Joint materials by butt fusion processes

Business Sectors (Suites): Multi-Utility Network Construction Operations
Developed by: Energy & Utility Skills
Approved on: 01 Mar 2023


​This Standard is about jointing materials by butt fusion processes. Butt fusion processes may be carried out using non-automatic and automatic machines and on parent materials with the same SDR rating, and polymer type. 

Jointing materials by butt fusion includes providing weather protection, checking joint preparation, equipment and consumables, monitoring the jointing process, making butt joints to specification, de-beading, shutting down equipment and dealing with waste. 

This Standard is for anyone who carries out butt fusion jointing.

Performance criteria

You must be able to:

​1. work in line with health, safety and environmental regulations, guidelines and procedures at all times 

2. carry out and review site specific risk assessments in accordance with company procedures 
3. select and wear required personal protective equipment 
4. prepare and make joints in accordance with job instructions and organisational procedures 
5. check any circumstances where job instructions or organisational procedures appear incorrect with appropriate people 
6. check and confirm joint preparations comply with specifications and organisational quality requirements 
7. check that jointing and related equipment and consumables are as specified and fit for purpose including in date calibration where required
8. provide adequate weather protection in line with organisational procedures for the duration of jointing cycles 
9. carry out and monitor jointing operations in accordance with specifications and job instructions and organisational procedures 
10. report any damage or defects to tools, equipment or materials to appropriate people without delay 
11. make butt joints of the required standards and specified dimensional accuracy 
12. de-bead and carry out approved quality assurance tests on the  bead 
13. mark joint and bead so they are identifiable in accordance with organisational procedures 
14. shut down equipment to a safe condition on completion of jointing activities 
15. deal with excess and waste materials and temporary attachments without delay in line with organisational procedures 
16. joint materials by butt fusion processes in line with approved organisational procedures and practices and statutory and regulatory requirements 
17. record and store jointing data and information in organisational information systems 
18. resolve problems that are within your area of responsibility in line with organisational procedures 
19. refer problems you cannot resolve to appropriate people in line with organisational procedures

Knowledge and Understanding

You need to know and understand:

​1. legislation, organisational procedures and codes of practice relating to health, safety and the environment including manual handling, use of equipment, hazardous materials, work in excavations, risk assessments, accidents and personal protective equipment 

2. the personal protective equipment (PPE) required for the work environment
3. the industry standards and organisational procedures relating to butt fusion jointing 
4. why only pipes of similar specifications can be joined together 
5. how to interpret engineering specifications relevant to butt fusion processes 
6. how to operate jointing equipment in line with organisational procedures 
7. different stages that take place during the jointing process and the importance of allowing each phase to complete 
8. the need for pipe support and alignment and the consequences of poor support and mis-alignment 
9. cause and effect of misalignment split defects 
10. problems caused by inadequate bead, excessive bead pipe specifications and how to avoid them 
11. compatability between different materials in relation to standard dimension ration (SDR) rating and polymer type 
12. how defects in materials and consumables can affect butt jointing processes 
13. the importance of jointing equipment calibration and the consequences of poor maintenance 
14. industry quality assurance procedures that can be used to recognise defects including non-destructive and destructive testing 
15. organisational reporting procedures including who to report to about damage and problems 
16. organisational information and data storage systems


Scope Performance

Scope Knowledge





Links To Other NOS

External Links

Version Number


Indicative Review Date

01 Mar 2026





Originating Organisation

Energy & Utility Skills

Original URN


Relevant Occupations

Water Network Construction, Gas Network Construction

SOC Code



Network, Construction, operations, utility, utilities, gas, LPG, hydrogen, water, network, buttfusion, joining, jointing