GB/T 40565.2-2025 (GB/T 40565.2-2021) English PDF
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GB/T 40565.2: Historical versions
| Standard ID | USD | BUY PDF | Delivery | Standard Title (Description) | Status |
| GB/T 40565.2-2025 | 279 | Add to Cart | 3 days | Connections for hydraulic fluid power - Quick-action couplings - Part 2: Flush-face type | Valid |
| GB/T 40565.2-2021 | 125 | Add to Cart | Auto, 9 seconds. | Connections for hydraulic fluid power. Quick-action couplings - Part 2: Flush-face type at 20 MPa to 31.5 Mpa | Valid |
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GB/T 40565.2-2021: Connections for hydraulic fluid power. Quick-action couplings - Part 2: Flush-face type at 20 MPa to 31.5 Mpa
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GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 23.100.40 CCS J 20 Connections for Hydraulic Fluid Power - Quick-action Couplings - Part 2.Flush-face Type at 20 MPa to 31.5 MPa 液压传动连接 快换接头 [ISO 16028.1999, Hydraulic Fluid Power - Flush-face Type, Quick-action Couplings for Use at Pressures of 20 MPa (200 bar) to 31.5 MPa (315 bar) - Specifications, MOD] Issued on: OCTOBER 11, 2021 Implemented on: MAY 1, 2022 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s 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 Identification... 10 7 Marking... 10 8 Labeling Instructions... 10Foreword
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 2 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 16028.1999 Hydraulic Fluid Power - Flush-face Type, Quick-action Couplings for Use at Pressures of 20 MPa (200 bar) to 31,5 MPa (315 bar) - Specifications. This document incorporates the amendments to ISO 16028.1999/Amd 1.2006.The clauses, to which, these amendments relate, are marked by a double vertical line (||) in the outer margins. The technical differences between this document and ISO 16028.1999, 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 2351, which identically adopts international standard, is used to replace ISO 4397 (see Chapter 4); b) GB/T 7937, which modifies and adopts international standard, is used to replace ISO 4399 (see Table 2); 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 5.2, 5.3, 5.4, 5.5 and 5.6). ---The term and definition of “fluid loss” is added (see 3.1); ---The content of identification and marking is added (see Chapter 6 and Chapter 7). This document makes the following editorial modifications. ---The title of the Standard is modified into Connections for Hydraulic Fluid Power - Quick-action Couplings - Part 2.Flush-face Type at 20 MPa to 31.5 MPa; Connections for Hydraulic Fluid Power - Quick-action Couplings - Part 2.Flush-face Type at 20 MPa to 31.5 MPa1 Scope
This document specifies the dimensions and requirements of different specifications of flush- face type hydraulic quick-action couplings under a pressure of 20 MPa ~ 31.5 MPA. This document is applicable to flush-face type hydraulic quick-action couplings for connecting or disconnecting without pressure. NOTE. when the quick-action couplings are disconnected in the connected state, the separated coupling end automatically seals the upstream and downstream fluids.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 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 7937 Fluid Power Systems and Components - Connectors and Associated Components - Nominal Pressures (GB/T 7937-2008, ISO 4399.1995, MOD) 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 Tools3 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 disconnected. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
