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GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping

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GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping

MOQ:	1 Tons
Price:	800-1000 USD/Tons
Standard Packaging:	In bundles or in wooden boxes.
Delivery Period:	20-30days upon products
Payment Method:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Capacity:	60000 Ton/Tons per Year

Details Information

Product Description

Detail Information

Place of Origin

Zhejiang/China

Brand Name

TORICH

Certification

ISO9001, ISO14001, TS16949

Model Number

GB/T 18984

Technique:

Cold Drawn,ERW,Hot Rolled,Cold Rolled

Application:

Low-Temperature-Service

Standard:

ASTM,GB,DIN,API,BS

Alloy Or Not:

Non-alloy,Is Alloy

Thickness:

2 - 120 Mm

Section Shape:

Rectangular/ Square/ Round

Surface Treatment:

Customerized

Grade:

16MnDG; 10MnDG; 09DG; 09Mn2VDG

Grade Group:

10#-45#,16Mn

Special Pipe:

Precision Seamless Steel Tube

Secondary Or Not:

Non-secondary

Outer Diameter(round):

20 - 480 Mm

Length:

1-12m/as Customers' Requests

Shape:

Round Shape,Round/Square/Rectangular

Product Description

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 0

GB/T 18984 Seamless Steel Tubes for Low-Temperature-Service Piping

GB/T 18984 seamless steel tubes are designed for low-temperature pressure vessel piping and low-temperature heat exchanger piping, covering service temperature grades from -45°C to -196°C. They are manufactured by hot-finished or cold-finished seamless processes, with controlled heat treatment and low-temperature impact toughness verification to reduce brittle-fracture risk in cryogenic and refrigerated piping systems.

Specifications

Item	Description
Material	Carbon steel / low-alloy low-temperature steel
Standard	GB/T 18984
Main Grades	16MnDG, 10MnDG, 09DG, 09Mn2VDG, 06Ni3MoDG
Outside Diameter	Common range: 6–630 mm; customized sizes available according to project drawings
Wall Thickness	According to GB/T 17395 or customer-specified schedule/thickness
Length	1–12 m, customized; common fixed lengths include 5.8 m, 6 m, 11.8 m, 12 m
Tolerance Range	According to GB/T 17395 or agreed purchase specification
Straightness	Controlled for pressure piping fabrication; project-specific tolerance available
Surface Condition	Bare, oiled, anti-rust coated, black painted, or customized
Heat Treatment	Normalized, normalized + tempered, or other controlled heat treatment depending on grade and order requirement
Manufacturing Method	Hot-finished or cold-finished seamless tube
Inspection	Chemical analysis, tensile test, impact test, flattening/flaring/bending test, hydrostatic or NDT, dimensional and surface inspection

Key Features

Feature	Technical Value
Low-temperature service range	Applicable to -45°C to -196°C low-temperature piping and heat exchanger service under GB/T 18984
Impact-toughness grade selection	16MnDG / 10MnDG / 09DG for -45°C; 09Mn2VDG for -70°C; 06Ni3MoDG for -100°C typical low-temperature impact applications
Strength range	16MnDG tensile strength 490–665 MPa; 09Mn2VDG tensile strength ≥450 MPa; 06Ni3MoDG tensile strength ≥455 MPa
Seamless structure	No longitudinal weld seam, reducing weld-related discontinuity risk in pressure piping
Nickel/Mo alloy option	06Ni3MoDG contains Ni and Mo for improved low-temperature toughness compared with plain carbon-manganese grades
Controlled documentation	Test reports can include heat number, chemical composition, mechanical properties, heat treatment condition, impact test temperature, NDT/hydrostatic test results

Our Advantages

Buyer Concern	Our Solution
Impact toughness must match the design minimum temperature. For low-temperature systems, a Charpy impact test at the wrong temperature is not equivalent to the project design condition.	We confirm the required design temperature before production and match the grade accordingly: 16MnDG/10MnDG/09DG for -45°C class, 09Mn2VDG for -70°C class, and 06Ni3MoDG for deeper low-temperature service. Impact test temperature and values can be shown on the MTC.
Heat treatment condition affects low-temperature toughness. Incorrect or missing heat treatment records are a common rejection point in pressure-pipe procurement.	We supply tubes in normalized or controlled heat-treated condition as required by grade and order. Heat treatment batch, furnace record, and mechanical test results can be matched to heat number for traceability.
Traceability and inspection documents are critical for pressure equipment projects. EN 10204 3.1/3.2 documentation is often requested for international procurement.	We provide heat-number traceability, chemical and mechanical test data, dimensional inspection, surface inspection, and NDT/hydrostatic test records. EN 10204 3.1 or third-party inspection can be arranged when specified in the purchase order.

