Glavanized Steel Pipe Manufacturing

Glavanized Steel Pipe Manufacturing


Galvanized pipe using sulfate electroplating of zinc-iron alloy technology, is the production line between the slot and slot are perforated without any solution out or overflow. The production process of the process consists of the circulatory system, the tank solution that acid-base liquid, electroplating solution, the light and passivation solution, only to not use the system to leak or discharge, the production line only 5 cleaning tank, Reuse of regular emissions, in particular, after the passivation is not washed without the production of waste water production process.

Hunan Shinestar Steel Research Institute

Hunan Shinestar Steel Research Institute

If Shinestar is a ship sailing in the sea, then the company management is the captain lead the direction. In 2016, Hunan Shinestar Steel Research Institute has been founded, which is the first independent institute been set by enterprise. It will provide technical support to Shinestar to promote our company to a new level.

Hunan Shinestar Steel Research Institute belongs to the Chinese steel industry regional industry organization, will strictly follow the party's policies to service steel industry and social, adhere to innovation and development, establish and perfect industry coordination and self-discipline Mechanism to safeguard the interests of the industry as a whole and the legitimate rights and interests of enterprises. Developing our role in the industry between enterprises, and continuously improve the competitiveness of China's steel industry in the international market and promote the healthy development of the steel industry.

The service scope of Hunan Shinestar Steel Research Institute including:

Firstly, according to the relevant state policies and regulations, combined with industry characteristics, make rules for industry regulations and establish industry self-regulatory mechanism, constantly regulate the industry behavior. Especially in the promotion of industrial restructuring, elimination of backwardness, promote technological progress, strengthen energy conservation and environmental protection, improve the quality of industry operation, etc. 

Secondly, carrying out industry research, participate in the development of industry development planning, industrial policies and regulations for the government and industry to strengthen macro-control and management , for policy support.

Thirdly, collecting, collating, grading release domestic and international steel industry market conditions and industry information. Monitoring the economic operation of the industry trend, to carry out special studies. Offering service to iron and steel enterprises in the management, development strategies and economic and technical indicators for analysis and evaluation.

Fourth, actively participate in the formulation, revision of the industry on technology, economy, management standards, norms, organizations to promote the implementation of member units to carry out inspection, assessment work.

Fifth, actively participate in the industry of major investment, transformation, development projects of the advanced nature, feasibility and feasibility of the early demonstration. Promote scientific and technological innovation, management innovation and product development, the development of common industry technology organizations and the promotion and application of scientific and technological achievements.

Sixth, organize sale's training, research and development trade skills, job evaluation standards and assessment, organize the steel industry vocational skills competitions, improve the professional and technical of staffs.

Seventh, actively carry out exchanges and cooperation with international organizations and overseas enterprises, keep in touch with international steel industry organizations, exchange information, negotiation, promote foreign economic and technological exchanges and cooperation, and organize companies to participate in international exhibitions.

Eighth, commissioned by the industry, according to the law to carry out the steel industry statistics, investigation, analysis and reporting and other jobs. Representation or coordination of anti-dumping, countervailing, safeguard measures related work, coordination of iron ore imports, coordination of iron and steel products import and export.

In the future, Hunan Shinestar Steel Research Institute will continue to enlarge the team, engage professors for consultancy, cooperate with domestic and foreign steel industry experts for management consulting, market research, management training, customer survey and competitor investigation. For all-round support for the wisdom of China's steel industry to contribute to the development. 

Technical Requirement of Galvanized Steel Pipe

Technical Requirement of Galvanized Steel Pipe

1, grades and chemical composition

Galvanized steel grades and chemical composition should be consistent with GB 3091 under the black tube steel grades and chemical composition.

2, the manufacturing method

The manufacturing method of the black tube (furnace welding or welding) is selected by the manufacturer. Galvanized by hot-dip galvanizing method.

3, thread and pipe joints

3.1 galvanized steel pipe with threaded delivery, the thread should be in galvanized after the car system. Threads shall comply with YB 822.

3.2 steel pipe joints should be consistent with the provisions of YB 238; malleable iron pipe fittings should be consistent with YB 230 requirements.

4, mechanical properties of galvanized steel pipe before the mechanical properties should be consistent with the provisions of GB 3091.

5, uniformity of galvanized galvanized steel pipe galvanized layer should be uniformity of the test. Steel pipe samples in copper sulfate solution for 5 consecutive impregnation shall not be red (copper color).

6, cold bending test Nominal diameter of not more than 50mm galvanized steel pipe should be cold bending test. Bending angle of 90 °, bending radius of 8 times the diameter. Test with no filler, the specimen weld should be placed in the bending direction of the outer or upper. After the test, the sample should not have cracks and zinc peeling off the same.

7, water pressure test Water pressure test should be carried out in the black, eddy current testing can also be used instead of water pressure test. Test pressure or eddy current inspection shall be in accordance with GB 3092 for the size of the reference sample.

