BS EN 1254-2:2021 – TC
$186.33
Tracked Changes. Copper and copper alloys. Plumbing fittings – Compression fittings for use with copper tubes
Published By | Publication Date | Number of Pages |
BSI | 2021 | 82 |
This document specifies product characteristics, assessment methods, compliance criteria of the test results and a designation system for compression fittings for connecting with copper tubes. Compression fittings exist with sealing elements – metallic and/or non-metallic – called non manipulative (commonly referenced as type A) and without sealing elements, called manipulative (commonly referenced as type B). For the purposes of joining copper tubes, the fitting ends have a nominal diameter from 6 mm to 108 mm. The compression fittings are designed for a service lifetime up to fifty years.
The fittings are used up to the operating temperatures and corresponding maximum operating pressures as indicated in Annex A.
This document applies to copper alloy fittings. A non-exhaustive list of these copper alloys is given in CEN/TS 13388.
Compression fitting ends, Type A, are used with copper tubes to EN 1057 in all material hardness conditions.
Compression fittings, Type A, will possibly require an internal support when used with R220 (annealed) copper tube and the manufacturer’s advice should be sought.
Compression fitting ends, Type B, are used with R220 (annealed) or R250 (half-hard) copper tube to EN 1057.
Compression fittings, Type B, may be used with R290 (hard) copper tube and the manufacturer’s advice should be sought.
Adaptor fittings for use with copper tubes may combine compression ends with fitting ends defined in the other parts of EN 1254.
Compression fittings for use with copper tubes may also have flanged end connections according to EN 1092?3.
Compression fittings for use with copper tubes may also have a plated or other decorative surface coating.
Fittings can be produced by machining, metal forming, casting, or fabrication.
Products covered by this standard are intended to be used in:
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liquid applications:
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hot, cold or combined hot and cold water, including systems according to EN 806 ;
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closed heating systems according to EN 12828 ;
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cooling systems.
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drainage systems:
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fire protection systems including sprinkler systems according to EN 12845 ;
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supply systems for points of consumption with liquid fuels according to EN 12514 .
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gas applications:
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natural gas and liquefied petroleum gas systems with a maximum operating pressure less than or equal to 5 bar according to EN 1775 ;
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compressed air systems.
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PDF Catalog
PDF Pages | PDF Title |
---|---|
1 | compares BS EN 1254-2:2021 |
2 | TRACKED CHANGES Text example 1 — indicates added text (in green) |
3 | Contractual and legal considerations |
4 | Compliance with a British Standard does not of itself cannot confer immunity from legal obligations. Amendments /corrigenda issued since publication |
8 | Foreword European foreword |
10 | Introduction |
13 | 3.1 3.2 3.2.1 3.2.2 3.3 3.4 3.5 |
14 | 4.1 General 4.1.1 For liquid applications 4.1.2 For fuel gas applications 4.1.3 For compressed air applications 4.2 Materials Table 1 — Examples of commonly used materials |
15 | 4.2.1 General requirements 4.2.1.1 Integrity of fabricated fitting bodies or having an ‘as cast’ microstructure 4.2.1.2 Resistance to pull-out 4.2.1.3 Leak tightness under static flexural force 4.2.2 Requirements for liquid applications 4.2.2.1 Leak tightness under internal hydrostatic pressure 4.2.2.2 Leak tightness under vacuum 4.2.2.3 Leak tightness under temperature cycling 4.2.3 Requirements for gas applications 4.2.3.1 Leak tightness under internal pneumatic pressure 4.2.3.2 Leak tightness under temperature cycling for fuel gas applications 4.2.3.3 Compression fitting with elastomeric seals for fuel gas application inside buildings 4.2.3.4 Compression fitting with elastomeric seals for fuel gas application outside buildings |
