Static Casted Twisted Tube for Petrochemical

• Certification: CE
• Application: Heater
• Principle: Recuperative Heat Exchanger
• Style: Steel Type
• Material: Stainless Steel
• Transport Package: Wooden Case
• Model NO.: HX62242629
• Specification: Customized
• Trademark: HEXIN
• Origin: China
• HS Code: 85149090
• Production Capacity: 5000 Pieces/Year

Product Description

It is suitable for the transformation of heat transfer and energy-saving technologies such as ethylene cracking furnaces, various oil refining tube furnaces and high pressure boilers. 
According to the Prandtl's boundary layer theory, when the fluid flows in the furnace tube of the radiant section of the cracking furnace, there are flow boundary layers and temperature boundary layers near the tube wall. The thermal resistance of the boundary layer is large, and the heat transfer efficiency of the cracking furnace tube is significantly reduced. At the same time, due to the existence of the boundary layer, the coking rate of the furnace tube increases and the operation period of the cracking furnace is shortened.
After the twisted sheet tube section is installed in the furnace tube of the radiant section of the cracking furnace, the flow form of the fluid in the tube changes from a plug flow to a swirling flow, which forms a strong scouring effect on the inner wall of the furnace tube, greatly reduces the thickness of the boundary layer, and increases the furnace tube in the radiant section. The overall heat transfer coefficient reduces the temperature of the furnace tube wall, reduces the coking rate, prolongs the operation period of the cracking furnace, and reduces the energy consumption.
2.3. Technical indicators
(1) The temperature of the furnace tube wall in the radiation section of the cracking furnace drops by more than 20 °C;
(2) The cracking furnace cycle is extended by more than 50%;
(3) Fuel consumption decreased by about 0.5%. 
4. Technical features
(1) Strengthen the heat transfer, and increase the heat transfer efficiency of the furnace tube by 30%;
(2) Reduce the thermal stress by more than 60%, improve the stability of the twisted sheet tube at high temperature, and prolong the service life of the furnace tube;
(3) Reduce the coking rate and reduce the probability of furnace tube blockage caused by coke layer falling off.
 

Item	Static Casted Twisted Tube for Petrochemical
Process	Centrifugal/spun casting method for tube sections, investment casting for the elbows or bends ,hangers, welding and machining.
Shapes	U-type, W-Type, 0-Type, P-type, L-Type,S-Type, Straight-type, Electric radiant tubes.
Material	High Nickel and high Chrome heat resistant alloys, Cobalt base alloys, like. HU,HT,HK,HP,HW,24/24NbTiZr,50Cr/50Ni(2.4813),1.4865,1.4849,1.4848,1.4410,1.4059, 1.4841, 1.4845,1.4852, 2.4879 or as per customer's requirements
Application	The radiant tubes are  working at high temperature environment  on average: 800-1200ºC, most of them are  used for indirect heating to furnace  like  CAL(continuous annealing line) CGL,(Conginious galvanizing line).
Specifications	Outer diameter: 55mm-580mm Thickness: 5mm,6mm,7mm or customized Length: as per your request
Test	Chemical analysis by spectrometer for each heat,eddy current test,pressure test ,thickness test , PT 100%(liquid penetrant test),VI(visual inspect)100%,dimensional check.
Products	U radiant tubes W radiant tubes Straight radiant tubes Electricity radiant tubes Special radiant tubes

About us

Qingdao Hexin Machinery Co., Ltd. is professional for manufacturing, sale and research of high temperature alloy centrifugal cast tube, Heat resistant steel precision castings and sand mold casting.
The main products are: Ethylene cracking furnace furnace tube, reformer furnace tube, all kinds of casting alloy elbow, casting tube sheet, hook, hanger, bracket and other heat resistant casting products. Furnace rollers, radiant tubes, sink roll, stabilizing roll, support arm and sleeve and other heat resistant alloy used for continuous galvanizing line(continuous annealing line), all kinds of heat treatment fixtures used for heating processing equipment, like tray, basket, fan and so on. Widely used for famous brand heat treatment equipment, such as IPSEN, AICHELIN, FONTON, etc.
We committed to the strict quality control and strictly implement ISO9000 series quality management system, Ensure the castings in each process of each station "zero defect" production, Quality has won the acceptance of customers at home and abroad.
Welcome to view our website: hexinmachineryqd.en.made-in-china.com