Home > Products > Seamless steel pipe/tubes

Carbon Steel Pipes

Please read more informations about About carbon steel pipe tubing as below:

Available Specification

Looking for a Carbon Steel Seamless Pipes Supplier?

We can help supply all of the Carbon Steel Seamless Pipes or linepipe supplies that your company needs for use in the oil or natural gas industries. Carbon steel is a metal alloy that is formed as a result of combining iron and carbon.

ASTM / ASME  
Product name Executive standard Dimension (mm) Steel code/ Steel grade
Black and Hot-dipped Zinc-coated Steel Pipes Seamless ASTM A53 0.3~1200 x 1.0~150 GR.A, GR.B, GR.C
Seamless Carbon Steel for High Temperature Service ASTM A106 10.3~1200 x 1.0~150 GR.B, GR.C
Seamless Cold-drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes ASTM A179 10.3~426 x 1.0~36 Low Carbon Steel
Seamless Carbon Steel Boiler Tubes for High Pressure ASTM A192 10.3~426 x 1.0~36 Low Carbon Steel
Seamless Cold-drawn Intermediate Alloy Steel Heat-exchanger and Condenser Tubes ASTM A199 10.3~426 x 1.0~36 T5, T22
Seamless Medium-carbon Steel Boiler and Superheater Tubes ASTM A210 10.3~426 x 1.0~36 A1, C
Seamless Ferritic and Austenitic Alloy Steel Boiler, Superheater and Heat-exchanger Tubes ASTM A213 10.3~426 x 1.0~36 T5, T9, T11, T12, T22, T91
Seamless Carbon and Alloy Steel for Mechanical Tubing ASTM A333 1/4"~42" x SCH20~XXS Gr1, Gr3, Gr6
Seamless and Welded Carbon Steel Pipes and Alloy Steel Pipes for Low Temperature Use ASTM A334 1/4"~4" x SCH20~SCH80 Gr1, Gr6
Seamless Cold-drawn Carbon Steel Feedwater Heater Tubes ASTM A556 10.3~426 x 1.0~36 A2, B2

Steel typically is considered to be carbon steel when the proportions of other trace elements in it do not exceed certain percentages.

Standars for Tubing and Casing, Line Pipes

Tubing and casing strings are the main parts of the well construction.

API 5L
API Spec 5L
is the American Petroleum Institute specification API 5L covers seamless and welded steel line pipe.
API Spec 5CT
API Spec 5CT
Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes.
GS/ DIN
Product name Executive standard Dimension (mm) Steel code/ Steel grade
Seamless Steel Tubes for Elevated Temperature DIN 17175 10~762 x 1.0~120 St35.8,St45.8, 10CrMo910, 15Mo3, 13CrMo44, STPL340, STB410, STB510, WB36
Seamless Steel Tubes DIN 1629 13.5~762 x 1.8~120 St37.0, St44.0, St52.0
Seamless Precision Steel Tube DIN 2391 4.0~60.0 x 0.5~8 St35, St45, St52
Seamless Steel Tubes DIN 2440 13.5~165.1 x 1.8~4.85 St33.2


Carbon steelspecification, Standard and identification

Carbon steel pipe tubing is used to transport fluids and gases in a variety of pneumatic, hydraulic, and process applications.

ASTM/ ASME- Standards for pipes
ASTM A53
Standard Spec. for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
ASTM A106 / A106M - 11
Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service
ASTM A179 Standarts
specification for Seamless Cold-Drawn Low-Carbon Steel Heat-Exchanger and Condenser Tubes
Carbon Steel Chemical composition
Steel Grade Standard Number Type Chemical composition Other
C Si S P Mn Cr Ni Mo Other ób ós δ5 HB
20 GB/T699 Bar 0.17-0.23 0.17-0.37 0.035 0.035 0.35-0.65 0.25 0.3 Cu:0.25 410 245 25 156 ψ%:55
20 GB3087 Pipe 0.17-0.23 0.17-0.37 0.035 0.035 0.35-0.65 0.25 0.3 Cu:0.25 410-550 245 20
20 GB/T8163 Pipe 0.17-0.23 0.17-0.37 0.035 0.035 0.35-0.65 0.25 0.3 Cu:0.25 410-550 245 20
20 GB9948 Pipe 0.17-0.24 0.17-0.37 0.035 0.035 0.35-0.65 0.25 0.25 Cu:0.25 410-550 245 21 Akv J:39
20 GB711 Plate 0.17-0.24 0.17-0.37 0.04 0.035 0.35-0.65 0.25 0.25 Cu:0.25 410 245 28
20G GB5310 Pipe 0.17-0.24 0.17-0.37 0.03 0.03 0.35-0.65 0.25 0.25 0.15 Cu:0.2;V:0.08 410-550 245 24 Akv J:35
20G GB6479 Pipe 0.17-0.24 0.17-0.37 0.035 0.035 0.35-0.65 410-550 245 24 ak J/cm2:49
20g GB713 Plate 0.2 0.15-0.3 0.035 0.035 0.5-0.9 400-530 245 26 Akv J:27;aku J/cm2:29
20R GB6654 Plate 0.2 0.15-0.3 0.03 0.035 0.4-0.9 400-520 245 25 Akv J:31
Q235A GB3724 Plate 0.14-0.22 0.3 0.05 0.045 0.3-0.65 375-500 235 26
Q235B GB3724 Plate 0.12-0.2 0.3 0.045 0.045 0.3-0.7 375-500 235 26 Akv J:27

Carbon steel pipe cooling method varies with the material. For most kinds of steel use natural cooling to meet the requirements.

