GLOBE LANE, DUKINFIELD, SK16 4UY, UK: +44 (0) 161 330 4551 : www.northpoint.ltd.uk

MR. PHILIP DAWSON MBADIRECTOR: TECHNICAL & ORG.

DEVELOPMENT

About Philip Dawson MBA

1. Over 30-years experience in the coatings application industry

2. Director of Northpoint Ltd for 12-Years

3. Executive MBA in 2006

4. Qualified BS EN ISO 9001: 2015 Lead Auditor IRCA Lic. A-17940, Cert. 3709

5. Qualified BS EN ISO 9001: 2008 Lead Auditor IRCA Lic. A-17395, Cert. 0689

6. Qualified BS OHSAS 18001: 2007 Lead Auditor IRCA Lic. A-17625, Cert. 3794

BS EN ISO 9001 : 2008Cert. # 2611

The Main Reasons to Choose FBE Coatings for Internal Lining

1. Over 40-Years of Proven Field Use

2. Corrosion Protection

3. Flow Characteristics

4. Preventing the Formation of Organic Solids

5. Prevent Scaling

6. CP even when Blistered

7. Easy to detect FBE failure with Direct Current Voltage Gradient (DCVG) Surveys affording the option of a Low-Cost Local Repair

Design Considerations

1. Bolt holes should be widened to take account of the FBE coating – Northpoint suggest 2 mm

2. Line-of-sight for shot-blasting operations, the shot-blast media, like a beam of light or a bullet will not go around corners

3. Allow sufficient bore to allow powder to flow-out after dipping, the actual dip & melt/flow process takes around 20 seconds in the fluid bed

4. No Sharp Edges – sharp edges and welds not smoothed will present an area of weakness in the applied coating

5. Weight & Size – up to 3000 kg, and 6 m long for overpainting

6. Engineering Drawings – make them as clear & as easy to follow as possible for the coating applicator

Usual Internal Coatings Applied

Cement Lining & FBE are the two main coatings applied to pipe and fitting internals.

Cement;

The flow of water through cement lined pipes leads to leaching of calcium hydroxide decreasing the pH

of the water and eventual corrosion of the pipe.

FBE;

Epoxy is inert to water chemistry providing a long-term solution for corrosion protection.

Failure Modes of FBE Coatings

All coatings can fail;

Surface Preparation – the main reason for coating failure. FBE requires a ‘near-white’ 40 - 100µ profile typically prepared steel surface. Northpoint use ISO 8503-5 Std to measure profile.

Excessive Holidays – mostly caused by over-heating. Northpoint inspects as SP0188 to ensure parts are holiday free at the point of dispatch.

Application Temperature – it is critical that parts are not ‘over-heated’ this causes the FBE to become brittle, have reduced adhesion and provide lowered barriers to oxygen. Northpoint operate at ‘straw-bronze’ colour reference to ensure correct application temperature.

Soil Stress – FBE is largely unaffected.

Cathodic Disbondment – CP will cause water to penetrate the coating more rapidly, it combines with surface salts to blister the coating. FBE remains a non-shielding coating even when blistered to maintain the CP.

Chalking & Disbondment – ‘chalking’ from UV exposure will reduce FBE thickness up to 50µ when in sunlight. Protection from coverings and over-painting reduces this impact to almost zero.

Cleaning & Blasting Process

An initial check for hydro-carbon contamination followed by solvent cleaning and potable water rinse where necessary

UV Light inspection showing patch contamination and allowing efficient final clean where necessary

Abrasive Blast Clean using G24 chilled iron grit to a profile of 50 - 100µ, SA 2.5 ISO 8502-03

Removal of dust before pre-heating

Records maintained of test results and retained for reference before issue of final Certificate of Conformity and Certificate of Test

The FBE & 2k PU Coating Process

FBE at 300µ minimum is applied to pre-heated fittings by fluid-bed dip or electrostatic spray method depending on part complexity

Masking is applied to ensure the 2k PU coating is not applied to internal areas

2k PU coating system (etch-primer & coloured top-coat) gravity-gun spray applied at an additional circa 50µ

Parts are then force-dried overnight

A final check on coating finish for visual continuity and thickness

Testing Results

FBE

DSC cure test by external test-house to assure full cure effected (where required)

Minimum coating thickness of 300µ and a typical mean of 500µ achieved

Routine inspections to demonstrate no coating defects before dispatch; blast profile, blast cleanliness, holidays, adhesion, impact resistance and thickness

Close-Out inspections by NACE III Inspector (where required)

Northpoint Capabilities

1. DWI Approved Coatings – Resicote R4, Scotchkote 206N & Eurokote 468 Thixo

2. WRAS Approved Coatings – Resicote R4, Jotaguard VA 5001

3. Approvals in Progress – Scotchkote 162PWX (DWI & NSF Std. 61) & Jotaguard VA 5001 VA (for direct WRAS Approval by NP)

4. Application of NORSOK Std. Coating Systems go to; http://www.northpointspecialistcoatings.com/wp-content/uploads/2014/07/Norsok-Standards-PDF-.pdf

5. Application of FBE + 2k PU

6. Fluoropolymer Systems – ECTFE, PFA, FEP, PTFE

7. ITP’s/PP’s to describe and manage the process

http://www.dwi.gov.uk/drinking-water-products/approved-products/soslistcurrent.pdf

Contact Details and Where to Get Copies of this PresentationContact Details;

+44 (0) 161 330 4551 – Office

+44 (0) 7 800 910 972 – Mobile/Cell

philip@northpoint.ltd.uk

https://www.linkedin.com/in/philipdawson/

References;

1 – D. Neal, “Pipeline Coatings Failure – Not Always What You think It Is” 2000

2 – R. Norsworthy, “Fusion Bonded Epoxy – A Field Proven Fail Safe Coating System” 2004