Aerospace series - Pipe coupling 37°, spherical up to 21 000 kPa - Inch series - Technical specification

This European Standard specifies the required characteristics, inspection and test methods, quality assurance and procurement requirements for inch series, pipe coupling, 37°, spherical, for temperature ranges from type II to type V according to ISO 6771 and nominal pressure up to 21 000 kPa.
In addition to the requirements of this technical specification, the coupling assemblies shall be qualified in accordance with equipment or component specification requirements.

Luft- und Raumfahrt - Rohrverschraubung 37° mit Kugelbuchse, bis 21 000 kPa - Inch-Reihe - Technische Lieferbedingungen

Série aérospatiale - Système de raccordement sphérique 37°, jusqu'à 21 000 kPa - Série inch - Spécification technique

Aeronavtika - Cevni priključek 37°, kroglast, do 21 000 kPa - Colska izvedba - Tehnična specifikacija

Ta standard določa zahtevane lastnosti, preglede in preskusne metode, zagotavljanje kakovosti in zahteve za nabavo za colsko izvedbo kroglastih cevnih priključkov 37° za temperaturne obsege od tipa II do tipa V v skladu s standardom ISO 6771 in nominalne tlake do 21 000 kPa.
Poleg zahtev te tehnične specifikacije morajo spojni sestavi izpolnjevati tudi zahteve glede specifikacij opreme ali komponent.

General Information

Status
Published
Publication Date
21-Jul-2015
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
22-Jul-2015
Completion Date
22-Jul-2015

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SLOVENSKI STANDARD
SIST EN 4560:2015
01-oktober-2015
1DGRPHãþD
SIST EN 4560:2004
$HURQDYWLND&HYQLSULNOMXþHNƒNURJODVWGRN3D&ROVNDL]YHGED
7HKQLþQDVSHFLILNDFLMD
Aerospace series - Pipe coupling 37°, spherical up to 21 000 kPa - Inch series -
Technical specifiation

Luft- und Raumfahrt - Rohrverschraubung 37° mit Kugelbuchse, bis 21 000 kPa - Inch-

Reihe - Technische Lieferbedingungen

Série aérospatiale - Système de raccordement sphérique 37°, jusqu'à 21 000 kPa - Série

inch - Spécification technique
Ta slovenski standard je istoveten z: EN 4560:2015
ICS:
49.080 /HWDOVNLLQYHVROMVNL Aerospace fluid systems and
KLGUDYOLþQLVLVWHPLLQGHOL components
SIST EN 4560:2015 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 4560:2015
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SIST EN 4560:2015
EUROPEAN STANDARD
EN 4560
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2015
ICS 49.080 Supersedes EN 4560:2003
English Version
Aerospace series - Pipe coupling 37°, spherical up to 21 000
kPa - Inch series - Technical specification

Série aérospatiale - Système de raccordement sphérique Luft- und Raumfahrt - Rohrverschraubung 37° mit

37°, jusqu'à 21 000 kPa - Série inch - Spécification Kugelbuchse, bis 21 000 kPa - Inch-Reihe - Technische

technique Lieferbedingungen
This European Standard was approved by CEN on 10 January 2015.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same

status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United

Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 4560:2015 E

worldwide for CEN national Members.
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SIST EN 4560:2015
EN 4560:2015 (E)
Contents
Page

European foreword .............................................................................................................................................3

1 Scope ......................................................................................................................................................4

2 Normative references ............................................................................................................................4

3 Terms and definitions ...........................................................................................................................5

3.1 Pressure ..................................................................................................................................................5

3.2 Coupling and assembling .....................................................................................................................5

3.3 Surface defects ......................................................................................................................................6

3.4 Quality assurance ..................................................................................................................................6

4 Requirements, inspection and test methods ......................................................................................7

4.1 Test conditions and preparation of specimens for qualification ......................................................7

4.1.1 Test fluids ...............................................................................................................................................7

4.1.2 Specimen preparation ...........................................................................................................................7

4.1.3 Pipe assembly ........................................................................................................................................8

5 Quality assurance ............................................................................................................................... 13

5.1 Product qualification .......................................................................................................................... 13

5.2 Quality control records ...................................................................................................................... 13

