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BS EN 549:2019

BS EN 549:2019

$167.15

Rubber materials for seals and diaphragms for gas appliances and gas equipment

Published By Publication Date Number of Pages
BSI 2019 34
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This document specifies requirements and associated test methods for rubber materials used in gas installations, gas equipment and gas appliances in contact with 1st, 2nd and 3rd family combustible gases as classified in EN 437:2018, additionally LPG, bio methane and bio LPG, in the same quality, are covered. It also establishes a classification based on temperature range and hardness. This document is applicable to materials from which homogeneous seals and homogeneous or reinforced diaphragms are manufactured. Since the dimensions and shape of the components differ from those of standard test pieces taken from sheet material as used for type testing of the rubber materials according to this document, tolerances have been made in the requirements specified by Annex A for the components with respect to those specified for standard test pieces. The range of operating temperatures covered by this document is –40 °C to +150 °C. For applications with potential condensation, this document is not applicable for silicon rubber, e.g. above 200 hPa (200 mbar) nominal pressure or at temperatures below 0 °C with 3rd family gases.

PDF Catalog

PDF Pages PDF Title
2 National foreword
8 1 Scope
2 Normative references
9 3 Terms and definitions
4 Product’s information
10 5 Classification
11 6 Requirements
6.1 General
6.2 Requirements for rubber material used to manufacture seals
12 6.3 Requirements for rubber material used to manufacture diaphragms
14 7 Test methods
7.1 General
7.2 Hardness
7.3 Tensile strength and elongation at break
7.4 Compression set
7.5 Resistance to ageing
7.6 Resistance to gas
15 7.7 Resistance to condensate/liquid phase of combustible gases
7.8 Resistance to lubricants
7.9 Resistance to ozone
17 8 Evaluation of life-time for material used to manufacture seals
18 9 Infrared spectra of the material
19 Annex A (normative)Requirements and test of components
A.1 Scope
A.2 Requirements
A.2.1 General
A.2.2 Physical and chemical properties of seals
A.2.3 Physical and chemical properties of diaphragms
A.3 Tests methods for components
A.3.1 General
A.3.2 Hardness
20 A.3.3 Resistance to ageing
A.3.4 Resistance to gas
A.3.5 Resistance to condensate/liquid phase of combustible gas
A.3.6 Resistance to lubricants
21 A.3.7 Resistance to ozone
25 Annex B (normative)Infrared spectra of the material
B.1 Scope
B.2 Requirements
B.2.1 General
B.2.2 Solvent extract
B.2.3 Infrared spectra
B.2.4 Density
B.3 Methods of test
B.3.1 General
B.3.2 Solvent extraction
26 B.3.3 Infrared spectra
B.3.4 Density
27 Annex C (normative)Evaluation of lifetime for material used to manufacture seals by using the compression set method
C.1 General
28 C.2 Requirements
C.3 Test Procedure
29 C.4 Evaluation of Test Results
30 C.5 Documentation
31 Annex D (informative)Verification of identity of material
D.1 Scope
D.2 Verification requirements
D.2.1 General
D.2.2 Solvent extract
D.2.3 Infrared spectra
D.2.4 Density
32 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Regulation 2016/426 aimed to be covered

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BS EN 549:2019
$167.15