SVENSK STANDARD SS-EN 3792:2022

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SS-EN 3792:2022

SVENSK STANDARD

Språk: engelska / English Utgåva: 1

Flyg- och rymdteknik – Anaeroba polymeriserade föreningar – Teknisk specifikation

Aerospace series – Anaerobic polymerisable compounds – Technical specification

This preview is downloaded from www.sis.se. Buy the entire This preview is downloaded from www.sis.se. Buy the entire This preview is downloaded from www.sis.se. Buy the entire This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80035322

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Fastställd: 2022-05-13 ICS: 49.025.01;49.040

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Europastandarden EN 3792:2022 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN 3792:2022.

The European Standard EN 3792:2022 has the status of a Swedish Standard. This document contains the official version of EN 3792:2022.

This preview is downloaded from www.sis.se. Buy the entire standard via https://www.sis.se/std-80035322

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LÄSANVISNINGAR FÖR STANDARDER

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READING INSTRUCTIONS FOR STANDARDS

These instructions cover the main principles for the use of provisions and external constraints in standardization deliverables.

Requirement

A requirement is an expression, in the content of a document, that conveys objectively verifiable criteria to be fulfilled, and from which no deviation is permitted if conformance with the document is to be claimed. Requirements are expressed by the auxiliary shall (or shall not for prohibition).

Recommendation

A recommendation is an expression, in the content of a document, that conveys a suggested possible choice or course of action deemed to be particularly suitable, without necessarily mentioning or excluding others. Recommendations are expressed by the auxiliary should (or should not for dissuasion).

Instruction

An instruction is expressed in the imperative mood and is used in order to convey an action to be performed. It can be subordinated to another provision, such as a requirement or a recommendation. It can also be used independently and is then to be regarded as a requirement.

Statement

A statement is an expression, in the content of a document, that conveys information. A statement can express permission, possibility or capability. Permission is expressed by the auxiliary may. There is no recommended opposite expression for the auxiliary may in standardization, prohibition is expressed by the use of shall not in accordance with the rules for requirements. Possibility and capability are expressed by the auxiliary can (its opposite being cannot).

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EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM

EN 3792

May 2022

ICS

English Version

Aerospace series - Anaerobic polymerisable compounds - Technical specification

Série aérospatiale - Composés polymérisables

anaérobies - Spécification technique Luft- und Raumfahrt - Anaerobe polymerisierbare Klebstoffe - Technische Lieferbedingungen

This European Standard was approved by CEN on 26 August 2019.

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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

worldwide for CEN national Members. Ref. No. EN 3792:2022 E

SS-EN 3792:2022 (E)

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Contents Page

European foreword ... 3

1 Scope ... 4

2 Normative references ... 4

3 Terms and definitions ... 4

4 Requirements ... 5

5 Quality assurance ... 7

6 Acceptance ... 7

7 Packaging ... 8

8 Marking ... 8

9 Certificate of conformity ... 8

Annex A (normative) Test for colour ... 9

Annex B (normative) Test for fluorescence ... 10

Annex C (normative) Determination of viscosity and thixotropic index ... 11

Annex D (normative) Determination of retention of torque strength after 1 000 h at 100 °C and 150 °C ... 12

Annex E (normative) Determination of retention of torque strength after 168 h in boiling water ... 13

Annex F (normative) Determination of retention of torque strength after 2 h at –55 °C ... 14

Annex G (normative) Determination of retention of static shear strength after 1 000 h at 100 °C and 150 °C ... 15

Annex H (normative) Determination of stability at 100 °C ... 16

Bibliography ... 17 SS-EN 3792:2022 (E)

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European foreword

This document (EN 3792:2022) 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 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 November 2022, and conflicting national standards shall be withdrawn at the latest by November 2022.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

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1 Scope

This document specifies the requirements for a range of one part anaerobic polymerisable compounds which polymerises upon the exclusion of oxygen and activation by a metal surface.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

EN 3793, Aerospace series — Anaerobic polymerisable compounds — Test method — Determination of static shear strength ¹⁾

EN 3794, Aerospace series — Anaerobic polymerisable compounds — Test method — Determination of torque strength on threaded fasteners ¹⁾

EN 3795, Aerospace series — Anaerobic polymerisable compounds — Test method — Determination of freedom from excessive cure rate ¹⁾

EN 3796, Aerospace series — Anaerobic polymerisable compounds — Test method — Determination of ability of anaerobic polymerisable compounds to set on metal surfaces ¹⁾

ISO 3104, Aerospace series — Petroleum products — Transparent and opaque liquids — Determination of kinematic viscosity and calculation of dynamic viscosity

ASTM-D 2196, Standard Test Methods for Rheological Properties of Non-Newtonian Materials by Rotational Viscometer ²⁾

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

• ISO Online browsing platform: available at http://www.iso.org/obp

• IEC Electropedia: available at http://www.electropedia.org/

3.1 activator

substance used in small proportions to increase the reaction rate of chemical systems 3.2 anaerobic polymerisable compound

polymerisable composition which polymerises upon the exclusion of oxygen and activation by a metal surface

1) Published as ASD-STAN Standard at the date of publication of this standard by AeroSpace and Defence industries Association of Europe — Standardization (ASD-STAN), http://www.asd-stan.org/

2) Published by: ASTM National (US) American Society for Testing and Materials http://www.astm.org/

SS-EN 3792:2022 (E)

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5 3.3 batch

quantity of homogeneous compound prepared ready for use from the same processing operation with traceability to its individual constituent components

3.4 curing

increasing the cohesive strength by chemical change 3.5 fluorescence

property of absorbing of one wavelength and emitting light of another wavelength Note 1 to entry: The phenomenon ceases when the source of light is cut off.