16 | 4.3 Dimensions and tolerances |
17 | Table 3 — Minimum wall thicknesses |
20 | Table 4 — Minimum length of thread engagement when assembled hand tight, minimum socket depths and minimum bore diameters |
21 | 4.4 Design and manufacture Table 5 — Maximum temperatures and pressures |
23 | 4.5 Production test requirements 4.5.1 Durability of internal pressure: Resistance to stress corrosion 4.5.2 Durability of tightness 4.5.2.1 Resistance to dezincification |
24 | 4.5.2.2 Resistance to pressure cycling 4.6 Type test requirements |
26 | Figure 1 — Tube abutment |
27 | 5.1 Sampling procedure Table 6 — Sampling groups 5.1.1 Preparation of fittings for testing 5.1.2 Test temperature 5.1.3 Tolerances 5.2 Preparation of fittings for testing |
28 | 5.2.1 Internal hydrostatic pressure test Table 1 — Internal hydrostatic pressure test parameters 5.2.2 Internal pneumatic pressure test for fuel gas applications Table 2 — Internal pneumatic pressure test parameters 5.2.3 Internal pressure tests for compressed air applications Table 3 — Internal hydrostatic pressure test parameters for compressed air |
29 | Table 4 — Internal pneumatic pressure test parameters for compressed air 5.3 Test sequence c) leaktightness under internal hydrostatic pressure whilst subjected to bending (type A only). 5.3.1 General tests 5.3.1.1 Integrity of fabricated fitting bodies or having an ‘as cast’ microstructure Table 5 — Pneumatic pressure test parameters 5.3.1.2 Resistance to pull-out 5.3.1.3 Leak tightness under static flexural force Table 6 — Internal hydrostatic pressure whilst subjected to static flexural force test parameters |
30 | 5.3.2 Tests for liquid applications 5.3.2.1 Leak tightness under vacuum Table 7 — Leak tightness under vacuum test parameters 5.3.2.2 Leak tightness under temperature cycling Table 8 — Resistance to temperature cycling test parameters 5.3.3 Tests for gas applications: Leak tightness under temperature cycling for gas applications Table 9 — Resistance to operating temperature variation: test parameters 5.4 Leaktightness under internal hydrostatic pressure |
31 | 5.4.1 Durability of internal pressure: Resistance to stress corrosion 5.4.2 Durability of tightness 5.4.2.1 Resistance to dezincification 5.4.2.2 Resistance to pressure cycling Table 10 — Resistance to pressure cycling test parameters 5.5 Resistance to pull-out 5.5.1 Type testing 5.5.2 FPC testing |
32 | 5.6 Leaktightness under internal hydrostatic pressure whilst subjected to bending |
33 | Table 7 — Tensile loads for resistance to pull-out tests |
34 | 5.7 Pressure test When required, the bodies of fittings with as-cast microstructure, after machining shall be pressure tested by the manufacturer. At the option of the manufacturer, they shall be submitted to a hydrostatic pressure test or to a pneumatic pressure test … 5.7.1 Type testing 5.7.2 FPC testing 5.8 Dezincification resistance test 5.9 Stress corrosion resistance test |
35 | Table 8 — Internal hydrostatic pressures for leaktightness test whilst subjected to bending |
36 | 6 Designation |
37 | 6.2.1 General 6.2.2 Test samples, testing and compliance criteria |
38 | Table 11 — Number of samples to be tested and compliance criteria for liquid applications |
40 | Table 12 — Number of samples to be tested and compliance criteria for fuel gas applications |
42 | Table 13 — Number of samples to be tested and compliance criteria for compressed air applications |
43 | 6.2.3 Test reports 6.3.1 General 6.3.2 Equipment 6.3.2.1 Testing 6.3.2.2 Production |
44 | 6.3.3 Raw materials and components 6.3.4 Product tes ting and evaluation Table 14 — Number of samples to be tested and compliance criteria for liquid applications |
45 | Table 15 — Number of samples to be tested and compliance criteria for gas applications |
46 | 8.1 Declaration of conformity |
47 | 8.2 User instructions |
48 | A.1 Introduction A.2 Procedure A.3 Expression of results |
