KNOWING THE DIFFERENCE OF SEAMLESS PIPES AND WELDED PIPES
In mechanical work - plumbing, we often encounter pipe material. In general, the pipe can be defined as a relatively long object, has a hole and serves to move a substance or material that has flow characteristics. Such materials may be liquids, gases, vapors, melted solids or very fine granules.
On this occasion, we will postingkan one type of pipe material, that is seamless pipe. For mechanical people, seamless pipes may be familiar. But for a non-mechanical person it may still be wondering what is a seamless pipe? For people who work in projects, even though we are not mechanical people, but we also have to know this type of pipe.
Seamless pipes in the sense of language are pipes without connections. In the practice of manufacture, seamless pipe is indeed a pipe formed without making a connection at all, so that no part of the pipe has ever been disrupted or changed material due to heat welding. This pipe is made of solid cylindrical steel, which is perforated in almost melting conditions, commonly called billets.
With the method of making without the join, the resulting pipe can be better because the quality of the resulting steel is almost the same on every surface area of ??the pipe. In addition, the thickness by using this method, pipe that has any thickness allows to be produced. Usually this type of pipe is made for diameter size under 8 ".
Seamless pipes have been used by humans thousands of years ago. The first pipe exists, used for flowing water from the river to the fields. In China the pipe is used to move water to the desired place, through bamboo since 2000 BC. At the beginning of the 16th century precisely in 1652 water buildings were made in boston using hollow wood as a substitute for steel pipe that has not been found at that time. In 1815 William Murdock used a pipeline to run coal gas used for lighting in London.
In 1824 James Russel invented the method of making a seamless pipe by unifying the two edges of a thin iron plate. First the metal is heated to malleable then folded and welded and resolved by merolling the welded pipe. Now the technique in pipeline manufacturing is so diverse that it has properties and uses in certain conditions.
The pipe materials as new seamless pipe material structure can be divided in general as follows:
Pipe is a cylindrical object with a hole in the middle made of metal or other materials as a means of fluid flow or transport fluid, gas or air. Pipe terminology is usually equated with the term tube, but usually the term is for pipes that have a diameter of more than 3/4 inch.
Pipe Making Materials
The pipe material in question is the raw material structure of the pipe, which can be divided in general as follows:
As for the pipe material in particular can be grouped into:
Wrought Iron (iron without wrought)
Red Brass (red brass)
Nickel cooper = Monel (copper tin)
Nickel chrom iron = inconel (lead iron chrom)
Basically the type of pipe that is widely used in the industrial sector is Carbon steel, following types of methods used for the manufacture of carbon steel (Carbon steel):
a. Straight Welded Pipe
Also referred to as UOE pipes. The raw material for making this pipe is a steel plate with strip profile shape. The steel plate is formed into a pipe by bending the pipe toward its short axis with a shaper roll to form a pipe. The gap between the two sides of the strip plate is then welded lengthwise to form a pipe without a gap. The details of making butt-welded pipe are shown in the figure below.
This pipe has the advantage that the quality of the pipe wall is very easy to control and has a uniform thickness. This is because the pipe is derived from the strip plates that make it relatively easy to control the quality and thickness of the plate, so the results when made into the pipe was relatively as good as the quality of the plate before it. In addition, if the required long pipe is long enough, this pipe has an advantage because it is easy to fabricated.
But in the oil and gas industry, this type of pipe is more often found in the form of elbow. This type of pipe is avoided as a long tube because it has a weakness in the weld joints of both edges of the strip plate at the time of manufacture, which requires inspection of the welding area, extending along the pipe