BS EN 853:2015 pdf free download

BS EN 853:2015 pdf free download.Rubber hoses and hose assemblies – Wire braid reinforced hydraulic type – Specification.
3 Types of hoses
Four types of hoses are specified:
1) Type 1ST – hoses with a single braid of wire reinforcement,
2) Type 2ST – hoses with two braids of wire reinforcement:
3) Type 1SN – hoses with a single braid of wire reinforcement:
4) Type 2SN – hoses with two braids of wire reinforcement.
Types 1 SN and 2SN shall be of the same reinforcement construction as types 1ST and 2ST. except that they shall have thinner covers designed to assemble with fittings that do not require removal of the cover or a portion of the cover.
4 Materials and construction
4.1 Hoses
Hoses shall consist of an oil and water resistant synthetic rubber lining, one or two layers of high tensile steel wire and an oil and weather resistant rubber cover.
4.2 Hose assemblies
Hose assemblies shall only be manufactured with those hose fittings whose functionality has been verified in
accordance with subclauses 6.1, 6.3, 6.4 and 6.5 of this European Standard. 5 Dimensions
5.1 Diameters and concentricity
When measured in accordance with EN ISO 4671, the diameters of the hoses shall conform to the values given in Table 1.
5.2 Length
5.2.1 Hoses
Hoses shall be supplied in lengths as specified by the purchaser. subject to a tolerance on the specified lengths of ± 2 %.
When no specific hose lengths have been ordered, the percentages of different lengths in any given delivery shall be as follows:
— over 20 m : not less than 80 % of total length;
— over 10 m to 20 m : not more than 20 % of total length;
— lmtol0m :notmorethan3%of total length.
The length of hose shall be at least 1 m.
5.2.2 Hose assemblies
The tolerances on the length of hose assemblies shall conform to Table 3.
6.2 Minimum bend radius
When bent to the minimum bend radius given in Table 5 measured on the inside of the bend, the flatness shall not exceed 10 % of the original outside diameter.
Measure the hose outside diameter with a calliper before bending the hose. Bend the hose to the minimum bend radius and measure the flatness with the calliper.BS EN 853 pdf free download.