5.3 Acceptance conditions ...................................................................................................................... 13

5.3.1 Classification of defects .................................................................................................................... 13

5.3.2 Level of inspection ............................................................................................................................. 14

5.4 Rejection .............................................................................................................................................. 14

5.5 Purchaser's (user's) quality control .................................................................................................. 14

6 Preparation for delivery ..................................................................................................................... 16

6.1 Cleaning ............................................................................................................................................... 16

6.2 Preservation and packaging .............................................................................................................. 16

Annex A (informative) Standard evolution form .......................................................................................... 17

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SIST EN 4560:2015
EN 4560:2015 (E)
European foreword

This document (EN 4560:2015) has been prepared by the Aerospace and Defence Industries Association of

Europe - Standardization (ASD-STAN).

After enquiries and votes carried out in accordance with the rules of this Association, this European Standard

has received the approval of the National Associations and the Official Services of the member countries of

ASD, prior to its presentation to CEN.

This European Standard shall be given the status of a national standard, either by publication of an identical

text or by endorsement, at the latest by January 2016, and conflicting national standards shall be withdrawn at

the latest by January 2016.
This document supersedes EN 4560:2003.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech

Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece,

Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,

Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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SIST EN 4560:2015
EN 4560:2015 (E)
1 Scope

This European Standard specifies the required characteristics, inspection and test methods, quality assurance

and procurement requirements for inch series, pipe coupling, 37°, spherical, for temperature ranges from type

II to type V according to ISO 6771 and nominal pressure up to 21 000 kPa.

In addition to the requirements of this technical specification, the coupling assemblies shall be qualified in

accordance with equipment or component specification requirements.
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.

prEN 2951, Metallic materials — Test method — Micrographic determination of content of non-metallic

inclusions

EN 9133, Aerospace series — Quality management systems — Qualification procedure for aerospace

standard parts
EN 10204, Metallic products — Types of inspection documents

EN ISO 1302, Geometrical Product Specification (GPS) — Indication of surface texture in technical product

documentation (ISO 1302)

ISO 2685, Aircraft — Environmental test procedure for airborne equipment — Resistance to fire in designated

fire zones

ISO 2859-1, Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by

acceptance quality limit (AQL) for lot-by-Iot inspection

ISO 6771, Aerospace — Fluid systems and components — Pressure and temperature classifications

ISO 6772, Aerospace — Fluid systems — Impulse testing of hydraulic hose, tubing and fitting assemblies

ISO 7137, Aircraft — Environmental conditions and test procedures for airborne equipment

ISO 8625-1, Aerospace — Fluid systems — Vocabulary — Part 1: General terms and definitions related to

pressure

TR 2674, Aerospace series — Design and construction of pipelines for fluids in liquid or gaseous condition —

Rigid lines, installation

MIL-L-23699, Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number O-156

Available on ASD-STAN website (http://www.asd-stan.org/).

Published as ASD-STAN Technical Report at the date of publication of this European Standard

(http://www.asd-stan.org/).

Published by : Department of Defense (DoD), the Pentagon, Washington, D.C. 20301, US

(http://www.defenselink.mil/).
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SIST EN 4560:2015
EN 4560:2015 (E)
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 Pressure

nominal pressure, proof pressure, impulse pressure, burst pressure according to Table 1 below.

Table 1
Wall thickness 0,71 mm Wall thickness 0,89 mm
Dimensional Nominal
Nominal Proof Impulse Burst Nominal Proof Impulse Burst
code diameter
pressure pressure pressure pressure pressure pressure pressure pressure
mm bars bars bars bars bars bars bars bars
03 4,76
420 840
04 6,35 210 420 840
210 210
05 7,92 360 720 210
06 9,52 160 270 540 360 720
08 12,70 210 420 160 270 540
10 15,87 105 180 105 360 210 420
12 19,05 140 280 105 180 105 360
16 25,40 40 105 40 210 140 280
3.2 Coupling and assembling
3.2.1
coupling assembly

assembled nut, ferrule and pipe mating with e.g. nipple, union, elbow, see Figure 1

