Welded Pipes

Product Details:

Spiral Welded Pipes is used in industry, also known as spiral steel pipe or spiral welded pipe, and it is to roll the low carbon structural steel and low alloy steel strip to tube according to certain helix angle, and then welded pipe joints. Let me introduce you the characteristics and the usage of the spiral pipe.

Product Details:

MS Black Pipes or Mild Steel Black Pipes is called MS Black Pipe because it is not galvanized and is an ideal product to be welded into pipes, tubes and other kinds of tubing. It is one of the cheapest metals available in the market and can last up to 100 years if placed in a well maintained environment. The high quality steel used to manufacture black pipes makes it one of the most used ones in the construction and general engineering industries today.

Product Details:

Galvanized Welded Pipes production process for a low-pressure fluid, which is characterized by hot-rolled steel is first galvanized, then slitting the strip of galvanized welded into a tube, outside the weld with zinc spraying device to spray zinc. Production processes of galvanized welded steel pipe is coated welding process that first hot-dip galvanized and hot-rolled steel, then galvanized steel coil slitting galvanized steel strip into a tube with high-frequency welding. outside the weld using zinc spray device for spraying zinc processing, within the weld does not require treatment to meet the national standard galvanized pipe. The abolition of the present invention the process of pickling and serious pollution of the environment, simplifying the production process, the product surface smooth, uniform zinc coating, and reduce the consumption of zinc.

Product Details:

Welded pipe starts out as a long, coiled ribbon of steel called a skelp. The skelp is cut to the desired length, resulting in a flat rectangular sheet. The width of that sheet’s shorter ends will become the pipe’s outside circumference, a value that can be used to calculate its eventual outside diameter.

The rectangular sheets are fed through a rolling machine that curls the longer sides up toward one another, forming a cylinder. In the ERW process, high-frequency electrical current is passed between the edges, causing them to melt and fuse together.

An advantage of ERW pipe is that no fusion metals are used and the weld seam cannot be seen or felt. That’s opposed to double submerged arc welding (DSAW), which leaves behind an obvious weld bead that must then be eliminated depending on the application.

Welded pipe manufacturing techniques have improved over the years. Perhaps the most important advancement has been the switch to high-frequency electric currents for welding. Prior to the 1970s, low-frequency current was used. Weld seams produced from low-frequency ERW were more prone to corrosion and seam failure.

Product Details:

Welded steel pipe is formed by rolling plate and welding the seam. It is cost-effective pipe with tighter Dimensional tolerances and less weight. It is intended for conveying gas, vapor, water or other liquid in low and medium pressure ambient, such as water mains system, sewerage system, Oil and gas pipeline, fire protection service, etc. There are ERW and EFW production processes. And we mainly supply HFW (High frequency welding) pipe in advanced technology. The weld seam of HFW pipe is heat treated after welding that no untempered martensite remains. And the weld flash can be removed from both inner and outer surfaces.