GB/T18984 Low-Temperature Heat Exchanger Tubes

High-quality Tubes For Low-temperature Heat Exchangers And Piping

Gb/T 18984 seamless steel tubes, compliant with GB/T18984, are high-quality carbon and alloy steel tubes designed for low-temperature heat exchangers and piping systems, suitable for cryogenic applications from -45°c to -196°c.

GB/T18984 10MnDG 09DG 09Mn2VDG +6 More

GB/T18984 Low-Temperature Heat Exchanger Tubes

High-quality Tubes For Low-temperature Heat Exchangers And Piping

GB/T18984 10MnDG 09DG 09Mn2VDG +6 More

GB/T 18984 seamless steel tubes, compliant with the Chinese national standard GB/T 18984-2016, are high-quality carbon and alloy steel tubes designed for low-temperature heat exchangers and piping systems. These tubes are engineered for extreme cold environments, operating effectively at temperatures ranging from -45°C to -196°C, making them ideal for cryogenic applications in industries such as petrochemical, natural gas, and refrigeration.

Manufactured through hot-rolling or cold-drawing processes, GB/T 18984 seamless tubes are available in outer diameters from 4 mm to 1200 mm and wall thicknesses from 0.3 mm to 200 mm, with general lengths of 4–12 meters or customized per project requirements. Common steel grades include 16MnDG, 10MnDG, 09DG, 09Mn2VDG, 06Ni3MoDG, and 06Ni9DG, with 16MnDG being widely used for its excellent low-temperature toughness and strength. These tubes are suitable for low-temperature pressure vessel piping and heat exchanger systems, ensuring safe fluid transport in cryogenic conditions.

GB/T 18984 tubes undergo rigorous testing, including hydraulic, tensile, impact (at low temperatures), ultrasonic, and eddy current tests, to meet the stringent requirements of GB/T 18984-2016. Surface treatments such as shot blasting, varnishing, or anti-corrosion coatings enhance durability in harsh low-temperature environments. The seamless construction ensures uniform strength, leak-proof performance, and resistance to brittle fracture, critical for maintaining safety in cryogenic systems.

Compared to international standards like ASTM A333/A333M, JIS G3460, and JIS G3464, GB/T 18984 tubes are optimized for low-temperature applications, with 16MnDG aligning closely with ASTM A333 Grade 6 for similar cryogenic uses. These tubes offer a cost-effective, high-performance solution for industries requiring reliable performance in extreme cold, such as liquefied natural gas (LNG) transportation and refrigeration systems. They are widely produced in China and exported globally, particularly to regions with significant cryogenic infrastructure.

GB/T 18984 seamless steel tubes are the preferred choice for engineers and manufacturers in cryogenic heat exchanger systems, low-temperature piping, and refrigeration units, ensuring safety and efficiency in extreme cold environments.

Key Benefits

Low-Temperature Toughness

Designed to perform reliably at temperatures as low as -196°C.

Cost-Effective

Durable seamless design reduces maintenance costs.

Versatile Applications

Ideal for cryogenic heat exchangers and LNG piping.

Corrosion Resistance

Coatings enhance durability in cryogenic environments.

Rigorous Testing

Hydraulic, ultrasonic, and impact tests ensure quality.

Seamless Design

Ensures uniform strength and leak-proof performance.

Technical Specifications

Chemical Composition of GB/T18984 Low-Temperature Heat Exchanger Tubes
Grade	C (%)	Si (%)	Mn (%)	P (max) (%)	S (max) (%)	Ni (%)	Mo (%)	V (%)
16MnDG	0.12-0.20	0.20-0.55	1.20-1.60	0.025	0.025	—	—	—
10MnDG	≤0.13	0.17-0.37	≤1.35	0.025	0.025	—	—	≤0.07
09DG	≤0.12	0.17-0.37	≤0.95	0.025	0.025	—	—	≤0.07
09Mn2VDG	≤0.12	0.17-0.37	≤1.85	0.025	0.025	—	—	≤0.12
06Ni3MoDG	≤0.08	0.17-0.37	≤0.85	0.025	0.025	2.5-3.7	0.15-0.30	≤0.05

Mechanical Properties of GB/T18984 Low-Temperature Heat Exchanger Tubes
Grade	Tensile Strength (Rm/MPa)	Lower Yield Strength (Rcl/MPa)		Elongation (A/%)
Grade	Tensile Strength (Rm/MPa)	W.T.≤16mm	W.T.>16mm	Elongation (A/%)
16MnDG	490-665	≥325	≥315	≥30
10MnDG	≥400	≥240	—	≥35
09DG	≥385	≥210	—	≥35
09Mn2VDG	≥450	≥300	—	≥30
06Ni3MoDG	≥455	≥250	—	≥30

Comparison of GB/T 18984 16MnDG with Other Standards
Feature	GB/T 18984 16MnDG	ASTM A333 Grade 6	JIS G3460 STPL450
Material Type	Low-Alloy Steel (Seamless)	Carbon Steel (Seamless)	Carbon Steel (Seamless)
Temperature Range	-45°C to -196°C	-45°C to -195°C	-45°C to -100°C
Pressure Range	High pressure	High pressure	Moderate pressure
Corrosion Resistance	Good (With coatings)	Good	Moderate
Applications	Cryogenic piping, LNG transport	Low-temperature piping	Low-temperature systems
Tensile Strength (MPa)	500–630	≥415	≥450
Yield Strength (MPa)	≥325	≥240	≥245
Key Advantage	Optimized for cryogenic toughness	High low-temperature strength	Precision for low-temperature systems

