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Galvanized steel pipe welding technology
Galvanized steel welding characteristics: Galvanized steel pipe is generally in the low-carbon steel outer layer of zinc-plated, galvanized layer is generally in the 20um thick. Melting point of zinc in 419 °C, bp 908 °C or so. In welding, the zinc melted into the liquid floating on the surface o...Read more -
Features of high-strength structural steel
Due to the high-strength structural steel pipe is formed of high strength steel having a large moment of inertia and flexural modulus, in particular on the requirements of the application due to the need for cold bending processing after the pre-punched, the material would be formed on the surfac...Read more -
Disadvantage and defect of resistance welding
Resistance welding is pressed welders parts between the two electrodes, and go through to the current use of resistance heat generated by current flowing through contact with the workpiece surface and the neighboring regions to be heated to the melting or plastic state, so as to form metal-bindin...Read more -
Galvanized Seamless Pipe
Classification of galvanized seamless pipe Galvanized seamless pipe is divided into cold-plated steel seamless pipe and hot dip seamless pipe. Hot dip seamless pipe The Redu seamless pipe is to make the molten metal and iron substrate reaction, the alloy layer, so that the substrate and coating c...Read more -
ERW pipe welding defects
ERW pipe is the fastest and most efficient tube method, but when produced, there are a variety of high frequency tube welding defects. Analysis of the frequency of inclusions in steel production, the pre-arc fusion inadequate inadequate edge fusion, central fusion deficiencies, stick welding, cas...Read more -
Disadvantages of steel pickling process
Pickling is widely used in hot-rolled sheet metal blank that the removal of surface oxide scale, such as hot-rolled steel pipe in need of phosphate or other surface coating before processing to remove iron oxide; welded pipes in galvanized or other hot-dip galvanizing, plating surface preparation...Read more -
API 5L Linepipe spec
1 Scope 1.1 This specification covers sesamless and welded steel line pipe. It includes standard-weight and extra-strong threaded line pipe. It includes standard-weight and extra-strong threaded line pipe; and standard-weight plain-end,regular-weight plain-end, special plain-end, extra-strong pla...Read more -
API 5L X60 LSAW Steel Pipe
The production flow of LSAW large-caliber thick-wall straight seam double-sided submerged arc welding steel pipes is: firstly mill the edge of medium plate and put it into pressure forming device,form it into a circle according to the mode of J.C.O, and then preweld it after seam butting by seam ...Read more -
Galvanized steel pipe
When we discuss seamless steel pipe, Seamless steel pipe is with a wide range of applications in our construction industry. in general, Galvanized seamless tube is the hot dip galvanized and electro-galvanized two categories. The first to introduce hot-dip galvanizing, including wet, dry the, lea...Read more -
ERW pipe hardness and quench
ERW steel pipe surface heat treatment is usually heated by induction heating or flame way. The main technical parameters is surface hardness, local hardness and effective case depth. Vickers hardness test hardness can also be used Rockwell hardness (hrc) or surface. Test Force (ruler) of choice a...Read more -
Difference between ms pipe and cast steel pipe
Cast steel pipe is pipe with casting. Cast steel pipe is for water supply, drainage and gas pipelines, which includes cast straight pipe and fittings. Labor intensity. By casting methods, it is divided into continuous cast steel pipe and centrifugal cast steel pipe, cast steel pipe which is divid...Read more -
Difference Between ERW SSAW LSAW
Steel pipe for pipe technology, can be divided into (SML), mainly as the Oilfield internal transportation pipeline and small-diameter high-pressure natural gas pipeline, used for a small number of long-distance gas pipeline, the vast majority of long-distance pipeline with Direct seam high freque...Read more