GB/T 42086.2-2022Connections for hydraulic fluid power - Flange connections - Part 2: Series of 42 MPa, DN13 to DN76 (English PDF)

foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules for Standardization Documents"

drafting.

This document is part 2 of GB/T 42086 "Flanged Connections for Hydraulic Transmission Connections". GB/T 42086 has issued the following

part.

---Part 1.3.5MPa~35MPa, DN13~DN127 series;

--- Part 2.42MPa, DN13~DN76 series.

This document is modified to adopt ISO 6162-2.2018 "Hydraulic transmission belt split or integral flange clamp, using metric or inch thread

Flange Connections Part 2.Flange Connections, Oil Ports, Mounting Surfaces for 42MPa (420bar), DN13~DN76".

The technical differences between this document and ISO 6162-2.2018 and their reasons are as follows.

--- Replaced ISO 5598 (see Chapter 3, Table 1, Table 2) with the normatively quoted GB/T 17446 to adapt to my country's technical regulations

components to improve operability;

--- ISO 4762, GB/T 3098.1 replaced ISO 898-1, GB/T 5783 replaced by GB/T 70.1 with normative references

Changed ISO 4017 (see 4.3) to adapt to my country's technical conditions and improve operability;

--- Replaced ISO 3601-3 (see 4.4) with the normatively quoted GB/T 3452.2 to adapt to my country's technical conditions and improve operability

active;

--- Replaced ISO 48 (see 4.4) with the normatively quoted GB/T 6031 to adapt to my country's technical conditions and improve operability;

--- Replaced ISO 7089 (see 4.6, Table 2) with the normatively quoted GB/T 97.1 to adapt to the technical conditions of our country and improve the reliability

operability;

--- Replaced ISO 2768-1 (see 6.6) with the normatively quoted GB/T 1804 to adapt to my country's technical conditions and improve operability

active;

--- Replaced ISO 9227 (see 7.1, 7.2) with the normatively quoted GB/T 10125 to adapt to my country's technical conditions and improve reliability

operability;

--- Replaced ISO 1302 (see 7.7, Figure 6) with the normatively quoted GB/T 131 to adapt to my country's technical conditions and improve operability

active;

--- Replaced ISO 19879 (see 8.1) with the normatively quoted GB/T 26143 to adapt to my country's technical conditions and improve operability

active;

--- Increased the marking requirements of DN25 type 2 (imperial) FC and FCS flange clamps (see 9.2) to adapt to the technical conditions of our country,

Improve operability;

--- Added the marking requirements for the oil port mounting surface of type 2 (inch) flange connection (see 9.3) to adapt to the technical conditions of our country and improve

Operability;

---Changed the naming rules of split flange clamps (see 10.1) to adapt to the technical conditions of our country and improve operability;

--- Changed the nomenclature of the integral flange clamp (see 10.2) to adapt to the technical conditions of our country and improve operability;

--- Replaced ISO 261 (see Table 1) with the normatively quoted GB/T 193 to adapt to my country's technical conditions and improve operability;

--- Replaced ISO 724 (see Table 1) with the normatively quoted GB/T 196 to adapt to my country's technical conditions and improve operability;

--- Replaced ISO 263 (see Table 2) with the normatively quoted GB/T 20670 to adapt to my country's technical conditions and improve operability

active.

The following editorial changes have also been made to this document.

---Change the name of the standard to "Hydraulic Transmission Connection Flange Connection Part 2.42MPa, DN13~DN76 Series";

--- Deleted the note in 9.1.

Please note that some contents of this document may refer to patents. The issuing agency of this document assumes no responsibility for identifying patents.

Introduction

In the hydraulic system, the flanged pipe joint is an important hydraulic component for pipeline connection, which not only requires safety, reliability and no leakage, but also requires

Realize serialization and standardization. GB/T 42086 aims to standardize the general requirements and dimensions of flange connections, and is intended to be composed of three parts.

---Part 1.3.5MPa~35MPa, DN13~DN127 series. The purpose is to determine the pressure of 3.5MPa~35MPa, etc.

