Seamless steel pipe (SMLS) is formed by drawing a solid billet over a piercing rod to create the hollow shell, without welding or seam. It is suitable for bending and flanging. The most advantage is increasing the ability of withstanding higher pressure. So it is widely used for boiler and pressure vessel, automotive area, oil well, and equipment components.
Seamless steel pipe can be cut, threaded or grooved. And the coating method includes black / red lacquer, varnish painting, hot dip galvanization, etc.
DIN/EN Steel Pipe
DIN (Deutsches Institut für Normung ) standards for topics varying from agriculture to vehicle manufacturing in Germany.
JIS seamless pipe
JIS seamless pipe is steel pipe that has been created by JIS and meets certain performance requirements.
Carbon Steel Pipes
Carbon steel pipe is widely used in the world of manufacturing as they have high end durability.
Big O.D. Steel seamless pipes
Big OD seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries.
ASTM A179/A179M, ASME SA179/SA179M is the standard applicable to Seamless cold drawn low carbon steel heat exchanger and condenser tubes.
PQF Mill
PQF(Premium Quality Finishing Mill) continuous rolling is the most advanced technology for producing hot rolled seamless steel pipe of modern industry.
It creates high quality seamless steel pipe efficiently, even for high alloy pipe and light wall pipe.
Size Range: 2″(60.3mm) to 20″(508mm)
Delivery Condition: As roll/ Normalized
Cold Drawn Mill
Cold drawn mill is used for producing small size pipe. There are several times of cold forming process, so yield strength and tensile strength values increase, while elongation and toughness values decrease. A heat treatment must to be applied for each cold forming operation.
Cold rolled Mill
As another type of cold forming process, cold rolled mill also works at room temperature to stretch large size pipe to required small size.
Comparing cold drawn mill ,it takes pilger mill with fewer cold forming processes and lower productivity, but come out the pie in much precise size and shinning apperance.
Alloy steel pipes & tubes offered by us are seamless and corrosion resistance.
Key Specifications/Special Features of Seamless pipes and tubes
ASTM Standards for steel pipes
ASTM’s steel standards are instrumental in classifying, evaluating, and specifying the material, chemical, mechanical, and metallurgical properties of the different types of steels, which are primarily used in the production of mechanical components, industrial parts, and construction elements, as well as other accessories related to them.
- Which difference betweem ASTM A53 and ASTM A106
- ASTM Standards for steel pipes
- ASTM Standard of Structural Tubing
- ASTM standard for Mechanical tubing
- ASTM Standard for Boilers tube, Super heater tubes
- Impact test requirements for ASTM A500 Gr.C
ASME Piping Standards
- Internal defect control of small-diameter high-pressure boiler pipe
- The Story Behind Nominal Pipe Size
- Welded Steel Pipe VS Seamless Steel Pipe
- ASTM A106 Standard Specification
- Pressure and Temperature Ratings of ASTM A106 Grade B Carbon Steel Pipes
- What is ASTM Steel pipe?
German Institute for Standardization (DIN)
DIN (Deutsches Institut für Normung ) standards for topics varying from agriculture to vehicle manufacturing in Germany.
- DIN2605 EN10253 BS1965 steel pipes size dimensions
- Description of DIN EN 10216 and 10217
- Description of DIN EN 10210 and DIN EN 10219
- The Effect of Welding on High Carbon Steel
Type:seamless steel pipe:1/2″-24″; ERW steel pipe:1/2″-48″
What is JIS?
The Japanese Industrial Standard (JIS) was formed by the Japanese Standards Association in 1945 in Chiyoda-ku, Tokyo. The standards developed by the organization apply to a wide variety of industrial services and technologies such as automobiles, metallurgy, ships and medical equipment.
- Dimensions for JIS and KS Standards
- JIS, Japanese Industrial Standards for steel
- Tolerance of JIS seamless pipe
- JIS ERW steel pipes
- JIS G 3101 SS400
- Marine steel pipes
Higher carbon steels
which can successfully undergo heat-treatment have a carbon content in the range of 0.30–1.70% by weight.
