Hose usually plays an important conveying role in pharmaceutical, chemical and food processing. Because hoses and joints are in direct contact with chemicals or food materials, the use standards of hoses and hose joints are increasingly valued by the industry. As we all know, due to the limitations of metal processing and processing, some materials cannot or are not allowed to come into contact with metal parts, such as chlorides such as hydrochloric acid, high-purity clean fluids, etc., so the metal joints on the hose will be lined with fluorine. It is a clad joint (also known as a fluorine-lined joint); the second is the flanging of the hose PTFE fluorine material.
Let's take a look at the advantages and disadvantages of these two solutions about PTFE-coated fittings and hose PTFE flanging.
Advantages and Disadvantages of Shrouded Joints
Advantages: simple process, low price
shortcoming:
1. Affect the material conveying flow
Coupling of the joint will seriously reduce the material flow; this is a major problem in the use of the clad joint. In order to avoid contact with the material, the joint needs to be wrapped as a whole, so that the actual diameter of the joint that can be used in material transportation becomes smaller, which hinders the transportation of materials and reduces the transportation efficiency; in order to solve the flow problem of material transportation, the customer Will buy a larger diameter hose, which also increases the cost.
2. Easy to accumulate materials
The coated (fluorine-lined) joint protrudes on the inner wall of the hose, which is easy to accumulate; this is also a problem that users often report when using the coated joint. Because the coated joint has a large barrier in the hose, after long-term use Material accumulation will be generated at the inner joint of the pipe, which not only affects normal production, increases energy consumption and labor intensity, and reduces output, but also seriously affects product quality when the accumulated material reaches a certain amount, and even creates potential safety hazards.
3. It is easy to produce material penetration
Material permeation is easy to occur at the contact between the clad joint and the hose.
4. Reduce hose life
During long-term use, the connection between the coated joint and the hose is likely to cause damage to the hose, resulting in a reduction in the service life of the hose.
5. Coupling material of the joint is different from the material of the inner wall of the hose
The coating material of the joint is different from the material of the inner wall of the hose, which will cause unnecessary problems in material transportation.
Advantages and disadvantages of Teflon hose flanging
advantage
1. Completely reject the contact between the conveyed material and the metal of the joint; ensure that the material is conveyed in the hose;
2. The diameter of the hose remains unchanged, which does not affect the normal conveying flow of materials;
3. The inner wall is smooth without obstruction and no material accumulation.
Disadvantages: high process requirements, the price is slightly more expensive than the coated (fluorine-lined) joint, and the supply is tight.
