Phosphor Bronze Bordon Tube

The Bourdon tube is a measuring element form of a pressure gauge, which can be installed on a tee, but there is also a shut-off valve between the impulse pipe and the pressure gauge. The most commonly used bourdon tube is type C, in addition, there are spiral type, type C combination, Fried Dough Twists type and other types. The material of the Boden tube is copper based or iron-based alloy. It has lower sensitivity compared to other pressure-sensitive components and is commonly used to measure larger pressures, often in combination with other elastic components. In 1852, E. Boden obtained the patent for the Boden tube. The Boden tube is still widely used in many instruments, especially for measuring pressure and force.

 

 

 

Product Name	Phosphor Bronze Bordon Tube
Customized Or not	Yes
Brand	HSMetal
Type	y40 y50 y60 y70 y100 y150
Size	Customized
Material	CuSn8,CuSn6,CuSn4 Or 304,316,316TI,Monel400
Pressure Resistance	0.06mpa-200mpa (MPa)
Application	Pressure gauges, etc

 

 

Continuous exercise caused by pressure changes can lead to fatigue failure. Minor defects on the surface of the pipe can expand and deepen, ultimately leading to pipe failure. Non metallic impurities, surface scars, carbon infiltration or decarburization, rough or corroded surfaces, traces of defects, and uneven wall thickness can all cause malfunctions. Special attention should be paid to the quality, process, and specifications required for various purposes of the raw material of the pipe. But some of these basic requirements are common to all instrument users. The steel used for recycling should be produced through a smelting furnace that can strictly control the purity. To prevent surface decarburization, especially for thin-walled pipes, as surface decarburization can reduce fatigue resistance. Recent research has found that using materials melted in vacuum to manufacture Boden tubes improves their fatigue resistance.

 

 

• Alloy Grade: Typically C51000 (Phosphor Bronze, 5% Sn) or C52100 (8% Sn), per UNS designations. The tin content increases strength and elasticity.
• Heat Treatment: The formed tube undergoes a stress-relief anneal to set its elastic shape and remove internal stresses from forming, ensuring stable performance.
• Accuracy Class: Gauges with phosphor bronze tubes are commonly found in Grade B (±1.6%) and Grade A (±1.0%) accuracy classes (per ASME B40.1). Higher grades (0.25% or 0.1%) typically require beryllium copper or special stainless steels.
• Pressure Ranges: Commonly used for low to medium pressure ranges (e.g., vacuum up to 1,000 psi / 70 bar), though specific designs can go higher.

 

 

The Bourdon tube is the core sensing element of mechanical pressure gauges. In a typical structure, a C-shaped bent Bourdon tube with an angle of about 250 degrees is commonly used to measure a pressure of about 60 bar. When higher pressure needs to be detected, a spiral or helical design of the Bourdon tube structure is usually used.

In practical applications, the Boden tube has certain limitations in overpressure protection, so it is often used in conjunction with chemical seals to isolate corrosive or viscous media under complex working conditions. The range coverage of the Bourdon tube pressure gauge is wide, extending from low pressure measurement of 0 to 0.6 bar to high pressure detection of 0 to 4000 bar. Its measurement accuracy varies depending on the level, ranging from 0.1% to 4.0%.

In addition, the elastic deformation characteristics of the Boden tube can be directly applied to the control field - when the deformation reaches the set threshold, it can drive the micro switch to open and close the control circuit. This mechanical pressure switch is suitable for automatic control of parameters such as air pressure, water pressure, oil pressure, liquid level, and flow rate, and plays an important role in industrial automation systems.

 

 

Q:What information should i confirm you when i send inquiry

A:Sometimes we need product specification like material standard or Grade, size, Qty, shipping port, Terms like FOB or CIF etc.

 

Q: How long of the delivery time?

A: Usually, the shipment can be delivery within 15-30days after the order confirmed.

 

Q: How about the payment items?

A: LC, T/T, PayPal, Western Union etc.

 

Q: Which country have you exported to?

A: Our main market is South America, Middle East, Africa and Europe. And have built long time relationship with Pakistan, US, Norway, Germany, Korea, Russia,Taiwan customers.And got continue orders from them every month.

 

Q: Can i visit your factory?

A: Sure! Welcome in any time.

 

Q: How about the MOQ?

A: Normally we dont have MOQ requirement, We always expect more opportunities with you. But for some special material or special size let's communicate the actual status.

 

Q: Can you support us in the applications?

A: It is our pleasure!

 

Q: Can you accept the inspection from a third party?

A: Yes. We have enough experience to cooperate with the inspection project.

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