Yuhong Group Co.,Ltd
Yuhong Holding Group Co.,LTD
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ASTM A270 TP304 Seamless Stainless Steel Sanitary Tubing NPT Thread End Tubing
NPT threads are designed to create a tight seal when connected to compatible fittings, reducing the risk of leaks in plumbing, gas, and hydraulic systems. Such connections can accommodate slight movements due to thermal expansion or contraction, helping to maintain the integrity of the system under varying temperatures.
ASTM A270 sanitary tubing constructed to be easy to clean and free of any crevices where bacteria can grow, ensuring hygienic transport of fluids. It often polished to a high sheen, these tubes meet stringent cleanliness standards, vital in food and pharmaceutical industries. Some clients require higher mechanical properties, they require non-annealed heat treatment. Non-annealed stainless steel typically has higher tensile and yield strength due to work hardening that occurs during processing, but it less suitable for applications requiring significant deformation or bending.
Equivalent Grade of ASTM A270 TP304 SS Tube
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS | ||
| BS | En | No | Name | ||||
| 304 | S30400 | 304S31 | 58E | 1.4301 | X5CrNi18-10 | 2332 | SUS 304 |
ASTM A270 TP304 SS Tube Chemical Composition
| Grade | C | Mn | Si | P | S | Cr | Mo | Ni | N | |
| 304 | min. | – | – | – | – | – | 18.0 | – | 8.0 | – |
| max. | 0.08 | 2.0 | 0.75 | 0.045 | 0.030 | 20.0 | 10.5 | 0.10 | ||
| Grade | Tensile Strength (MPa) min | Yield Strength 0.2% Proof (MPa) min | Elongation (% in 50mm) min | Hardness | |
| Rockwell B (HR B) max | Brinell (HB) max | ||||
| 304 | 515 | 205 | 40 | 92 | 201 |
1. Plain End: cut flat without any additional features. They are smooth and typically used for basic tube applications.
Characteristics:
Simple construction, easy to manufacture.
No threading or additional finish.
Applications:
Often used for applications where the tube is welded into place.
Commonly found in structural applications or as part of a pipe rack.
Used in situations where fluid transfer is not involved.
2. Beveled End: have an angled edge that facilitates welding. The angle allows for a better fit when joining two pieces of pipe.
Characteristics:
Edges are cut at an angle (usually 30-45 degrees).
Designed to assist in the welding process.
Helps to create a stronger joint by providing a larger weld area.
Applications:
Commonly used in welded joints in piping systems, especially for high-pressure applications.
Often found in the oil and gas industry, water transmission systems, and any application requiring strong, permanent connections.
3. Threaded End (NPT or Others): fitted with external threads that allow for connection to other piping components using threaded fittings.
Characteristics:
Available in various thread types, including NPT (National Pipe Thread).
Provides a means of easily connecting and disconnecting pipes without welding.
Applications:
Widely used in plumbing and HVAC applications for fluid and gas transfer.
Useful in scenarios where frequent disassembly and reassembly are needed.
Common in fire protection systems, industrial piping, and chemical processing systems.
Stainless steel 304 sanitatry tubing is commonly used in below industries:
Fluid Transfer: Ideal for transporting liquids and gases in pneumatic and hydraulic systems due to its resistance to corrosion.
Plumbing: Commonly used in plumbing systems for water supply lines and fittings, particularly in industrial and commercial settings.
Food and Beverage Industry: Suitable for sanitary applications where hygiene is paramount, often found in food processing or beverage production facilities.
Chemical Processing: Utilized in environments where harsh chemicals are present, thanks to stainless steel's durability and corrosion resistance.
Manufacturing Equipment: Can be part of machinery and equipment in various industries, connecting different components securely.
Marine Applications: Used in marine environments due to its ability to withstand corrosive saltwater conditions.
HVAC Systems: Employed in heating, ventilation, and air conditioning systems for efficient airflow or water movement.
