Quality control

Moreover, FLOATEX offers their customers an internal quality control service for major guarantee of the final product and the quality control service avails itself of the in-house fully equipped laboratory facility making out test certificate to be released to the customer.

In order to insure a constant good quality of its products, Floatex effects a series of Quality Tests on the raw materials, to certify the conformity to the required Standards. These tests are made, for plastic materials, directly in Floatex's laboratory, while for the steel materials we rely on an external test bed an the Mill Certificate that are required of the steel suppliers.

STEEL MATERIALS

Parts subject to tensile stress work, i.e. the central tie rod of the chain support buoys and pick up buoys are Released on the Mill Certificate of the steelworks, in conformity with EN 10204 3.1.B rules.

Plastic part test

ELASTOMER POLYURETHANE

Compact flexible material with high tear, high abrasion resistance and great elasticity. The high elasticity and the high resistance to U.V. Rays and to hydrolysis makes this material ideal for the cover of all manufactured articles, giving resistance to the expanded products Typical applications Casing material for buoys, fenders, hoses and floats.

Elastomer polyurethane Test method Min values required A Min values required B Value
Tensile strength Bs 903 PART A2 20 16 N/mm2
Hardness Din 53505 75 10 Shore A
Elongation at break Bs 903 PART A2 400 360 %
Modules 100 % Bs 903 PART A2 5 4 N/mm2
Moulut 300 % Bs 903 PART A2 10 8 N/mm2
Tear strength Bs 903 PART A3 45 43 N/mm2
Abrasion resistance Din 53516 Max 120 Max 120 mm3
*Note Well:
a) Test result after 2 hrs cured at 110°C.
b) Test result after 7 days in salt water (3 % NaCl) at 70 °C.

Characteristics The below mentioned tests are effected on polyurethane samples, prepared during the covering of the buoy and reticulated in a room temperature for 24 hours and then put in an oven with 110°C. for 2 hours.

To simulate the behaviour of the polyurethane in sea water, the same tests are repeated on material samples subjected to hydrolysis for 7 days with temperature 70°C. in water with a NaCl content of 3%. When this period is finished, the values resulting from the tests, must not suffer losses more than 20% in respect to the values obtained on the sample tested before the hydrolysis test.

EXPANDED POLYETHYLENE

Soft flexible expanded chemically inert material. Available in slabs and strips to be welded together so as to provide finished products of large sizes. Several densities from 25 to 180 kg/m3 with characteristics of strong resiliency and absolutely waterproof.

Typical application Inside of fenders (shock absorbers); Collars for hoses; Making oil and dredging hoses fully self-floating; Anchor pendant and pick-up buoys; Making concentric reducer and Y pieces reducer fully self-floating. Characteristics During the phases of the application of the polyethylene, some samples of materials will be subject to the following test:

Example PE 40 Test method Min values required A Unit
Density DIN EN ISO 845 40 Kg/m3
Tensile strength ISO 1798 0.30 N/mm2
Elongation at break ISO 1798 110 %
Compression stress 30% DIN EN ISO 3386-1 100 KPa
Compression stress 50% DIN EN ISO 3386-1 140 KPa

EXPANDED POLYURETHANE

Expanded rigid material with close-cell-percentage varying according to density. Mixing up two liquid compounds in free or controlled expansion with densities varying from 35 to 500 Kg/m3 produces it. Expanded polyurethane mixed with special spheres can reach 1000 m water depth.

Typical application Filling material for metal and plastic buoys, deepwater, dredging floats. Characteristics If the use of an expanded rigid polyurethane core is expected, during the casting a sample of the material will be taken off and will be subjected to the following tests.

EXAMPLE PU 45 ρ=38Kg/m3 Test method Min values required A Unit
Density DIN EN ISO 845 40 Kg/m3
Tensile strength DIN 53430 0.30 N/mm2
Compression strength DIN 53421      
Perpendicularly to the growth - 0.10 Mpa
Parallel to the growth - 0.15 Mpa

ROTATIONALLY MOULDED POLYETHYLENE

Semi-rigid compact material characterized by high resistance properties. Can be made in several even very high thicknesses as needed for the manufacture of shells, can be applied to various type of products. It pigments easily and offers an excellent resistance to u.v. Rays and hydrolysis.

Typical applications Shells for mooring or marker buoys shell for deepwater and dredging float. Characteristics Samples of material obtained from products similar or to those that are under are subject to following tests:

Rotationally moulded polyethylene Test method Min values required A Unit
Tensile strength UNI EN ISO 527-1
UNI EN ISO 527-2
7 N/mm2
Hardness DIN 53505 50 Shore D
Elongation at break UNI EN ISO 527-1 UNI EN ISO 527-2 55 %
Abrasion resistance Din 53516 Max 50 mm3