Bitumen Enamel Manufacturers
Bitumen Enamels and Suited Primers to be used in combination therewith are described in “Specification for Bitumen-Based Hot-Applied Coating Materials for Protecting Iron and Steel. Including Suitable Primers Where Required”, BS 4147: 1980 by the British Standards Institution, said matter hereby been incorporated in the present specification. The same applies to examples of Tar Enamels and Suited Primers described in “Specification for Coal-Tar-Based Hot-applied Coating Materials for Protecting Iron and Steel, Including Suitable Primers Where Required”, BS 4164; 1980, also by the British Standards Institution.
Tar Enamels, such as for instance, coal tar enamel, are old and well-known pipe coating materials possessing several excellent properties, inter alia an outstanding protecting effect against corrosion. However, the material is gradually growing outdated, partly due to its environmental drawbacks and partly due to the difficulty of providing the raw materials of the correct quality. In addition, the use of tar enamel is encumbered with draw-backs relating to the production thereof because the properties of the tar enamel may change during the production which involves repeated return pumping’s, reheating and flood coatings, where it cannot be avoided that some of the ingredients of the enamel evaporate.
Enamel Bitumen Grade A, B and C Specifications
| Bitumen Enamel Grade A, B and C Specifications | ||||
| Property | Grade A | Grade B | Grade C | Test Method |
| Filler Content, by Ignition | 25 – 35 | 25 – 35 | 45 – 55 | BS 4147: App. B |
| Density @ 25°C, g/cm3 | 1.2 – 1.4 | 1.2 – 1.4 | 1.4 – 1.65 | BS 4147 |
| Softening Point (ring & bell) | 100 – 120 | 115 – 130 | 120 – 150 | BS 2000 Part 58 |
| Penetration @ 25°C, 10 – 1mm | 10 – 20 | 5 – 17 | 5 – 15 | BS 2000: Part 49 |
| Flash Point (Cleveland Open Cup) | 250 | 260 | 260 | BS 4689 |
| Sa g, Max, Min @60°C, 24h @75°C, 24h |
Max. 1.5
– |
Max. 1.5
– |
Max. 1.5
– |
BS 4147: App. E
– |
| Bend @ 0°C, | Min 20 | Min 15 | Min 10 | BS 4147: App. F |
| Peel Initial & Delayed, Max; mm @30°C @40°C @50°C @60°C |
– – 3.0 3.0 3.0 3.0 |
– – 3.0 3.0 3.0 3.0 |
– – – 3.0 3.0 3.0 |
BS 4147: – 3.0 3.0 3.0 3.0 |
| Impact, Disbanded | – | – | – | BS 4147: App. G |
Advantages of Bitumen Enamel
- Bitumen enamel has excellent adhesion to steel provides a track record of long term corrosion resistance.
- Bitumen enamel used for pipelines designed to different application such as water, gas, oil or any other fluid when the continuous temperature of the fluid being transported does not exceed 70°C (I 58°F)!
- Enamel Bitumen is safer and more environmentally friendly system, then coal tar enamel because of the acidity of tar.
- Enamel Bitumen pipe coatings with varying grades of bitumen enamel and inner and outer wraps along with a thickness as per your design specification.
- The enamel can be applied to various pipe diameters from 90 mm (3.5″) to over 1200 mm (48″).
- Enamel pipe coating bitumen based material is used for many years across the world.
