Guide you to understand the diversity of stainless steel seamless elbows
The diversity of stainless steel seamless elbows is mainly reflected in the following aspects:
One Angle classification
Standard angles: 45 °, 90 °, 180 ° are the most common specifications and are suitable for most pipeline turning needs.
Non standard angles: Special angle elbows such as 60 ° and 30 ° can be customized for production to meet specific engineering layout requirements.
II Material Type
Carbon steel elbow: made of Q235, 20 # and other materials, economical and practical, suitable for normal temperature and pressure environment.
Stainless steel elbow:
304/316 stainless steel: Strong corrosion resistance, widely used in the food and chemical industries.
310S/316L stainless steel: with outstanding high temperature resistance (below 800 ℃), suitable for electric furnace tubes and petrochemical high-temperature pipelines.
Alloy steel elbow: Made of materials such as 16Mn, it combines strength and heat resistance and is commonly used in power plants and high-pressure pipelines.
III Differences in production processes
Push made elbow: formed through hot pushing technology, with uniform wall thickness, suitable for high-pressure scenarios.
Stamping elbow: Cold stamping process has high production efficiency, but the wall thickness tolerance is relatively large.
Welded elbow: made of rolled steel plates, with lower cost but slightly weaker pressure bearing capacity.
4 connection method
Butt welding connection: The same material welding wire (such as H1Cr26Ni21 for 310S stainless steel) needs to be matched, and solution treatment is required after welding.
Flange connection: easy to disassemble and maintain, but slightly less sealed than butt welding.
Threaded connection: commonly used for small-diameter low-pressure pipelines, with quick installation.
5、 Special application scenarios
Low temperature elbow: maintains toughness at -160 ℃ environment, used for LNG transport ships.
Sanitary grade elbow: polished inner wall Ra ≤ 0.8 μ m, in compliance with GMP standards.
The current mainstream standards include ASME B16.9 (American Standard) and GB/T 12459 (National Standard), and when selecting, it is necessary to comprehensively consider the fluid medium, working temperature, and pressure rating. For example, the chemical industry prioritizes the use of 316L material to resist chloride ion corrosion, while thermal power boilers require 310S stainless steel to ensure stability below 800 ℃.
Guide you to understand the diversity of stainless steel seamless elbows
The diversity of stainless steel seamless elbows is mainly reflected in the following aspects:
One Angle classification
Standard angles: 45 °, 90 °, 180 ° are the most common specifications and are suitable for most pipeline turning needs.
Non standard angles: Special angle elbows such as 60 ° and 30 ° can be customized for production to meet specific engineering layout requirements.
II Material Type
Carbon steel elbow: made of Q235, 20 # and other materials, economical and practical, suitable for normal temperature and pressure environment.
Stainless steel elbow:
304/316 stainless steel: Strong corrosion resistance, widely used in the food and chemical industries.
310S/316L stainless steel: with outstanding high temperature resistance (below 800 ℃), suitable for electric furnace tubes and petrochemical high-temperature pipelines.
Alloy steel elbow: Made of materials such as 16Mn, it combines strength and heat resistance and is commonly used in power plants and high-pressure pipelines.
III Differences in production processes
Push made elbow: formed through hot pushing technology, with uniform wall thickness, suitable for high-pressure scenarios.
Stamping elbow: Cold stamping process has high production efficiency, but the wall thickness tolerance is relatively large.
Welded elbow: made of rolled steel plates, with lower cost but slightly weaker pressure bearing capacity.
4 connection method
Butt welding connection: The same material welding wire (such as H1Cr26Ni21 for 310S stainless steel) needs to be matched, and solution treatment is required after welding.
Flange connection: easy to disassemble and maintain, but slightly less sealed than butt welding.
Threaded connection: commonly used for small-diameter low-pressure pipelines, with quick installation.
5、 Special application scenarios
Low temperature elbow: maintains toughness at -160 ℃ environment, used for LNG transport ships.
Sanitary grade elbow: polished inner wall Ra ≤ 0.8 μ m, in compliance with GMP standards.
The current mainstream standards include ASME B16.9 (American Standard) and GB/T 12459 (National Standard), and when selecting, it is necessary to comprehensively consider the fluid medium, working temperature, and pressure rating. For example, the chemical industry prioritizes the use of 316L material to resist chloride ion corrosion, while thermal power boilers require 310S stainless steel to ensure stability below 800 ℃.