Key
1 Straight union
2 Nut
3 Ferrule
Figure 1 — Example of coupling assembly
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SIST EN 4560:2015
EN 4560:2015 (E)
3.2.2
dimensional code
corresponds to the nominal diameter given in 16 of inches within two digits
3.2.3
snug
moment when positive resistance to rotation is observed during assembling
3.3 Surface defects
3.3.1
surface irregularity
nonconformity with general surface appearance, possible defect
3.3.2
crack

clean (crystalline) fracture passing through or across the grain boundaries that possibly follows inclusions of

foreign elements. Cracks are normally caused by overstressing the metal during forging or other forming

operations, or during heat treatment. Where parts are subject to significant reheating, cracks are usually

discoloured by scale
3.3.3
fold

doubling over of metal, which can occur during the forging operation. Folds can occur at or near the

intersection of diameter changes and are especially prevalent with non-circular necks, shoulders and heads.

3.3.4
lap
fold-like machining defect
3.3.5
seam

(1) usually a surface opening or crack resulting from a defect obtained during casting or forging

(2) extraneous material, stringer in the material, which is not homogeneous with base metal

3.3.6
pit
void or hole in the surface as caused, for example, by corrosion
3.4 Quality assurance
3.4.1
production batch

definite quantity of some commodity or service produced at one time under conditions that are presumed

uniform
3.4.2
delivery batch

batch consisting of couplings with the same identity block which may come from different production batches

3.4.3
acceptance quality limit
AQL

when a continuing series of lots is considered, a quality level which for the purposes of sampling inspection is

the limit of a satisfactory process average
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SIST EN 4560:2015
EN 4560:2015 (E)
3.4.4
qualification

testing required to demonstrate successful performance of the coupling assembly in simulated service

(overload, destructive and fatigue tests)
3.4.5
major defect

defect other than critical, that is likely to result in a failure or to reduce materially the usability of the considered

product for its intended purpose
3.4.6
minor defect

defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or

that is a departure from established specification having little bearing on the effective use or operation of this

product
4 Requirements, inspection and test methods
See Table 2 and Table 3.

Qualification tests given from 4.12 to 4.15 shall only be made when required. Complementary qualification

tests may be determined in direct relation with the application (e.g. vibration test, thermal shock test).

The coupling shown on the figures of this European Standard are for information only. The test specimens

shall be assembled with the part to test (e.g. elbow fitting instead of straight fitting).

Non removable coupling (e.g. welded elbow, welded reducer) shall be tested on sample pipes in combination

with removable (threaded) couplings.
4.1 Test conditions and preparation of specimens for qualification
4.1.1 Test fluids

Unless otherwise specified, tests shall be carried out using e.g. oil compatible with the test temperature range.

Water may be used, whenever practical, for proof, burst, stress corrosion and re-use capability testing.

4.1.2 Specimen preparation

Shaped parts shall be machined with the grain flow of the bar or plate in the direction of the fluid. Installations

on the coupling shall be in accordance with TR 2674. The coupling shall not be lubricated prior the first

assembling. For the next assembling they shall be lubricated with engine oil (e.g. according to MIL-L-23699)

at the interface between the nut and the ferrule.

Prior to testing, and unless otherwise specified, all couplings with dimensional code up to 12 shall be

assembled using either of the following methods. For couplings with dimensional code greater than 12 the

assembling shall be made by using the torque tightening method:
 torque tightening method:

A torque value comprised between the minimum and the maximum given in Table 4 shall be applied to

the nut per TR 2674.
 angle tightening method:
The following sequence shall be applied:
1) tighten the nut with a wrench to snug;
2) turn the nut an additional 60° [see Figure 2 a)];
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SIST EN 4560:2015
EN 4560:2015 (E)
3) loosen the nut; (for new parts assembling only);
4) retighten the nut with a wrench to snug;

5) turn the nut an additional 30° [see Figure 2 b)]. Figure 2 c) gives also a checking method by using

and returning an open end wrench with a 15° offset.

The torque tightening method used for the test and value applied shall be recorded.

4.1.3 Pipe assembly

The method of joining the pipe to the coupling (brazing, welding, mechanical attachment, etc.) shall not be

detrimental to the properties, strength or geometry of the pipe assembly. The joint shall be in accordance with

the design instructions and shall be inspected by direct measurement, X-ray or other non-destructive

methods.
Figure 2 — Configuration for angl
...

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