Carbon steel pipe is the most commonly and widely used in the gas project field.
The large diameter coated steel pipes are widely used in tap water, natural gas, petroleum, chemical, pharmaceutical, telecommunications, electricity, large diameter steel marine engineering field generally less than the outer diameter of the tubes 89 are collectively referred to as small-diameter steel pipe.

Carbon steel tube mechanical properties is generated in the carbon steel smelting defect smelting and casting process, such as segregation, non-metallic inclusions, porosity, shrinkage and cracks.

Carbon steel pipe anti-rust oil: it is with a high corrosion resistance and adhesion,which does not contain harmful substances such as formaldehyde, benzene, heavy metals, environmental protection and the operator's physical and mental health.

Density is calculated by dividing the mass by the volume. The density of carbon steel is approximately 7.85 g/cm3 (0.284 lb/in3).

Improving the performance of the steel is two ways, First, adjusting the chemical composition of the steel alloying; the other is the heat treatment, heat treatment and shaping deformation combination of approaches. In the field of modern industrial technology, heat treatment to improve the performance of the steel still occupy a dominant position.

Inner diameter of seamless steel pipe is more than 6.0mm and wall thickness is less than 13mm annealed seamless steel pipe material, which can be used W-B75 Webster Hardness test with very fast, easy, suitable for rapid non-destructive of the seamless steel pipe material qualified inspection.

Low carbon steel is a type of metal that has an alloying element made up of a relatively low amount of carbon. Typically, it has a carbon content that ranges between 0.05% and 0.30% and a manganese content that falls between 0.40 and 1.5%. Low carbon steel is one of the most common types of steel used for general purposes, in part because it is often less expensive than other types of steel.

Carbon steel pipe rusting

Carbon steel pipe anti-rust oil: it is with a high corrosion resistance and adhesion,which does not contain harmful substances such as formaldehyde, benzene, heavy metals, environmental protection and the operator's physical and mental health.

Brinell hardness (HB) with a certain diameter of the steel balls or tungsten carbide balls, pressed into the pattern surface of a predetermined test force (F), after the predetermined hold time after drop test force, the diameter of the measurement sample surface indentation (L).

Steel is an alloy that mostly contains iron. But its properties can be changed to suit specific requirements by adding certain other elements.

Encountered hole problems are very common in the welding process, welding materials drying, corrosion of the base metal and welding consumables, welding process is not stable enough oil and impurities and to protect the poor will be varying degrees of blowholes.

The strip is into the welded pipe unit and by the multi-channel roll rolling, gradually rolled strip steel, formed with an opening gap round tube, adjust the amount of reduction squeeze rollers, so that the weld gap control for carbon steel pipe in 1 ~ 3mm, and to weld ends flush. If the gap is too large and will result in reduced proximity effect, eddy current lack of heat, poor weld joint between grain yield incomplete fusion or cracking.

Delivery standard length of carbon steel pipe, also known as user requirements length or the length of the contract, there are four provisions in the existing standards

Carbon steel internal defects is generated in the carbon steel smelting defect smelting and casting process, such as segregation, non-metallic inclusions, porosity, shrinkage and cracks.

Carbon steel tube mechanical properties is generated in the carbon steel smelting defect smelting and casting process, such as segregation, non-metallic inclusions, porosity, shrinkage and cracks.

Carbon steel defect is caused by the equipment, processes and operations in carbon steel smelting and rolling (forging) process, including scarring, cracks, residual shrinkage, layered, white point, segregation, non-metallic inclusions, such as osteoporosis and banded.

Related carbon steel products:
Carbon steel flanges
Carbon Steel Flanges
that is, the main material is carbon steel flange or end flange connectors. It contains carbon steel flange, known as carbon steel flange.
Carbon steel stub end
Carbon steel stub end
The stub ends are provided with a standard weld bevel and can be available in squared, flanged, victaulic and threaded ends.
ASTM A335 P22 is the part of ASTM A335, the pipe shall be suitable for bending, flanging, and similar forming operations, and for fusion welding.
Carbon steel caps
are used for connecting pipes of different diameters and find wide applications in various chemicals, construction industries.


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.
How to calculate a steel pipe and tube theoretic weight
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.
 
Condition on delivery:
Term Symbol Explanation
Cold-finished/hard
(cold-finished as-drawn)
BK No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft
(lightly cold-worked)
BKW After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed GBK After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized NBK The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.



About Sunny Steel

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