ISO 2974 pdf download

ISO 2974 pdf download Diesel engines — 60 degree female cones for high-pressure fuel injection components
Scope
This International Standard specifies the dimensional requirements of end-connections for highpressure fuelinjection equipment components, used on diesel (compression-ignition) engines.
lt is applicable to externally threaded 60° female cones (see Figures 1, 2, 5 and 6) and intended for usewith high-pressure fuel injection pipe assemblies with tube outside diameters of
up to and including 12 mm for integral female cones (see Table 1), and
up to and including 9 mm for fabricated female cones (see Table 2).
Details of the pipe connection ends referenced in this document are shown in ISO 13296.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application, For dated references, only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies.
ISO 261, ISO general purpose metric screw threads – General planSO 3508, Thread run-outs for fasteners with thread in accordance with ISO 261 and ISO 262ISO 13296,Dieselengines– High-pressurefuelinjection pipe assemblies– Generalrequirements anddimensions
3 Terms and definitions
For the purposes ofthis document, the following terms and definitions apply.
3.1
integral female cone
female cone where the sealing cone and the thread are connected in the same part
Note 1 to entry: See Figures 1 and 2
3.2
fabricated female conefemale cone where the sealing cone and the thread are separate parts prior to joining, e.g. by welding
Note 1 to entry: See Figures 5 and 6.
3.3reference diameter5baseline for dimensioning of the female cone and the pipe end form
Note 1 to entry: S may or may not be coincident with the intended nominal sealing interface between the femalecone and the pipe end form.
4 Requirements
4.1 Dimensions and tolerances
The following figures indicate the requirements for the 60° female cones at fuel injectors, CR-injectors.fuel injection pumps, high-pressure supply pumps, and rails to allow interchangeability for highpressure fuelinjection pipe assemblies according to ISO 13296:
Figures 1, 2, 3, and 4 for integral female cones;
Figures 5, 6, and 7 for fabricated female cones.
The 60° female cone and its relationship to the external thread shall meet the requirements of Figure 1integral female cones) or Figure 5 (fabricated female cones). However, for integral female conesvariations at the smaller end of the female cone as shown in Figure 3 are acceptable.
Dimensions and tolerances are given in Table 1 (integral female cones) and Table 2 (fabricated femalccones) Unspecified details are left to the manufacturer’s choice
With reference dimension Tin Figures 1, 2, 5 and 6, the external thread may be either with or withoutundercut. However. t shal be possible to screw the GO-gauge for the thread un to the plane specifiedby dimension T:
Figure 4 and Figure 7 show the assemblies with pipe end connections for the integral and fabricatecfemale cone types,respectively.
4.2 Materials
The specification of material and heat treatment shall be made according to the intended use. To ensuretiphtness of the joint between the connection end of the high-pressure pipe and the female cone of themating part of pump, injector, or rail for the initial assembly as well as for repeated assemblies, thenecessary plastic deformation shall take place at the sealing face of the high-pressure pipe.
COITT