BS EN 4801:2017 pdf download.Aerospace series – Flange couplings – Swivel flange with 3 fastening holes, in heat resisting steel – Inch series.
BS EN 4801 specifies the characteristics of swivel flanges, 3 holes, for flange couplings in heat resisting steel for inch series aerospace applications.
Nominal pressure: up to 21 000 kPa; depends on associated seal, tube material, tube diameter and tube wall thickness in the assembly (see EN 4814).
NOTE Assembly in accordance with TR 4815.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2424 ,Aerospace series — Marking of aerospace products
EN 2516 , Aerospace series — Passivation of corrosion resisting steels and decontamination of nickel base alloys
EN 3468, Aerospace series – Steel FE-PA 13 – Softened – 500 < R, < 700 MPa – Forgings – Dc < 100 mm’)
EN 3487 , Aerospace series — Steel FE-PA3601 (X6CrN1T1I8-lO) — Air melted — Softened — Bar for machining — a or D < 250 mm — 500 MPa < Rm < 700 MPQ
EN 4315 , series — Heat resisting alloy FE-PAZ6OI (X6NiC,TIMoV26-15) — Solution treated and precipitation treated, bar and section a or D < 100 mm, Rm  900 MPO
EN 4814, Aerospace series- Flange couplings up to 21 000 kPa – Technical specification – lnch series
EN 9100 , Quality Management Systems — Requirements for Aviation, Space and Defense Organizations
TR 4815, Aerospace series – Flange couplings up to 21 000 kPa – Design standard – Inch series2)
3 Required characteristics
3.1 Configuration — Dimensions — Tolerances — Masses
See Figure 1 and Table 2. Dimensions and tolerances are in millimetres, except otherwise specified.
3.2 Material and surface treatment
5 ldentification marking
EN 2424 , category A, as indicated on Figure 1.
6 Technical specification
See EN 4814.
7 Quality Assurance
Approval of the manufactures.
See EN 9100.BS EN 4801 pdf download.