Our HB1571 overhead line insulation sleeves adopt standard multi-layer export packaging with dust-proof, moisture-proof and compression-resistant cartons. Each product is well-packed to avoid damage during long-distance transportation. Clear shipping marks and warning labels ensure standardized handling and safe delivery.
Standard specifications arein stock with fast delivery within 1–3 working days. Bulk or customized orders take 5–10 working days. We support multiple shipping methods including international express, sea freight, air freight and land transport to meet different timeline and budget needs.
Custom packaging, logo printing and personalized labeling are available. Complete customs clearance documents can be provided to support smooth export and project acceptance. All goods are strictly inspected before shipment with reliable after-sales transportation guarantee.
Specification
| Property | Testing Method | Typical Data |
| Tensile strength | ASTM D 2671 | ≥9MPa |
| Elongation at break | ASTM D 2671 | ≥400% |
| Dielectric strength | IEC 243 | ≥15 KV/mm |
| Dielectric constant | IEC 250 | ≤3.0 |
| Volunme resistance | IEC 93 | ≥1.0x10¹³Ω·cm |
| Water absorption | DIN 30672 | 0.5N/cm |
| Water absorption | ISO 62/23℃, 14days | ≤0.5% |
| Flammability(Oi) | ISO 4589 | ≥27 |
| Low temperature flexibility(-40℃,4hr) | ASTM D 2671 | no crack |
Packing & Delivery
Company
Vilun Electric Co., Ltd. is a professional high-tech enterprise that is designated by the country to produce electric control equipment, helical-formed overhead line fitting and electric switchgear.
FAQ
Q1: What material is HB 1571 overhead line insulation sleeve made of?
A1: It is made of radiation cross-linked polyolefin. The material features high insulation strength, UV resistance, anti-aging, corrosion resistance, and can work stably under -40℃ to 80℃ all year round.
Q2: Can HB 1571 sleeve be installed without power cut?
A2: Yes. It adopts snap-on self-locking split structure. Special roller tool is supplied for live-line construction on 0.4kV/10kV lines, no need to dismantle overhead wires, greatly cutting maintenance time and power outage loss.
Q3: What specifications and colors do you have for HB 1571?
A3: Multiple inner diameters are available: Φ10/14/18/20/28/31/38mm, matching 35~800mm² ACSR bare conductors. Standard color is red; yellow, green, black can be customized for phase identification.
Q4: What is your standard packing for HB 1571?
A4: 20 meters per roll wrapped with moisture-proof plastic film, 2 rolls (total 40 meters) in one 5-layer export corrugated carton. Carton dimensions differ by sleeve size, all cartons are reinforced with packing straps to prevent extrusion during shipping.
Q5: What voltage levels can HB 1571 apply to?
A5: Mainly designed for 0.4kV, 10kV and 35kV overhead distribution lines. It can also be used for partial insulation reinforcement of jumpers on 110kV/220kV substations.
Q6: Can you provide samples, test reports and full export documents?
A6: Yes. Small test samples are available. We can offer high voltage withstand test reports, ISO certificates, CO (Certificate of Origin) and other customs clearance documents. OEM & ODM service is also supported for bulk project orders.
