GB/T 18984 Cold Drawn Preservative Seamless Steel Tubes For Low-Temperature-Service Piping
GB/T 18984 Cold Drawn Preservative Seamless Steel Tubes For Low-Temperature-Service Piping
Material and Specification
The GB/T 18984 standard pertains to cold-drawn preservative seamless steel tubes designed for low-temperature-service piping. These tubes are specifically formulated to handle the challenges presented by low-temperature environments, ensuring maximum performance and reliability.
The material used in the production of these seamless steel tubes is of superior quality, adhering to the strict standards set out by the GB/T 18984 specification. These tubes are manufactured using a cold drawing process, which imparts exceptional dimensional accuracy and a smooth surface finish.
Key Features
The cold-drawn preservative seamless steel tubes defined by GB/T 18984 possess several key features that make them suitable for low-temperature-service piping applications. These features include:
- Resilience: These tubes offer excellent resilience and toughness, allowing them to withstand extremely low temperatures without sacrificing their structural integrity.
- Corrosion resistance: The seamless steel tubes are designed to resist corrosion effectively, ensuring long-lasting performance and durability in arduous conditions.
- Superior thermal conductivity: The tubes exhibit excellent thermal conductivity, promoting efficient heat transfer in low-temperature environments.
- Easy installation: The seamless construction allows for easy installation, reducing downtime and labor costs during the piping process.
Chemical Composition
The chemical composition of the GB/T 18984 cold-drawn preservative seamless steel tubes is as follows:
| Element | Chemical Composition (% by weight) |
|---|---|
| Carbon (C) | 0.12 max |
| Silicon (Si) | 0.20 - 0.35 |
| Manganese (Mn) | 0.40 - 0.90 |
| Phosphorus (P) | 0.035 max |
| Sulfur (S) | 0.035 max |
| Nickel (Ni) | 0.30 max |
| Chromium (Cr) | 0.30 max |
| Copper (Cu) | 0.25 max |
| Vanadium (V) | 0.03 max |
| Aluminum (Al) | 0.02 max |
Mechanical Properties
The mechanical properties of the GB/T 18984 cold-drawn preservative seamless steel tubes are as follows:
| Property | Mechanical Requirements |
|---|---|
| Tensile Strength (MPa) | min 490 |
| Yield Strength (MPa) | min 325 |
| Elongation (%) | min 22 |
| Impact Toughness (J) | min 27 at -50°C |
Steel Grade
The GB/T 18984 standard covers several steel grades suitable for low-temperature-service piping. These grades include:
- 16MnDG
- 10MnDG
- 09DG
- 09Mn2VDG
- 06Ni3MoDG
- 06Ni9DG
Application
The GB/T 18984 cold-drawn preservative seamless steel tubes find extensive applications in low-temperature-service piping systems across various industries. These tubes are commonly used in the transport of liquids and gases in environments where low temperatures might compromise the integrity of standard piping materials. Some notable application areas include:
- Cryogenic storage and transportation systems
- LNG (Liquefied Natural Gas) terminals
- Petrochemical refineries
- Power plants
- Pharmaceutical and food processing industries
Possible Alternative Grades
While the GB/T 18984 standard provides a comprehensive range of grades ensuring reliability and performance, in some instances, alternative grades may be suitable for specific applications. Some possible alternative grades to consider include:
- ASTM A333 Grade 6: A widely used grade for low-temperature applications in the United States, characterized by excellent impact toughness and low-temperature resistance.
- DIN 17173 Grade TT St35N: A German standard grade known for its excellent low-temperature properties and resistance to corrosion.
- JIS G3460 Grade STPL380: A Japanese industrial standard grade suitable for low-temperature piping, known for its high thermal conductivity and durability.
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Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
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