Foreword
This document has been drafted in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents".
This document is Part 1 of GB/T 42086 "Hydraulic Transmission Connections - Flange Connections".GB/T 42086 has published the following parts:
--Part 1:3.5 MPa~35 MPa, DN13~DN127 series;
--Part 2:42 MPa, DN13~DN76 series.
This document modifies ISO 6162-1:2012 "Hydraulic drives with split or integral flange clamps, flange connections using metric or imperial threads, Part 1: Flange joints for 3.5 MPa (35 bar) to 35 MPa (350 bar), DN13 to DN127, oil ports, mounting surfaces".
This document has been restructured in comparison with ISO 6162-1:2012 as follows;
--4.5 corresponds to note 4.4 of ISO 6162-1:2012, 4.6 corresponds to 4.5 of ISO 6162-1:2012. the technical differences between this document and ISO 6162-1:2012 and the reasons for them are as follows:
--Replacement of ISO 5598 (Bay Chapter 3, Table 1, Table 2) with the normative reference GB/T 17446, in order to adapt to the technical conditions in China
The ISO 5598 (Chapter 3, Table 1, Table 2) has been replaced by the normative reference GB/T 17446 to adapt to China's technical conditions and improve operability;
--Replacement of ISO 4762 by GB/T 70.1 for normative references, GB/T 3098.1 for ISO 898-1, GB/T 5783 for ISO 4017 (see
ISO 4017 was replaced by GB/T 3098.1 (see 4.3) to adapt to the technical conditions in China and to improve operability;
--Replaced ISO 48 with normative references GB/T 6031 and ISO 3601-3 with GB/T 3452.2 (see 4.4), in order to adapt to China's technical conditions and improve operability; --Replaced ISO 48 with normative references GB/T 6031 and ISO 3601-3 with GB/T 3452.2 (see 4.4).
to adapt to the technical conditions in China and to improve operability;
--Replaced ISO 7089 with normative reference GB/T 97.1 (see 4.6, Table 2) to adapt to China's technical conditions and improve operability; --Replaced ISO 7089 with normative reference GB/T 97.1 (see 4.6, Table 2) to adapt to China's technical conditions and improve operability
The ISO 7089 was replaced by the normative reference GB/T 97.1 (see 4.6, Table 2) to adapt to our technical conditions and improve operability;
--Replacement of ISO 2768-1 with normative reference GB/T 1804 (see 6.6) to adapt to China's technical conditions and improve operability; --Replacement of ISO 2768-1 with normative reference GB/T 1804 (see 6.6) to adapt to China's technical conditions and improve operability
The ISO 2768-1 (see 6.6) has been replaced by the normative reference GB/T 1804 to adapt to our technical conditions and improve operability;
--Replacement of ISO 9227 (see 7.1 and 7.2) with the normative reference GB/T 10125 to adapt to China's technical conditions and improve operability;
--Replacement of ISO 1302 with the normative reference GB/T 13l (see 7.7, Fig. 6) to adapt to the technical conditions in China and to improve operability; --Replacement of ISO 1302 with the normative reference GB/T 13l (see 7.7, Fig. 6) to adapt to the technical conditions in China and to improve operability
The ISO 1302 was replaced by the normative reference GB/T 13l (see 7.7, Figure 6) to adapt to our technical conditions and improve operability;
--Replacement of ISO 19879 (see 8.1) with the normative reference GB/T 26143 to adapt to the technical conditions in China and to improve operability; --Replacement of ISO 19879 (see 8.1) with the normative reference GB/T 26143 to adapt to the technical conditions in China and to improve operability
The technical conditions in China have been adapted to improve operability;
--The marking requirements for type 2 (imperial) FC and FCS flange clamps DN 32 (see 9.2) have been added to adapt to our technical conditions and to improve operability; --The marking requirements for type 2 (imperial) FC and FCS flange clamps DN 32 have been added to adapt to our technical conditions and to improve operability
To improve operability
--Deleted examples of flange port and flange head markings.
Please note that some parts of this document may be patent related. The issuer of this document is not responsible for identifying patents. This document is proposed by the China Machinery Industry Federation.
This document is the responsibility of the National Technical Committee for Standardisation of Hydraulic Pneumatics (SAC/TC3).
