Electrical isolator

A method of forming one or more electrical isolators, said method comprising:

• connecting a first fluid-carrying member to a second fluid-carrying member using a resistive, semi-conductive or non-conductive component;
• sealing said resistive, semi-conductive or non-conductive component against said first and second fluid-carrying member such that said resistive, semi-conductive or non-conductive component is able to convey fluid flowing from said first fluid-carrying member to said second fluid-carrying member;
• winding a fibre and resin mixture around said first fluid-carrying member, said resistive, semi-conductive or non-conductive component and said second fluid-carrying member so as to encircle said first fluid-carrying member, said second fluid-carrying member and said resistive, semi-conductive or non-conductive component, wherein said resin mixture comprises resin and a conductive additive;
• curing said fibre and resin mixture;
• and
• applying a surface treatment to the first and second fluid-carrying members and the resistive, semi-conductive or non-conductive component, and then winding the fibre and resin mixture directly onto the surface treatment of the first fluid-carrying member, the resistive, semi-conductive or non-conductive component and the second fluid-carrying member.

A method of forming one or more electrical isolators, said method comprising:

• connecting a first fluid-carrying member to a second fluid-carrying member using a resistive, semi-conductive or non-conductive component;
• sealing said resistive, semi-conductive or non-conductive component against said first and second fluid-carrying member such that said resistive, semi-conductive or non-conductive component is able to convey fluid flowing from said first fluid-carrying member to said second fluid-carrying member;
• winding a fibre and resin mixture around said first fluid-carrying member, said resistive, semi-conductive or non-conductive component and said second fluid-carrying member so as to encircle said first fluid-carrying member, said second fluid-carrying member and said resistive, semi-conductive or non-conductive component, wherein said resin mixture comprises resin and a conductive additive;
• and
• curing said fibre and resin mixture;
• wherein each axial end of the resistive, semi-conductive or non-conductive component has an axially extending flange, and each of the first and second fluid-carrying members has an axially extending flange, the method comprises inserting the annular flanges of the first and second fluid-carrying members into or over a respective axially extending flange of the resistive, semi-conductive or non-conductive component, and the winding step involves winding the fibre and resin mixture around the annular flanges of the first and second fluid-carrying members and the resistive, semi-conductive or non-conductive component.