Steel Pipe for Low Or High Temperature

What is Low temperature pipe?
Low temperature pipe refers to pipes specifically designed to withstand and operate effectively in environments with low temperatures, typically below 0°C (32°F). These pipes are often used in industries such as oil and gas, petrochemicals, and refrigeration, where fluids need to be transported or stored at low temperatures. They are constructed from materials that can maintain their mechanical properties and structural integrity even in extremely cold conditions, ensuring the safe and efficient transportation of fluids. Additionally, low temperature pipes are insulated to prevent heat transfer and maintain the desired temperature of the fluid being transported.

Standard: GB/T 18984-2016, ASTM/ASME A333/SA333
Main steel grades: 16MnDG, 10MnDG, 09DG, ASTM A333 Gr.1, ASTM A333 Gr.6
Application: Seamless steel pipes for low-temperature pressure vessels and seamless steel pipes for low-temperature heat exchangers used in the range of -45°C to -100°C.

Main steel products and application

When using low-temperature steel pipes, you need to pay attention to the following points:

Product selection and storage:
When selecting, make sure you understand the specifications, dimensions and quality standards of the product to meet your specific use needs. The storage and transportation environment of steel pipes should be dry and clean to avoid corrosion and damage.
Installation and connection:
When installing low-temperature steel pipes, correct installation methods should be followed to ensure that they are installed securely to avoid problems such as leakage. During the installation process, relevant engineering specifications and standards should be followed to ensure that the steel pipes are firmly connected and sealed. Cleaning inside the pipeline is very important to avoid impurities causing damage to the steel pipe.
Welding and heat input:
When welding, appropriate welding methods and heat input should be selected to avoid the formation of coarse structures in the weld metal and near-seam areas. For low-temperature steels, excessive welding line energy may lead to a decrease in joint toughness, so the welding current, arc voltage and welding speed should be strictly controlled during the welding process.
Regular inspection and maintenance:
When using low-temperature seamless steel pipes, regular inspections, including pressure tests, leak tests, etc., should be carried out to ensure stable performance. Pay attention to the use of steel pipes, and deal with them in time if any abnormalities occur. In a humid environment, attention should be paid to anti-rust maintenance on the surface of steel pipes, and regular visual inspections of steel pipes should be carried out. If there is any rust, it should be dealt with in time.
Insulation measures:
In low-temperature environments, steel pipes are prone to problems such as leakage and frosting. Insulation measures for pipes should be strengthened to ensure stable operation of the pipes.

High-temperature alloy steel pipes are called chromium-molybdenum pipes.
High temperature steel pipes are basically divided into three types:
High temperature carbon steel pipe
High temperature alloy steel pipe
High temperature stainless steel pipe

High temperature carbon steel pipe
ASTM A179, A192, A210 specifications cover carbon steel seamless pipe for high temperature applications. These pipes are used in heat exchangers, condensers and high temperature materials shall comply with Specification A 530.
GB5310-2008 is suitable for manufacturing seamless pipes for steam boilers of high pressure and above and seamless pipes used as pipes.
ASTM A179/A179M – 90a Standard Specification for Seamless Cold Drawn Mild Steel Heat Exchanger and Condenser Tubes
ASTM A192/A192M Standard Specification for High-Pressure Seamless Carbon Steel Boiler Tubes
ASTM A210/ASME SA210 Standard Specification for Seamless Medium Carbon Steel Boiler and Superheater Tubes.

Chemical Compositions(%) of GB 5310

High Temperature Alloy Steel tube
ASTM A213, A209 specification covers Alloy Steel Seamless tube for high temperature service. These tube are suitable for bending and similar forming operations, and for fusion welding at high temperatures. High Temperature Alloy Steel tube are also considered as low Alloy Chrome Moly grades.

ASTM/ASME A/SA213 Gr. T2, T5, T5b, T5c, T11, T12, T17, T21, T22, T9, T91
ASTM/ASME A/SA335 Gr. P1, P2, P5, P11, P12, P22
EN10216-2 Gr. 10CrMo9-10,13CrMo4-5,EN10216-2,P195GH,P235GH,P265GH

High Temperature Stainless Steel tube
High temperature stainless steel tubing maintain their mechanical properties when exposed to elevated temperatures on either a short- or long-term basis.

High Pressure and Temperature Service Seamless Pipes are application for heating-pipelines, containers, coal-saving devices superheaters and reheaters of high temperature and high press boiler.

Available Sizes:
O.D.: from 3/4 to 20 inch
W.T.: 0.102 to 4inch (2.6 to 100 mm)
Length: max 16000mm

GNEE has passed ISO9001 international quality management system certification and obtained 8 quality system certifications including provincial enterprise credit certificate, enterprise credit certificate, quality service certificate, and integrity management demonstration unit. Can implement GB, ASTM, JIS, DIN and other standards.

Marking:
Pipes are supplied with marking according to standard and customer request.
Marking is paint on the ends of pipes.
The same data, as well as additional information per customer’s request, is indicated on the bundle’s tags.

Delivery:
Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
Weight of bundle – up to 5000 kg upon request of customer.
Each bundle is furnished with three tags.

 

 

 

 

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