Rubber lined steel pipes

The rubber lined steel pipes are designed to be used in various abrasive pumping applications.  Applications such as mill discharge, high pressure pumps, long tailings lines, demanding slurry pump applications and gravity pipes.  Each end with vulcanized rubber seal fixed flange.
Wear-resistant and corrosion-resistant rubber lined steel pipe is made of common steel pipe as framework material and using with excellent properties of wear-resistant, corrosion-resistant and heat-resistant rubber as lining layer.  It is compounded by special technology with high-performance adhesive.  Mainly used in metallurgy, electric power, chemical industry, petroleum, coal, cement and other industries area.  In the mining work, it is widely used in the mine tailings conveying system, coal mine backfilling and related pipe system fields.  In particular, the pipeline is very suitable for conveying the temperature between -50°C to +150°C medium, which is easy to wear and corrosion.  We can increase the wall thickness at the pipe corner according to the customer's demand, thus extending the service life.  Meanwhile, the service life of the rubber-lined steel pipe can reach 15-40 years in general.  The pipe can be rotated nearly 90 degrees after 6-8 years of service.  Each time of rotation can extend the serving life, Steel pipe can be repeatedly lined with rubber for three to four times, thus it reducing the use of costs in further.

Parts of specification for rubber-lined pipe

Physical Properties of rubber-lined pipe

Features

1. Excellent Construction

2. Good wear resistance and long service life 

3. High strength and high impact resistance

4. Good corrosion resistance

5. Wide temperature range

6. Quick connection and easy installation 

Rubber - lined steel pipes are a unique type of piping system that combines the strength of steel with the beneficial properties of rubber.

I. Structure and Construction

The basic structure of a rubber - lined steel pipe consists of an outer steel shell and an inner rubber lining. The steel shell provides the necessary structural integrity. It is typically made of carbon steel or stainless steel, depending on the application requirements. Carbon steel is often chosen for its cost - effectiveness and good mechanical strength, while stainless steel is preferred in corrosive environments or when hygiene is a crucial factor, such as in the food and pharmaceutical industries.

The inner rubber lining is the key feature that differentiates these pipes. The rubber used is carefully selected based on the specific application. Natural rubber is sometimes used for its elasticity and resistance to abrasion. However, in many cases, synthetic rubbers like neoprene, butyl rubber, or EPDM (ethylene - propylene - diene monomer) are employed. Neoprene offers excellent resistance to oils, chemicals, and weathering. Butyl rubber is known for its low gas permeability and good chemical resistance, making it suitable for applications where gas containment or chemical handling is involved. EPDM has great resistance to heat, ozone, and aging, which is beneficial for outdoor or high - temperature applications.

The rubber lining is bonded to the inner surface of the steel pipe using specialized adhesives. This bonding process is crucial to ensure that the rubber stays in place during the pipe's operation and does not delaminate.

II. Advantages

One of the major advantages of rubber - lined steel pipes is their corrosion resistance. The rubber lining acts as a barrier between the corrosive substances flowing through the pipe and the steel shell. This is especially important in industries such as mining, where the pipes may carry acidic or abrasive slurries. The rubber can withstand the chemical attack and prevent the steel from corroding, thereby significantly increasing the lifespan of the pipe.

Another advantage is their abrasion resistance. In applications where solid particles are present in the fluid being transported, such as in sand - water slurries in dredging operations, the rubber lining can endure the constant rubbing and scouring of the particles. This helps to maintain the integrity of the pipe and reduces the need for frequent replacement.

Rubber - lined steel pipes also offer good flexibility in terms of design. They can be fabricated in various lengths and diameters to suit different installation requirements. Additionally, they can be bent or shaped to some extent during installation, thanks to the flexibility of the rubber lining.

III. Applications

These pipes find wide applications in many industries. In the mining industry, they are used to transport ore slurries, mine tailings, and process chemicals. In the chemical industry, rubber - lined steel pipes are ideal for handling corrosive acids, alkalis, and various chemical solutions.

In water treatment plants, they can be used to transport water containing certain impurities or chemicals for treatment processes. In the power generation industry, they may be used to carry cooling water or slurry in coal - fired power plants.

IV. Maintenance and Considerations

Maintenance of rubber - lined steel pipes is relatively straightforward. Regular inspections should be carried out to check for any signs of rubber degradation, such as cracking, blistering, or delamination. If any damage is detected, the affected section of the rubber lining can often be repaired or replaced without having to replace the entire pipe.

However, it is important to note that the temperature and pressure limitations of rubber - lined steel pipes must be carefully considered. Excessive temperature or pressure can cause the rubber to deteriorate or the bonding between the rubber and steel to fail.

In conclusion, rubber - lined steel pipes are a valuable solution for transporting a variety of substances in many industries, offering a combination of strength, corrosion resistance, and abrasion resistance.