Almost all long-distance transmission pipelines use liquid epoxy materials as internal resistance-reducing coating because it reduces the total project cost and save power consumption. All large diameter natural gas pipelines adopt internal resistance-reducing coating.Liquid epoxy coating steel pipes are suitable for conveying underground water, gas and oil.IMRI is good at manufacturing all kinds of coating steel pipes of different sizes.
Specifications:
| Standard | API RP-5L |
| Processing ability | OD:38mm-1620mm;WT:2mm-30mm |
| Length | 6-14m |
| Packing | PE/BE,plastic cap,bundling |
| Technique | Internal coating on welded pipe or seamless pipe |
| Application | Oil and gas field，chemical engineering，energy engineering，water transportation… |
| Service condition | salt,alkaline or sour;underground |
| Place of origin | China |
| MOQ | 3 pieces |
| Transportation | 1.Sea port:Tianjin Xingang port,Qingdao port,Shanghai Luojing port →America,Europe,Africa,Middle East,India, Pakistan,Japan,Korea, Australia…(shipping) 2.Land port:Alataw pass port(Пограничный пункт “Алашанькоу”) |
| Layer Type | Dry film thickness(µm) |
| Type n (normal) | ≥ 200 |
| Type v (increasing) | ≥ 250 |
| Type s (special) | ≥ 300 |
| Note: The thickness of anti-corrosion layer at the welded places shall not be less than 80% of the specified thickness of the anti-corrosion layer of the pipe body. | |
| The main performances of internal coating | ||
| Items | Performance index | Test method |
| Pinhole test | Pinhole dispersion shall be held to a minimum | API RP-5L |
| Dry film thickness | ≥80μm | |
| Cure test | No softening, wrinking or blistering | |
| Adhesion test | No loss of adhesion | |
| Bend test | No loss of adhesion, spalling,crack | |
| Soaking test | No loss of adhesion,softening, wrinking or blistering | |
| Stripping test | Flake off,present powder particles when rolled | |
Production process of liquid epoxy internal coating
