OEM custom galvanized steel pipe round metal pipe welded seamless
steel pipe
Steel grades used in pipes
carbon steel
Carbon steel accounts for about 90% of total pipe production. They
consist of relatively small amounts of alloying elements and are
generally weaker when used alone. Due to their adequate mechanical
properties and machinability, their cost may be lower and they may
be more suitable especially for low stress applications. A lack of
alloying elements reduces the suitability of carbon steels for high
pressure applications and extreme conditions, so they become less
durable under high loads. Probably the main reason why carbon
steels are preferred for pipes is their advanced ductility and
non-bending properties under load. They are commonly used in the
automotive and marine industries, as well as in oil and gas
transportation. A500, A53, A106, A252 are carbon steel grades
available as seamed or seamless
Stainless steel
Stainless steel can also be included in the alloy steel series. The
main alloying element in stainless steel is chromium, which varies
between 10-20 weight percent. The main purpose of adding chromium
is to give the steel stainless steel properties by preventing
corrosion. Stainless steel pipes are often used in extreme
conditions where corrosion resistance and high strength are
critical, such as in the marine industry, water purification,
pharmaceutical and oil and gas industries. 304/304L and 316/316L
are stainless steel grades available for pipe production. The 304
grade has good corrosion resistance and strength; due to the low
carbon content, the 316 series has lower strength and can be welded
Galvanized steel
Galvanized pipes are steel pipes that have been treated with a zinc
coating to prevent corrosion. Zinc coating prevents corrosive
substances from corroding pipes. It used to be the most common type
of pipe in water supply lines, but due to the labor and time
involved in cutting, threading, and installing galvanized pipe, it
is no longer used much, except for limited maintenance purposes.
These types of pipes range in diameter from 12 mm (0.5 in) to 15 cm
(6 in). They are 6 meters (20 feet) long. However, galvanized pipes
for water distribution can still be seen in larger commercial
applications. A significant disadvantage of galvanized pipe is its
40-50 year lifespan. Although a zinc coating covers the surface and
prevents external substances from reacting with the steel and
corroding it, if the substance being conveyed is corrosive, the
pipe may begin to corrode from the inside. Therefore, it is very
important to control and upgrade galvanized steel pipes in a
certain period of time
Pipe type
According to the manufacturing method, pipes are divided into two
categories: seamless pipes and seamed pipes. Seamless tubes are
formed in one stage during rolling, but seamed tubes require a
welding process after rolling. Due to the geometry of the weld,
seamed pipes can be divided into spiral welded and straight welded.
Although there is debate about whether seamless steel pipe is
superior to seamed steel pipe, both seamless steel pipe and welded
steel pipe manufacturers can produce steel pipes that provide high
quality, reliability and corrosion resistance. When determining the
type of piping, the main focus should be on the specification and
cost aspects of the application
seamless pipe
Seamless tubes are usually made in complex steps, starting with
drilling a hollow from a billet, through cold drawing and cold
rolling processes. In order to control the outside diameter and
wall thickness, the size of seamless type is more difficult to
control than welded pipe, and cold working improves mechanical
properties and tolerances. The most significant advantage of
seamless pipes is that they can produce thick wall thicknesses.
Since they have no welds, they are considered to have better
mechanical properties and corrosion resistance than seamed pipes.
In addition, seamless pipes are expected to achieve better ovality
or roundness. They are generally preferred for use under extreme
environmental conditions such as high loads, high pressures and
high corrosiveness
seamed tube
Welded steel pipe is made by welding the rolled steel plate through
a seam or a spiral seam. There are different methods of
manufacturing welded pipes depending on the overall size, wall
thickness and application. Each method starts with a hot billet or
flat strip of steel, then pipes are made by stretching the hot
billet and pressing the edges together and sealing them with a
weld. Compared to seamless pipes, seamed pipes have tighter
tolerances but thinner wall thicknesses. Shorter lead times and
lower costs may also be the reasons why seamed pipes are better
than seamless ones. However, the finish of the inner and outer
surfaces of the pipe should be controlled during production as the
weld may constitute a sensitive area that may be suitable for any
crack propagation and cause the pipe to break
product description
| product name | Manufacturer Hot Dip GI Construction Scaffolding Round Welded
Pre-Galvanized Steel Pipe |
| Processing service | Welding, punching, cutting, bending, painting, custom lengths,
packaging |
| grade | A106 A53 Gr.B A315 20#-45# |
| surface | Oiled/Black Painted or Customized |
| Package | Waterproof packaging or as required |
| shape | round, square, rectangle, oval |
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