Protect Your Pipe: Invest in the Next 100 Years. Jeff Blakely Sr. Sales Engineer May 3, 2017

Transcription

1 Protect Your Pipe: Invest in the Next 100 Years Jeff Blakely Sr. Sales Engineer May 3, 2017

2 Outline Introduction Corrosion Review Corrosion Protection of DIP V-Bio Polyethylene Encasement Zinc Coating System Questions 2

3 INTRODUCTION

4 INTRODUCTION Jeff Blakely B.S.M.E. from UND With AMERICAN for 7 years AMERICAN Founded in Acres Our Divisions 4

5 CORROSION REVIEW: MIC & GALVANIC

6 Corrosion Mechanisms Microbiologically Induced Corrosion (MIC) Sulfate Reducing Bacteria = H 2 S Acidithiobacillus Bacteria = H 2 SO 4 Graphitic Corrosion / Pitting Galvanic Corrosion Need Anode, Cathode, Electrolyte, Current Path Break the Cycle = Stop Corrosion Galvanic Series 6

7 CORROSION PROTECTION: V-BIO ENHANCED POLYWRAP

8 V-Bio Polyethylene Encasement What is it? Three Layer Co-Extruded Polyethylene Fused into on 8 mil Thick Film Inner Layer Infused w/ VCI & Biocide How Does it Work? Eliminates Organisms (MIC) Controls Galvanic Corrosion Volatile Corrosion Inhibitor Prevents Electron Flow Between Cathode/Anode Molecular Barrier Between Iron and Electrolyte Not a Consumptive Process 8

9 CORROSION PROTECTION: ZINC COATING

10 History of Zinc Coatings 1670 s Indian Armor Dipped in Molten Zinc 1958 Zinc Coated CI Pipe Manufactured in Europe 1984 DIP Manufacturers in the U.K. Standardized on Zinc Coating 1837 Stanislas Sorel Patented Galvanizing 1982 AMERICAN Supplied its First International Zinc Coated Order 1995 Zinc Under Bitumen Paint Typical in Europe 10

11 History of Zinc Coatings Today All Domestic DIP Manufacturers Supply Zinc with Asphaltic Topcoat International Manufacturers Supply Differing Zinc Formulations and Multiple Topcoat Options (Polyurethane, Epoxy, etc.) 11

12 ISO Standards ISO External Zinc-Based Coating Part 1: Metallic Zinc with Finishing Layer Part 2: Zinc Rich Paint with Finishing Layer 99.99% Zinc by Mass (Part 1) Applied Via Arc-Spray Minimum Average Mass = 130 g/m 2 AMERICAN uses 200 g/m 2 Minimum Local Mass = 110 g/m 2 Finishing Layer 12

13 How is the Zinc Applied? Pipe Surface Cleaned & Preheated Arc Spray Process High Purity Zn Atomized Clean Air Propels Droplets on to Rotating Pipe Zn Cools and Adheres to Surface 13

14 Frequently Asked Questions How much longer will the pipe last? Situational but Substantial Data from Europe Suggests Hundreds of Years 1991 DIPRA Study - Everglades, FL 44 Years w/ Zn & w/0 Polywrap Zero Measurable Corrosion with Zn & Poly What Happens if the Coating is Scratched? Creates Galvanic Couple Zinc Reacts and Leaves Protective Compounds In this process, corrosion by-products known as zinc salts or zinc patina, form a dense, tightly adherent layer between the annealing scale and the finishing topcoat. This layer creates a rugged and long-lasting protective barrier between the iron pipe and the surrounding environment. (American Galvanizers Association, 2011) 14

15 Frequently Asked Questions How Much Does Zinc Coating Cost? Typically 15% More Than Pipe Minimal Compared to Overall Project Why Do I Need Zinc Without Corrosion Issues? Still Extends the Life of DIP Should I Still Spec Polywrap? Economical Insurance 3% of Pipe V-Bio = More Preventative Measures Dielectric Barrier Reduced Friction in Seismic Event Can I use Zinc with CP/Can Zinc Replace CP? Yes / Depends on Situation 15

16 Frequently Asked Questions Can I Use Megalug/FastGrip Gasket with Zinc? Yes Are Zinc Coated Fittings Available? Yes. Type Depends on Supplier. How Do I Handle Damaged Zinc? Small Areas OK Larger Repaired with Zinc Paint 16

17 What You Need to Know Zinc Coating is a Life-Extension Product Proven Track Record (Service/Studies) Standardized Product/Application Becoming the New Normal Cement Lining (1922) DIP vs. CIP (1950 s) Push-On Joint vs. MJ (1950 s) Enhances Already Durable Product Reduces Life-Cycle Costs Pressure Class & Zinc vs. Thicker Wall Zinc Coating in-lieu of Cathodic Protection Cost of Zinc vs. Overall Project = ROI 17

18 QUESTIONS?