The galvanized square tube is divided into a hot-dip galvanized square tube and a cold-galvanized square tube from the production process. It is precisely because of the difference in the addition of these two galvanized square tubes that they have many different physical and chemical properties. In general they have many differences in strength, toughness and mechanical properties.
Hot-dip galvanized square tube
Hot-dip galvanized square tube: is a square tube welded after the steel plate or the steel strip is crimped, and the square tube is placed in the hot-dip galvanizing bath on the basis of the square tube. a square tube. The production process of hot-dip galvanized square tubes is relatively simple, and the production efficiency is very high, and there are many varieties and specifications. The equipment and funds required for such square tubes are few and suitable for the production of small galvanized square tube manufacturers. But in terms of strength, the strength of this steel tube is much lower than that of a seamless square tube.
Cold galvanized square tube
The cold-galvanized square tube uses the principle of cold-galvanizing on the square tube used to make the square tube have anti-corrosion properties. Different from hot-dip galvanizing, cold-galvanized coatings are mainly anti-corrosion by electrochemical principle. Therefore, it is necessary to ensure sufficient contact between the zinc powder and the steel to produce an electrode potential difference, so the surface treatment of the steel is very important.
The difference between cold and hot galvanized square tubes
Galvanized square tubes are available in two categories: hot-dip galvanized square tubes and galvanized square tubes. The hot-dip galvanized square tube has a wet method, a dry method, a lead-zinc method, a redox method, and the like. The main difference between different hot-dip galvanizing methods is how to activate the surface of the pipe to improve the galvanizing quality after the acid pipe is cleaned. The dry process and redox process are mainly used in production, and their characteristics are shown in the table. The zinc-plated zinc layer has a very smooth and compact surface and uniform structure; it has good mechanical properties and corrosion resistance; zinc consumption is 60% to 75% lower than that of hot-dip galvanizing. Electro-galvanizing has certain technical complexity, but it must be applied to single-sided coatings, double-sided coatings with different thicknesses on the inner and outer surfaces, and thin-walled tubes.
Door Accessories
Door accessories include Automatic Door Kits , High Speed Door Motor And Control Box, High Speed Door Accessories, Other Door Accessories. We can sell any parts of these accessories.
Automatic door kits: Our automatic door kits include 1 motor+gear reducer, 1 belt,7 meter, 1 idle pulley, Microprocessor, 4 sets of carriage blue wheels, 2 sets of floor guides,2pcs remote control, 2 sets belt clamp mounting brackets, 1 power supply harness and cable connectors, 2 locator, Aluminum track whose length is 2.08 meter, 3 meter, or 4 meter. We are a manufacturer of automatic door openers that are designed to provide people convenience. Automatic Door Systems` drive to provide that level of service is but one of the reasons why automatic doors are becoming more and more popular. Our Automatic Sliding Door systems are modern, space-saving and elegant. Automatic sliding doors have many basic functions some of which include: automatic mode with full opening width and/or reduced opening width, and exit only for traffic control. The opening of automatic doors can also be adjustable to make the opening width smaller or larger. Important safety functions such as safety sensors prevent the door from shutting if persons or objects are in the detection zone. If the door leaves are inhibited when closing, they are immediately re-opened or if the door leaves are hindered when opening, they are immediately stopped by a safety automatic reversing mechanism.
High Speed Door motor and control box: Our company have German SEW Motor, Japan Mitsubishi Controller. Our own brand Hofic servo motor and controller. Chinese famous brand SEJ motor and Holip controller. German SEW Motor and Japan Mitsubishi Controller: It is easy to find the ideal energy-efficient motor for your application at SEW. Our rolling gate servo control system is suitable for high speed and high usage soft and hard rolling gate. The whole system is in a small and light package, it has high torque and high operating speed, lower noise, high reliability, smooth and soft operating curves, it`s suitable for high speed and usage environment. SEJ motor and Holip controller: Three-phase asynchronous motor with magnetic brake has broad uses, It is suitable for various mechanical main drive and auxiliary drive, and it is also used for various required rapid stopping and correct positioning.
high speed door accessories: Driving system: High speed door Servo System motor and control, motor SNMA / SEJ +reducer+flang+encoder+control box. Other accessories: Middle aluminium bar, bottom aluminium bar, aluminium vertical track, stainless steel vertical track, brushes,round nylon strip, PVC roll, rolling steel tube complete, drum be;;s for rolling tube, side end covers, stainless steel cover, steel tubes, air bag sensor system, safety light beam, Microwave sensor 24 Gigahertz,PVC welding machine, smoke and fire sensors, PVC transparent window, magnetic loop, photocell, remote control, manual push button, sound warning alarm Led lamp traffic light.
Other door accessories: Sectional door accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
For accessories detail information, please kindly check our detail classify.
Door Accessories,Automatic Door Kits,High Speed Door Accessories,Sliding Door Operator
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfrollershutterdoor.com