In Stock ERW Steel Pipe Price 2016/12/20

In Stock ERW Steel Pipe Price 2016/12/20

Carbon Steel Pipe Production

Carbon steel pipe can be divided into seamless steel pipe, straight seam steel pipe, spiral steel pipe, high-frequency welded steel pipe. Rolled seamless carbon steel pipe is the raw material of round tube, tube embryo to be cut through the cutting machine into a length of about 1 m of blank, and the conveyor belt to the furnace heating. The billet is fed into a furnace and heated at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round tube billet to go through the pressure piercing machine to wear empty. Generally more common punching machine is conical roller piercing machine, this punching machine production efficiency is high, product quality is good, perforation expansion diameter large, can wear a variety of steel. After piercing, the round tube blank has been three-roll cross-rolling, rolling or extrusion. Squeeze after the tube diameter. Sizing machine through the high-speed rotation of the cone drill bit into the steel embryo drilling, the formation of steel pipe. The inner diameter of the pipe is determined by the outside diameter of the sizing bit. Steel pipe after sizing, into the cooling tower, through the water cooling, the cooling pipe, it is necessary to be straightened. After straightening by the steel pipe sent to the metal detector (or water pressure test) for internal testing. If the pipe has cracks, bubbles and other problems, will be detected. After the quality of steel pipe but also through rigorous manual selection. After the quality inspection of steel pipe, spray paint with the number, size, production lot number. And suspended by the crane into the warehouse.

Cold drawn (rolled) carbon steel seamless steel pipe: round tube → heating → punching → start → annealing → pickling → oiling (copper) → multi-pass cold drawing (cold rolling) → tube → heat treatment → straightening → water pressure test (testing) → marking → storage

Carbon steel seamless steel pipe because of its manufacturing process is different, is divided into hot-rolled (extrusion) seamless steel tubes and cold drawn (rolled) seamless steel pipe two. Cold drawn (rolled) tube is divided into two kinds of round tube and special-shaped tube.

In addition, GB / T17396-1998 (hot-rolled seamless steel pipe for hydraulic support), GB3093-1986 (diesel engine high-pressure seamless steel pipe), GB / T3639-1983 (cold drawn or cold-rolled precision seamless steel pipe), GB / T3094-1986 (cold drawn seamless steel pipe shaped steel pipe), GB / T8713-1988 (hydraulic and pneumatic cylinder with precision diameter seamless steel pipe), GB13296-1991 (boiler, heat exchanger with stainless steel seamless pipe), GB / T14975 (Seamless Steel Tube for Automotive Axle Bushings), API SPEC5CT-1999 (Casing and Tubing), GB / T14976-1994 (Seamless Steel Pipe for Fluid Conveying) Specification) and so on.

carbon steel pipe manufacturing

carbon steel pipe manufacturing

The raw material of carbon steel pipe is round pipe billet. The round pipe billet is cut by the cutting machine and processed into the billet with the length of 1 meter. And then sent to th furnace tobe heated by the conveyer belt. The billet is fed into a furnace and heated at a temperature of about 1200 degrees Celsius. The fuel is hydrogen or acetylene. Furnace temperature control is a key issue. After the round tube billet to go through the pressure piercing machine to wear empty. Generally more common punching machine is conical roller piercing machine, this punching machine production efficiency is high, product quality is good, perforation expansion diameter large, can wear a variety of steel. After piercing, the round tube blank has been three-roll cross-rolling, rolling or extrusion. Squeeze after the tube diameter. Sizing machine through the high-speed rotation of the cone drill bit into the steel embryo drilling, the formation of steel pipe. The inner diameter of the pipe is determined by the outside diameter of the sizing bit. Steel pipe after sizing, into the cooling tower, through the water cooling, the cooling pipe, it is necessary to be straightened. After straightening by the steel pipe sent to the metal detector (or water pressure test) for internal testing. If the pipe has cracks, bubbles and other problems, will be detected. After the quality of steel pipe but also through rigorous manual selection. After the quality inspection of steel pipe, spray paint with the number, size, production lot number. And suspended by the crane into the warehouse.

Galvanized Steel Pipe

Galvanized steel pipe is the surface with hot-dip galvanized or electro-galvanized layer. Galvanized steel can increase corrosion resistance and prolong life. Galvanized steel pipe is widely used, except for water, gas, oil, generally low-pressure fluid line pipe, also used oil heater oil industry in particular, marine oil wells pipes, pipelines, chemical coking equipment, condensing coolers, washing coal distillate oil exchange used tubes, as well as the bridge piles, mine tunnel support frame with a pipe.

Galvanized steel pipe is divided into cold galvanized pipe and hot galvanized pipe, which is more extensive use of galvanized steel, hot galvanized steel is widely used in construction, machinery, mining, chemical, railway vehicles, the automotive industry, roads, bridges, container, sports facilities, agricultural machinery, petroleum machinery, prospecting machinery and other manufacturing industries. hot galvanized pipe is molten metal reacting with the iron matrix alloy layer, so that the substrate and coating combination of both. Galvanized pipe is first pickled, the steel surface in order to remove iron oxide, after pickling, cleaning tank by mixing an aqueous solution of ammonium chloride or zinc chloride and zinc chloride or ammonium chloride solution, and then into hot dip tank. Galvanized with coating uniformity, strong adhesion, long life and other advantages. Hot dip galvanized steel substrate with molten bath complicated physical, chemical reactions, the formation of corrosion-resistant zinc-iron alloy structure closely layer. Alloy layer and layer of pure zinc, steel base blend. Therefore it resistant to corrosion.