TPI July 2013

Corrosion prevent ion

Instrumentation tubing optimised for harsh environments

to verify compliance, Parker is able to provide the new Parker Grade 6Mo tubing with mechanical characteristics that are optimally matched to the capability of its 6Mo instrumentation fittings. According to Paul Shaddick, product manager for Parker Hannifin’s instrumentation products division, “Extending the reach of our quality control standards to encompass the manufacturing processes used by our supplier of 6Mo alloy tubing is a major step forward in our product development strategy. Our customers can now obtain all the 6Mo instrumentation connection technology they need for an offshore project from a single source, secure in the knowledge that the components are compatible. This simplifies component procurement and distribution, helps speed installation, and eliminates potential leak paths in 6Mo compression fittings.” Parker Grade 6Mo instrumentation tubing is available in a wide range of imperial and metric sizes up to 25mm (1") OD, and 6Mo A-Lok two-ferrule compression fittings are suitable for the majority of topside applications involving pressures up to 413 bar (6,000 psi).

Many instrumentation system designers specify two-ferrule compression fittings for the assembly of small-bore tubing, and Parker states that the 6Mo version of its A-Lok design is a popular choice for offshore projects. As with all two- ferrule fittings, the rear ferrule needs to be harder than the tube it is gripping so that it ‘bites’ into the tube material during assembly, helping to create a reliable, pressure-tight seal. Parker hardens the rear ferrule of 6Mo A-Lok fittings using its Suparcase process. When ordering instrumentation tubing, customers often simply specify an ASTM standard to their supplier. These standards do not always guarantee an optimum material property for a high integrity tube and fitting combination. The result can be tubing that is harder than necessary, for example, and therefore less than ideal for use with twin ferrule compression fittings. As part of its commitment to helping users improve the integrity andcorrosion resistance of instrumentation systems, Parker ensures that all tubing stocked by the company and its distributors is fully compatible with its range of fittings. After exhaustive testing and analysis of 6Mo tubing, Parker has defined a stringent specification and tolerances for its manufacture that allows the material’s properties to be controlled very precisely. By collaborating with its supplier and auditing the company repair without disrupting production. Composite repair technology offers a long-term performance solution that provides permanent, minimal maintenance repairs. Each composite repair carried out by VED is fully engineered to suit the application, and is designed to achieve optimal bonding to the substrate material and to retain full structural strength and integrity of the repaired asset. VED’s engineering office can provide an entire solution, from the analysis of the problem to the maintenance work on-site.

The design of fluid instrumentation systems for use in harsh and corrosive environments has been boosted by an optimised new grade of 6Mo tubing. The mechanical characteristics of the new Parker Grade 6Mo tubing have been optimised to ensure integrity of connections made using instrumentation compression type fittings from the instrumentation products division of Parker Hannifin. Parker’s long history in special-purpose alloy tube fittings has enabled it to build up a wealth of expertise and knowledge about corrosion resistant materials such as 6Mo. The company has played a formative role in the industry take-up of the alloy, which is now the material of choice for many instrumentation tubing systems on new and refurbished North Sea oil and gas production platforms. Containing at least 6 per cent molybdenum, 6Mo alloy is a super- austenitic stainless steel. The material is more resistant to chloride-induced pitting, crevice attack and stress corrosion cracking than standard 300 series or duplex stainless steel, making it suitable for offshore applications demanding durability and reliability in a hostile environment. Parker produces 6Mo versions of various types of instrumentation tube fittings, together with a series of 6Mo tubing clamps, and can also machine instrument valves and manifolds in the material.

Parker Hannifin – UK ipd@parker.com www.parker.com

Line repair under pressure Damaged line or weakened pressure pipes can cause accidents and unsafe situations inside plants, and it is often necessary to shut down the line to allow maintenance work to be performed.

The company offers leak-sealing solutions with better preventive maintenance, whether steam, hydro- carbons or gas – including over 300 types of chemical – at temperatures ranging from sub-zero to 600°C (1,112°F), and at pressures up to 350 bar (5,076 psi). Typical applications include permanent repairs; equipment longevity; structural strengthening and integrity; and minimal impact to productivity.

VED, Italy, offers specialised support to restore and repair the asset of the line while continuing to work under pressure, by applying protective composite material reinforcement using carbon fibre and special resins. Advanced composites technology combines structural strength and permanent

VED Srl – Italy info@ved.it www.ved.it

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Tube Products International July 2013

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