HDPE heat shrinkage sleeves feature a two-layer structure consisting of a radiation cross-linked high density polyethylene backing and a specialized hot-melt adhesive. For application on steel pipelines, the shrink sleeve is used in combination with a solvent-free, two-components epoxy primer.
The hot-melt adhesive provides excellent adhesion to the HDPE backing, the steel pipe surface, and the epoxy primer. Upon heating, the HDPE backing shrinks while the adhesive layer melts, allowing sleeves to tightly conform to the pipe joint. Together with the epoxy primer, this system forms a strong, continuous anti-corrosion barrier comparable to factory application for three layers polyethylene (3LPE) coatings.
This coating system offers excellent resistance to corrosion, abrasion, impact, ultraviolet (UV) radiation, and aging. In addition, it is easy to apply in field conditions.
Primarily used for pipe connection, field joint coating, wrapping around pipes, anti-corrosion of various pipe joints, and pipe repair applications. Suitable for:
| NO | Test Item | Unit | Performance | Test Result | Test Method |
|---|---|---|---|---|---|
| 1 | Tensile Strength | MPa | ≥17 | 19.47 | ASTM D638 |
| 2 | Elongation | % | ≥400 | 626 | ASTM D638 |
| 3 | Vicat Softening Point | ºC | ≥90 | 92 | ASTM D1525 |
| 4 | Brittleness Temperature | ºC | <-65 | <-65 | ASTM D2671C |
| 5 | Dielectric Strength | MV/m | ≥25 | 33.13 | ASTM D149 |
| 6 | Volume Resistivity | Ω.m | ≥1*10¹³ | 1.1*10¹³ | ASTM D257 |
| 7 | Environment Stress Crack | h | ≥1000 | >1000 | GB/T1842 |
| Chemical | Property | Unit | Performance | Test Result | Test Method |
|---|---|---|---|---|---|
| 10% HCI | Tensile strength | MPa | ≥85 | 104.9 | ASTM D638 |
| Elongation | % | ≥85 | 96.3 | ||
| 10% NaOH | Tensile strength | MPa | ≥85 | 102.1 | ASTM D638 |
| Elongation | % | ≥85 | 95.6 | ||
| 10% NaCl | Tensile strength | MPa | ≥85 | 108.3 | ASTM D638 |
| Elongation | % | ≥85 | 94.1 |
| Property | Unit | Performance | Test Result | Test Method |
|---|---|---|---|---|
| Tensile strength | MPa | ≥14 | 20.7 | ASTM D638 |
| Elongation | % | ≥300 | 630 |
| NO | Test Item | Unit | Performance | Test Result | Test Method |
|---|---|---|---|---|---|
| 1 | Softening Point | ºC | ≥90 | 90.1 | ASTM E28 |
| 2 | Brittleness Temperature | ºC | <-15 | <-15 | ASTM D2671C |
| 3 | Lap Shear | MPa | ≥1.0 | 1.5 | ASTM D1002 |
| Material | Unit | Performance | Test Result | Test Method |
|---|---|---|---|---|
| Steel | N/cm | ≥70 | 145.6 | ASTM D1000 |
| Primer | N/cm | ≥70 | 205.9 | |
| HDPE layer | N/cm | ≥70 | 190.0 |
| Property | Unit | Performance | Test Result | Test Method |
|---|---|---|---|---|
| Shear of cured primer | MPa | ≥5.0 | 12 | SY/T0041 |
Heat shrink sleeve is available in the following configurations:
Our heat shrink sleeves workshop utilizes advanced manufacturing processes to ensure consistent quality and performance.
The heat shrink sleeve equipment is designed and manufactured independently by our company. We also sell this specialized equipment to other manufacturers.
Qingdao Huashida Machinery Co., LTD is a manufacturer of series of plastic pipe machines, municipal pipe machines, pipe insulation & anti-corrosion machines, and pipe jointing & anti-corrosion materials, with more than 20 years of production experience.
We are always attaching great importance to research and development, collaborating closely with Tsinghua University, Beijing University of Chemical Technology, South China University of Technology and scientific research institutions. By absorbing advanced technology home and abroad, we now rank one of the top 3 manufacturers in the industry in China.
We have been working with more than 400 overseas customers and exporting our products to Kazakhstan, Uzbekistan, Middle East, Russia, Nigeria and more countries.
Thank you for your interest in Qingdao Huashida Machinery Co., Ltd. equipment.
For further details, please feel free to contact us at any time. Our team will respond promptly and provide a fully customized solution tailored to your specific requirements and project needs.