Heat Treatment Processes for GB/T18984 Low-Temperature Heat Exchanger Tubes
Grade	Heat Treatment
10#	Normalization: Normalizing temperature 880℃-940℃
20#	Normalization: Normalizing temperature 880℃-940℃
12CrMo	Normalized and tempered: Normalizing temperature 900℃-960℃, tempering temperature 670℃-730℃
15CrMo	Normalized and tempered: Normalizing temperature 900℃-960℃, tempering temperature 680℃-730℃
12Cr5MoI	Full annealing or isothermal annealing

Steel Pipe Applications and Specification Parameters
Application	OD Range	WT Range	Length Range	Standards
Cracking Furnaces	10-426 mm	1.5-50 mm	5-12 m	GB/T 9948, ASTM A335, EN 10216-2
Heat Exchangers	1/2" – 12"	SCH 40, 80, 160	Up to 12 m	ASTM A213, A312, GB/T 9948
Transfer Lines	1/8" – 24"	SCH 40, 80, XXS	Up to 12 m	GB/T 9948, ASTM A335, GOST 9941
Refinery Piping	10-323 mm	1.5-40 mm	5-12 m	GB/T 9948, ASTM A106, EN 10216-2

You Can Also Search GB/T 18984 Seamless Steel Tubes by

A curated list of long-tail keywords for GB/T 18984 seamless steel tubes, covering specifications, applications, and material properties, presented in a multi-column layout.

Standards and Specifications

• GB/T 18984-2016 seamless steel tube specifications
• GB/T 18984 low-temperature tube standards
• GB/T 18984 carbon steel tube properties
• Chinese standard seamless cryogenic tube tolerances

Applications

• GB/T 18984 tubes for cryogenic heat exchangers
• GB/T 18984 seamless tubes for LNG pipelines
• GB/T 18984 tubes for refrigeration systems
• Chinese standard tubes for low-temperature piping

Material and Grades

• GB/T 18984 16MnDG material properties
• GB/T 18984 tube grades
• GB seamless cryogenic tube corrosion resistance

Manufacturing and Testing

• GB/T 18984 seamless tube manufacturing process
• GB/T 18984 tubes hydraulic testing
• GB seamless tube quality control

Procurement and Suppliers

• GB/T 18984 seamless steel tubes suppliers
• GB/T 18984 seamless tube distributors
• Chinese standard cryogenic tubes price

Dimensions and Customization

• GB/T 18984 seamless tube dimensions
• GB/T 18984 tube tolerances
• GB seamless tubes custom lengths

Note: GB/T 18984-2016 covers seamless steel tubes for low-temperature heat exchangers and piping. For detailed specifications, refer to the GB/T 18984-2016 standard or contact a certified supplier.

GB/T 18984 seamless steel tubes, under GB/T 18984-2016, are high-quality carbon and alloy steel tubes designed for low-temperature heat exchangers and piping systems, suitable for cryogenic applications from -45°C to -196°C.

Common grades include 16MnDG, 10MnDG, 09DG, 09Mn2VDG, 06Ni3MoDG, and 06Ni9DG, with 16MnDG widely used for its excellent low-temperature toughness and strength in cryogenic applications.

Includes hydraulic, tensile, impact (at low temperatures), ultrasonic, and eddy current tests to ensure quality and compliance with GB/T 18984-2016 standards for cryogenic applications.

Used in cryogenic heat exchangers, LNG pipelines, refrigeration systems, petrochemical processing, natural gas transport, and low-temperature pressure vessel piping systems.

Common equivalents include:
- 16MnDG ≈ ASTM A333 Grade 6
- 09DG ≈ ASTM A333 Grade 1
- 06Ni3MoDG ≈ ASTM A333 Grade 8

Grade 16MnDG is a low-alloy steel seamless tube designed for low-temperature heat exchangers and piping, offering excellent toughness and strength for cryogenic applications down to -196°C.

For 16MnDG:
- Chemical Composition: C 0.12–0.20%; Si 0.20–0.55%; Mn 0.70–1.00%; P ≤0.025%; S ≤0.015%
- Mechanical Properties: Yield Strength ≥325 MPa; Tensile Strength 500–630 MPa; Elongation ≥21%; Impact Test (-45°C) ≥34 J

Grade 16MnDG seamless tubes are used in cryogenic heat exchangers, LNG pipelines, refrigeration systems, and low-temperature pressure vessel piping due to their superior low-temperature toughness.

16MnDG offers higher manganese content (0.70–1.00%) and tensile strength (500–630 MPa) compared to 10MnDG (Mn 0.60–0.90%, Tensile 400–550 MPa), providing superior toughness and strength for more demanding cryogenic applications.

16MnDG seamless tubes are manufactured via hot-rolling or cold-drawing, delivered in heat-treated condition (e.g., normalizing or tempering), with optional shot blasting or anti-corrosion coatings for enhanced durability in cryogenic environments.

Industrial Applications

GB/T 18984 seamless steel tubes are critical for low-temperature heat exchangers, cryogenic piping, and refrigeration systems, offering superior toughness and reliability.

Cryogenic Heat Exchangers

Used in heat exchangers for cryogenic fluid processing.

LNG Pipelines

Transports liquefied natural gas at low temperatures.

Refrigeration Systems

Supports cooling in industrial refrigeration units.

Petrochemical Processing

Used in low-temperature chemical processing.

Natural Gas Transport

Ensures safe LNG and gas transport in pipelines.

Low-Temperature Piping

Used in cryogenic pressure vessel piping systems.

GB/T18984 Low-Temperature Heat Exchanger Tubes

GB/T18984 Low-Temperature Heat Exchanger Tubes