product update TOP COATS
Total and Arkema develop high performance topcoat
Total Petrochemicals and Arkema have developed a polyethylene-based top coat system claimed to meet the most demanding market requirements. The system is based on Arkema’s new generation Orevac 18410 adhesive in combination with Total’s X-sene HDPE 4206B black bimodal hexene topcoat compound.
The HDPE 4206B polymer
compound offers a specific gravity of 0.953 and is said to provide outstanding perfor- mance in pipe coating applications. The new grade calls on
Total’s extensive experience in development of bimodal PE resins and is said to exploit the ability of hexene co-monomers to improve mechanical and ESCR performance without compromising on processing characteristics. The 4206B
THERMAL COATING
Spray-on energy saving solution
Nansulate Diamond is a fast curing coating developed by US-based Industrial Nanotech for thermal insulation of metal pipes and associated equipment. The coating is intended for application by spraying or by brush or roller and can be used direct on the metal surface. Full cure is reached in between 2 and 10 days. Nansulate Diamond is said to be suitable for operation at
between -40 and +205˚C and is claimed to be highly resistant to humidity. Energy losses are said to be reduced by around 20%, resulting in a payback time of less than one year in typical applications. ❙
www.nansulate.com
November 2012 | PIPELINE COATING 47
grade has an MFI rating of 35. Arkema developed its
Orevac 18410 adhesive for use with the new HDPE by optimising the maleic anhy- dride repartition in the ethylene chain, according to Laurent
Quillet, development manager at Arkema for pipe coating and industrial applications. “With this new generation
of adhesive, we have improved adhesion between the epoxy primer and the HDPE 4206B topcoat significantly, especially at higher tempera- ture,” says Quillet. The new adhesive is said to
operate safely up to 100°C without compromising on low temperature performance. Bond failure is cohesive across the full range of expected operating temperatures. Quillet says the new top
coat system combination allows pipeline operators to push up operating tempera- tures or to provide a higher safety factor. The system was used in parts of the Nord- Stream pipeline. ❙
www.arkema.com ❙
www.totalpetrochemicals.com
INSTRUMENTATION
Portable defect location
Vivax Metrotech’s vLocDM2 system is said to simplify the detection and inspection of underground pipelines and joints for indications of leakage. According to the company,
degraded joint flange insulation is one of the most common causes of network damage due to compromised cathodic protection. The vLocDM2 is said to enable such problems to be identified and located with ease.
The portable vLocDM2 unit functions by detecting changes in current frequency at defects and requires one hard connection to the pipeline.
The vLocDM2 can be
powered from the cathodic protection system if required. ❙
www.vxmt.com
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