MJI 10, 18 & 19 Introduction

3t Training Services provides training accredited by the Engineering Construction Industry Training Board (ECITB).

The course is based on the following Training Standards:

• MJI 10 – Hand Torque Bolted Connections.
• MJI 18 - Hydraulic Tensioning of Bolted Connections.
• MJI 19 – Hydraulic Torque Bolted Connections.

This handbook has been written to complement the 3t Training Services training course on the above training standards, providing a training manual to be used as a source of reference to assist the competency of operatives / trainees.

Bolted Flanged Connections come in different guises and can seem to be very straightforward in design and use.

The design engineering behind the flange make-up is intense. The combination of flanges bolts and gasket (if utilised) is complicated. Leak free joints are essential to maintaining pipework integrity, system safety and the environment.

Unfortunately errors in the way we work have arisen, endangering the safety of the system which in turn affects the quality of the work being undertaken and causing the overall cost to spiral. These errors cannot be simply dismissed, they have to be remedied.

It is essential for the correct training to be given to all individuals that have a requirement to tighten any joints at all. Fully trained personnel are taught the importance of using the correct materials, tightening equipment, and more importantly the procedures to be followed.

This reference book is an addition to the training that is given and gives additional information which is important in assisting to maintain flange integrity and should only be used by personnel who have attended the 3t Training Services training course.