3.6 shear strength

force necessary to bring the cured compound to the point of failure by means of forces applied in a shear mode

3.7 thixotropy

decrease of the apparent viscosity under shear stress followed by a gradual recovery when the stress is removed

Note 1 to entry: The effect is time-dependent.

3.8 thixotropic index

ratio of the viscosity measured at one shear rate to that at another shear rate

Note 1 to entry: The shear rates by convention, differ by a factor of 10; this is achieved by changing the rotational speed of the viscometer by a factor of 10.

3.9 torque strength

force necessary to rotate a nut on a bolt where engaged threads are coated with cured compound 3.10

viscosity

property of a material to resist flow in shear

4 Requirements 4.1 Composition

The compounds shall consist essentially of acrylic esters of a polyhydroxy compound. They shall be either of the following:

a) generally clear homogenous liquids free from particulate solids;

b) materials containing solids in suspension.

SS-EN 3792:2022 (E)

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4.2 Colour and visual appearance

4.2.1 When tested in accordance with Annex A, the compounds shall be substantially uniform in colour and free from contamination and foreign matter.

4.2.2 When fluorescence is a requirement of the material standard, the compounds shall be tested in accordance with Annex B and shall be seen to fluoresce.

4.3 Viscosity

4.3.1 When tested in accordance with ISO 3104 and Annex C, the viscosity of the components shall comply with the material standard.

4.3.2 When tested in accordance with Method B of ASTM-D 2196 and Annex C, the thixotropic index shall comply with the material standard.

4.4 Torque strength

4.4.1 When tested in accordance with EN 3794, the torque strength at (23 ± 2) °C shall comply with the material standard.

4.4.2 When tested in accordance with Annex D, the torque strength after 1 000 h at 100 °C and 150 °C shall comply with the material standard.

4.4.3 When tested in accordance with Annex E, the torque strength after 168 h in boiling water shall comply with the material standard.

4.4.4 When tested in accordance with Annex F, the torque strength after 2 h at (- 55 ± 2) °C shall comply with the material standard.

4.5 Static shear strength

4.5.1 When tested in accordance with EN 3793, the static shear strength at (23 ± 2) °C shall comply with the material standard.

4.5.2 When tested in accordance with Annex G, the static shear strength after 1 000 h at 100 °C and at 150 °C shall comply with the material standard.

4.6 Stability

The compounds shall remain stable (not polymerise) at 100 °C for a minimum time as stated in the material standard. The stability at 100 °C shall be determined in accordance with Annex H of this specification.

4.7 Freedom from excessive cure rate

When tested in accordance with EN 3795, the period for which the compound is free from excessive cure shall comply with the material standard.

4.8 Ability to set on a zinc surface

The compounds shall have the ability to set on a zinc surface within a time as specified in the material standard. The method of determination shall be in accordance with EN 3796.

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4.9 Shelf life

4.9.1 When stored at a temperature of less than 25 °C in the original unopened containers, the shelf life of the compound, measured from the date of dispatch by the manufacturer, shall be at least 12 months.

4.9.2 At any time during the shelf life, the compounds shall comply with the property requirements of the material standard.

5 Quality assurance 5.1 Manufacturer approval

See EN 9100.

5.2 Product qualification

See EN 9133.

5.2.1 In addition to the requirements of EN 9133, the manufacturer or supplier wishing to have his product(s) qualified shall submit them to a mandated body as designated by ASD-CERT:

a) samples of the anaerobic polymerisable compound(s) for which qualification is sought;

b) test results for the properties listed in the material standards for the same batch of material from which the submitted samples have been obtained;

c) full instructions for use of the compounds.

5.2.2 All the tests listed in the specification for which qualification is sought shall be carried out on the samples provided to the mandated body by the manufacturer.

5.3 Inspection and test requirements

An anaerobic polymerisable compound shall be tested as applicable in accordance with the requirements given in column Q, Table 1, and shall comply with the properties of the material standard.

6 Acceptance

6.1 Manufacturing responsibility

The manufacturer shall be responsible for the quality and relevant procedures for all inspection and test requirements as specified in 6.3.

6.2 Product acceptance

Each batch of material released by the manufacturer shall be deemed to comply with this specification and the material standard.

6.3 Inspection and test requirements

6.3.1 Every batch of material shall be inspected and tested to the requirements of column A Table 1.

SS-EN 3792:2022 (E)