Haihao Group has recently completed the delivery of a diversified batch of seamless steel pipes to a customer in South Korea, supporting projects that require reliable performance under high pressure, low temperature, and sour service environments.
This shipment covers carbon steel, low-temperature steel, stainless steel, and nickel-alloy seamless pipes, produced in strict accordance with international standards and tailored to demanding operating conditions in the oil & gas and industrial sectors.
API 5L Grade B PSL2 and A312 UNS N08926 seamless steel pipes for pipeline projects
Overview of the Supplied Seamless Steel Pipes
API 5L Grade B PSL2 Seamless Pipes
Several sizes of API 5L Grade B PSL2 seamless steel pipes were supplied for pipeline and pressure service applications:
- Sizes from 3/4″ to 4″
- Wall thicknesses including SCH 40, SCH 80, and SCH 160
- Standard length: 6 meters per pipe
These pipes are widely used in oil and gas transmission systems, offering stable mechanical properties, good weldability, and consistent dimensional accuracy.
Sour Service Stainless Steel Pipes – UNS N08926
To meet corrosive media requirements, Haihao Group delivered ASTM A312 UNS N08926 seamless pipes for SOUR service:
- Sizes: 3/4″ and 2″
- Wall thickness: SCH 40S
- Designed for acidic and H₂S-containing environments
UNS N08926 is known for its excellent pitting and crevice corrosion resistance, making it a preferred material for severe sour service conditions.
Low-Temperature and Sour Service Carbon Steel Pipes
The shipment also included ASTM A333 Grade 6 seamless pipes, suitable for low-temperature and sour environments:
- Sizes: 3/4″ SCH 80 and 4″ SCH 40
- Verified performance at low temperatures
- Used in energy, gas processing, and cold-region installations
Sour Service Stainless Steel Pipes – TP316/316L
For enhanced corrosion resistance, ASTM A312 TP316/316L seamless pipes were supplied with strict chemical requirements:
- Size: 4″ × SCH 10S
- Sour service condition
- Minimum molybdenum content: 2.5%
- PREN ≥ 25.5
These properties ensure improved resistance to localized corrosion in aggressive service environments.
Manufacturing Standards and Quality Control
All seamless steel pipes were manufactured and inspected according to applicable standards, with attention to:
- Chemical composition control
- Dimensional and visual inspection
- Sour service material verification
- Clear marking and traceability
Each pipe was securely packed to protect the surface condition during international transportation to South Korea.
Typical Applications in the Korean Market
The supplied seamless steel pipes for sour service and high pressure are commonly used in:
- Oil and gas pipelines
- Refinery and petrochemical facilities
- Process and utility piping systems
- Low-temperature and corrosive service projects
Haihao Group – Trusted Seamless Steel Pipe Supplier
With extensive export experience in Asia and global markets, Haihao Group provides:
- API 5L PSL2 seamless steel pipes
- Sour service stainless steel seamless pipes
- Low-temperature carbon steel pipe solutions
- Stable supply, strict inspection, and professional logistics
Haihao Group remains committed to delivering reliable seamless steel pipe products that meet international standards and customer-specific requirements.
