Hot-dip galvanized (galvanizing), also known as hot-dip galvanized, it is an effective anti-corrosion of the metal, mainly used in various sectors of the metal structure facilities. The rust steel immersed in liquid zinc melt around 500 ℃, steel members attached to the surface of the zinc layer, which play the purpose of anti-corrosion. Hot-dip galvanizing process: finished of Pickling - washing - plus help the bath - drying - hanging plating - cooling - Pharmaceutical - cleaning - polishing - completion of the hot-dip galvanizing, hot dip galvanized by the ancient method of hot-dipped development come since 1836, France had been used in industrial hot dip galvanized, has a history of 140 years. However, the hot-dip galvanizing industry the past three decades along with the rapid development and large-scale development of the cold-rolled steel strip.

With the discovery of the industrial, hot dip galvanized products have been applied to many areas, hot-dip galvanized advantage of the anti-corrosion service life for a long time, to adapt to the the antiseptic treatment method widely been very popular. Been widely used in power tower, communication tower, railway, road protection, light poles, marine components, construction steel structure components, substation ancillary facilities, light industry.

Principle: hot dip galvanized iron pieces cleaned, and then the solvent treatment, drying after immersion in liquid zinc, iron, and the reaction of molten zinc alloyed zinc layer, its processes: the skim - washing - pickling - the fluxing - drying - hot-dip galvanized - separation - cooling passivation.

Galvanizing alloy layer mainly depends on the thickness of the silicon content of the steel chemical composition, the rough degree of the size of the cross-sectional area of the steel surface of the steel, the temperature of the zinc pot, the zinc immersion time, the cooling speed, and the cold deformation.

Hot-galvanized advantages,

1, low-cost processing: hot-dip galvanized anti-rust lower cost than the cost of other paint coating;

2, Durable: standard hot dip galvanized rust thickness can be kept for 50 years or more in the rural environment, without having to patch; standard hot dip galvanized rust layer can be maintained for 20 years in the urban areas or offshore area, without having to patch;

3, good reliability: galvanized layer with steel is metallurgically bonded to become a part of the surface of the steel, and therefore more reliable coating persistent;

4, the toughness of the coating: zinc coating to form a special metallurgical structure, this structure can withstand transportation and use of mechanical damage;

5, full protective: plated parts each part can be plated with zinc, even in the recesses, sharp corners and hiding places can be fully protected;

6, saving time and effort: the the galvanizing process faster than other coating construction method, and can avoid the the brushing time required on site after installation.

Fluid pipe is a hollow cross-section. From start to finish no welds. Steel hollow section. Many pipe oil, gas, gas, water pipes used for the conveyance of fluid conveyance and some solid materials, and the like. And other steel and solid steel bar match. Torsional strength in bending phase together. Weight. It is an economic cross-section steel. Widely used in the production planning parts and mechanical parts. Such as drill pipe, automotive drive shafts, bicycle frames and roof construction using steel scaffolding. Production of parts with steel ring. May be advanced material utilization. Simplified production process. Saving material and machining time. Such as bearing rings, jack sets. It was already widely used to make steel production. Pipe is still a variety of conventional weapons indispensable material. Gun barrels would have to steel to produce. By cross-section shape of the pipe is not the same can be divided into tube and shaped tubes. Because in the perimeter of equal conditions. The maximum area of a circle. Circular tube can carry more fluid. In addition, the circular cross section to withstand internal or external radial pressure. The force is uniform. Thus, the vast majority of pipe is pipe.

Production production methods:

1. General boiler tubes using a temperature below 450 ℃. Domestic primary tube 10, on the 20th of carbon structural steel hot-rolled or cold-drawn pipe tube production.

2. The high-pressure boiler tubes are often in high temperature high pressure conditions, the use of paper. The role of high temperature gas and steam pipes under. Oxidation and corrosion will occur. We need durable steel with high strength. High resistance to oxidation corrosion function. And have excellent organizational stability.

Hollow section of the fluid tube use:

1. General boiler tube is mainly used to produce water wall tube, boiling water pipe, superheated steam pipe, superheated steam locomotive boiler tubes, and large and small smoke pipe and brick arch tubes.

2. The high-pressure boiler tube is mainly used to produce high pressure and ultra-high pressure boiler superheater tubes, reheater tubes, windpipe, the main steam pipe.

However, the tube also has some limitations. Under conditions such as by plane bending. Tube as good as square, rectangular tube large flexural strength. Some farm machinery skeleton, steel and wood furniture on the popular square, rectangular tube.

Gate Scaffolding is used in construction scaffolding, one of the most widely used scaffolding. Since the main frame was "door" type, so called door or door-type scaffolding, also known as scaffolding or gantry. This scaffold consists of main frame, horizontal frame cross bracing, scaffold boards, adjustable base and other components.