Introduction
GB/T42086 is intended to standardize the general requirements and dimensions of flanged joints and is intended to consist of three parts.
--Part 1: 3.5 MPa ~ 35 MPa, DN13 ~ DN127 series. The purpose is to determine the 3.5 MPa ~ 35 MPa pressure class, for four screw fastening split and integral flange clamp type hard and flexible pipe joints (DN13 ~ DN127) flange head, split flange clamp (FCS and FCSM), integral flange clamp (FC and FCM), port and mounting surface of the general requirements and dimensional specifications, as well as with the use of seals and sealing grooves dimensions of the seals and sealing grooves to be used.
--Part 2: 42 MPa, DN13 to DN76 series. The purpose is to determine the general requirements and dimensional specifications for flange heads, split and integral flange clamps (FCS and FCSM), integral flange clamps (FC and FCM), ports and mounting surfaces, as well as the dimensions of seals and sealing grooves for use with 42 MPa pressure class, split and integral flange clamp type hard and flexible pipe joints (DN13 to DN76).
--Part 3: 42 MPa, DN25 to DN80 square series. The purpose is to identify square flanges for the 42 MPa pressure class
(DN25~DN80) and the general requirements and dimensional specifications, as well as the dimensions of the seals and sealing grooves to be used in conjunction with them.
1 Scope
This document specifies for 3.5 MPa ~ 35 MPa, four screw fastening flange clamp type of hard pipe joints and flexible pipe joints (DN13 ~ DN127) flange head, split flange clamp (FCS and FCSM), one piece flange clamp (FC and FCM), oil port and mounting surface of the general requirements and dimensions; also specified with the use of seals and sealing groove requirements and dimensions.
This document applies to connections in hydraulic systems for industrial and commercial products where the use of threaded fittings is not convenient.
Note: This document recommends the use of metric threaded fasteners (type 1) and also provides a method for using the existing imperial threaded fasteners (type 2).
2 Normative references
The content of the following documents constitutes a low essential clause in this document through the normative references in the text. Among them, note the date of the cited documents, only the date of the corresponding version applies to this document; not note the date of the cited documents, the latest version (including all the revision of the list) applies to this document.
GB/T 70.1 Hexagon socket cheese head screws
GB/T 97.1 Flat washers grade A
GB/T 131 Product Geometry Specifications (GPS), Representation of surface structures in technical product documentation
GB/T 193 Common threads, diameter and pitch series
GB/T 196 Basic dimensions for common threads
GB/T 1804 General tolerances for linear and angular dimensions without tolerances
GB/T 3098.1 Mechanical properties of fasteners, bolts, screws and studs
GB/T 3452.2 O-ring rubber seals for hydraulic and pneumatic applications, part 2: appearance quality inspection specifications
GB/T 5783 Hexagonal head bolts, full thread
GB/T 6031 Determination of the hardness of vulcanized or thermoplastic rubber
GB/T 10125 Artificial atmosphere corrosion test, salt spray test
GB/T 17446 Glossary of fluid transmission systems and components
GB/T 20670 Uniform thread diameter and number of teeth series
GB/T 26143 Test methods for hydraulic fittings
3 Terms and definitions
The terms and definitions defined in GB/T 17446 apply to this document.
4 Materials
4.10 Flange connections assembled with split flange clamps and one-piece flange clamps are shown in Figure Ⅰ and Figure 2. split flange clamps (see Figure 3) and one-piece flange clamps (see Figure 4) should be of ferrous metal with the following characteristics in the finished state.
5 Selection
6Dimensions and tolerances
7 Surface requirements
8 Pressure / temperature requirements
9 Marking
10 Nomenclature of flanged joints and parts
Appendix A (informative) Recommended installation ranges and thread torques for flange joints conforming to this document
Appendix B (informative) О-ring designations and dimensions
Bibliography
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Materials
5 Selection
6Dimensions and tolerances
7 Surface requirements
8 Pressure / temperature requirements
9 Marking
10 Nomenclature of flanged joints and parts
Appendix A (informative) Recommended installation ranges and thread torques for flange joints conforming to this document
Appendix B (informative) О-ring designations and dimensions
Bibliography
