METHOD STATEMENT FOR CATHODIC PROTECTION PLATES

CONTENTS

1.0 Purpose

2.0 Scope 3.0 Safety

4.0 References

5.0 Construction Drawings 6.0 Cathodic Protection Plates

1.0 Purpose:

The purpose of this Method Statement is to describe the system that will be adopted to allow hydro-testing the Fire Water Lines, prior to Thermit welding the Cathodic Protection Cables.

2.0 Scope:

The scope of this document covers the Fire Water Lines.

3.0 Safety:

3.1 All Employees involved in the construction of the Underground Works, will be briefed on the details of this method statement.

3.2 All employees of will be suitably trained to carry out their specific responsibilities.

3.3Employees involved in the construction operations will be issued with the appropriate task specific P.P.E., which will be worn at all times, during the construction process.

4.0 References:

4.1 TPIT Contractual Documents 4.2 WPS-NSH-001 Welding Procedure

5.0 Construction Drawings:

5.1 2121-00-DW-1675 01 to 06, Page 1 of 1

6.0 Materials

6.1 Steel Plate cut from existing pipe off cuts (Same Diameter)6.2 E7018 Welding Rods

7.0 Cathodic Protection Plates

7.1To allow the Fire Water Lines to Progress prior to the Thermit Welding of the Cathodic Protection Cables, NSH propose to weld a 100 x 100 mm plate, (from pipe off cut) to the Fire Water Line Pipe, at the positions were Thermit Welding for the Cathodic Protection Cables is required.

7.2The areas were the Cathodic Protection Plates are required are detailed on the construction drawings, and these areas will be identified and marked on the pipe, out on site.

7.3The areas will be prepared in the following manner: -

1) The bitumen Protective Coating will be removed from the marked up area.

2) The area will be cleaned to remove any traces of oil and grease.

3) An angle grinder will be used to prepare the surface of the carbon steel pipe for welding.

7.4Using a qualified welder, NSH will then weld the 100 x 100mm Plate into position, using a 6mm C.F.W.

7.5The weld will be subjected to Visual Inspection and PT Inspection. The reports/certificates will be recorded in the test package.