E-CTFE (Halar) glass-reinforced vessel

Final assembled tank

In June 2015 we completed the fabrication of a 4m diameter, 3m tall E-CTFE/GRP vessel for an overseas customer.

Roperhurst was aproached to fabricate a storage vessel with exacting chemical resistance.  In conjunction with the project designers and European thermoplastic suppliers, it was agreed that the vessel would be fabricated from glass-backed E-CTFE (also known as halar) reinforced with chemically resistant fibreglass resin.

The vessel was to be fabricated to BS4994 (Specification for design and construction of vessels and tanks in reinforced plastics), welded by staff qualified under EN13067 and laminated by staff qualified to BS4994.

Roperhurst has six members of staff certified under EN13067 to weld halar, and the team worked tirelessly to meet the tight deadlines of the end client.

Mid-section in progressThe project had added complexity caused by space constraints at the client's site, which meant that the vessel could only be manoeuvred into position if it was sectional.  

We therefore fabricated the vessel in three flanged sections, a base section, a larger mid section and a cone section.  

Cone section - early GRP lay up

The base section had four outlets, the mid-section a single outlet and the cone several inlets/vents. A steel frame was fabricated to support process-related items.

The tank was finished with a purple gel coat and every joint fully spark tested once more.

Tank loaded for transport

The tank was fully assembled in our works for client inspection, and then was disassembled for onward transportation.

Due to the size of the vessel, air transport was ruled out and it was despatched by road and ferry to its final destination.

Midway through the project we were also asked to produce a further three rectangular GRP storage tanks which were completed to timescale and despatched to site.

We provided a team to the overseas site to oversee final installation and to carry out final spark testing of the vessel before commissioning.