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GB/T 40565.3-2021 English PDF (GBT40565.3-2021)

GB/T 40565.3-2021 English PDF (GBT40565.3-2021)

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GB/T 40565.3-2021: Connections for hydraulic fluid power. Quick-action couplings -- Part 3: Screw connection type for general purpose

This document specifies the dimensions and requirements of general-purpose screw connection type of hydraulic quick-action couplings. This document is applicable to the screw connection type of quick-action couplings for general-purpose hydraulic equipment.
GB/T 40565.3-2021
GB
NATIONAL STANDARD OF THE
PEOPLE REPUBLIC OF CHINA
ICS 23.100.40
CCS J 20
Connections for Hydraulic Fluid Power - Quick-action
Couplings - Part 3: Screw Connection Type for General
Purpose
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[ISO 14541:2013, Hydraulic Fluid Power - Dimensions and Requirements for Screw- to-connect Quick-action Couplings for General Purpose, MOD]
ISSUED ON: OCTOBER 11, 2021
IMPLEMENTED ON: MAY 1, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the PEOPLE Republic of China.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative References ... 6
3 Terms and Definitions ... 6
4 Dimensional Requirements ... 7
5 Performance Requirements ... 8
6 Installation Instructions ... 9
7 Identification ... 10
8 Marking ... 10
9 Labeling Instructions ... 11
Foreword
This document was drafted in accordance with the rules of GB/T 1.1-2020 Directives for Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents. This document is Part 3 of GB/T 40565 Connections for Hydraulic Fluid Power - Quick-action Couplings. GB/T 40565 has issued the following parts:
---Part 2: Flush-face Type at 20 MPa to 31.5 MPa;
---Part 3: Screw Connection Type for General Purpose;
---Part 4: Screw Connection Type at 72 MPa.
This document uses the re-drafting method in the modification and adoption of ISO 14541:2013 Hydraulic Fluid Power - Dimensions and Requirements for Screw-to-connect Quick-action Couplings for General Purpose.
The technical differences between this document and ISO 14541:2013, and the causes for these differences are as follows:
---In terms of Normative References, this document makes adjustments with technical differences, so as to adapt to the technical conditions of China. The adjustments are intensively reflected in Chapter 2 ?€?Normative References?€?. See the specific adjustments below:
a) GB/T 197, which modifies and adopts international standard, is used to replace ISO 965-1 (see Table 1);
b) GB/T 196, which modifies and adopts international standard, is used to replace ISO 724 (see Table 1);
c) GB/T 17446, which identically adopts international standard, is used to replace ISO 5598 (see Chapter 3);
d) ISO 18869 is used to replace ISO 7241-2 (see 5.3, 5.4, 5.5, 5.6, 5.7 and 5.8); e) The reference to GB/T 2351 is added (see 4.2);
f) The reference to ISO 1302 in ISO 14541:2013 is deleted (see 4.1 of ISO 14541:2013).
This document makes the following editorial modifications:
---The title of the Standard is modified into Connections for Hydraulic Fluid Power - Quick-action Couplings - Part 3: Screw Connection Type for General Purpose; ---The unit of pressure ?€?bar?€? is deleted.
Connections for Hydraulic Fluid Power - Quick-action
Couplings - Part 3: Screw Connection Type for General
Purpose
1 Scope
This document specifies the dimensions and requirements of general-purpose screw connection type of hydraulic quick-action couplings.
This document is applicable to the screw connection type of quick-action couplings for general- purpose hydraulic equipment.
2 Normative References
The contents of the following documents constitute indispensable clauses of this document through the normative references in the text. In terms of references with a specified date, only versions with a specified date are applicable to this document. In terms of references without a specified date, the latest version (including all the modifications) is applicable to this document. GB/T 196 General Purpose Metric Screw Threads - Basic Dimensions (GB/T 196-2003, ISO 724:1993, MOD)
GB/T 197 General Purpose Metric Screw Threads - Tolerances (GB/T 197-2018, ISO 965- 1:2013, MOD)
GB/T 2351 Fluid Power Systems and Components - Outside Diameters of Tubes and Inside Diameters of Hoses (GB/T 2351-2021, ISO 4397:2011, IDT)
GB/T 17446 Fluid Power Systems and Components - Vocabulary (GB/T 17446-2012, ISO 5598:2008, IDT)
ISO 18869 Hydraulic Fluid Power - Test Methods for Couplings Actuated with or without Tools 3 Terms and Definitions
What is defined in GB/T 17446, and the following terms and definitions are applicable to this document.
3.1 fluid loss
Fluid loss refers to the amount of fluid that leaks when the quick-action couplings are

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