Scaffolding fastener having removable flexible, convenient transport, versatility and so on. Therefore, in our country it is widely used in the scaffolding, which accounts for more than 60% use, most current usage, the most common type of scaffold. However, this scaffold security assurances poor construction efficiency is low, can not meet the need for capital works development.

Gate Scaffolding is not a long time in our production and use of various research units developed scaffolding, self-contained, and do not GM, variety of different specifications. Some manufacturers copying foreign products, using inch sizes. Gate Scaffolding far there is no unified design and product standards, product specifications of each plant is different, inconsistent quality. Not only caused great difficulties to the construction units to use and manage, is not conducive to the promotion of applications. But also to the construction safety and security. Therefore, we should organize the preparation and issuance of Gate Scaffolding uniform standards as soon as possible. Gate Scaffolding in standardization, the main problems are:

1. Scaffolding Part name inconsistency

Call domestic plants gantry scaffolding major components inconsistent. Each have a name, to promote the use of scaffolding great inconvenience.

2. The main components Size range

Gate Scaffolding world standard size range, there are two kinds of international units and imperial units of measurement. As the width of the 1219-type gantry imperial units for the 4 '(1219mm), height of 6'4 "(1930mm), width 1219 international units of type mast is 1200 mm, height 1900 mm. Each scaffolding foreign companies mast main 900,914,1200,1219 mm width of four, mast height of many sizes, self-contained set system.

Several manufacturers of the product specification is far from uniform, imitation foreign product specifications, there are also domestic research institutes to design a system, there is the use of inch sizes, there is also an international system of units dimensions. Inch dimensions such as the width of the door frame is 1219mm, the International System of Units is 1200mm, and 1829mm respectively from the frame 1830mm ,, Because these different dimensions, so can not interoperability between the door frame. Another example is the mast height and size have more than eight, the gap size between the connecting pins are also a variety, resulting in a lot of cross-bracing of varieties.

3. Scaffolding used different pipe cross-sectional dimension

Foreign-door-type scaffolding steel material dimensions and materials have special requirements. Japanese standards such as the door scaffold pole with the main components made of steel STK-51 number, size 42.7 × 2.5mm, the auxiliary lever and the materials for the STK-41 gauge steel, the size of? 34.2 × 2.3mm and 27.2 × 2.0 mm. for a door of no special steel scaffolding, research units required by the design pipe size and custom size often does not arrive, so that some manufacturers were forced to use a large wall thickness water gas pipes. Such pipe diameter and wall thickness used in the plant is not uniform, so that even a consistent mast dimensions, due to the different cross-sectional dimensions of the steel pipe, the plant's mast is still not universal. In addition, the use of thick-walled steel pipe, so that the amount of steel door scaffold increases.

Hot galvanized steel pipe galvanized and galvanized two kinds. A wet dry, hot galvanized zinc oxidation and reduction etc..

The main difference between the different hot galvanizing method in cleaning steel after acid leaching, improve the surface quality of galvanized pipe with what method of activation. The production is mainly used in dry and oxidation reduction method.

The surface of the zinc layer is galvanized smooth and dense and uniform microstructure; has good mechanical properties and corrosion resistance of zinc galvanized low specific heat consumption; 60% ~ 75%. Zinc has a certain complexity in technology, but the single coating, surface coating and double-sided plating of different thickness, and the thin-wall pipe galvanized should adopt this method.

If you’re buying an old house, beware of old water pipes; specifically, galvanized steel.These pipes build up with sediment on the inside, making the inside diameter of the pipe smaller and smaller over time, eventually to the point where water flow is unusable.These pipes also corrode at the joints, which can lead to leaks.

The water supply piping is what brings water from the street to the house.To identify the type of material, take a look at the water piping where it comes into the basement before the first shutoff valve, which should be located right before the water meter.If this water piping has a threaded fitting, it’s probably a galvanized supply pipe.This is always bad news.The other types of water supply pipes are copper, plastic, and lead.Copper and plastic are good news, lead is not.

If you see a thicker pipe coming up out of the basement floor with threads on the end, it’s probably a galvanizedsupply pipe. The mere presence of galvanized pipes doesn’t constitute an immediate action item, but it does mean that the water distribution pipes in the house should be looked at and tested more thoroughly during the home inspection, especially if there is any evidence of past leaks.

We often say that the galvanized pipe, galvanized pipe use now gas, heating with the kind of iron pipe is galvanized pipe, galvanized pipe as the pipe, use a few years later, the tube produces a lot of rust, yellow water outflow ware not only pollution, but not mixed with smooth walls breeding of bacteria, heavy metals in the water caused by excessive corrosion, serious harm to human health.

