BS 8537:2010 Copper and copper alloys. Plumbing fittings

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BS 8537:2010 Copper and copper alloys. Plumbing fittings. Specification for press ends of plumbing fittings for use with metallic tubes

Size: 3.8 MB | Format: PDF | Year: 31 December 2010 | pages: 42 | ISBN: 978 0 580 69868 2

Press fittings are becoming more widely used in plumbing, heating and chilled water installations. BS 8537 will help manufacturers, suppliers or specifiers of copper tube fittings adapt to the increasing demand and ensure their products are suitable for use.

Specifying to BS 8537 will help manufacturers of press fittings find wider acceptance of press fittings in the UK market. Consultants often prefer to quote compliance to the standard so they remain independent from endorsing a manufacturer’s product. Pipe fittings conforming to BS 8537 are more likely to be referenced in contracts.

BS 8537 is the British Standard that specifies requirements for materials and design of press fit copper fittings intended to carry water or gas. Press fittings (also known as crimp fittings) are crimped, by the closure of a special jaw within a press machine, on to a tube. The crimping process mechanically locks a fitting on to a tube and presses a sealing ring within the fitting against the surface of a tube to make a seal between them.

Press fittings are quick to install and unlike solder fittings do not require the use of heat/blow torch to make a joint.

Who is BS 8537 for?

Fitting manufacturers in the UK, Europe and the Far East
Procurers of press fittings
Construction industry consulting engineers
Construction and engineering consultants
Mechanical service contractors
Local authorities.

BS 8537 gives methods of test for copper press end connections of plumbing fittings up to 108 mm in diameter, used for the purpose of joining copper tubes conforming to BS EN 1057 and non-copper metallic tubes that are intended for use in hot and cold water, heating and cooling systems, natural gas and liquefied petroleum gas systems.

BS 8537 is related to parts of the BS EN 1254 Copper and copper alloys. Plumbing fittings series of standards for copper and copper alloy fittings for joining metallic tubes or plastics pipes. BS EN 1254 is published in five parts:

Part 1: Fittings with ends for capillary soldering or capillary brazing to copper tubes
Part 2: Fittings with compression ends for use with copper tubes
Part 3: Fittings with compression ends for use with plastics pipes
Part 4: Fittings combining other end connections with capillary or compression ends
Part 5: Fittings with short ends for capillary brazing to copper tubes

Contents of BS 8537 include:

Scope
Normative references
Terms and definitions
Operating temperatures and pressures
Plumbing fitting press end and tube compatibility
Plumbing fittings
Evaluation of plumbing fittings
Type tests
Routine tests
Designation
Permanent and durable marking
Documentation
Copper and copper alloys commonly used for the manufacture of plumbing fitting press ends
Method for testing the leaktightness of joints and tube under internal hydrostatic pressure
Method for testing leaktightness of joints and tube under internal pneumatic pressure
Method for testing resistance to pull-out
Test method for resistance of plumbing fittings with Type 1 press ends to temperature cycling
Test method for the resistance of joints to working temperature
Method for testing the resistance of joints with tubes to pressure cycling
Test method for the leaktightness of joints with tube under vacuum
Test method for the resistance of joints and tube to vibration
I.4.3.2.1 Carry out a test for leaktightness under internal pneumatic pressure in accordance with 8.4.1.2
Test method for the resistance of joints to static flexural strength for plumbing fittings with Type 2 press ends
Test method for the resistance of joints to static flexural strength for plumbing fittings with Type 2 press ends
Test method for the resistance of joints on plumbing fittings with Type 2 press ends to high temperature
Pressure test for plumbing fittings bodies with as-cast microstructure or fabricated by welding or brazing
Determination of mean depth of dezincification
Bibliography
Arrangement of apparatus for leaktightness under internal hydrostatic pressure test
Assembled test sample and apparatus for leaktightness under internal pneumatic pressure test
Test assembly for resistance to pull-out test
Test assembly for systems based on tubes measuring ≤54 mm
Test assembly for systems based on tubes measuring 66.7 mm to 108 mm 28
Cycle times
Typical test arrangement for testing the resistance of joints with a tube to pressure cycling
Typical test assembly
Test assembly for a vibration test
Typical test assembly for testing the resistance of joints of plumbing fittings with Type 2 press ends to static flexural strength
Test assembly for testing the resistance of plumbing fittings to high temperature
Typical arrangement of apparatus and test sample for an internal pressure test of plumbing fitting bodies with as-cast microstructure or fabricated by welding or brazing
Example of contiguous fields
List of tables
Operating temperatures and pressures for Type 1 and Type 2 press ends
Minimum wall thicknesses of copper tube with R250/R290 temper conforming to BS EN 1057 and suitable for press end jointing
Minimum bore diameter
Tests for plumbing fittings with Type 1 and Type 2 press ends
Temperature cycling parameters for water applications
Vibration test parameters
Examples of copper and copper alloys commonly used for plumbing fittings
Tensile force
Bending force

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