GB/T 2878.2-2011
ActiveConnections for hydraulic fluid power—Ports and stud ends with metric threads and O-ring sealing—Part 2: Heavy-duty stud ends (S series)
液压传动连接 带米制螺纹和O形圈密封的油口和螺柱端 第2部分：重型螺柱端(S系列)
Catalogue
前言 → 引言 → 1 范围 → 2 规范性引用文件 → 3 术语和定义 → 4 尺寸 → 5 要求 → 6 O形圈 → 7 试验方法 → 8 标记 Foreword → Introduction → 1 Scope → 2 Normative References → 3 Terms and Definitions → 4 Dimensions → 5 Requirements → 6 O-rings → 7 Test Methods → 8 Marking
Scope
This part of GB/T 2878 specifies the dimensions, performance requirements and test procedures for metric adjustable and non-adjustable heavy-duty (S series) stud ends and O-rings. Non-adjustable stud ends conforming to this part are suitable for a maximum working pressure of 63 MPa (630 bar), and adjustable stud ends are suitable for a maximum working pressure of 40 MPa (400 bar). The allowable working pressure shall be determined based on conditions such as stud end dimensions, material, structure, working conditions and application. Products that only conform to the dimensions of this part cannot guarantee to achieve the rated performance. Manufacturers should test according to the specifications contained in this part to ensure that the components meet the rated performance.
GB/T 2878的本部分规定了米制可调节和不可调节重型(S系列)螺柱端及O形圈的尺寸、性能要求和试验程序。符合本部分的不可调节螺柱端适用于最高工作压力63 MPa(630 bar)，可调节螺柱端适用于最高工作压力40 MPa(400 bar)。许用工作压力应根据螺柱端尺寸、材料、结构、工作条件和应用场合等条件来确定。仅符合本部分尺寸的产品不能保证能达到额定性能。制造商宜按照本部分所包含的规范进行试验，以确保元件符合额定性能。
Normative References
Keywords
Application Summary AI generated
Hydraulic component manufacturers and system designers use this standard to design and manufacture heavy-duty stud end connections, ensuring reliable sealing and pressure-bearing capacity between ports and tube fittings in hydraulic systems. By specifying uniform dimensions and performance requirements, the standard helps improve interchangeability of hydraulic components and system safety, preventing leaks or accidents caused by connection failures.
液压元件制造商和系统设计人员使用本标准来设计和制造重型螺柱端连接件，确保液压系统中油口与管接头之间的可靠密封和压力承载能力。该标准通过规定统一的尺寸和性能要求，有助于提高液压元件的互换性和系统安全性，避免因连接失效导致的泄漏或事故。
AI Summary AI generated
GB/T 2878.2-2011 is part of the standard for hydraulic fluid power connections, specifically specifying technical requirements for heavy-duty (S series) stud ends. The standard defines dimensions, performance requirements and test methods for both adjustable and non-adjustable stud ends, with maximum working pressures of 63 MPa for non-adjustable and 40 MPa for adjustable types. It also specifies dimensions and material requirements for matching O-rings, as well as pressure ratings for carbon steel stud ends under different thread sizes. This standard, modified from ISO 6149-2:2006, is important for standardizing the design and selection of hydraulic system connections.
GB/T 2878.2-2011是液压传动连接标准的一部分，专门规定重型(S系列)螺柱端的技术要求。该标准定义了可调节和不可调节两种螺柱端的尺寸、性能要求和试验方法，不可调节型最高工作压力63 MPa，可调节型40 MPa。标准还规定了配套O形圈的尺寸和材料要求，以及碳钢制造的螺柱端在不同螺纹规格下的压力等级。该标准修改采用ISO 6149-2:2006，对规范液压系统连接件的设计和选型具有重要意义。
Key Sentences extracted from text
GB/T 2878的本部分规定了米制可调节和不可调节重型(S系列)螺柱端及O形圈的尺寸、性能要求和试验程序。
符合本部分的不可调节螺柱端适用于最高工作压力63 MPa(630 bar)，可调节螺柱端适用于最高工作压力40 MPa(400 bar)。
仅符合本部分尺寸的产品不能保证能达到额定性能。
用碳钢制造的重型(S系列)螺柱端应在表2所给的最高工作压力下使用。
除非另有规定，在第5章和表2要求的压力下，当与石油基液压油一起使用和试验时，所用O形圈应由丁腈橡胶制造，硬度为(90±5)IRHD。
This part of GB/T 2878 specifies the dimensions, performance requirements and test procedures for metric adjustable and non-adjustable heavy-duty (S series) stud ends and O-rings.
Non-adjustable stud ends conforming to this part are suitable for a maximum working pressure of 63 MPa (630 bar), and adjustable stud ends are suitable for a maximum working pressure of 40 MPa (400 bar).
Products that only conform to the dimensions of this part cannot guarantee to achieve the rated performance.
Heavy-duty (S series) stud ends made of carbon steel shall be used at the maximum working pressures given in Table 2.
Unless otherwise specified, when used and tested with petroleum-based hydraulic fluids at the pressures required in Clause 5 and Table 2, the O-rings used shall be made of nitrile rubber with a hardness of (90±5) IRHD.