Production process of spiral steel pipe

Spiral steel pipe is a strip coil as raw material, often warm extrusion molding, automatic double wire-sided submerged arc welding process welded spiral seam steel pipe main production processes are as follows:   Production process of spiral steel pipe 1. unwinding board probe: After entering the unwinding plate production line, the first full-board ultrasonic testing. 2. […]

Stainless steel rectangular pipe

Stainless steel rectangle pipe is a hollow strip steel pipe, a large number of used for conveying fluid pipe, such as oil, natural gas, water, gas, steam, etc., in addition, doing bending and torsional strength phase at the same time, the weight is lighter, it is widely used in the manufacture of machinery parts and engineering […]

What is the high temperature alloy?

What is the high temperature alloy? High temperature alloy is also called hot strong alloy, super alloy. The materials can be divided into three groups: iron, nickel and chromium. According to the production method can be divided into the deformation of high temperature alloy and cast high temperature alloy Classification according to the matrix elements, […]

The advantages of duplex steel

The advantages of duplex steel mainly have the following points: (1) with good corrosion resistance, its wear resistance and corrosion resistance are better than that of austenitic stainless steel. (2) enough plastic toughness needed for forming. The use of duplex stainless steel production tank or pressure vessel wall thickness, is conducive to reduce costs. Has excellent […]

Production method of stainless steel seamless pipe

Stainless steel seamless pipe according to the different production methods can be divided into hot rolling, cold rolling tube, cold drawn tubes, extruded tube, etc. 1, hot-rolled seamless steel pipe in automatic rolling on production unit. Solid billet through inspection and clear the surface defects, cut into the required length, centering on the tube billet perforation […]

Process for pickling and passivation of stainless steel pipe fittings

Stainless steel pipe fittings for pickling passivation operation steps: 1. The preparation work 2. Chemical degreasing 1) chemical degreasing adopts groove soaking method, in addition to tank made of steel plate, the lining of PVC or PE. 2) use 12 ~ 15% (by volume) of nitric acid chemical degreasing treatment, temperature of 40 ℃ ~ 60 […]

The application of the stainless steel welded pipe in the oil refining industry

Oil refining device of stainless steel welded pipe, generally exist in the process of using the following questions: (1) the stress corrosion cracking, transgranular fracture (mainly chloride), intergranular stress corrosion cracking (mainly sulfide). (2) the pitting corrosion, intergranular corrosion, (3) the naphthenic acid corrosion, mouth (4) the carburizing embrittlement. Corrosive factors mostly in oil refining crude […]

The application of stainless steel welded pipe in seawater desalination device

For seawater desalination technology, energy conservation and the development of practical method is to use an evaporative enrichment equipment – VVCC (that is, the vacuum and evaporation, condensation, aggregation). The device adopts the heat pump, stainless steel welded pipe can use evaporation and transform it into heat energy supply system, so as to realize the energy conservation. […]

Selection of five factors to consider stainless steel pipe

When selecting stainless steel welded pipe in the corrosive environment, in addition to deal with the working conditions of stainless steel welded pipe has a detailed understanding, also need to consider the main factors are: stainless steel welded pipe corrosion resistance, and strength, toughness and physical properties, processing, formability, resources, price and obtain easily. 1. The corrosion […]

Stainless steel elbow compared with carbon steel elbow

The material of stainless steel elbow, usually on the basis of the carbon steel elbow increased the proportion of Cr, Ni alloy, such as content ratio can reach more than 20%. Common steel grade are: 304、 304 L、 321、 316、 316 L、 1 cr18ni9ti、 0 cr18ni9, its chemical composition can keep the elbow surface for a […]

« Older posts