GB/T 3683-2023Rubber hoses and hose assemblies - Wire-braid-reinforced hydraulic types for oil-based or water-based fluids - Specification (English PDF)

Foreword

This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for

Standardization - Part 1.Rules for the Structure and Drafting of Standardizing Documents.

This Document replaced GB/T 3683-2011 Rubber Hoses and Hose Assemblies - Wire-Braid-

Reinforced Hydraulic Types for Oil-Based or Water-Based Fluids - Specification. Compared

with GB/T 3683-2011, the major technical changes of this Document are as follows besides t

he structural adjustments and editorial modifications.

--- Change "R1ATS" to "R1AT"; and change "R2ATS" to "R2AT" (see Clause 4, 6.1, Clause

7 of this Edition; Clause 4, 6.2, Clause 7 of the 2011 Edition);

--- Change the scope; increase the upper limit temperature of water-based hydraulic fluid

from +60 degrees C to +70 degrees C; and add the relevant requirements for the fluid medium to be

water (see Clause 1 of this Edition; Clause 1 of the 2011 Edition);

--- Add hoses with a nominal inner diameter of 76 and relevant requirements (see 6.1 of this

Edition);

--- Change the maximum working pressure, verification pressure and minimum burst

pressure in Table 4 to the most common standard pressure (see 7.2 of this Edition; 7.2 of

the 2011 Edition);

--- Change the measurement method of the minimum bending radius (see 7.3 of this Edition;

1 Scope

This Document specifies the requirements for 6 types of steel wire braided reinforced hoses

and hose assemblies with nominal inner diameters of 5 ~ 51.This Document also specifies

Type-2SN and Type-R2AT hoses with a nominal inside diameter of 63 and Type-2SN hose with

a nominal inside diameter of 76.

2 Normative References

The provisions in following documents become the essential provisions of this Document

through reference in this Document. For the dated documents, only the versions with the dates

indicated are applicable to this Document; for the undated documents, only the latest version

(including all the amendments) is applicable to this Document.

3 Terms and Definitions

For the purposes of this Document, the terms and definitions given in ISO 8330 apply.

4 Classification

According to different structures, working pressure and oil resistance, hoses are divided into 6

types.

5 Materials and Structures

Hose assemblies shall be manufactured from hose meeting the requirements of this Document.

Hose assemblies shall be manufactured using only hose joint whose functionality has been

verified in accordance with 7.2, 7.4, 7.5 and 7.6.Manufacturer's instruction manual shall be

followed when preparing and assembling hose assemblies.

6 Dimensions

The length of supply of hoses and hose assemblies shall be agreed between the manufacturer

and the purchaser.

7 Performance Requirements

When the hose is bent to the minimum bending radius given in Table 5, the measurement shall

be carried out according to Method-A1 in Clause 4 of ISO 10619-1.2017.In the bending state,

the hose shall meet the requirements for pulse and low temperature deflection specified in 7.4

The outer layer of the hose shall be inspected for visible defects and the hose shall be properly

labeled and marked. Additionally, the hose assemblies shall be inspected to confirm that the

correct assemblies are installed.

8 Inspection Frequency

Type inspection and routine inspection shall comply with the provisions in Appendix A.

Type inspection is used to verify that hoses manufactured using a specific design method and

specific production process meet all the requirements of this Document.

9 Marking

Hose assemblies that comply with the requirements of this Document shall be permanently

marked with at least the following information.

Appendix A

(Normative)

Type Inspection and Routine Inspection

The type inspection and routine inspection of production hoses are shown in Table A.1.

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