, Rubber and plastics hoses and hose assemblies — Vocabulary
ISo 10619-1:2017,Rubber and plastics hoses and tubing —Measurement of flexibility and stiffness —Part1: Bending tests at ambient temperature
IS0 10619-2:2017,Rubber and plastics hoses and tubing —Measurement of flexibility and stiffness—Part2: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.
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
一IEC Electropedia: available at http://www.electropedia.org/
4Classification
Hoses and hose assemblies are designated as one of the following grades depending on theirelectrical properties:
– electrically bonded — designated and marked”M” grade.
– electrically conductive, using a conductive rubber layer — designated and marked “o” grade.
5Materials and construction
The hose shall consist of:
– a rubber lining;
– a reinforcement of natural or synthetic textile, applied by any suitable technique;-a rubber cover.
Depending on the grade, the construction may contain a conductive rubber layer or a bonding wire orwires consisting of at least nine strands of a metal having a high resistance to fatigue.
The lining and cover shall be of uniform thickness, concentric to comply with the minimum thicknessspecified in 6.2 and 6.4.
The lining and cover shall be free from holes,porosity and other defects. The cover finish may besmooth or fabric-marked.
6Dimensions
6.1 Inside diameter and tolerances
When measured in accordance with ISO4671, the inside diameters and their tolerances shall conformto the values specified in Table 1.ISO 3861 pdf download.