Cracking tubes
The tubular cracking furnace is the main technology of ethylene production today. The cracking tube is used in the radiation section, also known as the radiation section furnace tube. The cracking tube is arranged in the radiation chamber, and a certain number of burners are installed on the side wall, top or bottom of the radiation chamber. The operating temperature of the tube is 1000 ℃ - 1150 ℃, which is an important equipment of ethylene cracking furnace. The parts of the radiant section of ethylene cracking furnace mainly include centrifugally cast pipes, centrifugally cast pipe bends, statically cast pipe fittings, forgings and other parts. The conversion tube and ethylene cracking tube are formed by metal centrifugal casting process, boring the inner hole, machining the welding groove on the lathe, and assembling and welding.
Our production and technical team has nearly 30 years of experience in the industry, and is capable of producing one ethylene cracking furnace tube with an annual output of 1 million tons every month. To manufacture these parts, we strictly follow the following international standards for centrifugal casting and static casting:
Centrifugal casting: HG/T 2601, ASTM A608, DIN 10295, JIS G5122
Static casting: HG/T 3673, ASTM A351
The material grades are strictly in accordance with the standards of customers in different countries. The commonly used material grades are:
ZG40Cr25Ni35Nb, ZG40Cr35Ni45Nb, HP Nb, HT50, GX40NiCrSiNb35-26, GX40NiCrNb45-35, SCH24XNb, etc
Supply specification of centrifugal casting pipe:
Cracking furnace tube: outer diameter 50mm-200mm, wall thickness 5mm-20mm;
Gas collector: outer diameter 100mm-400mm, wall thickness 10mm-40mm;
Static casting supply specification:
90 ° elbow, 180 ° elbow, tee pipe, palm pipe, special-shaped three-dimensional elbow, hanger, etc.