Portable Welding Screen PWS


Development of ‘the National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”

Designed to protect workers from ultraviolet radiation (UV) generated during electric arc welding in non-stationary workplaces.

During electric arc welding, the UV intensity often exceeds the maximum allowable norms at a distance of up to fifty meters from the welding site. Auxiliary workers near the welder, as well as random people, who are at a dangerous distance from non-stationary electric arc welding workplaces, may be exposed to radiation. The most common non-stationary welding places, where arc welding is performed in the open air and near which unprotected people may be, include: construction sites, places of emergency and repair work, places of use of welding for domestic purposes, etc.
The developed Portable Welding Screen PWS consists of two sliding racks which can be adjusted on height by means of plugs, and crossbeam with hooks to which the special screen light filter rolled up in a roll on a metal core clings.

Fig.1. Layout of the PWS prototype

At the bottom of the racks are 4 hooks, which allow placing a roll with a screen at a height of 0.1 to 0.4 meters for ventilation, depending on the possible place of welding. By means of plugs the core of a roll is reliably fixed on a hook that gives additional rigidity to all design. If necessary, it is possible to attach different legs to the racks. So, fastening of legs like “arrow” gives the chance to have some PWS at an angle of 90 ° (fig.). That provides a dense protection of a place of carrying out welding works.

Fig.2. Example of placement of PWS at an angle of 90 °

Screenflex PVC film with the following technical characteristics is used as a protective screen-light filter PWS (table).

PVC film has a red color, which signals a possible danger. This material best transmits light in the visible range in the thermal area, which allows you to safely observe the welding work, monitor compliance with occupational safety requirements, control the progress of the work process. The screen almost does not block infrared radiation, which does not contribute to the greenhouse effect, and provides comfortable working conditions.

Technical characteristics of Screenflex protective film

Properties Standart Unit of measurement Quality Description






Ultraviolet and infrared light filter EN 1598 - EN 1598 Filtration power of welding arc radiation, which allows to use the material as a protective screen
Fire resistance - Standard classification of refractory properties and resistance to ignition of the material






UVB resistance - Property to resist UVB welding arc
Soundproofing DIN 52210 dB >35 The average sound pressure level (frequency 0.1–3.2 kHz), which is reduced by a curtain with an area of 1.76 m2 and a thickness of 5 mm
Shore hardness EN ISO 868 Sh A 80 Scale from 0 (soft) to 100 (hard)
Tear resistance DIN 53515 N/mm 55 A measure of the force required to break a cracked specimen
Resistance to rupture ASTM N/mm2


18 Maximum force that can withstand the material to rupture
Stretching the gap D 638 % 300 Maximum stretching of the material before rupture
Stretching after rupture EN ISO 527


% 62 Stretching that occurs after the rupture of the material at the point of stretching
Thermal conductivity ASTM C 177 W/m.K 0.16 The lower this value, the more insulating the material
Cold burst temperature ISO 8570 ˚C -25 The temperature at which the twisted material ruptures. The point of fragility.
Temperature of use EN 1876 ˚C from -15 to +50 Temperature range in which the material retains its mechanical properties (flexibility)
Heat capacity ISO 11357 kJ/kg.K 1.6 The energy required to raise the temperature of 1 kg of material by 1˚C
Surface resistance IEC 60093 Ω·cm 4·1013 The electrical resistance of the surface of the material, measured at a voltage of 500 V
Water absorption EN ISO 62 % -0.2 Change in the mass of the material after being in certain conditions
Density ASTM D 792 g/cm3 1.2–1.3 Mass per unit volume

The use of PWS provides the following advantages:

- compactness,

- ease of installation,

- ease of movement,

- the presence of settings for surface roughness,

- possibility of safe third-party supervision over the course of works.

Positive innovations also include the location of safety signs on the surface of the protective film.

You can follow any responses to this entry through the RSS feed. Both comments and pings are currently closed.

Коментування заборонено.