Galvanized pipe is to make the molten metal and the body reaction, iron-based alloy layer, so that the substrate and coating combination of both. Hot dip galvanized steel pickling is the first, in order to remove the steel surface of iron oxide, pickling, the aqueous solution by ammonium chloride or zinc chloride or ammonium chloride and zinc chloride mixed solution tank cleaning, and then send into the hot-dip plating bath. Hot-dip galvanized with coating uniformity, adhesion, and long life. Hot dip galvanized steel substrate occurs with molten bath complex physical, chemical anti-galvanized steel pipe should form a corrosion-resistant structure of zinc-iron alloy layer close. Alloy layer and the layer of pure zinc, steel base blend. Therefore, its corrosion resistance ability.

Galvanized steel pipe is molten metal and reacting the iron matrix alloy layer, so that the substrate and coating combination of both.

Galvanized steel pipe into cold galvanized steel, hot dip galvanized steel pipe, cold galvanized steel pipe has been disabled, which is also able to use a temporary state advocates. Sixties and seventies, the international developed countries began to develop new pipe, and gradually disable galvanized pipe. Chinese Ministry of Construction and other four ministries issued a document clearly disabled from 2000 onwards galvanized pipe as the water pipes, the new district of the cold water pipe has been rarely used galvanized pipe, some residential hot water pipes using galvanized pipe. Hot dip galvanized steel in the fire, electricity and highways have a wide range of applications.

Hot dip galvanized steel pipe is widely used in construction, machinery, coal, chemical, railway vehicles, the automotive industry, roads, bridges, container, sports facilities, agricultural machinery, oil machinery, mining machinery and other manufacturing industries.

Galvanized steel pipe surface or hot-dip galvanized layer of welded steel pipe. Galvanized steel pipe to increase corrosion resistance and prolong life. Galvanized pipe is widely used, except for water, gas, oil, general low pressure fluid line pipe is also used as an oil heater oil industry, particularly the marine oil field oil well pipes, pipelines, chemical coking equipment, condensing cooler, coal washing oil distillate exchange used pipe and trestle pipe pile, mine tunnel support frame pipe.

TianJin XinYue Steel Group ,located in Daqiuzhuang Industrial Area,Tianjin,China, is one of the most famous enterprise of steel pipe in China. Xinyue set up several production bases in Tianjin & Hebei Province, manufacturing ERW Steel Pipe, SSAW Steel Pipe, LSAW Steel Pipe, SMLS Steel Pipe, Scaffolding system and couplers.

The main product: SSAW API 5L Line Pipe,3PE Coated API Pipe,Gas Line Pipe,SSAW Line Pipe,2PE Coated API Pipe,AWWA C200 Line Pipe and so on. more product.

Our sales market is spreading all over the world, such as Southeast Asia, Mid-east, Europe, South America, Africa and so on, obtaining a good reputation among customers.

Galvanized steel pipe can not be welded connections. Because the pipe can not go to secondary galvanized, there is no way to do the inside weld corrosion treatment (except to enter people). Now starting from the design, usually greater than or equal DN100 pipe with clamp connections, less than DN100 can be used to connect the wire connection. If the design is not recommended to write the changes.

From the normative interpretation point of view, the purpose is to use galvanized pipe corrosion, galvanized pipe and welded connections so inherently contradictory.

From the actual situation, if the pipe is usually water at room temperature and is then filled with water, the inner weld corrosion usually not very serious. However, if no water or hot water, corrosion or not more serious first 150 sets of wire.

First set of filaments 150 can not. If it must be galvanized pipe buried, it would trench, pipeline and trench sites (especially the bolts) to strengthen the anti-corrosion, although the water supply and drainage and fire the acceptance of some description is not the same situation, but this can be considered a compromise approach the

Acceptance is so describe:

GB50242-2002. 9.2.3 pipeline flange interfaces, clasps, clamps, etc. should be installed in manholes or a trench, not buried in the soil

GB50261-96 Section 5.1.4A: buried pipeline connecting the pump room should adopt flexible couplings, grooved buried pipe joint bolts, nuts should be done preservative

Galvanized steel pipe is better. Wear flat galvanized steel pipe plant Zhuang Teng hold off coupons platinum sly fire pipeline is used more widely.

Coated steel pipe galvanized steel pipe is a new fire after. Now the national standard GB / T5135.20-2010 sprinkler systems Part 20: coated steel pipe. Also made clear that the fire should be used in coated steel. National standards set forth in the fire to use coated steel. It has been clear coated steel pipe and galvanized steel pipe performance is certainly not a hierarchy.

Second, the price is based on coated steel on steel. Inside and outside wall coating. Forming a protective layer. That is not to protect the pipeline from corrosion. Letting pipeline without fouling, clogging. So the price of galvanized coated steel is certainly better than some of the high steel.