Ductile iron single range flange
Universal straight fittings, stepped fittings and flange adapters for cast iron, ductile iron, steel, uPVC and asbestos cement pipes.
Ductile iron pe pipe single rang
Working pressures may vary from 10 to 16 bar depending on the application. The flange design of the adaptors is suitable for various international variations like DN, BS and ANSI.
Ductile iron wide range flange a
Flange adaptor couplings provide an effective means for inserting a flange into a pipeline for connection to another flanged component or valve. These adaptors are suitable for use in potable water; non-potable water and wastewater pipelines.
WHITE BAND expansion joints
The main body of silicone rubber joints for food production enterprises is made of nylon cord as the reinforcing material, which is vulcanized under heating and pressure conditions. Food grade rubber joints are used in cold water,
Dual Card Pipe Connectors
Pipe repair clamp is a kind of pipe plugger for repairing pipes, also known as Hafjoint, the upper and lower parts are sealed with sealing strips and fastened as a whole by bolts and worms.

Double flange limit expansion joint with complete specifications and stable performance

Feb-23-15 Visits:95

In the double flange limit expansion joint, chromium is the element that strongly forms and stabilizes the iron body and narrows the austenite zone. In this regard, the commonly used double flange limit expansion joint is the one with the appropriate ratio of chromium and nickel.

As mentioned before, the precipitation of σ, χ phase not only significantly reduces the plasticity and toughness of the joint, but also reduces the corrosion resistance of the joint under some conditions. Therefore, it is difficult to obtain martensitic organization for high chromium (e.g. more than 20%) double flange limit expansion joints even after cold working and low temperature treatment.
The factor that has a great influence on the sensitivity of double flange limit expansion joint pipeline is the carbon content in double flange limit expansion joint. The effect of other elements on the pipeline depends mainly on their effect on the dissolution and precipitation behavior of carbide, in double flange limit expansion joint, chromium can reduce the solubility of carbon and depletion of chromium, thus increasing the chromium content is beneficial to the resistance of double flange limit expansion joint to pipeline corrosion.

Chromium is very effective in improving the resistance to pitting corrosion and crevice corrosion of double flange limit expansion joints. This effectiveness of chromium is greatly enhanced when molybdenum or molybdenum and nitrogen are present in the double flange limit expansion joints. Molybdenum and nitrogen resistance to pitting and crevice corrosion will be lost or not significant enough.

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Double flange limit expansion joint with complete specifications and stable performance

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