Ss321 Stainless Steel DN80/3" Metal Bellows Expansion Joint Compensator

• Temperature Classification: Medium Temperature Piping
• MPa Classfication: Medium Pressure Piping
• Material: Stainless Steel
• Standard: ASTM, GB, API, DIN, JIS
• Diameter: 273mm
• Medium: Fluids With Solid Particle
• Model NO.: DN80 3′′
• Cross-Section Shape: Round
• Connection Type: Welding
• Transport Package: Wooden Case
• Specification: DN80. NPS 3"
• Trademark: XQ
• Origin: Cangzhou
• HS Code: 7307290000
• Production Capacity: 100 Pieces/Day

Product Description

The corrugated pipe refers to a tubular elastic sensing element connected by a foldable corrugated sheet along the folding direction. Bellows are widely used in instruments and meters. They are mainly used as measuring elements of pressure measuring instruments to convert pressure into displacement or force. The wall of corrugated pipe is thin, and the sensitivity is high. The measurement range is tens of Pa to tens of MPa. Its open end is fixed, the sealing end is in a free state, and the auxiliary coil spring or reed is used to increase the elasticity. When working, the pipe stretches along the length direction under the action of internal pressure, causing the movable end to produce displacement that is related to the pressure. The movable end drives the pointer to directly indicate the pressure. Bellows are often combined with displacement sensors to form a pressure sensor whose output is electricity, and sometimes they are also used as isolation elements. Since the expansion of the bellows requires a large volume change, its response speed is lower than that of the Bourdon tube. Bellows are suitable for measuring low pressure.
The corrugated pipe mainly includes metal corrugated pipe, corrugated expansion joint, corrugated heat exchange pipe, membrane capsule, metal hose, etc. The metal corrugated pipe is mainly used to compensate the thermal deformation, shock absorption, and absorption of pipeline settlement deformation, and is widely used in petrochemical, instrument, aerospace, chemical, electric power, cement, metallurgy and other industries. Corrugated pipes made of plastic and other materials play an irreplaceable role in media transmission, power threading, machine tools, household appliances and other fields.

Bellows: A pressure measuring elastic element in pressure measuring instruments. It is a cylindrical thin-walled corrugated shell with multiple transverse corrugations. The bellows is elastic and can produce displacement under the action of pressure, axial force, transverse force or bending moment. Bellows are widely used in instruments and meters. They are mainly used as measuring elements of pressure measuring instruments to convert pressure into displacement or force. The wall of corrugated pipe is thin, and the sensitivity is high. The measurement range is tens of Pa to tens of MPa. In addition, the bellows can also be used as a sealing isolation element to separate two kinds of media or prevent harmful fluid from entering the measuring part of the equipment. It can also be used as a compensation element to compensate the temperature error of the instrument by using its volume variability. Sometimes it is also used as the elastic joint of two parts. The corrugated pipe can be divided into metal corrugated pipe and non-metallic corrugated pipe according to the composition materials; It can be divided into single-layer and multi-layer according to structure. Single layer corrugated pipe is widely used. The multi-layer corrugated pipe has high strength, good durability and low stress, and is used in important measurement. The corrugated pipe is generally made of bronze, brass, stainless steel, monel alloy and Inconel alloy.