Seamless steel pipe detection

A seamless steel pipe is a pipe that does not have any welding seam. The seamless steel pipe will ideally be a solid metal tube with each end connected to another tube without having any welding joint. These pipes have threads either at one end or at both ends and can be threaded to the end of another hollow tube or pipe.

The presence of any seam on a welded pipe acts as a weak point, however if the tube is seamless, it tends to be solid and overcome various industrial forces and pressures while in operation.

A seamless pipe may also be known as a seamless tube.
DIN/EN steel pipe
GB steel pipes
JIS seamless pipes
Sunny Steel explains Seamless steel pipe

A Seamless steel pipe can be made from any of several alloys and metals such as carbon steel, stainless steel, molybdenum or tungsten.

Some of the differences between Seamless steel pipes and welded tubes are:

A Seamless steel pipe is extruded and drawn from a billet whereas a welded tube is produced from a strip that is roll formed and welded to produce a tube.

  • Since a Seamless steel pipe offers a higher range of safety measures it is more expensive than a welded tube.
  • A Seamless steel pipe is relatively short in length, whereas welded tubes can be manufactured in long continuous lengths.
  • A Seamless steel pipe generally doesn't show any sign of corrosion until and unless it is subjected to a highly corrosive environment, whereas the weld area in the welded tube is much more prone to corrosion attacks.
  • A welded area is considered to be inhomogeneous, thus it exhibits a different malleability and less corrosion resistance as well as greater dimensional variation.
  • A Seamless steel pipe eliminates any such issues and thus offers high corrosion resistance.
Characteristics of Seamless Steel pipe

Seamless steel pipe for the use of engineering and construction is very widely, it is a hollow steel strip no seams, it is mainly used to transport liquids pipelines, different look and general steel,one of those heavy type steel, it has a strong resistance to corrosion, resistant to general corrosion.

  • high precision can do small batch production.
  • smaller diameter.
  • weldability strong, high compression capability.
  • steel pipe superior performance, relatively dense metal.
  • Steel Cross area is more complex.
  • high precision cold drawn products, good surface quality.

3.低中压锅炉用无缝钢管(GB3087-1999)是用于制造各种结构低中压锅炉过热蒸汽管、沸水管及机车锅炉用过热蒸汽管、大烟管、 小烟管和拱砖管用的优质碳素结构钢热轧和冷拔(轧)无缝钢管。
9.石油钻探管(YB528-65)是用于石油钻探两端内加厚或外加厚的无缝钢管。 钢管分车丝和不车丝两种,车丝管用接头联结,不车丝管用对焊的方法与工具接头联结。(021-57590365)
10.船舶用碳钢无缝钢管(GB5213-85)是制造船舶I级耐压管系、Ⅱ级耐压管系、锅炉及过热器用的碳素钢无缝钢管。碳素钢无缝钢管管壁工作温度不超过450℃, 合金钢无缝钢管管壁工作温度超过450℃。
15.结构用不锈钢无缝钢管(GB/T14975-2002)是广泛用于化工、石油、轻纺、医疗、食品、 机械等工业的耐腐蚀管道和结构件及零件的不锈钢制成的热轧(挤、扩)和冷拔(轧)无缝钢管。

Tech & Service of Seamless pipe

Seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless pipes dominates 65% of market share in Chinese boiler industry.

How to make seamless pipe(seamless pipe process)?
Hot Piercing Workshop
Piercing process
The cross roll piercing and pilger rolling process in the size range from approx. 250 to 660 mm outside diameter.
Precision cold drawn steel tube production process
Pipe weld cracks
often follow different mechanisms can be divided into two types of thermal cracking and cold cracking.
How to calculate a steel pipe and tube theoretic weight
Calculate a steel pipe?
Pipe fittings are necessary to join together pipes, or to change the direction of an existing pipe.
Pipe beveling
Pipe beveling is the process where an angle is formed between the edge of the end of a pipe or tube and a plane perpendicular to the surface.
Steel pipe cutting machine
Pipe cutting
Cutting tools have a grinding wheel piece cutting machine (also known as toothless saw), hand saw, cutter and other hand tools.
Packing the steel pipes
There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method.


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