Ultra-high carbon steel
Ultra-high carbon steel contains between 1 and 2 percent carbon.
Medium Carbon Steel
Medium Carbon Steel contains between 0.25 -0.7% carbon and used for machine components requiring high strength and good fatigue resistance.
ASTM A350 LF2 Carbon Steel
ASTM A350-LF2 Temperature range (-50 to 800 deg. F) Where corrosion resistance is not important.
The Effect of Welding on High Carbon Steel
High-carbon steels are decidedly more difficult to weld than low- or medium-carbon steels. However, a variety of measures are available to ensure a strong weld.
Difference between forged steel and carbon steel?
Forged steel has been subject to high temperature and pressure forcing the crystal structure closer together and increasing tensile strength (used in high pressure gas compressors).
Difference between carbon steel and Killed carbon steel
There is a difference between regular carbon steel and killed carbon steel.
How to use steel tubing and use carbon steel pipe
If you are interested in using carbon steel pipe, there are all different types of reasons why you will want to use this.
Killed Carbon Steel
Killed Carbon Steel is a process of deoxidation that is performed during the steel making process.
Designation of Carbon Steel
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values.
Carbon Steel Coding
The AISI and the SAE have designed a four digit code to assign to all carbon and alloy steels to show its standard wrought steel composition.
Carbon steel is steel in which the main interstitial alloying constituent is carbon in the range of 0.12–2.0%.
Which difference betweem astm a53 and astm a106
Pressure (psig) and temperature (deg F) ratings of ASTM A106 Grade B carbon steel pipes – temperatures ranging 100 oF – 750 oF
High Carbon Steel Properties
High Carbon Steel is one of the most important construction metals in the world.
The usage of Carbon steel pipe
Carbon steel pipe is widely used in the world of manufacturing as they have high end durability.
ASTM A333 Grade 6 alloy pipe shall be made by the seamless or welding process with the addition of no filler metal in the welding operation.
Available Specification
API SPEC 5CT – Specification 5CT/ISO 11960, Specification for Casing and Tubing, Eighth Edition, Petroleum and natural gas industries-Steel pipes for use as casing or tubing for wells.
| Product name | Executive standard | Dimension (mm) | Steel code/ Steel grade |
| Casting | API 5CT | 114~219 x 5.2~22.2 | J55, K55, N80, L80, P110 |
| Tubing | API 5CT | 48.3~114.3 x 3.2~16 | J55, K55, N80, L80, H40 |
API SPEC 5L -Specifies requirements for the manufacture of two product specification levels (PSL 1 and PSL 2) of seamless and welded steel pipes for use in pipeline transportation systems in the petroleum and natural gas industries.
| Product name | Executive standard | Dimension (mm) | Steel code/ Steel grade |
| Casting | API 5L | 10.3~1200 x1.0~120 | A, B, X42, X46, X52, X60, X70, X80, PSL1 / PSL2 |
ASTM / ASME – American Society for Testing and Materials / American Society of Mechanical Engineers
| 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 |
GS
|
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 / DIN 2391
|
13.5~762 x 1.8~120
|
St37.0, St44.0, St52.0, St52.3
|
|
Seamless Steel Tubes
|
DIN 2440
|
13.5~165.1 x 1.8~4.85
|
St33.2
|
|
Seamless Steel Pipes for Structural Purpose
|
DIN 2393
|
16~426 x 1.0~36
|
RSt34-2, RSt37-2, RSt44-2,St52
|
GS/ DIN– German Institute for Standardization, develops norms and standards as a service to industry, the state and society as a whole.
| 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 |
We can makes and markets cold-drawn and hot rolled seamless steel pipes and cold-drawn special-section seamless pipes which are widely applied in the industries of petrochemical, boiler, automobile, mechanica…