The double ferrule fitting features reliable connection, high pressure resistance, temperature resistance, excellent sealing and repeatability, easy installation and maintenance, and safe and reliable operation.

The working principle of the double ferrule fitting involves inserting the steel pipe into the ferrule, tightening the ferrule nut, pressing against the ferrule, and cutting into the pipe to achieve a seal. It does not require welding when connecting to steel pipes, which is beneficial for fire prevention, explosion prevention, and high-altitude operations, while also eliminating the drawbacks of improper welding.
Therefore, it is an advanced connecting component in the pipeline systems of automatic control devices in industries such as refining, chemical, petroleum, natural gas, food, pharmaceuticals, and instrumentation. It is suitable for connecting pipelines carrying oil, gas, water, and other media.

Manufacturing standard: GB3733.1～3765-83

Nominal pressure: 25MPa, 40MPa

Applicable temperature: ≤450℃

Applicable media: Non-corrosive or corrosive media such as oil, water, and gas

Pipe matching: Seamless steel pipes with ordinary precision, Φ4～Φ42

Taper pipe threads: ZG, G, NPT, etc.

Overview of ferrule fittings:
The ferrule-type pipe fitting consists of three parts: the fitting body, the ferrule, and the nut. When the ferrule and nut are slipped onto the steel pipe and inserted into the fitting body, tightening the nut causes the outer side of the ferrule's front end to align with the conical surface of the fitting body, while the inner edge uniformly bites into the seamless steel pipe, forming an effective seal.