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Политика за квалитет
Управување со квалитет
во процесот на производство на профили, цевки, арматурна мрежа и статични носачи за ферт греди
Quality is our trademark
Production is done with most modern technologies
Creating the conditions and develop creativity and promote teamwork of the employees in a friendly conditions that contributes to achieving greater business success.
Constantly raising the level of knowledge and skills of our staff through internal training everyday and visit international fairs and seminars.
With the highest quality raw materials from suppliers (foreign countries) who already demonstrated their professionalism.
Raw material
Electrowelded tubes and profiles are made of universal construction steel with S 235 JRG 2, S 275 JR and S235J2G3 quality, with regular hemical compositions and define mexanic-tehnikal characteristics.
| QUALITY STANDARS | |
|---|---|
| EN 10025 | DIN 17100 |
| TYPE OF STEEL | |
| S 235 JRG2 | R St 37-2 |
| S 235 JO | St37-3 U |
| S 235 J2G3 | St 37-3 N |
| S 275 JR | St 44-2 |
| S 275 Jo | St 44-3 U |
| S 275 J2G3 | St 44-3 N |
| S 335 JR | - |
| S335 JO | St 52-3 U |
| S 355 J2G3 | St 52-3 N |
Allowed tolerance
1.Weight
Tubes and profiles weight, can variate of the weight that is given in the tables, in margine beatween +10% and -8%, and it is calculated according the specific steel weight of 7,85 kg/dm3.
2.Form
Allowed tolerance for the straight, right angle, hollowness, and modulation is given in the table:
| CHARACTERISTIC | ALLOWED TOLERANCE | |
|---|---|---|
| Tubes with rounded section | Tubes with square or rectangular section | |
| Outside rate | ±1% of outside diametar but not least than ±0,5 мм | ±1% of the mesured sides but not least than ±0,5 мм |
| Wall thickness | ±10% with least ±0,2мм outside the welded place and angle of roundness | |
| Right angle | - | 90° ±1° |
| Camber or hollownes | - | ±1% of sides lenght |
| Outside angle of roundness | - | most 3a (a=wall thickness) |
| Straight | 0,2% of total tubes lenght | |
| Modulation | - | 2mm for the first 1000mm, + 0,5mm for every next 1000mm lenght |