Quality control at the enterprise is carried out in a laboratory having a certified technical expertise, where incoming control of raw materials is carried out in specific areas as follows:
- quality control of fiber, yarn and thread;
- quality control of grey and finished fabrics;
- quality control of accessories.
X-ray testing is one of the most important methods of nondestructive testing (NDT) and technical diagnostics (TD) of sintered ceramic plates at the enterprise.
X-ray testing for evaluation of quality of sintered plates is used for detection of cavities, cracks, voids, slag blow-holes and other discontinuities in sintered materials.
The X-Ray-TV unit operation is controlled by an operator through a personal computer. The software of the unit allows a long-term storage of 20,000 images, and has extensive image processing capabilities: contrasting, positive/negative processing, image scaling.
Conversion system can operate in a live video mode. Support of any peripherals, printers, backing storages is provided. X-ray testing results for each plate can be provided both in hard-copies and in soft copies.
The operating principle of X-ray testing is based on X-ray absorption which depends on the density of the medium and on atomic number of elements composing the material of the medium.
LABORATORY FOR FRAGMENTATION RESISTANCE TESTING OF ACCESSORIES AND FINISHED
PRODUCTS ACCORDING TO STANAG 2920 NATO STANDARD
The laboratory is a closed room equipped with up-to- date measuring and testing climate control equipment.
The tests are conducted under procedure set forth in STANAG 2920 NATO standard with assessment of fragmentation resistance based on V50 value (the velocity at which the probability of protective package penetration is 0.5). The higher the V50 value, the higher the rating of a protective package or a ballistic material.
The V50 velocity is the average of the velocities recorded for six fair impacts consisting of the three lowest velocities for penetration and the three highest velocities for nonpenetration.
FSPs (Fragment Simulating Projectiles) having a mass of 1.1 g are used as a damaging agent.
In actual practice, STANAG 2920 is applied not only by NATO Member Nations, but by all leading countries of the world.