PRIMERS
Primers are designed for preparatory coating before application of bitumen-polymer corrosion-preventing mastics when re-insulating gas pipelines. The primers are for pipes of a diameter up to 1420 mm inclusive; operating temperature: up to 35 °Ñ or below 50° for heat-resistant primers. Primer is fully ready-made for application, does not have to be thinned and has very little drying time. Primer ensures high adhesive durability of the entire coating.
The quality and conformity of all the materials have been qualified with top oil-and- gas R&D institutions, such as Scientific-Research Institute of Natural Gases and Gas Technologies GAZPROM VNIIGAZ, Scientific and Research Institute for Oil and Oil Products Transportation (NII TNN) , Russian National Scientific Research Institute for the Construction and Operation of Fuel and Power Sector Pipelines and Facilities (VNIIST). The materials are on the Insulation Materials List of OJSC Gazprom.
PHYSICAL AND MECHANICAL PERFORMANCE PROPERTIES OF PRIMERS
|
Performance ratio, measurement unit |
Standard as per Technical Specifications |
|||
|---|---|---|---|---|
|
TEKHNOGAZ |
TRANSCOR-GAZ |
DECOM-GAZ (heat-resistant) |
Primer Asmol |
|
|
Appearance, colour |
Colour: black. No lumps, blobs, sediment or foreign impurities |
Colour: black. |
Colour: black. No lumps or blobs |
Colour: black. No lumps or blobs |
|
Viscosity as per ÂÇ-4 at 23±2°Ñ, sec |
25±5 |
20±5 |
25±5 |
11-14 |
|
Dry weight, % |
24±3 |
20-50 |
25 |
30±5 |
|
Adhesive coating-to-metal strength 24 hours after application, at a temperature of 23±2°Ñ, list-off technique (v=100mm/min, N/cm), minimum |
25.0 |
30 | 30 |
25±5 |