Corrosion is one of the important problems that can not be ignored in the production of enterprises, especially in the petrochemical industry, shipbuilding, etc., which is full of more corrosive substances such as carbon dioxide, sulfur dioxide, hydroxides ...

Polytetrafluoroethylene (PTFE) is known as the “king of plastics”, and Roy Planck, the father of fluororesin, 1936 In, DuPont company began to study Freon’s substitutes. They collected part of tetrafluoroethylene and stored it in the stee ...

The surface of stainless steel pipe fitting is not uniform. When heat treatment is heated, it is necessary to make the oxide skin evenly. To reach the first, the quality of the surface of the stainless steel pipe fitting is mainly determined by the acid wa ...

ERW,SAW and EFW are the commonly used welding process,they have different process and use condition.Let’s see what’s the define of ERW,SAW and EFW? ERW-Electric Resistance Welded For pipes or tubes size 4 inch (10.2mm) OD and below, strip is fe ...

In EFW welding process, the external high energy electric arc is used to create a weld joint. Once the welding is done, the excess weld material from outside and inside of the pipe is removed with the help of trimmer tools. In general, to reduce the negati ...

Both the straight welded pipe and the spiral welded pipe are one kind of welded steel pipes, which are widely used in the national production and construction. Because of the different production processes, the straight welded pipe and the spiral welded pi ...

Seamless steel pipe can be divided into hot rolling and cold drawing according to production methods. What’s the difference between them? 1. Different classification Hot rolled seamless pipe is divided into general steel pipe, low and medium pressure ...

EFW steel pipe (Electric Fusion Welding steel pipe) refers to an electron beam welding, the use of high-speed movement of the electron beam directed impact kinetic energy is converted to heat the work-piece so that the work-piece leaving the melt, the form ...

The vast majority of welding methods of pipeline products can be divided into electric resistance welding (ERW), longitudinal submerged arc welding (LSAW), spiral submerged arc welding (SSAW). And LSAW can be divided into UO (UOE), RB (RBE) and JCO (JCOE) ...

In the last article,we talked about different welding types.MIG and TIG are two important welding types.What the difference between them? Tungsten inert gas (TIG) welding S.no MIG Welding TIG welding 1. MIG stands for Metal Inert Gas Welding. It is al ...

In steel pipeline industry,we often hear of seamless or welding fittings.Especially for big sizes fittings,the welding is necessary in the production.What does welding mean?And why is it important? Welding is a material joining process performed by applica ...

The main types of welding used in industry are commonly referred to as Mig welding, Arc welding, Gas welding, and Tig welding. Mig Welding – GMAW or Gas Metal Arc Welding More commonly called MIG welding this welding type is the most widely used and perhap ...

Ultrasonic testing (UT) is a family of non-destructive testing techniques based on the propagation of ultrasonic waves in the object or material tested. In most common UT applications, very short ultrasonic pulse-waves with center frequencies ranging from ...

Eddy current array (ECA) is a nondestructive testing technology that provides the ability to electronically drive multiple eddy current coils,which are placed side by side in the same probe assembly.Each individual eddy current coil in the probe produces a ...

Penetrant method of non-destructive testing is dedicated to detecting surface defects invisible to the naked eye. It is based on use of capillary properties of liquids (namely, on capillary penetration of special indicator liquids inside defects). This met ...

Radiographic Testing (RT) is a non-destructive testing (NDT) method which uses either x-rays or gamma rays to examine the internal structure of manufactured components identifying any flaws or defects. In Radiography Testing the test-part is placed between ...

Magnetic particle inspection (often abbreviated MT or MPI) is a nondestructive inspection method that provides detection of linear flaws located at or near the surface of ferromagnetic materials. It is viewed primarily as a surface examination method. Magn ...

To assure weld quality, all welds should be inspected. In some cases, the inspection involves nothing more than a visual examination by the welder. However, a good-looking weld does not always ensure internal quality, so it’s important to conduct som ...

When the stainless steel pipe fittings or forged steel flange products are manufactured in our factory,we should keep attention to the intergranular corrosion of such piping products.The microstructure of metals and alloys are made up of grains,and they ar ...

The service life of the pipeline is directly related to the anticorrosion construction of the pipeline, so the measures for the anticorrosion construction of the pipeline should be optimized, and the construction quality and key points should be controlled ...