Wooden Poles are mostly manufactured for Yemen, Libya, Kenya, Ghana and Uganda Markets according to European Standards.
In order to obtain quality, regular poles, the bark, bast and any bigger protrusions must immediately be removed by machine. After that, poles are machined to the measures prescribed by the standard SRPS D.B2.020 and the specific standards of power supply industry GSE 41/81 i GSE 55/86. Those which do not satisfy the criteria are rejected. Treated wooden poles are stored on a vast, flat, firm, asphalt-covered yard in order to enable proper and slow drying and prevent the occurrence of any wood deformations.
Impregnation of Poles
Poles are impregnated with creosote oil and CB preservatives, depending on end user’s requirements. Impregnation with creosote oil WEI type C (EN 13991 quality C), produced by RÜTGERS, Germany is carried out according to the standards SRPS D.T4.022 and DIN 68811.
Daily impregnation records are kept, where all relevant data and values defined by the standard are entered. The impregnation process is controlled and registered by a registering device. In addition, batch number, date, quantity and signature of authorized controlling person are entered into a graph.
After the completed impregnation process, test specimen are drilled out to determine the penetration depth of impregnating agent. Poles are weighed after impregnation, and the difference in weight shows the exact amount of oil absorption per batch, so we obtain the average weight per m³. Each impregnated pole is marked with nails with imprinted pole length, producer’s logo and the year of impregnation.
Impregnation with CB preservatives is carried out according to the strandard SRPS D.T4.025. The impregnating agent (salt mixture) has been tested by authorized certifying bodies, and we possess the certificates and technical instructions issued by them. Before the impregnation process, we determine the concentration of solution which will be used, depening on the type of wood, dimensions and the process.The process is controlled by means of daily impregnation records and graph, which are signed by authorized person on completion of the impregnation process. Each pole impregnated with CB preservatives is marked with nails with imprinted pole length, producer’s logo and the year of impregnation.
We produce and impregnate wooden poles for the requirements of telecommunication and power supply network. They are produced from winter-felled pine and black pine, spruce, fir, larch, chestnut, oak and black locust logs. Impregnation is carried out with creosote oil WEI type C and CB preservatives, depending on end user’s requirements.
Sleepers for Narrow and Wide-Gauge Railways
Sleepers are air seasoned in stacks according to the standard SRPS D.T4.020. Before impregnation, the quality control of sleepers is performed on the planing machine in order to check fulfillment of the required standards. In this phase, the degree of dryness is also determined.
Impregnation is carried out with creosote oil WEI type C (EN 13991 quality C), produced by RÜTGERS Basic Aromatics GmbH, Germany. We use single, double and improved double Rüping method. The impregnation of beech sleepers is carried out according to the following standards: SRPS D.T4.062 and SRPS D.T4.063 and DIN 68811, and for oak sleepers: SRPS D. T4.061.
The sleepers which are ready for impregnation are stacked on wagons, which are weighed and the exact amount of oil absorption per sleeper is calculated based on the volumetric mass before and after impregnation.
Impregnation records are kept, where all relevant data defined by the standard are entered. The impregnation process is controlled and registered by a device, which registers pressure, vacuum and temperature. In addition, batch number, date, quantity and signature of authorized controlling person are entered into a graph.
Quality check-up is carried out after the completed impregnation process by using Pressler drill to drill out test specimen to determine the penetration depth of impregnating agent. Impregnated sleepers are marked with numerators with imprinted year of impregnation.
Impregnation is a method of chemical wood preservation, where protective agents – creosote oil or inorganic salt solution – are introduced into wood under pressure in a vacuum. This process, which is carried out in autoclaves, increases wood strength and resistance to water, moisture, heat and chemicals. Before impregnation, wood is stacked and dried for 6 to 8 months in order to maximally reduce the percentage of moisture before chemical protection.
A special importance is given to ecological aspect of the production. Impregnation is carried out with eco-friendly agents of the last generation (creosote oil WEI type C, which is imported from Germany, and inorganic salt solutions). We give a guarantee for our products for a period of 15 to 20 years, although in reality their useful life is much longer.