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Rubber boots of deck penetrations treated with a flexible, spray-applied Pure Polyurea coating The Seminar will be chaired by Deon Nieuwoudt, NZSSDA Chairman. Les Boulton, NZ Consultant to the Nickel Institute: “Service experience with stainless steels in waters” Campbell Batts, Managing Director, Spiraweld Stainless Ltd: “Surface treatments for fabricated stainless steel items to improve corrosion resistance” Tim Burborough, Asset Specialist - Mechanical, & Paul Soakell, Reliability Engineering Manager, Watercare Services Ltd, Auckland: “Applications of Stainless Steels in Water Treatment”. NZ Stainless Steel Development Association proudly presents a half-day Seminar: PERFORMANCE OF STAINLESS STEELS www.engineeringnews.co.nz 21 IN WATERS Guidelines for Achieving Top Performance THE SPEAKERS WHERE & WHEN DATE: Wed 20th April 2016. TIME: 1pm to 4:30pm 3pm - Afternoon tea (provided) VENUE: Conference Centre, HERA House, Gladding Place, Manukau, Auckland. In many industries stainless steels are used in contact with water – drinking water, seawater, brackish water, ground water, bore water, cooling water and waste water. Water conservation, environmental impact, sustainability, health and safety – all sound familiar? Stakeholders require improved returns creating greater demand for Industry to provide quality products at quicker and cheaper prices while being environmentally responsible. Is the answer to build things cheaper, or to do it better and smarter. To provide high quality, sustainable products and services for the longer term, we must look past the next few years and into the future. Stainless steels are being selected for construction of infrastructure for their superior corrosion resistance, durability, hygiene properties, and life cycle benefits. Who should attend ? This not-to-be-missed Technical Seminar will provide guidelines and information for design engineers, fabricators, specifiers and end-users, regarding best stainless steel industry practices in water-use industries. Grade selection, alloy properties, design, welding, post-fabrication cleaning and installation will be discussed. Specific applications of stainless steels in water-use industries will be addressed by the speakers. For more information or to reserve your seat call: 09 262 2885 or email: Be Fast Space is Limited admin@hera.org.nz EN006 weather extremes, excellent flexibility and high impact strength. The ability to walk on a Rhino Linings surface in a matter of minutes means that a facility can be back on line sooner. A major consideration in applying any surface treatment to a structure is the requirement to minimise downtime. Spray coating enables quicker application and less disruption to a client’s operations. “The beauty of our coatings is that they are rapid setting,” says Baker. “We can spray them on and they cure in as little as six seconds.” Unlike all other coatings, Pure Polyureas are not affected by ambient moisture or temperature while being applied which is an important consideration when operating offshore. “Pure Polyurea is a versatile and adaptable material that is an ideal method of protecting offshore structures,” Baker added. “To encourage further uptake by the maritime market, RLA has a portfolio of projects demonstrating the benefits and cost effectiveness of Pure Polyurea.” Where pipes and other equipment penetrate the deck areas of offshore structures, it is important that liquids do not run down the pipes to the ocean below. Most offshore rigs cover these penetrations with a butyl rubber ‘boot’ that is taped to the pipe and the deck. However, the rubber of the boot and the adhesive can be degraded by UV and salt exposure in a matter of months. To extend the operational life of the deck penetration boots, the butyl rubber and the adjacent steel surfaces are usually scuffed and cleaned prior to the appropriate Rhino Linings primer being applied. It is important that all loose coatings, oils and dirt are thoroughly removed before applying the new flexible membrane. Similarly, the surrounding equipment, piping and deck surfaces must be masked off to protect against over spray. One suitable coating material to use with the boots is Rhino Pure Polyurea (PP1195). According to Baker, when applied at a thickness of 2000 microns or greater, and extending 50mm up the pipe and 100 mm onto the deck, creates a liquid tight, weather resistant, flexible interface on all deck penetrations from 100mm in diameter with the long term durability demanded by the marine industry. RLA has been working with spray-applied polyurethane and Pure Polyurea since the mid-1990s and now manufactures a range of consistent formulations in Australia which are suitable for a diverse range of applications. “Pure Polyurea is a relatively modern material that has been developing rapidly during the past 15 years,” Baker says. Pure Polyureas are formed when a liquid isocyanate is mixed under high pressure with an amine-driven resin solution. Isocyanates are reactive because the double covalent bond attaching the carbon atom to nitrogen and oxygen atoms is easily broken to form single bonds in the more stable tetrahedral configuration around the carbon atom. The Rhino Pure Polyurea comes as a two-part solution that is mixed under high temperature and pressure (3000psi at 65ºC) in a specially designed spray apparatus. When applied, the excellent chemical cross linking produces a dense but flexible surface. The high density makes the coating almost impervious to abrasion, water and chemicals. Pure Polyurea coatings ‘snap cure’ to form a solid surface in a few seconds and can be walked on without damage in less than a minute. Another advantage is the ability for it to be sprayed up to 6000 microns thick (and greater) on a sloping or vertical surface without sagging or running. The surface of a RLA coating is easy to maintain, clean and recoat if necessary. Whereas epoxies and paints form a solid, rigid shell, the flexibility of Pure Polyurea coatings allows them to move with the expansion and contraction of the underlying structure as temperatures change. Rhino Linings Australasia Pty Ltd (RLA) was formed in 2001 and established manufacturing and distribution capabilities for the Australasian region. RLA manufacturers its spray applied coatings at a facility on Australia’s Gold Coast and can draw on the more than 30 years experience of its American parent. The company sources all its materials from local suppliers except for some very specialised chemicals which are imported from America. Oil drilling pipes stacked aboard an oil rig


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