seamless pipe

Sunny Steel offers an extensive range of seamless precision steel tubes.

ASTM Seamless pipe

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 OD seamless pipes

Big O.D. Steel seamless pipes

Big OD seamless pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries.

Alloy & tubes offered by us are seamless and corrosion resistance.

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, mechanical, construction.

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.

ASME Piping Standards


German Institute for Standardization (DIN)

DIN (Deutsches Institut für Normung ) standards for topics varying from agriculture to vehicle manufacturing in Germany.

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.


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.

  • ASME SA333 Gr.6 Seamless Steel 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
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
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