UNI EN ISO 8434-4 : 2002

Committees responsible
National foreword
Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Requirements for materials
5 Pressure/temperature requirements
6 Designation of fittings
7 Requirements for tubes
8 Across-flats dimensions
9 Design
10 Screw threads
11 Manufacture
12 Assembly instruction
13 Procurement information
14 Marking of components
15 Identification statement (Reference to this part of
      ISO 8434)
Annex A (normative) Port and stud end working pressures and
                    combinations of tube outside diameters
                    and port and stud end thread sizes
Annex ZA (normative) Normative references to International
                     publications with their relevant
                     European publications
Figure 1 - Cross-section of typical 24 degree cone connector
           with O-ring weld-on nipple
Figure 2 - Straight fitting
Figure 3 - Straight stud fitting
Figure 4 - Tee
Figure 5 - Elbow
Figure 6 - Reducing swivel adapter
Figure 7 - Reducing stud fitting
Figure 8 - Compression end and weld-on nipple details
Figure 9 - O-ring
Figure 10 - S and L series swivel stud straight adapter
            (SWSDS) with stud end per ISO 1179-2 or ISO
            9974-2
Figure 11 - Swivel stud straight adapter (SWSDS) with stud
            end per ISO 6149-2 (S series) or ISO 6149-3 (L
            series)
Figure 12 - Swivel elbow (SWE), swivel branch tee (SWBT) and
            swivel run tee (SWRT)
Figure 13 - Reducing swivel straight adapter (RESWS)
Figure 14 - Weld-on reducing nipple (WDRE)
Figure 15 - Components for use with weld-on nipples and
            swivel nut fittings (see ISO 8434-1 for
            dimensions)
Figure 16 - Components for use with weld-on nipples and
            swivel nut fittings (see ISO 8434-1 for
            dimensions)
Figure 17 - Components for use with weld-on nipples and
            swivel nut fittings (see ISO 8434-1 for
            dimensions)
Table 1 - Working pressures for carbon and stainless steel
          24 degree cone connectors with O-ring weld-on
          nipples
Table 2 - Working pressure for carbon and stainless steel
          weld-on nipples with various tube wall thicknesses
Table 3 - Pressure derating for fittings made from stainless
          steel and used at temperatures outside the ranges
          given in 5.1 and 5.2
Table 4 - Dimensions of weld-on nipples
Table 5 - Dimensions of O-rings
Table 6 - Dimensions of S and L series swivel stud straight
          adapters with stud ends per ISO 1179 or ISO 9974-2
Table 7 - Dimensions of swivel stud straight adapters with
          stud ends per ISO 6149-2 (S series) or ISO 6149-3
          (L series)
Table 8 - Dimensions of swivel elbows, swivel branch tees and
          swivel run tees
Table 9 - Dimensions of L and S series reducing swivel
          straight adapters
Table 10 - Dimensions of L and S series weld-on reducing
           nipples
Table A.1 - Values for fluid power and general use
Table A.2 - Values for general use only

Defines general and dimensional requirements for the design and performance of 24 degree cone connectors with O-ring weld-on nipples to be used with steel and stainless steel tubes having outside diameters from 6mm to 42mm, inclusive. To be used in fluid power and general application requiring elastomeric seals, within pressure and temperature limits as specified.