Executive Standards

Standard System	Relevant Standard	Brief Description
GB	GB/T 18984	Seamless steel tubes for low-temperature-service piping
ASTM / ASME	ASTM A333 / ASME SA333	Seamless and welded carbon/alloy steel pipe for low-temperature service
ASTM	ASTM A334	Seamless and welded carbon/alloy steel tubes for low-temperature service
EN	EN 10216-4	Seamless steel tubes for pressure purposes with specified low-temperature properties
JIS	JIS G3460	Steel tubes for low-temperature service
JIS	JIS G3464	Steel heat exchanger tubes for low-temperature service
ISO	ISO 9329-3	Seamless steel tubes for pressure purposes, low-temperature-related application reference

Application Field

Cryogenic liquid nitrogen vaporizer piping — GB/T 18984 seamless steel tubes can be used for low-temperature piping sections in liquid nitrogen vaporizer systems where impact toughness, pressure resistance, and stable performance under sub-zero operating conditions are required.

Chemical Composition

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	2.50–3.50*	0.20–0.35*	≤0.05

Mechanical Properties

Grade	Tensile Strength Rm MPa	Yield Strength MPa	Elongation A %	Typical Impact Temperature
16MnDG	490–665	≥325 for S ≤16 mm; ≥315 for S >16 mm	≥30	-45°C
10MnDG	≥400	≥240	≥35	-45°C
09DG	≥385	≥210	≥35	-45°C
09Mn2VDG	≥450	≥300	≥30	-70°C
06Ni3MoDG	≥455	≥250	≥30	-100°C

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 1

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 2

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 4

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 6

TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and

trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and

credibility among domestic and foreign customers.

The company's production plant covers an area of over 10,000 square meters, with an annual production

capacity of 50,000 tons of materials and a comprehensive trading and warehousing capacity of 100,000 tons, which can satisfy customers' personalized needs for raw materials in terms of diversity and timeliness.

The group holds shares in more than ten domestic production entities, whose main products include

seamless steel pipes ( carbon steel and stainless steel), welded pipes ( carbon steel and stainless steel), pipe fittings ( carbon steel and stainless steel), titanium (titanium tubes, titanium rods, titanium cakes, titanium plates, etc.), aluminum (aluminum tubes, aluminum rods, aluminum die casting, aluminum casting, CNC machining), and CNC deep processing of metal materials such as tubes, rods, and casting parts.

Over the past 30 years, the company has been gradually developing new technologies and materials to meet

the growing needs of customers and various diversified needs, exporting to more than 56 countries and still

increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Tags:

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precision seamless pipe,

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GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping

MOQ:	1 Tons
Price:	800-1000 USD/Tons
Standard Packaging:	In bundles or in wooden boxes.
Delivery Period:	20-30days upon products
Payment Method:	L/C, D/A, D/P, T/T, Western Union, MoneyGram
Supply Capacity:	60000 Ton/Tons per Year

Detail Information

Product Description

Detail Information

Place of Origin

Zhejiang/China

Brand Name

TORICH

Certification

ISO9001, ISO14001, TS16949

Model Number

GB/T 18984

Technique:

Cold Drawn,ERW,Hot Rolled,Cold Rolled

Application:

Low-Temperature-Service

Standard:

ASTM,GB,DIN,API,BS

Alloy Or Not:

Non-alloy,Is Alloy

Thickness:

2 - 120 Mm

Section Shape:

Rectangular/ Square/ Round

Surface Treatment:

Customerized

Grade:

16MnDG; 10MnDG; 09DG; 09Mn2VDG

Grade Group:

10#-45#,16Mn

Special Pipe:

Precision Seamless Steel Tube

Secondary Or Not:

Non-secondary

Outer Diameter(round):

20 - 480 Mm

Length:

1-12m/as Customers' Requests

Shape:

Round Shape,Round/Square/Rectangular

Minimum Order Quantity:

1 Tons

Price:

800-1000 USD/Tons

Packaging Details:

In bundles or in wooden boxes.

Delivery Time:

20-30days upon products

Payment Terms:

L/C, D/A, D/P, T/T, Western Union, MoneyGram

Supply Ability:

60000 Ton/Tons per Year

Product Description

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 0

GB/T 18984 Seamless Steel Tubes for Low-Temperature-Service Piping

Specifications

Item	Description
Material	Carbon steel / low-alloy low-temperature steel
Standard	GB/T 18984
Main Grades	16MnDG, 10MnDG, 09DG, 09Mn2VDG, 06Ni3MoDG
Outside Diameter	Common range: 6–630 mm; customized sizes available according to project drawings
Wall Thickness	According to GB/T 17395 or customer-specified schedule/thickness
Length	1–12 m, customized; common fixed lengths include 5.8 m, 6 m, 11.8 m, 12 m
Tolerance Range	According to GB/T 17395 or agreed purchase specification
Straightness	Controlled for pressure piping fabrication; project-specific tolerance available
Surface Condition	Bare, oiled, anti-rust coated, black painted, or customized
Heat Treatment	Normalized, normalized + tempered, or other controlled heat treatment depending on grade and order requirement
Manufacturing Method	Hot-finished or cold-finished seamless tube
Inspection	Chemical analysis, tensile test, impact test, flattening/flaring/bending test, hydrostatic or NDT, dimensional and surface inspection

