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.

+ Big Out diameter seamless pipes

Structure engineering

+ Seamless Pipes by applications

Carbon Steel Seamless Pipes

+ Carbon Steel Pipes

Hot rolled seamless steel pipe

+ Hot rolled seamless steel pipe

Precision cold drawn tube

+ Precision cold drawn tube

Galvanized Seamless tube

+ Galvanized Seamless tube

DIN/EN steel pipe
GB steel pipes
JIS seamless pipes
Most common Seamless pipes by applications
Boiler pipes
Boiler tubes
Boiler tubes need to withstand high pressure and temperature.
Tubes for Heat Exchanger and Condensers
Heat Exchanger tubes
Heat exchanger Tubes are used in all types of process industries.
Tubes for Fluid Transportation Service
Tubes for Fluid Transportation
Our fluid tubes are widely used for fluid transport, water conveying...
Carbon steel and carbon manganese steel seamless pipes for ship building
Ship building tubes
Carbon steel and carbon manganese steel seamless pipes for ship building
Seamless steel tubes for low-temperature service
Low temperature service pipes
Seamless steel tubes for low-temperature pressure container piping
Line pipes used in sour service
The line pipes can be used for a wide range of petrol and gas transportation under sour service environment.
Stainless steel tube for heat exchanger
Pipes& Tubes for Pressure
Seamless Pipes and Tubes for Pressure Applications
Seamless pipes for low and medium pressure service
Seamless pipes for pressure service
Applications for low and medium pressure boiler water wall
Seamless pipes for high temperature and pressure service
Pipes for high temperature
Seamless steel pipes for high temperature and pressure service.
Tubes for Mechanical and Automobile
Tubes for Mechanical
Seamless Steel Tubes for Mechanical and Automobile usage...
Leading Big O.D. Steel seamless pipes supplier in Asia
Big O.D. pipes supplier in Asia
Big OD seamless pipes dominates 65% of market share in Chinese boiler industry.
Threaded Casing with Short/Long Round Thread or Buttress
Tubing, Casing and lined pipe
Line pipes are used to transport oil and gas, water, mineral slurry...
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.


Our team are highly trained and experienced in servicing and producing all types of steel supplies. Whether you've got a large construction project, or need parts for industrial machinery, our team of steel fabrication consultants will ensure that your project is provided with the parts you need, when you need them.

Link exchange

Copyright © 2011 Sunny Steel Enterprise Ltd.  All Rights Reserved ICP No.:08010763