BS 6129-1:1981
Current
The latest, up-to-date edition.
Hardcopy , PDF
English
31-07-1981
Foreword
Cooperating organizations
Code
1. Scope
2. References
3. Definitions
3.1 Nominal size (DN)
3.2 Movement
3.3 Expansion joints
3.4 Effective area
3.5 Expansion joint components
3.6 Associated equipment
4. Materials for convolution manufacture and
precautions to avoid corrosion in service
4.1 General considerations affecting the choice of
material for the convolutions of a bellows
expansion joint
4.2 Precautions during storage, installation and use
to avoid damage due to corrosion
4.3 Typical materials used in the fabrication of
bellows convolutions
5. Application and use of expansion joints
5.1 General
5.2 Thermal expansion of various pipe materials
5.3 Unrestrained expansion joints
5.4 Restrained expansion joints
5.5 Special service conditions
6. Definition of design conditions and working
conditions and classification of inspection
procedures
6.1 General
6.2 Design conditions
6.3 Working conditions
6.4 Classification of inspection procedures
7. Information to be provided by the purchaser and
the manufacturer
7.1 Information to be provided by the purchaser
7.2 Information to be provided by the manufacturer
8. Pre-installation inspection and testing
8.1 General
8.2 Class I
8.3 Class II
8.4 Class III
9. Identification, protection, packing, transportation
and installation
9.1 Identification
9.2 Protection
9.3 Packing and transportation
9.4 Installation
10. Testing of systems containing expansion joints
10.1 General
10.2 Cases where a standard pressure test, in accordance
with 10.1.5 on a system including expansion joints
is not reasonably practicable
11. Guide for maintenance of expansion joints after
installation
11.1 General
11.2 Inspection after first full movement
11.3 Periodic inspection after an agreed interval of
time
11.4 Accessibility
12. Modifications to pressure systems incorporating
expansion joints
12.1 General
12.2 Examples of modifications hazardous to systems
containing all types of expansion joints
12.3 Examples of modifications particularly hazardous
to systems containing unrestrained axial expansion
joints
12.4 Examples of modifications particularly hazardous
to systems containing restrained expansion joints
13. Certification
Table
1. Classification of inspection procedures
Figures
1. Typical system using unrestrained expansion joint
2. Examples of unsafe practice in a system using
unrestrained expansion joints
3. Diagrammatic explanation of cold pull of
unrestrained expansion joint
4. Typical system using a tied double expansion joint
with hinged-end tie-bars
5. Typical system using a tied double expansion joint
with spherical-ended tie-bars
6. Typical system using two single gimbal expansion
joints
7. Typical system using one single hinged expansion
joint and two single gimbal expansion joints
8. Typical systems using single hinged expansion
joints
9. Examples of unsafe practice in systems using gimbal
expansion joints
10. Examples of cold pull in a piping system with
restrained expansion joints
11. Systems using a pressure-balanced expansion joint
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