Key Features

Feature	Technical Value
Low-temperature service range	Applicable to -45°C to -196°C low-temperature piping and heat exchanger service under GB/T 18984
Impact-toughness grade selection	16MnDG / 10MnDG / 09DG for -45°C; 09Mn2VDG for -70°C; 06Ni3MoDG for -100°C typical low-temperature impact applications
Strength range	16MnDG tensile strength 490–665 MPa; 09Mn2VDG tensile strength ≥450 MPa; 06Ni3MoDG tensile strength ≥455 MPa
Seamless structure	No longitudinal weld seam, reducing weld-related discontinuity risk in pressure piping
Nickel/Mo alloy option	06Ni3MoDG contains Ni and Mo for improved low-temperature toughness compared with plain carbon-manganese grades
Controlled documentation	Test reports can include heat number, chemical composition, mechanical properties, heat treatment condition, impact test temperature, NDT/hydrostatic test results

Our Advantages

Buyer Concern	Our Solution
Impact toughness must match the design minimum temperature. For low-temperature systems, a Charpy impact test at the wrong temperature is not equivalent to the project design condition.	We confirm the required design temperature before production and match the grade accordingly: 16MnDG/10MnDG/09DG for -45°C class, 09Mn2VDG for -70°C class, and 06Ni3MoDG for deeper low-temperature service. Impact test temperature and values can be shown on the MTC.
Heat treatment condition affects low-temperature toughness. Incorrect or missing heat treatment records are a common rejection point in pressure-pipe procurement.	We supply tubes in normalized or controlled heat-treated condition as required by grade and order. Heat treatment batch, furnace record, and mechanical test results can be matched to heat number for traceability.
Traceability and inspection documents are critical for pressure equipment projects. EN 10204 3.1/3.2 documentation is often requested for international procurement.	We provide heat-number traceability, chemical and mechanical test data, dimensional inspection, surface inspection, and NDT/hydrostatic test records. EN 10204 3.1 or third-party inspection can be arranged when specified in the purchase order.

Executive Standards

Standard System	Relevant Standard	Brief Description
GB	GB/T 18984	Seamless steel tubes for low-temperature-service piping
ASTM / ASME	ASTM A333 / ASME SA333	Seamless and welded carbon/alloy steel pipe for low-temperature service
ASTM	ASTM A334	Seamless and welded carbon/alloy steel tubes for low-temperature service
EN	EN 10216-4	Seamless steel tubes for pressure purposes with specified low-temperature properties
JIS	JIS G3460	Steel tubes for low-temperature service
JIS	JIS G3464	Steel heat exchanger tubes for low-temperature service
ISO	ISO 9329-3	Seamless steel tubes for pressure purposes, low-temperature-related application reference

Application Field

Chemical Composition

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	2.50–3.50*	0.20–0.35*	≤0.05

Mechanical Properties

Grade	Tensile Strength Rm MPa	Yield Strength MPa	Elongation A %	Typical Impact Temperature
16MnDG	490–665	≥325 for S ≤16 mm; ≥315 for S >16 mm	≥30	-45°C
10MnDG	≥400	≥240	≥35	-45°C
09DG	≥385	≥210	≥35	-45°C
09Mn2VDG	≥450	≥300	≥30	-70°C
06Ni3MoDG	≥455	≥250	≥30	-100°C

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 1

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 2

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 4

GB/T 18984 Seamless Steel Tubes For Low-Temperature-Service Piping 6

TORICH Group, an one-stop service provider of raw materials engaged in raw material production, R&D and

trade, has 30+ years of experience in the market, exported to 56 +countries, and won good reputation and

credibility among domestic and foreign customers.

The company's production plant covers an area of over 10,000 square meters, with an annual production

The group holds shares in more than ten domestic production entities, whose main products include

Over the past 30 years, the company has been gradually developing new technologies and materials to meet

the growing needs of customers and various diversified needs, exporting to more than 56 countries and still

increasing the number of exporting countries, aiming to help customers to solve the demand for raw materials, and to facilitate one-stop purchasing for customers.

Q: Are you trading company or manufacturer ?

A: manufacturer,also can do trading.

Q: How long is your delivery time?

A: Generally speaking,it is 10-15 days if the goods are in stock,or it is 30-40 days if the goods are not in stock, it is according to quantity.

Q: Do you provide samples? is it free or extra ?

A: Yes, we could offer the sample for free charge but need pay the cost of freight.

Q: What is your terms of payment ?

A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,balance before shippment.

If you have another question, pls feel free to contact with me.

Tags: