High-toughness Carbon Steel Pipe For Cold-environment Piping
Astm a333 grade 6 seamless pipe offers unmatched corrosion resistance and toughness for low-temperature applications, ideal for boiler pipeline protection and industrial piping.
High-toughness Carbon Steel Pipe For Cold-environment Piping
Astm a333 grade 6 seamless pipe offers unmatched corrosion resistance and toughness for low-temperature applications, ideal for boiler pipeline protection and industrial piping.
ASTM A333 Grade 6 Seamless Pipe for Low-Temperature is a premium carbon steel pipe engineered for exceptional performance in low-temperature environments, delivering superior corrosion resistance and notch toughness at temperatures as low as -45°C (-50°F). Compliant with ASTM A333/ASME SA333 standards, this seamless pipe is perfect for boiler pipeline protection, oil and gas pipelines, LNG facilities, and other industrial piping systems requiring reliability in extreme cold conditions.
Manufactured through a seamless process, the ASTM A333 Grade 6 Seamless Pipe ensures a uniform, weld-free structure that enhances durability under high-pressure and low-temperature conditions. Its composition, featuring low carbon (≤0.30%), controlled manganese (0.29-1.06%), and silicon (≥0.10%), provides excellent weldability and formability, making it ideal for bending, flanging, and fusion welding in complex piping configurations. The pipe undergoes normalization at a minimum of 815°C (1500°F) or alternative heat treatments to optimize mechanical properties, ensuring resistance to brittle fracture in cold climates.
With a minimum tensile strength of 415 MPa and a yield strength of 240 MPa, this low-temperature pipe is designed for robust performance in transporting fluids and gases in sub-zero environments. Its corrosion resistance makes it suitable for handling corrosive media in petrochemical plants, subsea applications, and refrigerated systems, while its notch toughness, verified through Charpy V-Notch impact testing at -45°C, ensures reliability in cold-climate pipelines. Available in sizes from 1/8” to 48” (DN 6 to DN 1200), with wall thicknesses ranging from SCH 40 to SCH 160, and lengths up to 18 meters or customized, it meets diverse project requirements.
The ASTM A333 Grade 6 Seamless Pipe undergoes rigorous testing, including hydrostatic, nondestructive electric, and impact tests, to ensure compliance with ASTM standards. Optional surface treatments like 3LPE, FBE, or galvanizing enhance its corrosion resistance, while plain, beveled, or threaded ends facilitate seamless installation. Compared to welded pipes or other grades like ASTM A106, this seamless pipe offers superior toughness and reliability for low-temperature service, making it a top choice for engineers in demanding applications.
This low-temperature seamless pipe addresses critical challenges such as pipeline wear, corrosion, and thermal stress in high-throughput industrial systems. Its seamless construction and optimized material properties make it a reliable solution for industrial piping in extreme cold environments. Whether used in boiler systems, LNG plants, or oil and gas pipelines, the ASTM A333 Grade 6 Seamless Pipe for Low-Temperature delivers exceptional performance, safety, and longevity, ensuring operational efficiency in cold-environment applications.
Performs reliably at -45°C, ideal for cold-climate piping systems.
Resists corrosion in harsh petrochemical and industrial environments.
Weld-free structure ensures reliability in high-pressure applications.
Ideal for bending, flanging, and welding in complex piping designs.
Long lifespan minimizes maintenance and replacement costs.
