Pipes Chimney are (usually black pipes) seamless pipes made of steel designed to function in boiler installations and installations with high temperatures. Boiler smoke pipes and chimney pipes made from heat resistant carbon and low-alloy steel, which withstand high pressure and temperature load. Exhaust pipes are used for parts of the termal energy heating devices such as boilers, fireplaces, kitchen stoves, chimney connections. Additional elements of the exhaust pipes are single-wall liners and wall rosette. Special joint solutions like adjustable knee (multi-segment pipe with a wide range of adjustable angle with optional revision window) and elbow chimney pipe allow to join several straight pipes and expand the flue vent system.