CONTAINMENT SPECIAL
Lakeland and Hoganess. ‘We emphasise a close dialogue with the fish farmers and guide them in the purchase process in order to find the best products available for their specific needs,’ explains David Goodlad, General Man- ager of NSS.
As a MøreNot subsidiary, NSS has an expe- rienced partner. Norway is considered world leader within the field of salmon farming. NSS supply nets in both traditional nylon and Dyneema®
MØRENOT
tions have provided a natural breeding ground for the development of sturdy and durable materials. Quality and customer confidence have always been the governing principles of product development.
‘In recent years, we have managed to develop even stronger nets of nylon and Dyneema®
durability. The Dyneema®
netting. Product development is an on-going process in the MøreNot Group and takes place in close co-operation with cutting- edge research institutions, fish farmers and suppliers. MøreNot has a separate depart- ment for consultancy services that engages in analysing, dimensioning and certification of mooring equipment and nets. ‘As a supplier to the fish farming industry we are fully aware of our responsibility to prevent escapes. Not only through development of durable and strong materials, but also through co-operation. We encourage correct use of the nets to avoid damage,’ says Goodlad.
Norwegian standard Prevention efforts relating to escapes started in Norway as early as 1988. An industry stand- ard for the assembly of nets was prepared, together with DNV (Det Norske Veritas). This work was continued by Standards Norway in co-operation with the Directorate of Fisheries, research and development institutions such as SINTEF, consulting companies, fish farmers and suppliers. It resulted in the Norwegian industry standard NS 9415.
‘MøreNot has been an active contributor both in the composition of this standard and in subsequent revision rounds. By sharing ex- periences, we have gained valuable insight in other areas. Today, there are no international standards that prevent escapes. Thus, the NS 9415 is the prevailing industry standard,’ explains Nina Hildre, MøreNot Export Manager - Aquaculture.
The standard dictates distinct requirements for inspection of local conditions, risk analysis, design, dimensioning, execution, assembly and operations.
‘In the light of these requirements, we pro- duce certified netting made of both nylon and Dyneema®
NS 9415 IS THE
NORWEGIAN INDUSTRY STANDARD
. The nets are usually treated with coatings and/or antifouling in order to mini- mise fouling and abrasion. This extends the life cycle of the nets and prevents escapes. We are always in the forefront of product development and follow the latest research on new coat- ings and antifouling products that provide an even better protection of the fibres, especially with regard to the widespread high use of net washers today,’ says Hildre.
The world’s strongest fibre Quality has been the core value of the Norwe- gian company MøreNot since its establishment in 1948. The company operates all along the coast of Norway, in addition to several subsidi- aries abroad. The challenging weather condi-
www.fishfarmer-magazine.com
, in regard to breaking strength and fibre, made by DSM,
is exceptional because of its very high breaking strength. It is also extremely resistant to abra- sion and UV radiation,’ states Hildre. The move towards larger net cages makes replacing traditional nylon nets with Dyneema® nets very advantageous. One advantage is that the nets can be made with much thinner fibres but still have the same breaking strength. ‘These qualities result in reduced weight – the nets weigh less than half of what regu- lar nets do – while the antifouling and copper consumption is reduced by half. Water flow through the nets is also improved, having a positive effect on the fish environment. The Dyneema®
nets also maintain their volume bet- ter in strong currents, putting less tension on the cages and mooring and reducing service costs. Reduced weight also represents easier handling and lessens the need for upgraded boats and lifting equipment,’ says Hildre. MøreNot assembles nets at different locations in Norway and with their partners abroad, among them NSS in Shetland, which is dedi- cated to the Scottish market. MøreNot also has a long-standing co-opera- tion with a net manufacturer in China. This collaboration has recently been expanded in order to face fierce price competition, as well as increasing the production capacity. It is an invariable requirement at MøreNot that the Chinese manufacturer delivers the same high quality on material and assembly as the rest of the group. ‘We have invested heavily in training in China, with regards to producing netting and assembling nets. With this, the products meet our quality standards and are as resistant to escapes as the nets produced in Norway,’ states Hildre.
Unique knots
The prevention of escapes involves knowing what the nets tolerate. They are made with the experience of decades of trial and error. It is important that they can endure severe weather conditions, high waves and strong currents. ‘To ensure that our nets can tolerate the strains they are exposed to we have tested the strength of the ropes with various knots and loops. We have invested a lot of time and resources in establishing the best way to tie loops and to attach rings and reinforcements. These are critical factors in the struggle against escapes and we can document that our solu- tions live up to our promises,’ she explains.
Advanced testing facilities MøreNot Group frequently uses a test tank owned by SINTEF Fisheries and Aquaculture,
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