ASD-STAN PREN 4816-2015 Aerospace series Flange couplings Gasket seal with nickel alloy C seal Technical specification Inch series (Edition P 1).pdf
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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4816 Edition P 1 December 2015 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Descriptors: ENGLISH VERSION
2、Aerospace series Flange couplings Gasket seal with nickel alloy C seal Technical specification Inch series Luft- und Raumfahrt Rohrverschraubung mit Flanschen Flachdichtung aus Nickellegierung mit Armierung Technische Lieferbedingung Inch-Reihe Srie arospatiale Raccordement bride Joint plaque avec j
3、oint C en alliage de nickel Spcification technique Srie en inches This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industr
4、y. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification
5、of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to i
6、mplement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1st December 2015 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Do
7、main Copyright 2015 by ASD-STAN prEN 4816:2015 (E) 2 Contents Page Foreword .2 1 Scope .3 2 Normative references .3 3 Terms and definitions 4 4 Requirements, inspection and test methods .6 5 Quality assurance .9 6 Preparation for delivery 10 7 Storage 11 Annex A (normative) Test assembly for ageing
8、and pressure testing . 12 Annex B (normative) Inspection during assembly . 13 Annex C (normative) Ageing and pressurizing tests . 14 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Mechanical Domain. After inquiries and votes carried out in accordance with the ru
9、les of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 4816:2015 (E) 3 1 Scope This standard specifies the required characteristics, inspection and test methods, quality assurance and procurement requirements for inch series, gasket sea
10、l with C seal in nickel alloy, for temperature ranges from type II to type V according to ISO 6771 and nominal pressure up to 10 500 kPa (class B according to ISO 6771). In addition to the requirements of this technical specification, the coupling assemblies shall be qualified in accordance with equ
11、ipment 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
12、 of the referenced document (including any amendments) applies. EN 2951, Aerospace series Metallic materials Test method Micrographic determination of content of non-metallic inclusions 1) EN 9133, Aerospace series Quality management systems Qualification procedure for aerospace standard parts EN 10
13、204, Metallic products Types of inspection documents ISO 468:1982, Surface roughness Parameters, their values and general rules for specifying requirements ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot i
14、nspection ISO 6771, Aerospace Fluid systems and components Pressure and temperature classifications ISO 8625-1, Aerospace Fluid systems Vocabulary Part 1: General terms and definitions related to pressure TR 2674, Aerospace series Design and construction of pipeline for fluids in liquid or gaseous c
15、ondition Rigid lines, installation 2) TR 4815, Aerospace series Flange couplings, up to 21 000 kPa Design standard Inch series 2) MIL-PRF-23699, Lubricating oil, aircraft turbine engine, synthetic base, NATO code number O-156 3) 1) Published as ASD-STAN Prestandard at the date of publication of this
16、 standard. (http:/www.asd-stan.org/) 2) Published as ASD-STAN Technical Report at the date of publication of this standard. (http:/www.asd-stan.org/) 3) Published by: DoD National (US) Mil. Department of Defense. (http:/www.defenselink.mil/) prEN 4816:2015 (E) 4 3 Terms and definitions For the purpo
17、ses of this document, the following terms and definitions apply. 3.1 Pressure Nominal pressure, proof pressure, impulse pressure, burst pressure according to ISO 8625-1. Maximum operating pressure depends on the seal use in the assembly. 3.2 Coupling and assembling 3.2.1 coupling assembly assembled
18、ferrule, loose flange, bolts and pipe mating with e.g. equipment (see Figure 1) Key 1 Bolts 2 Swivel flange 3 Tube 4 Coupling 5 Seal 6 Port connection on case or equipment Figure 1 Example of coupling assembly prEN 4816:2015 (E) 5 3.2.2 dimensional code is composed with the nominal diameter given in
19、 16th of inches within 2 digit and additional digit when necessary to describe the size of a fluid system component and other configuration options 3.3 Surface defects 3.3.1 surface irregularity nonconformity with general surface appearance, possible defect 3.3.2 crack clean (crystalline) fracture p
20、assing through or across the grain boundaries that possibly follows inclusions of foreign elements Note 1 to entry: Cracks are normally caused by overstressing the metal during forging or other forming operations, or during heat treatment. Note 2 to entry: Where parts are subject to significant rehe
21、ating, 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 def
22、ect 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 assura
23、nce 3.4.1 production batch a 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 Acceptable Quality Level
24、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 prEN 4816:2015 (E) 6 3.4.4 qualification testing required to demonstrate successful performance of the coupling assembly in simulated servi
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