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SteelPipeC

oating

DOW POLYOLEFIN MATERIALS FOR

STEEL PIPE COATING

About Steel Pipe CoatingCoating a steel pipe in plastic can help to p revent or minimize the

possibility of pipeline corrosion as a result of extreme external

conditions, mechanical impacts or degradation by heat or UV

irradiation. Plastic coating systems typically consist of three-

layers: a fusion bonded epoxy (FBE) applied to the surface of

the steel pipe, an adhesive, and a top-coat made from polyolefin

materials. Over the last ten years, the steel pipe coating industr y

has migrated from the common use of low density polyethylene

(LDPE) top-coats to medium density polyethylene (MDPE) and highdensity polyethylene (HDPE) top-coats. The main reasons for the

change include higher operating temperatures for pipelines and

the industrys enhanced understanding of crack and resistance

needs in extreme climatic conditions.

Requirements for Polyolefin Materials in

Steel Pipe Coating Systems

Critical requirements for polyolefin materials used in three-layer

steel pipe coating systems include:

Excellent adhesion and adhesion retention.

Durability.

Crack resistance.

Long-term stability.

Low levels of built-in stress during the coating process.

New Polyolefin Materials for Steel PipeCoating

Dow has introduced new top-coat and adhesive polyolefin

materials for three-layer steel pipe coating systems:

DOW HDPE 12110G, a black high density polyethylene

(HDPE) top-coat material that offer excellent environmental

stress crack resistance (ESCR), excellent physical properties

and easy processing.

AMPLIFY GR 320, a grafted adhesive resin that offers

excellent adhesion to both the FBE and top-coat layers in athree-layer coating system, in addition to easy processing,

mechanical strength at high and low temperatures, good

temperature resistance and low water absorption.

A three-layer steel pipe coating system comprised of DOW HDPE

12110G and AMPLIFY GR 320, together with an FBE bonded directly

on the steel pipe, can help deliver good coating performance for

the lifetime of oil and gas pipelines while also offering excellent

processability on conventional pipe coating lines.

Dow: A Leader in the Plastic Pipes

Industry

Dow is a leading global plastics supplier and the number one

global producer of polyethylene.

Dow has manufacturing sites on five continents, providing the

flexibility to supply materials to pipe manufacturers anywhere

in the world.

Dow has a 25-year track record in the development of

innovative products and solutions for the global pipe market,

backed by significant R&D programmes and experts with

application-specific knowledge.

TM Trademark of The Dow Chemical Company (Dow) or an affiliated company of Dow

Winding Technology for Three-Layer Steel Pipe Coating. (Source: Dow)

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The principles of Responsible Care and Sustainable Development influence the production of printed literature

for The Dow Chemical Company (Dow). As a contribution towards the protection of our environment, Dows

printed literature is produced in small quantities and on paper containing recovered/post-consumer fiber and

using 100 percent soy-based ink whenever possible.

NOTICE: Any photographs of end-use applications in this document represent potential end-use applications

but do not necessarily represent curren t commercial applications, nor do they represent an en dorsement by

Dow of the actual products. F urther, these photographs are for illustration purpose s only and do not reflect either

an endorsement or sponsorship of any other m anufacturer for a specific potential end -use product or application,

or for Dow, or for specific products manufacture d by Dow.

NOTICE: No freedom from infringement of any patent owned by Dow or others is to be inferred. Because use

conditions and applicable laws may differ from o ne location to another and may chan ge with time, the Customer

is responsible for determining whether product s and the information in this document are app ropriate for the

Customers use and for ensuring that the Customers workplace a nd disposal practices are in compliance with

applicable laws and other government al enactments. Dow assume s no obligation or liability for the information

in this document. NO WARRANTIES ARE GIVEN; ALL IMPLIED WARRANTIES OF MERCHANTABILITYOR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.

NOTICE: If products are described as experimental or developmental: (1) product specifications may not b e fully

determined; (2) analysis of hazards and cau tion in handling and use are required; (3) there is greater p otential for

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samples of such products, Dow is not obligated to supply or otherwise commer cialize such products for any use or

application whatsoever.

NOTICE REGARDING MEDICAL APPLICATION RESTRICTIONS: Dow will not knowingly sell or sample any

product or service (Product) into any commercial or developmental application that is intended for:

a. long-term or permanent contact with internal bodily fluids or tissues. Long-term is contact which exceeds

72 continuous hours;

b. use in cardiac prosthetic devices regardless of the length of time involved (cardiac prosthetic devices

include, but are not limited to, pacemaker leads and devices, artificial hearts, heart valves, intra-aortic

balloons and control systems, and ventricular bypass-assisted devices);

c. use as a critical component in medical devices that support or sustain human life; or

d. use specifically by pregnant women or in applications designed specifically to promote or interfere with

human reproduction.

Dow requests that customers considering use of Dow products in medical applications notify Dow so that

appropriate assessments may be conducted.

Dow does not endorse or claim suitability of its produ cts for specific medical applications. It is the responsibility

of the medical device or pharmaceutical manufacturer to determine that the Dow product is safe, lawful, and

technically suitable for the intended use. DOW MAKES NO WARRANTIES, E XPRESS OR IMPLIED,

CONCERNING THE SUITABILITY OF ANY DOW PRODUCT FOR USE IN MEDICAL APPLICATIONS.

Published OCTOBER, 2010.

2010 The Dow Chemical Company

Trademark of The Dow Chemical Company (Dow) or an affiliated company of DowResponsible Care is a service mark of the A merican Chemistry Council.

Dow is a partner in the A merican Chemistry Council Responsible Care initiative.

Form No. PN-003-14801

Dow is a diversified chemical company that

combines the power of science and technologywith the Human Element to constantly

improve what is essential to human progress.

The Company delivers a broad range of products

and services to customers in approximately 160

countries, connecting chemistry and innovation

with the principles of sustainability to help

provide everything from fresh water, food

and pharmaceuticals to paints, packaging and

personal care products. In 2008, Dow had

annual sales of $57.4 billion and employed

approximately 46,000 people worldwide. The

Company has 150 manufacturing sites in 35

countries and produces approximately 3,300

products. On April 1, 2009, Dow acquired Rohm

and Haas Company, a global specialty materials

company with sales of $10 billion in 2008,

98 manufacturing sites in 30 countries and

approximately 15,000 employees worldwide.

References to Dow or the Company

mean The Dow Chemical Company and its

consolidated subsidiaries unless otherwiseexpressly noted. More information about Dow

can be found at www.dow.com.

For more information about Dow products

available for plastic pipe applications, please

visit www.plasticpipes.com

ABOUT DOW

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