ASTM A53 ASTM A252 Q235 Spiral Welded Steel Pipe use for transmission

ASTM A53 ASTM A252 Q235 Spiral Welded Steel Pipe use for transmission

What is a welded steel pipe?
Welded steel pipe refers to welded steel strip or plate by means of bent round, square and other shapes and then welded into the surface of the steel pipe seam.
Welded steel blanks is used in steel sheet or strip, according to the different welding processes, it can be divided into the furnace pipe, ERW pipes and automatic arc welded pipe. Because of the different forms of welded pipe, which is divided into two and spiral welded pipe. Its shape is divided into round ends welded and shaped (square, flat, etc.) pipe.

Welded steel pipe, welded steel common market in general are: double submerged arc welded pipe(DSAW pipe), high-frequency welded pipe (HFW pipe), spiral submerged arc welded pipe(SSAW pipe). Double submerged arc welded pipe is made using the molding machine has a tube opening, re-use double-sided submerged arc welding. Pipe is the use of high-frequency skin effect of high frequency current production of steel. The use of a narrow spiral submerged arc welded pipe is made of steel pipe-shaped roll, and use submerged arc welding, spiral weld, the weld compared Longitudinal length, compared with Longitudinal, it can use a specification made with a variety of large-diameter steel pipe.
Longitudinal spiral steel strength is generally higher than that, which can narrow the billet production of large diameter pipe, you can also use the same width of the billet production of different pipe diameters. However, compared with the same length of straight seam pipe, weld length of 30 to 100%, and lower production rate. Therefore, smaller diameter pipe is mostly a straight seam welded, large diameter spiral welded pipe is mostly used.

ERW pipes are available in sizes between 1/2 and 20 inches, in carbon steel (ASTM A53 is the most common specification) and stainless steel (ASTM A312). In terms of dimensions, the ASME B36.10 and ASME B36.19 are the key reference specifications (API 5L for welded ERW line pipes).
The ASME and API dimensional charts show typical combinations of pipe nominal size and wall thickness (designated as “schedule”), and show ERW pipe weight in kg (or pounds).
In the last few years, ERW pipes are have become an efficient alternative to seamless pipes, both in terms of price and performance, due to the modern welding technologies adopted by ERW pipe manufacturers (example HFI and HFW, high-frequency welding). These advancements in welding technologies have reduced, over time, the technical superiority of seamless pipes vs ERW pipes, making them interchangeable at least in some applications (low/medium pressure and temperature). Of course, seamless pipes will always benefit from the intrinsic superior mechanical strength of steel billets vs. coils and plates.