Product Characteristics T ubing is manufactured of PVCcoated woven or knitted fabric designed to ensure excellent tube function under severe conditions T emperature range is 30 to 70 degrees Celsius This is the temperature range normally encountered in installations and the tubing will give reliable performance within this range PVC woven fabric will grow stif f at lower temperatures Care should be taken in installations where the temperature drops below 30 degrees Celsius to avoid subjecting the tubing to sudden bends or contact with sharp objects Provided these precautions are taken the tubing will continue to function reliably at lower temperatures The high strength rating see technical data of the fabric enables the tube to withstand shock waves generated by blasting several types of overloading and mechanical action within reasonable limits V ehicle exhaust and blasting fumes will not af fect the tubing in normal conditions The tubing is manufactured of synthetic woven fabric coated on both sides with PVC and dirt will not accumulate This is in contrast to fabric coated with PVC on one side only where dirt and dust tend to stick on the uncoated side The tubing is not sensitive to microorganisms normally associated with rot and mildew in the layer of dirt deposited in the tube The PVC coating is insusceptible to corrosion and similar attack The material is flame retardant conforming to CANCSAM427 M91 Certificate 1 181 The durability of PVC fabric has been confirmed by the experience of many years of installation T ubing is manufactured in highfrequency welding machines The ability of the material to lend itself to welding is of crucial importance in ensuring a strong weld The material and the welding method used give a welded joint virtually as strong as the material itself The manufacturer needs to possess special skills and experience to control the additives in the coating so as to counteract the aging process in plastic fabric ROCVENT INC MINE TUNNEL VENTILATION 9 wwwrocventcom