耐高温热缩套是管道建设和维护中必不可少的部件，可提供有效的防腐和机械支撑。这些套管通常由交联聚烯烃材料制成，具有出色的热稳定性和对各种环境因素的抵抗力。
成分和功能
热缩套管设计用于紧密贴合管道接头，特别是在保护涂层可能受损的现场焊接处。套管最初是厚挤压板，经过交联工艺，增强了其耐用性和弹性。加热后，这些套管收缩以紧密贴合管道表面，形成坚固的防潮和其他腐蚀性元素屏障。该过程不仅可以密封接头，还可以防止土壤和其他环境条件造成的机械应力和磨损。
应用
耐高温热缩套管的主要应用是保护石油和天然气等各行各业使用的钢管。它们对于高轮廓接头、法兰和套管特别有效，因为传统涂层在极端条件下可能会失效。套管内的粘合层可有效粘合到钢基材和现有管道涂层上，确保可靠的密封，可承受高温和高压。
优点
耐腐蚀：使用热缩套管的主要好处是它们能够防止焊接接头腐蚀，从而大大延长管道的使用寿命。
易于安装：这些套管在现场使用简单，只需极少的工具和培训。这种效率降低了安装期间的人工成本和停机时间5。
机械保护：除了耐腐蚀外，这些套管还提供机械保护，防止撞击和磨损，使其适用于恶劣环境。
多功能性：耐高温热缩套管可用于管道以外的各种应用，包括电缆的电气绝缘和密封。
总之，耐高温热缩套管在确保管道系统的完整性和使用寿命方面发挥着至关重要的作用。其先进的材料特性使其成为极端条件下需要可靠防腐的行业不可或缺的选择。
Technical Performance
Property | Test temp. | Unit | Requirement | Test result | Test method |
Thickness | — | mm | ≥ 0.85 × nominal value | 0.88 × nominal value | Annex A
ISO21809-3 |
Holiday detection at 5 kV/mm + 5 kV | — | — | no holiday | no holiday | Annex B
ISO21809-3 |
Impact resistance (holiday detection at 5 kV/mm 5 kV after recovery) | 20℃ | J/mm | ≥ 5 | 6.8 | Annex G
ISO21809-3 |
Indentation resistance (holiday detection at 5 kV/mm 5 kV after recovery)
Residual thickness | 50℃ | N/m㎡ | 1.0 | 1.0 | Annex H
ISO21809-3 |
— | mm | ≥ 0.6 | 1.26 |
Cathodic disbondment at 30 days | 23℃ | mm | ≤ 10.0 | 6.5 | Annex F
ISO21809-3 |
50℃ | mm | ≤15 | 10 |
Peel strength at 10 mm/min to pipe surface primed with epoxy and to plant coating | 23℃ | N/mm | ≥ 2.50 | 8.5 | Annex D
ISO21809-3 |
50℃ | N/mm | ≥ 0.20 | 0.46 |
Peel strength at 10 mm/min
to pipe surface and to plant coating | 23℃ | N/mm | ≥ 0.4 | 8.2 | Annex D
ISO21809-3 |
Peel strength at 10 mm/min
to pipe surface after 28-day
hot-water immersion test at Tmax limited as per Annex I | 23℃ | N/mm | ≥ 0.2 | 7.0 | Annex I
ISO21809-3 |
Peel strength at 10 mm/min
to plant coating after 28-day
hot-water immersion test at Tmax limited as per Annex I | 23℃ | N/mm | ≥ 0.4 | 7.5 | Annex I
ISO21809-3 |
Lap shear strength at 10 mm/min | 23℃ | N/m㎡ | ≥ 0.05 | 3.8 | Annex L
ISO21809-3 |
50℃ | N/m㎡ | ≥ 0.07 | 0.39 |
Thermal ageing resistance (aged at Tmax + 20 °C)
– Elongation at break (E100/E0)
– Peel strength to pipe surface (P100/P100) | 23℃ | E100/E0 | ≥ 0.75 | 0.89 | Annex N
ISO21809-3 |
23℃ | P100/P70 | ≥ 0.80 | 0.92 |
23℃ | A100/A70 | ≥ 0.80 | 0.88 |
Ordering Information |
Select sleeve width that will overlap onto the mill-applied coating by 2 inches( 50mm) minimum on each side of the weld joint. Take a 10% shrinkage during installation of sleeve width into account when calculating the minimum sleeve width. | Range for available dimension: |
Sleeve length | Length of PE shrink sleeves
The length should be calculated as the following formula:
L=π×D×1.07+120mm (when pipe OD ≤42inch) L=π×D×1.07( when pipe OD ＞42inch) |
Sleeve width | We can provide 450mm, 480mm, 500mm, 520mm and 550mm supplied PE shrink sleeves width. |
Sleeve thickness | We can provide 1.8mm, 2.0mm, 2.2mm, 2.5mm, 2.8mm , 3.0mm and 3.2mm supplied PE shrink sleeves thickness. |
Primer thickness | There are two kinds of primer application way, wet film and dry film. We can provide 120um, 150um, 200um, 300um and 400um primer thickness. |
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