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BS EN 1254-4:2021

BS EN 1254-4:2021

$102.76

Copper and copper alloys. Plumbing fittings – Threaded fittings

Published By Publication Date Number of Pages
BSI 2021 22
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This document specifies product characteristics, assessment methods, compliance criteria of the test results and a designation system for threaded fittings. These threaded ends exist with metallic and with non-metallic sealing elements for the purposes of joining with tubes, pipes, fittings or valves, the threaded ends have a size range from 3,175 mm (1/8”) to 101,6 mm (4”). The threaded 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.

Threaded fittings may also have flanged end connections according to EN 1092?3.

Threaded fittings 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 document are intended to be used in:

  1. liquid applications:

    1. hot, cold or combined hot and cold water, includingsystems according to EN 806 ;

    2. closed heating systems according to EN 12828 ;

    3. cooling systems;

    4. drainage systems;

    5. fire protection systems including sprinkler systems according to EN 12845 .

  2. gas applications:

    1. natural gas and liquefied petroleum gas systems with a maximum operating pressure less than or equal to 5 bar according to EN 1775 ;

    2. compressed air systems.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 European foreword
7 Introduction
8 1 Scope
2 Normative references
9 3 Terms and definitions
4 Product characteristics
4.1 Internal pressure
4.2 Tightness
4.2.1 Leak tightness under internal hydrostatic pressure
4.2.2 Integrity of fabricated fitting bodies or having an ‘as cast’ microstructure
4.3 Resistance to high temperature (for heating networks)
4.4 Release of dangerous substances
10 4.5 Durability
4.5.1 Durability of internal pressure: Resistance to stress corrosion
4.5.2 Durability of tightness: Resistance to dezincification
4.6 Wall thickness at threaded portions of fittings
4.7 Dimensions of tail pipe ends for swivel fittings
11 4.8 Dimensions of gas union connectors
4.9 Threaded end dimensions
4.10 Other adapter ends (not defined in EN 1254‑20:2021)
4.11 Bore dimensions
4.12 Alignment of the fitting ends
4.13 Shapes for tightening systems
4.14 Surface condition
4.15 Plated or coated surfaces
12 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
5.3 Tightness: Integrity of fabricated fitting bodies or having an ‘as cast’ microstructure
5.4 Durability
5.4.1 Durability of internal pressure: Resistance to stress corrosion
5.4.2 Durability of tightness: Resistance to dezincification
13 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
5.8 Threaded end dimensions
5.9 Bore dimensions
14 5.10 Alignment of the fitting ends
6 Evaluation of conformity
6.1 General
6.2 Type testing
6.2.1 General
6.2.2 Test samples, testing and compliance criteria
15 6.2.3 Test reports
6.3 Factory production control (FPC)
6.3.1 General
16 6.3.2 Equipment
6.3.3 Raw materials and components
6.3.4 Product testing and evaluation
17 7 Designation
8 Marking, labelling and packaging
8.1 General
8.2 Dezincification resistant copper zinc alloys
19 Annex A (normative) Maximum operating temperatures and maximum operating pressures
21 Bibliography

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BS EN 1254-4:2021
$102.76