The composition of 3PE thermal shrinking belt is composed of main belt, solvent-free epoxy primer, fixed sheet, rubber strip, etc. At present, most of the anti-corrosion at the mouth of domestic pipeline is using 3PE thermal shrinking belt or thermal shrinking sleeve.
In the 3PE anti-corrosion system, the epoxy coating is the real anti-corrosion effect on steel tube.
Solvent-free epoxy primer is composed of A and B components, which are mixed and stirred evenly during construction. So what if the customer purchased the hot shrink tape in advance and the primer has expired during construction? Is it still usable? Generally, if the warranty period is not long, then our manufacturer suggests opening a set of primer products to check whether it is dried and coagulated and whether there is any abnormality in appearance. If it has dried up, it is not recommended to use it. You can purchase a separate epoxy primer from the original manufacturer. Lest affect whole antisepsis effect. In addition, when saving epoxy primer, should be stored in dry, matt warehouse, avoid direct sunlight.
When we apply solvent-free epoxy primer, we should ensure that the primer is evenly brushed, and the width of the brush should be basically the same as that of the heat shrink cover. Because do not have dissolvent epoxy coating to have double function, it is anticorrosive coating is adhesive again, be hit so the area must besmear is brushed primer. Be sure to install a heat shrink sleeve while the primer is still wet to ensure a good bonding between the hot melt adhesive and the primer.
When brushing, we try to make the width of the primer brush slightly larger than the width of the heat-shrinkable band or heat-shrinkable sleeve. |
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