Flanges for two-piece and one-piece flange clip-type hard pipe joints and hose joints (DN13~DN127) for four-screw fastening

general requirements and

Dimensional specifications, as well as the size of the sealing ring and sealing groove used together.

--- Part 2.42MPa, DN13~DN76 series. The purpose is to determine the pressure level of 42MPa, which is used for four-screw fastening

One-piece and one-piece flange clamp type hard pipe joints and flange heads of hose joints (DN13~DN76), split flange clamps (FCS and

FCSM), one-piece flange clamps (FC and FCM), general requirements and dimensional specifications for oil ports and mounting surfaces, and the associated

Dimensions of seal ring and seal groove.

--- Part 3.42MPa, DN25~DN80 square series. The purpose is to determine the square flange with 42MPa pressure rating

(DN25~DN80) general requirements and size specifications, as well as the size of the sealing ring and sealing groove used together.

Hydraulic transmission connection flange connection

Part 2.42MPa, DN13~DN76 series

1 Scope

This document specifies the method for hard pipe joints and hose joints (DN13~DN76) of the four-screw fastening flange clamp type at 42MPa.

General requirements and dimensions for flange heads, split flange clamps (FCS and FCSM), integral flange clamps (FC and FCM), ports and mounting surfaces; also

It specifies the requirements and dimensions of the sealing rings and sealing grooves used together.

This document applies to connections for hydraulic systems of industrial and commercial products where threaded pipe joints are not convenient.

Note. This document recommends the use of metric thread fasteners (type 1, DN13~DN76), and also provides the use of existing inch thread fasteners (type 2, DN13~DN76).

DN51) method.

2 Normative references

The contents of the following documents constitute the essential provisions of this document through normative references in the text. Among them, dated references

For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

this document.

GB/T 70.1 Hexagon socket head cap screws (GB/T 70.1-2008, ISO 4762.2004, MOD)

GB/T 97.1 Flat Washer Grade A (GB/T 97.1-2002, eqvISO 7089.2000)

GB/T 131 Product Geometry Technical Specification (GPS) Representation of Surface Structure in Technical Product Documentation (GB/T 131-2006,

ISO 1302.2002, IDT)

GB/T 193 Common thread diameter and pitch series (GB/T 193-2003, ISO 261.1998, MOD)

GB/T 196 Basic dimensions of ordinary thread (GB/T 196-2003, ISO 724.1993, MOD)

GB/T 1804 General tolerances Tolerances of linear and angular dimensions without tolerances (GB/T 1804-2000, eqvISO 2768-1.

1989)

GB/T 3098.1 Mechanical properties of fasteners Bolts, screws and studs (GB/T 3098.1-2010, ISO 898-1.2009,

MOD)

GB/T 3452.2 O-ring rubber seals for hydraulic and pneumatic use Part 2.Specifications for inspection of appearance quality (GB/T 3452.2-2007,

ISO 3601-3.2005, IDT)

GB/T 5783 Hexagon head bolts with full thread (GB/T 5783-2016, ISO 4017.2014, MOD)

GB/T 6031 Determination of hardness of vulcanized rubber or thermoplastic rubber (10IRHD~100IRHD) (GB/T 6031-2017,

ISO 48.2010, IDT)

GB/T 10125 Artificial atmosphere corrosion test Salt spray test (GB/T 10125-2021, ISO 9227.2017, MOD)

GB/T 17446 Vocabulary for fluid transmission systems and components (GB/T 17446-2012, ISO 5598.2008, IDT)

GB/T 20670 Unified thread diameter and thread number series (GB/T 20670-2006, ISO 263.1973, MOD)

GB/T 26143 Test method for hydraulic pipe joints (GB/T 26143-2010, ISO 19879.2010, IDT)

ISO 725 ISO inchscrewthreads-Basicdimensions

ISO 3601-1 O-rings for fluid power systems - Part 1.Bore diameter, cross-section, tolerances and designations (Fluidpowersys-

Note. GB/T 3452.1-2005 O-ring rubber seals for hydraulic and pneumatic use Part 1.Dimension series and tolerances (ISO 3601-1.2002, MOD)