To protect the line pipes from corrosion and to enhance its operational life, Man Industries offers various options of coating systems to the choice of the customer as per the end use of the pipe. 
The coating is carried out using the latest technology and proven raw materials.
Specifications
Pipe Diameter: 4” to 56”
Plant Capacity: 3,900,000 sq. m. per annum
Process
The FBE, 3LPE and 3PP coating systems are applied on a single process line. The pipe is first heated to remove any moisture present on the surface. It is then blast cleaned to provide the required degree of roughness and inspected for cleanliness. An acidic surface treatment can be done, if required by the specification. The pipe is then heated by electric induction and FBE is sprayed on the line pipe to achieve the required thickness of this layer. Before the FBE gels, the Co-polymer Adhesive is applied by extrusion method followed by application of PE or PP Layer. The coated pipe is then allowed to pass through a quenching tunnel for cooling. Further inspection and cut back removal takes place after the pipe is sufficiently cooled.
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Pipes are coated internally to prevent corrosion and to improve the product flow characteristics. Man Industries offers coating in the form of two part liquid epoxy system in thickness range from 75 to 750 microns.
Specifications
Pipe Diameter: 14” to 84” and above
Plant Capacity: 2,900,000 sq. m. per annum
Process
The operation begins with the pipe being placed on the rotator of the Shot Blasting Machine and the hose pipe with a rotary turbine travels longitudinally inside the pipe from one end to other centrifugally emitting the shots-grit mixture with a high velocity to provide the required degree of roughness to the internal surface of the pipe. The metallic dust generated during the blast operation is collected by an efficient dust collector.
The blast cleaned pipe is transferred to another rotator by the means of hydraulic ejecting and receiving arms. The boom carrying the rotary spray head is inserted inside the pipe, which sprays the epoxy mixture uniformly on the pipe inside surface from one end to other end. The travel speed of the boom flow of epoxy mixture is adjusted to meet the required thickness of the epoxy layer as per the specification. The coating can be performed in single or double layers depending on the thickness of coating.
The coated pipe is then rolled over the padded skid to the curing chamber and finally to stenciling and storage/dispatch section.
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Coaltar Enamel Coating is applied on pipes that are used for both onshore as well as offshore applications. Coaltar Enamel Coating is now being used for over more than 50 years. The coating is applied mostly on pipes that are used in relatively swampy and damp soil conditions and in offshore installations.
Specifications
Pipe Diameter: 4” to 56” and above
Plant Capacity: 1,000,000 sq. m. per annum
Process
The Coaltar Enamel Coating process first begins by the pipe being externally shot blasted to the required standard. A layer of coaltar primer is then immediately applied on the shot blasted surface. This is applied online immediately after the shot blasting.
The pipe is then transported to the coating booth by the means of ejecting and receiving arms and intermediate skid. In the application booth, as the pipe rotates over a parabolic conveyer, the hot molten coaltar is made to fall freely under gravity on the pipe surface with the fiber glass inner and intermediate wraps wrapped simultaneously. As the pipe exits the booth, it is covered with the last outer wrap. Finally, the pipe is made to pass through a tunnel having cold water sprayed on it continuously to cool the coating. After cut back removal, the coated pipe is rolled over a V-board for inspection, stenciling and dispatch.
We have facilities to provide coating solutions at both the plants.
COATING PRODUCTS RANGE | ||
Types of Coating | Range of the Line Pipe Size | Capacity (Millions per sq.m per annum) |
Fusion Bonded Epoxy (FBE Coating) | 4" - 120" | 3.9 |
3 Layer Polyethylene/ 3 layer Polypropylene coating | 4" - 120" | 3.9 |
Coaltar Enamel Coating | 4" - 56" | 1 |
Internal Epoxy Flow Lining/Painting | 12" - 120" | 2.9 |
External Cement Mortar Coating | 12" - 84" | 2 |
Internal Cement Mortar Lining | 16" - 84" | 2 |
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