Galvanized steel pipe, in order to improve the corrosion resistance of steel tube, for galvanized welded steel pipe commonly. Zinc galvanization steel tube hot dip galvanized and electrical steel, hot dip galvanized zinc coating thickness, the cost of electric is low. Oxygen tube welding is used for steelmaking oxygen tube. It is generally with small diameter welding pipe, specifications by 3/8 inch - 2 inch eight. With 8, 10, 15, 20, or Q195 - made of Q235 steel strip. For corrosion protection, some aluminized processing.
The wire casing is ordinary carbon welded steel pipe, used in concrete and various power distribution project, common nominal diameter from 13-76 - mm. Wire set set wall is thinner, mostly for coating or galvanized after use, requirements for cold bending test. The metric system of welded pipe, which specifications in the form of a seamless tube, expressed in mm outside diameter with thick wall of welded steel pipe. It can be used for ordinary carbon steel, quality carbon steel or low alloy steel in the tropics, cold welding, or with tropical again after the cold welding method is made. Metric can tube welding points, and thin wall, the common used as a structure, such as transmission shaft, or transmission fluid, thin wall used to make furniture, lamps and lanterns and so on to ensure that the steel pipe strength and bending test.
The roller tube is used in belt conveyor roller welded steel pipe. Q215, Q235A, B are commonly used in steel and 20 steel manufacture, 63.5 219.0 mm in diameter. Of tube bending, end face to the center line of the vertical, ovality has certain requirements, general water pressure and the flattening test. Transformer tube is used in the manufacture of transformer radiator pipe and other heat exchanger. It is using common carbon steel manufacturing, requirement of flattening, flaring, bending and hydraulic test. Welded steel pipe to length or delivery times ruler, steel tube bending has certain requirements. Welding thin wall pipe is mainly used for making furniture, toys, lamps and so on. The current belt made of stainless steel thin wall welded steel pipe application is very wide, senior furniture, decoration, fencing and so on.
General welded pipe is used for transporting low pressure liquid. Use Q195A, Q215A, Q235A steel manufacturing. Also can be used to other mild steel welding manufacturing. Welded steel pipe for pressure, bending, flattening and so on experiment, the surface quality is a certain request, usually the delivery length is from 4 to 10 m, which often required scale delivery of the goods. Of the specifications of the welded steel pipe in nominal diameter nominal diameter is different from the actual, welded pipe with wall thickness by the regulation with ordinary steel pipe and thickening steel pipe, steel pipe and the form of the pipe end points with thread and don't take two.
One of the most famous international standards organizations is American Society for Testing and Materials (ASTM International). ASTM International was founded in 1898 by a group of engineers and scientists led by Charles Dudley. At first the society was committed to solving the problem of frequent rail breaks across the country. Rail breaks not only plagued the development of the rail industry but also stained the reputation of track manufactures and led to accidents that could have been avoided. To deal with the problem, the scientists, along with professional technicians, developed a standard for the steel used to produce rail tracks. Now industry standards made by ASTM International can be generally divided into six categories: ASTM Standard Specification, ASTM Standard Test Method, ASTM Standard Practice, ASTM Standard Guide, ASTM Standard Classification, and ASTM Terminology Standard. In terms of steel pipes, ASTM International has produced a number of standards. For example, ASTM 420 sets out general requirements for steel pipe producers; ASTM A107 stipulates the quality standards of API steel pipe for the transportation of oil; ASTM G38 specifies the standard practice for the corrosion treatment of seamless steel pipe.
The American National Standards Institute (ANSI) is a non-profit standards organization. It is committed to the development of voluntary consensus standards for products, services, processes, systems, and personnel to ensure that products made in the United States can be sold and used worldwide. It not only accredits standards set by other standard-setting organizations and government agencies but also grants personnel certification in accordance with the requirements in widely recognized international standards. Concerning the piping industry, ANSI has both produced and accredited a number of standards. For example, ANSI A698 specifies the quality standards for carbon steel pipe for general industrial use and ANSI 709 stipulates the specification for steel shapes, plates and bars for bridges.
There are also regional standards for seamless steel pipe. Saudi Aramco References (SAR), for instance, include three standards: Saudi Aramco Engineering Procedure (SAEP), Saudi Aramco Materials System Specification (SAMSS), and Saudi Aramc Inspection Requirements. In general, API steel pipes, imported from or exported to Saudi Arabia, are carefully inspected and tested in such aspects as the resistance of two hydrogen-induced cracking and fracture control strictly according to these standards. The brief introductions which is helpful includes standards of all areas in the seamless steel pipes.
In 1911, the black steel pipe was developed by John Moon. He invented a machine which was adopted by most manufacturers and the machine improve the production process of black steel pipes. You are advised to choose the API steel pipe from a reliable supplier. Initially, the seamless pipes are made by drilling holes through the cylinders. But, the precision of the thickness is hard to control until a new method came out in 1888. The melted steel was covered around the brick and while removing the brick, the hollow pipes would be created.
The black steel pipes are popular for its easy maintenance. They could be used to transfer the gas and water, and they could be used to form the drain system, but the portable water should not be transferred by them. You are advised to choose the black steel pipe from a reliable supplier. Besides, the steel pipes could be used to protect the electrical wires. Further more, thanks to the stability, the steel pipes could be used to transfer high pressure gas or water.
Nowadays, the steel pipes are allowed for higher quality to apply to more applications. Generally, the thicker the pipe wall is, the more pressure it could holds. You are advised to choose the welded steel pipe from a reliable supplier. Before selling the black steel pipes in the market, the manufacturers have tested the quality of the pipes through a specific machine. It fills the pipes with water and continue to heighten the pressure to determine the pressure the pipes could hold. The unqualified pipes would be scrapped. Shanghai Xin Lin Co., Ltd. Tel: +86-021-61395200 Mobile No: +86-13611965409 Fax: +86-021-51561726 E-mail: frank@xinlinsteel.com Address: Room 513,No.1, Lane 1029,Kong Jiang Road,Shanghai, China Website: http://www.xinlinsteel.com/logistic.html
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