49 | Table A.1 — Operating temperatures and corresponding maximum operating pressures for fittings with compression ends when used with liquids Table A.2 — Operating temperatures and maximum operating pressures for fittings with compression ends when used with fuel gas Table A.3 — Operating temperatures and maxim um operating pressures for fittings with compression ends when used with compressed air |
50 | Annex B (informative) Bibliography |
52 | undefined |
58 | 1 Scope |
59 | 2 Normative references |
60 | 3 Terms and definitions 4 Product characteristics 4.1 Internal pressure 4.1.1 For liquid applications 4.1.2 For fuel gas applications 4.1.3 For compressed air applications 4.2 Tightness 4.2.1 General requirements 4.2.1.1 Integrity of fabricated fitting bodies or having an ‘as cast’ microstructure 4.2.1.2 Resistance to pull-out 4.2.1.3 Leak tightness under static flexural force 4.2.2 Requirements for liquid applications 4.2.2.1 Leak tightness under internal hydrostatic pressure |
61 | 4.2.2.2 Leak tightness under vacuum 4.2.2.3 Leak tightness under temperature cycling 4.2.3 Requirements for gas applications 4.2.3.1 Leak tightness under internal pneumatic pressure 4.2.3.2 Leak tightness under temperature cycling for fuel gas applications 4.2.3.3 Compression fitting with elastomeric seals for fuel gas application inside buildings 4.2.3.4 Compression fitting with elastomeric seals for fuel gas application outside buildings 4.3 Resistance to high temperature for fittings with elastomeric seals (for heating networks) 4.4 Release of dangerous substances |
62 | 4.5 Durability 4.5.1 Durability of internal pressure: Resistance to stress corrosion 4.5.2 Durability of tightness 4.5.2.1 Resistance to dezincification 4.5.2.2 Resistance to pressure cycling 4.6 Wall thickness at threaded portions of adaptor fittings 4.7 Dimensions of tail pipe ends for swivel fittings |
63 | 4.8 Dimensions of gas union connectors 4.9 Threaded end dimensions 4.10 Other adapter ends (not defined in EN 125420:2021) 4.11 Bore dimensions 4.12 Identity of elastomeric sealing material for liquid applications 4.13 Identity of elastomeric sealing material for gas applications |
64 | 4.14 Tube abutment 4.15 Alignment of the fitting ends 4.16 Shapes for tightening systems 4.17 Surface condition 4.18 Plated or coated surfaces |
65 | 5 Testing, assessment and sampling methods 5.1 General 5.1.1 Preparation of fittings for testing 5.1.2 Test temperature 5.1.3 Tolerances 5.2 Internal pressure 5.2.1 Internal hydrostatic pressure test 5.2.2 Internal pneumatic pressure test for fuel gas applications |
66 | 5.2.3 Internal pressure tests for compressed air applications 5.3 Tightness 5.3.1 General tests 5.3.1.1 Integrity of fabricated fitting bodies or having an ‘as cast’ microstructure 5.3.1.2 Resistance to pull-out |
67 | 5.3.1.3 Leak tightness under static flexural force 5.3.2 Tests for liquid applications 5.3.2.1 Leak tightness under vacuum 5.3.2.2 Leak tightness under temperature cycling 5.3.3 Tests for gas applications: Leak tightness under temperature cycling for gas applications 5.4 Durability 5.4.1 Durability of internal pressure: Resistance to stress corrosion |
68 | 5.4.2 Durability of tightness 5.4.2.1 Resistance to dezincification 5.4.2.2 Resistance to pressure cycling 5.5 Wall thickness at threaded portions of adaptor fittings 5.5.1 Type testing 5.5.2 FPC testing 5.6 Dimensions of tail pipe ends for swivel fittings 5.7 Dimensions of gas union connectors 5.7.1 Type testing 5.7.2 FPC testing |
69 | 5.8 Threaded end dimensions 5.9 Bore dimensions 5.10 Identity of elastomeric sealing material for liquid applications 5.11 Identity of elastomeric sealing material for gas applications 5.12 Alignment of the fitting ends 6 Evaluation of conformity 6.1 General 6.2 Type testing 6.2.1 General |
70 | 6.2.2 Test samples, testing and compliance criteria |
75 | 6.2.3 Test reports 6.3 Factory production control (FPC) 6.3.1 General 6.3.2 Equipment 6.3.2.1 Testing 6.3.2.2 Production |
76 | 6.3.3 Raw materials and components 6.3.4 Product testing and evaluation |
78 | 7 Designation 8 Marking, labelling and packaging 8.1 General 8.2 Additional marking |
79 | 8.3 Dezincification resistant copper zinc alloys |
80 | Annex A (normative)Operating temperatures and corresponding maximum operating pressures |