Seamless Alloy Steel Tube


We are manufacturer of Seamless Alloy Steel Tube and supply high quality Seamless Alloy Steel Tube in both large and small quantities worldwide and offer you the best prices in the market.


Specifications

Properties

The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes.

We have a team of experienced professionals with years of experience in manufacturing. (www.sunnysteel.com)


What Is Seamless Steel Pipe?


Seamless steel pipes, as one kind of the most important steel pipes, are often seen to be widely used in fluid transport, oil field, natural gas, constructions, shipbuilding, machinery, chemical industry, electricity industry etc.
There are mainly 2 types seamless steel pipes as per production technology: Hot Rolled Seamless Pipe & Cold Rolled Seamless Pipe

For hot rolled seamless pipe, the production process is: steel billet---heating---punching---three-roll cross rolling, continuous rolling –--detaching pipe---sizing or reducing---cooling---straightening- --hydrotest (NDT)- --marking---warehouse entry

Specification Range:
1 OD: 3''-24'' (73mm-610mm)
WT: SCH10-SCHXXS
2 Materials: 10#, 20#,45#, 20G,16Mn, GRB, Q345B, X42-56, ST44, ST52,S355 etc.
3 Standards: GB/T8162/8163/3087/5310, ASME B36 10, ASTM A106/A53, API 5L/5CT, DIN2448/1629, EN10210/10219
4 Testing: Eddy current, Hydrostatic, Ultrasonic, Intergranular corrosion etc.
5 Packing: in bundles with steel strips, seaworthy packing as per customer's requirements

For cold rolled seamless pipe, the production process is: steel billet---heating---punching---head making---annealing---cooper plating---cold drawing (cold rolling)---semi-finished pipes---heat treatment---straightening---hydrotest(NDT)---Marking---warehouse entry

1 Specification range:
OD: 1/8''-5'' (10.3mm-141.3mm)
WT: SCH10-SCHXXS
2 Materials: 10#, 20#,45#,16Mn, GRB, Q345B, X42-56, ST44, ST52 etc.
3 Standards: GB/T8162/8163/3087/5310, ASME B36 10, ASTM A106/A53, ASTM A179, API 5L/5CT, EN10210/10219
4 Testing: Eddy current, Hydrostatic, Ultrasonic, Intergranular corrosion etc.
5 Packing: in bundles with steel strips, seaworthy packing as per customer's requirements

The largest benefit to using seamless steel pipe is the increased pressure ratings. When steel pipe is rolled and welded, the weakest point in the pipe is the welded seam. A seamless steel pipe does not have a seam, so the tensile strength is uniform around the entire circumference of the pipe. Steel pipe has nominal pressure ratings that are based on the tensile strength of the alloy (mixture of metals) and the wall thickness of the pipe. Using seamless pipe is more expensive but allows for smaller wall thicknesses and pipe weight, which can affect design and costs.

Sunny Steel Enterprise Ltd. is a professional manufacturer & supplier of seamless steel pipes in China. With almost 15 years in this field, we are capable of providing customers seamless pipe with good quality and competitive price. Located in the center of steel pipes and pipe fittings, we can source any kind of steel pipes with Small Order, Complex Sizes in the earliest time.

DIN Seamless steel pipe



Our products for DIN/EN Standard has been listed as follows:



Steel Grade: St37.4, St44.4, St52.4

Application: Seamless Circular Tubes of Non. Alloy Steels With Very High Quality Requirements

Dimension Range: 10.2-660 mm


Steel Grade: St35, St45, St52

Application: Seamless Precision Steel Tubes

Dimension Range: 4-260 mm


Steel Grade: St33.2

Application: Steel Tubes Medium Weight Suitable for Screwing

Dimension Range: 10.2-165.1 mm


Steel Grade:St33.2

Application: Steel Tubes Heavy Weight for Suitable for Screwing

Dimension Range: 10.2-165.1 mm


Steel Grade: St 52.4

Application: Seamless Steel Tubes Subjected to Dynamic Loading-1 Hot Finished Tubes for Use in Fluid Power Systems, Rated for Pressures from 100 bar to 500 bar

Dimension Range: 21.3-355.6 mm


Steel Grade: St 37.4

Application: Seamless Steel Tubes Subjected to Dynamic Loading-2 Precision, Tubes for Use in Fluid Power Systems, Rated for Pressures from 100 bar to 500 bar

Dimension Range: 4.50 mm


Steel Grade: St35

Application: Steel Pipes for Water Pipelines

Dimension Range: DN80-500


Steel Grade: St35.8, S05.8,17Mn4,19Mn5, 15Mo3, 13CrMo910, 1OCrMo910, 14MoV63, X20CrMoV12l

Application: Seamless Circular Tubes Made From Steels with Elevated Temperatures

Dimension Range: 10.2-660 mm

Dimension tolerance

Table 1: Permissible Deviation in Outside Diameter in DIN 1630, 17173, 17175, 17179
Table 2: Permissible Deviation in Wall Thickness in DIN 1630, 17173, 17175, 17176, 17179
Table 3: Types of Length and Permissible Deviation in Length in DIN 1630, 17173, 17175, 17176, 17179
Table 4: Permissible Deviation in Outside Diameter in DIN 2391
Table 5: Types of Length and Permissible Deviation in Length in 2391

Table 6: Permissible Deviation in Outside Diameter in DIN 2440, 2441

Table 7: Permissible Deviation in Outside Diameter in DIN 17172

Table 8: Permissible Deviation in Outside Diameter in DIN 17176

Table 9: Permissible Deviation in Wall Thickness in DIN 28180

Recently seamless pipes

Seamless steel pipe


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