| Specification | ASTM A333 Grade 6 | ASTM A106 Grade B | ASTM A335 P11 | ASTM A333 Grade 1 |
|---|---|---|---|---|
| Application | Low-temperature service (-45°C) | High-temperature service (up to 400°C) | High-temperature service (up to 600°C) | Low-temperature service (-50°C) |
| Material Type | Carbon Steel | Carbon Steel | Chrome-Moly Alloy Steel | Carbon Steel |
| Tensile Strength (MPa) | 415 (min) | 415 (min) | 415 (min) | 380 (min) |
| Yield Strength (MPa) | 240 (min) | 240 (min) | 205 (min) | 205 (min) |
| Impact Testing | Mandatory at -45°C | Not required | Not required | Mandatory at -50°C |
| Corrosion Resistance | Good (enhanced with coatings) | Moderate | Excellent (high Cr content) | Good |
| Key Advantage | Superior low-temperature toughness | High-temperature performance | High-temperature and corrosion resistance | Low-temperature toughness |
| Typical Use | Oil/gas, LNG, petrochemical | Boilers, refineries | Power plants, refineries | Cold storage, cryogenic systems |
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.30 |
| Manganese (Mn) | 0.29–1.06 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Silicon (Si) | ≥ 0.10 |
| Nickel (Ni) | ≤ 0.40 |
| Chromium (Cr) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.30 |
| Property | Value |
|---|---|
| Tensile Strength | ≥ 415 MPa |
| Yield Strength | ≥ 240 MPa |
| Elongation | ≥ 30 % |
| Impact Toughness | ≥ 27 J @ –100 °C |
| Hardness | ≤ 241 HBW |
| Standard | Pipes | Buttweld Fittings | Forged Steel Fittings | Valves | Bolts and Nuts |
|---|---|---|---|---|---|
| Low Temp Carbon Steel | A333 GR6 | A420 WPL6 | ASTM A350 LF2 | A352 LCB | A320 Gr L7 / A194 Gr 7 |
The equivalent grade to ASTM A333 GR6 is often EN 10216-4 P265NL or DIN 17173 TT St 35N. These grades share similar mechanical properties and are suitable for low-temperature service applications.
ASTM A333
Low temperature pipe refers to pipes specifically designed to withstand and operate effectively in environments with low temperatures, typically below 0°C (32°F).
These pipes are often used in industries such as oil and gas, petrochemicals, and refrigeration, where fluids need to be transported or stored at low temperatures. They are constructed from materials that can maintain their mechanical properties and structural integrity even in extremely cold conditions, ensuring the safe and efficient transportation of fluids. Additionally, low temperature pipes are insulated to prevent heat transfer and maintain the desired temperature of the fluid being transported.
Compared with austenitic stainless steel and duplex stainless steel, there are many comprehensive advantages of ferrite alloy steels for low temperature service, such as higher strength, better rigidity and lower expansion coefificient. There is not only better stability but aslo higher heat transfer efficiency. Tube & pipe for low-temperature service can be widely used in low temperature engineering. ASTM/ASME A/SA-333 Grades allow for cold temperature service to minus 150 degrees F. Material is always provided in the normalized condition at a minimum and Charpy Impact tested to a specific temperature range to assure compliance with the required service temperature.
Exceptional performance at temperatures down to -45°C with superior notch toughness and impact resistance.
Fine-grain structure with uniform carbide dispersion prevents brittle fracture in cryogenic conditions.
Economical alternative to exotic materials while providing reliable low-temperature performance.
Good weldability using conventional processes with minimal post-weld heat treatment requirements.
Precise control of chemical composition using electric arc furnaces with advanced ladle metallurgy techniques. Vacuum degassing reduces hydrogen content and eliminates inclusions.
Seamless pipes manufactured using hot piercing and rolling. Welded pipes produced using ERW or SAW processes with strict welding parameter controls.
Controlled heat treatment including normalizing at 815°C (1500°F), quench and temper, or stress relief to achieve optimal microstructure and properties.
Comprehensive testing including chemical analysis, mechanical testing, Charpy V-notch impact testing, hydrostatic testing, and non-destructive examination.
ASTM A333 Grade 6 Seamless Pipe for Low-Temperature is widely used in industries requiring excellent high-temperature, high-pressure, and corrosion-resistant performance.
Used in boilers, superheaters, and steam lines in thermal and nuclear power plants.
Ideal for hydrocarbon processing, ethylene cracking, and heat exchanger units.
Used in LNG pipelines, storage tanks, and vaporization equipment for cold media.
Ensures excellent thermal conductivity and corrosion resistance in cyclic operations.
Handles high-pressure oil and gas in extraction, refining, and transportation systems.
Resists acidic and corrosive environments in reactors, scrubbers, and distillation units.
