Spiral steel pipe anticorrosion main is according to the requirements of the environment to decide, if the local particularly strong acidic or alkaline that have to do, anti-corrosion, if the spiral steel pipe for pipeline, also must do anti-corrosion. Spiral steel pipe common anticorrosion technology mainly include inside and outside the anti-corrosion two kinds.

Underground or underwater steel oil, gas, water supply, heat supply pipeline, steel structure, port, ship, sluices, gas tank, oil refining, chemical equipment, concrete pipe, sewage pool, the roof waterproof layer, toilet, basement, etc at the time of application of spiral steel pipe should be carried out anti-corrosive treatment.

When the spiral steel pipe used for thermal insulation pipe using, people usually don't do anticorrosive processing, thermal insulation pipe itself already contains the embalming process.

Spiral steel pipe main technical features: molding process, the steel plate uniform deformation, residual stress is small, looks not attack damage. Processing of spiral steel pipe on the diameter and wall thickness of the scale of the standard size more flexibility, especially in the production of high grade thick wall tube, especially small and medium caliber thick wall tube side has incomparable advantage over other techniques, can be satisfied with the user more requirements in terms of spiral steel pipe specification. And the use of advanced double-sided submerged arc welding process, welding can be done in the best position, not easy to render the wrong side, welding and other shortcomings and lack of penetration, simple manipulation of the welding quality. To check the quality of steel pipe for 100, make the whole process of steel tube produced under useful detection, monitoring, have land to ensure product quality. The whole production line all equipment has the function of accounting and machine data collection system networking, complete the data real-time transmission, by the central control room of the technical parameters in the process of producing. Spiral steel pipe before leaving the factory should be tested for mechanical properties test and flattening experiment and flaring.


To reach the specification rules requirements. Straight seam steel pipe quality test method is as follows: judging from the outside, in the appearance inspection. Procedures of the appearance of the welding joint inspection is a kind of concise and using a wide range of inspection method, is an important content of product inspection, the first is found that the weld appearance defects and the error of the scales. Generally after investigation to the naked eye, with the standard sample, gauge and a magnifying glass, etc) for inspection. If the present shortcomings of weld appearance, may exist within the weld has faults. Here are other connection method characteristic in detai

Spiral steel pipe anticorrosion main is according to the requirements of the environment to decide, if the local particularly strong acidic or alkaline that have to do, anti-corrosion, if the spiral steel pipe for pipeline, also must do anti-corrosion. Spiral steel pipe common anticorrosion technology mainly include inside and outside the anti-corrosion two kinds.

Underground or underwater steel oil, gas, water supply, heat supply pipeline, steel structure, port, ship, sluices, gas tank, oil refining, chemical equipment, concrete pipe, sewage pool, the roof waterproof layer, toilet, basement, etc at the time of application of spiral steel pipe should be carried out anti-corrosive treatment.
When the spiral steel pipe used for thermal insulation pipe using, people usually don't do anticorrosive processing, thermal insulation pipe itself already contains the embalming process.

Seamless steel pipe for any country are the lifeblood of the industrial development, has the industrial blood, in the production of seamless steel tube with a strong role in the economic development, can say, if left the seamless steel tube, a lot of such as oil, chemical, steel, machinery, military industry, aerospace and other industrial development will be impossible. Seamless steel tube of the application is very widespread in accordance with the purpose to points can be broadly divided into general purpose seamless tube, such as: used for conveying liquid, gas pipelines, machining parts, etc. And is a specialized seamless steel tubes such as boiler pipe, geological survey, bearing seamless pipe seamless tube, acid, etc.
Seamless steel tube production process:

The tube billet preparation and checking - tube billet heating - punch - tube rolling - diameter steel pipe heating again - > set (reduction) - heat treatment - the finished tube straightening to finishing, inspection, nondestructive, physics and chemistry, detection) - > put in storage

Hot rolled seamless steel tube of the delivery is generally hot rolled state after heat treatment for delivery of the goods.

Usually the use of precision tube are directly, but sometimes may be on the bending process, if ordinary precision tube wall thickness thinner cases have a plenty of can directly bending or other processing, but if the larger wall thickness is not suitable for direct to bend and so on a series of mechanical processing, the precision of this kind of circumstance to bend light pipe must be annealing processing before processing.

Annealing is a kind of metal heat treatment process, the primary method of annealing process is the metal slowly heated to a certain temperature and keep a long enough period of time again at the speed of suitable for cooling. Purpose is to reduce the hardness of the metal, strengthen the cutting performance of the metal, eliminate the residual stress inside the metal, stable size, reduce the deformation and crack tendency, refine the grain size, adjust the organization, eliminate the tissue defects.

Annealing is completed, we can directly on steel pipe or bending machining processing technology so as to solve the steel pipe for cracking occurs in the process.

Galvanized square tube has hot galvanized square tube and electric galvanized square tube two categories.Hot-dip galvanized square pipe has wet method, dry method, lead zinc method, REDOX method, etc.The main difference of different hot-dip galvanizing methods is the method to activate the surface of the steel tube to improve the quality of galvanizing after the steel tube is cleaned by acid leaching.The dry method and REDOX method are mainly used in current production, and their characteristics are shown in the table.The surface of electroplating zinc layer is very smooth and compact, and the structure is even.Good mechanical properties and corrosion resistance;Zinc consumption is 60%~75% lower than hot dip galvanization.Electroplating has certain technical complexity, but it is necessary to use this method for single-side coating, double-side coating with different thickness on inner and outer surface coating, and thin-wall galvanized tube