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BS EN 1254-20:2021

BS EN 1254-20:2021

$198.66

Copper and copper alloys. Plumbing fittings – Definitions, thread dimensions, test methods, reference data and supporting information

Published By Publication Date Number of Pages
BSI 2021 68
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This document contains definitions, thread dimension, reference data (minimum bore), supporting information (assembling instructions) and describes the test methods referenced by other parts of the EN 1254 series.

Thread dimensions comprise: wall thickness at threaded portions of fittings, dimensions of tail pipe ends for swivel fittings, dimensions of gas union connectors, thread dimensions and thread profile.

Test methods comprise: leak tightness under internal hydrostatic pressure, leak tightness under internal pneumatic pressure, integrity of fabricated fitting bodies or having an ‘as cast’ microstructure, resistance to pull out of joints to metallic tubes, resistance of joints with metallic tube to vibration, resistance of joints to static flexural force, leak tightness of joints under vacuum, the resistance of joints to temperature cycling, detecting non-pressed fitting ends, resistance to stress corrosion, detection of a carbon film on the surface of copper fittings, determination of mean depth of dezincification, resistance of joints to pressure cycling, disconnection and re-use, determining if the diameter and/or the length of engagement of a capillary end is/are within the specified tolerance, determining the minimum length of engagement of an integral solder or brazing ring socket having a formed groove.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
12 4 Thread dimensions
4.1 Wall thickness at threaded portions of fittings
13 4.2 Dimensions of tail pipe ends for swivel fittings
16 4.3 Dimensions of gas union connectors
18 4.4 Threaded end dimensions
4.4.1 General
19 4.4.2 Internal ISO 7 parallel threads or EN 102261
20 4.4.3 Internal EN ISO 2281 parallel threads
21 4.4.4 External ISO 7 or EN 102261 taper threads
22 4.4.5 External Rk taper threads (modified ISO 7)
23 4.4.6 External EN ISO 2281 parallel threads
24 4.5 Minimum bore and cross-sectional area of fittings
28 5 Test method for leak tightness under internal hydrostatic pressure
5.1 Introduction
29 5.2 Principle
5.3 Apparatus
5.3.1 Pressure measurement device
5.3.2 Pressurizing device
5.3.3 Pressure connection
5.3.4 End connection
5.4 Test piece
30 5.5 Procedure
6 Test method for leak tightness under internal pneumatic pressure
6.1 Introduction
6.2 Principle
31 6.3 Apparatus
6.3.1 Pressure measurement device
6.3.2 Pressurizing device
6.3.3 Pressure connection
6.3.4 End connection
6.4 Test piece
32 6.5 Procedure
33 7 Integrity of fabricated fitting bodies or having an ‘as cast’ microstructure
7.1 Introduction
7.2 Principle
7.3 Apparatus
7.3.1 Pressure measurement device
7.3.2 Pressurizing device
7.3.3 Pressure connection
7.3.4 End sealing device
7.4 Test piece
34 7.5 Procedure
8 Test method for resistance to pull out of joints to metallic tubes
8.1 Introduction
8.2 Principle
8.3 Apparatus
35 8.4 Test assembly
8.5 Procedure
9 Test method for the resistance of joints with metallic tube to vibration
9.1 Introduction
9.2 Principle
36 9.3 Apparatus
9.4 Test assembly
37 9.5 Procedure
10 Test method for the resistance of joints to static flexural force
10.1 Introduction
10.2 Principle
10.3 Apparatus
10.3.1 Pressure measurement device
10.3.2 Pressurizing device
10.3.3 Pressure connection
10.3.4 End connection
10.3.5 Support
10.4 Test piece
38 10.5 Procedure
39 11 Test method for leak tightness of joints under vacuum
11.1 Introduction
11.2 Principle
11.3 Apparatus
11.3.1 Vacuum pressure measurement device
40 11.3.2 Vacuum source (pump)
11.3.3 Isolation valve
11.3.4 End-sealing device
11.4 Test piece
11.5 Procedure
41 12 Test method for the resistance of joints to temperature cycling (liquid applications)
12.1 Introduction
12.2 Principle
12.3 Apparatus
12.4 Test assembly
43 12.5 Procedure
13 Test method for the resistance of joints to temperature cycling (fuel gas applications)
13.1 Introduction
44 13.2 Principle
13.3 Apparatus
13.4 Test assembly
13.5 Procedure
45 14 Method for detecting non-pressed fitting ends
14.1 Introduction
14.2 Principle
14.3 Apparatus
46 14.4 Test piece
14.5 Procedure
14.6 Results
47 15 Determination of resistance to stress corrosion
15.1 Introduction
15.2 Test piece
15.3 Procedure
15.4 Test report
16 Test method for detection of a carbon film on the surface of copper fittings
16.1 Preparation of the test piece
16.2 Procedure
48 16.3 Detection and assessment of films
17 Determination of mean depth of dezincification
17.1 Introduction
17.2 Procedure
17.3 Expression of results
49 18 Test method for the resistance of joints to pressure cycling
18.1 Introduction
18.2 Principle
18.3 Apparatus
18.3.1 Pressurizing device
51 18.3.2 Pressure measurement device
18.4 Test pieces
18.5 Procedure
52 19 Test method for disconnection and re-use
19.1 Introduction
19.2 Principle
19.3 Apparatus
19.4 Test assembly
19.5 Procedure
20 Method for determining if the diameter and/or the length of engagement of a capillary end is/are within the specified tolerance
20.1 Principle
53 20.2 Apparatus
57 20.3 Test piece
20.4 Procedure
20.5 Results
21 Method for determining the minimum length of engagement of an integral solder or brazing ring socket having a formed groove
21.1 Introduction
21.2 Principle
58 21.3 Apparatus
21.4 Test piece
21.5 Procedure
21.6 Results
59 Annex A (informative)Assembling instructions
A.1 Introduction
A.2 Preparation of tube
A.2.1 Metallic tubes
A.2.2 Plastics covered tubes (EN 13349)
60 A.2.3 Plastics pipes
A.3 Jointing procedures
A.3.1 General
61 A.3.2 Capillary fittings
A.3.2.1 Soldering
A.3.2.2 Brazing (Hard Soldering)
62 A.3.3 Compression fittings
A.3.3.1 Type A fittings
63 A.3.3.2 Type A Flanged fittings
A.3.3.3 Type B fittings
64 A.3.4 Push-fit fittings
A.3.5 Press fittings
65 A.3.6 Fittings with threads
A.3.6.1 Introduction
A.3.6.2 General instructions
66 A.3.6.3 Methods of application

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BS EN 1254-20:2021
$198.66