Product Description

Produced by seamless or welded process from low temperature carbon steel or alloy steel, designed to maintain high toughness and impact resistance at sub-zero temperatures down to -196°C. Features fine grain structure, excellent low-temperature impact properties, good weldability, and compliance with stringent NDE requirements. Available materials: 16MnDG, 09MnNiD, 09MnNiDG, A333 Grade 1/3/6/8, A350 LF2 (fittings), 3.5% Ni, 5% Ni, 9% Ni, A671/A672 low temperature. Outer diameter: seamless 10mm – 711mm; welded 100mm – 1200mm. Wall thickness: 2.0mm – 50mm. Length: 3m – 12m (custom). Surface finish: black (as-rolled), pickled & oiled, or coated. End finish: plain, beveled, or threaded. Impact test temperatures: -30°C, -45°C, -60°C, -101°C, or -196°C (depending on grade). 100% ultrasonic testing (UT), hydrostatic testing, and impact testing per standard. Meets ASTM A333, A334, A671, A672, EN 10216-3/4, JIS G3460, or GB/T 18984 standards. Custom lengths, impact test temperatures, and welded with PWHT available.

Parameter

Product Name	Low Temperature Steel Pipe (Seamless / Welded)
Material Grades	16MnDG, 09MnNiD, 09MnNiDG, ASTM A333 Gr1/3/6/8, A350 LF2, 3.5% Ni, 5% Ni, 9% Ni, A671/A672
Pipe Type	Seamless (OD 10–711mm) or Welded (ERW/LSAW, OD 100–1200mm)
Outer Diameter (OD)	10mm – 1200mm (seamless up to 711mm, welded up to 1200mm)
Wall Thickness	2.0mm – 50mm (depending on OD and grade)
Length	3m – 12m (custom up to 18m)
Impact Test Temperature	-30°C, -45°C, -60°C, -101°C, -196°C (grade dependent)
Impact Energy (Minimum)	Typically ≥27J or ≥34J per standard (longitudinal)
Tensile Strength	415 – 690 MPa (grade dependent)
Yield Strength	240 – 450 MPa (grade dependent)
Elongation	≥20% (grade dependent)
Grain Structure	Fine grain, fully killed (Al or Si deoxidized)
Surface Finish	Black (as-rolled), pickled & oiled, or coated
End Finish	Plain, beveled (for welding), threaded (with coupling)
NDT Inspection	100% Ultrasonic Testing (UT), Hydrostatic test, Optional: Radiography (RT), Magnetic particle (MT)
Heat Treatment	Normalized, normalized & tempered, quenched & tempered (depending on grade)
Standards	ASTM A333/A334/A671/A672, EN 10216-3/4, JIS G3460, GB/T 18984
Applications	Cryogenic pipelines, LNG plants, low-temperature pressure vessels, petrochemical, gas processing
Custom Options	Impact test temperature, PWHT (post-weld heat treatment), special NDT, custom length

Application description

Widely used in cryogenic pipelines, LNG (liquefied natural gas) terminals, ethylene plants, air separation units, low-temperature pressure vessels, and petrochemical processing. Also suitable for gas processing facilities, refrigeration systems, and Arctic or sub-zero environment projects where high toughness and impact resistance at temperatures down to -196°C are critical.

Production description

Steel billet (or coil) is heated and rolled (seamless) or formed and welded (welded). Pipe undergoes normalizing or Q&T heat treatment to refine grain structure. Low temperature impact testing and 100% UT are performed. Ends beveled for welding.

Shipping Packaging

For export, low temperature steel pipes are capped with plastic end protectors, wrapped with VCI paper and moisture-proof polyethylene, packed on ISPM-15 pallets or steel skids, secured with steel straps, and fitted with edge protectors. Labels include grade, impact test temperature, dimensions, and heat number for safe sea freight.

Why Choose Us?

1.Factory Strength:Direct manufacturer with integrated seamless/welded pipe production lines, normalizing and Q&T heat treatment furnaces, and in-house NDT facilities, producing low temperature steel pipes to ASTM A333, EN 10216, and GB/T 18984 standards.

2.Quality Assurance:Strict control of chemical composition, fine grain structure, and impact properties at target temperatures (-30°C to -196°C); 100% ultrasonic testing (UT), hydrostatic test, and low-temperature Charpy V-notch testing; compliant with ASTM A333/A671, EN 10216-3/4.

3.Certifications & Reports:Mill test certificates (MTC) with each shipment; third-party inspections (SGS, BV, Intertek) and impact test reports at specified temperatures available upon request.

4.Customization & Service:Wide grade range (16MnDG, 09MnNiD, A333 Gr1/3/6/8, 9% Ni, A671), diameters 10–1200mm, wall 2–50mm, custom lengths, beveled ends, and post-weld heat treatment (PWHT) with fast lead times.

5.Export Packaging:Plastic end caps + VCI paper + moisture-proof polyethylene + ISPM-15 pallets/steel skids + steel strapping + edge protectors + clear labeling for safe sea freight and protection against corrosion.

FAQ

1. How should low temperature steel pipes be stored before use?

Store in dry, clean area on wooden pallets, keep original moisture-proof wrapping and end caps intact. Avoid impact or scratching, especially at low temperatures where material is less ductile. For long-term storage, maintain warehouse temperature above -10°C and humidity below 60%.

2. What is the minimum service temperature for different low temperature steel grades?

ASTM A333 Gr1: -30°C; Gr3: -50°C; Gr6: -45°C; Gr8: -101°C; 9% Ni steel: -196°C. Always verify impact test requirements with project specifications. We provide full impact test reports for each heat number.

3. Can low temperature steel pipes be welded, and what precautions are needed?

Yes, use low-hydrogen welding processes (SMAW, GTAW, GMAW) with matching filler metals (e.g., ENiCrFe-9 for 9% Ni, E7018-C2L for A333 Gr6). Preheat and interpass temperature control, post-weld heat treatment (PWHT) for thicker walls, and avoid rapid cooling. Impact testing of weldments is recommended.

CLIENT FEEDBACK

Has a professional foreign trade team and a well-established export service system. We have built long-term and stable cooperation relationships with customers from Southeast Asia, the Middle East, Africa, South America, and other regions.

CUSTOMER VISIT

We sincerely welcome global partners to contact us for mutual growth. With high-quality products and professional service, we look forward to working with you to create a prosperous future together.

Customer visit